922 lines
24 KiB
Markdown
922 lines
24 KiB
Markdown
---
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title: SSM整合
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author: TianZD
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top: true
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cover: true
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toc: true
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mathjax: false
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summary: SSM整合学习笔记，粗略学了一下，没有参考价值
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tags:
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- SSM
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- Java
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- 学习笔记
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categories:
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- java
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reprintPolicy: cc_by
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abbrlink: 254393f0
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date: 2022-04-29 11:10:43
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coverImg:
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img:
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password:
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---
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[toc]
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# 1、SpringMVC-SSM整合
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## 1.1、环境
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> 环境
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* IDE：IDEA 2021 1.1
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* 项目管理：Maven ，apache-maven-3.8.1
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* JAVA：JDK 16.01
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* Web服务器：apache-tomcat-9.0.50
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* 数据库：MySQL 8.0.26
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* 数据库管理工具：Navicat premium 15
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> 数据库环境
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```sql
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CREATE DATABASE `ssmbuild`;
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USE `ssmbuild`;
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DROP TABLE IF EXISTS `books`;
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CREATE TABLE `books` (
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`bookID` INT(10) NOT NULL AUTO_INCREMENT COMMENT '书id',
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`bookName` VARCHAR(100) NOT NULL COMMENT '书名',
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`bookCounts` INT(11) NOT NULL COMMENT '数量',
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`detail` VARCHAR(200) NOT NULL COMMENT '描述',
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KEY `bookID` (`bookID`)
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)ENGINE = INNODB DEFAULT CHARSET = utf8;
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INSERT INTO `books`(`bookID`,`bookName`,`bookCounts`,`detail`)
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VALUES (1,'java',1,'从入门到放弃'),
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(2,'MySQL',10,'从删库到跑路'),
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(3,'Linux',5,'从进门到坐牢');
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```
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> 基本环境搭建
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* 新建maven工程
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* 配置pom.xml
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* 导入依赖
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* 配置静态资源
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```xml
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<!--依赖：junit，数据库驱动，连接池，servlet，jsp，mybatis，mybatis-spring，spring,log4j-->
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<dependencies>
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<!--junit-->
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<dependency>
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<groupId>junit</groupId>
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<artifactId>junit</artifactId>
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<version>4.12</version>
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<scope>test</scope>
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</dependency>
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<!--数据库驱动-->
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<dependency>
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<groupId>mysql</groupId>
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<artifactId>mysql-connector-java</artifactId>
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<version>8.0.25</version>
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</dependency>
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<!--数据库连接池c3p0或者dpcp-->
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<dependency>
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<groupId>com.mchange</groupId>
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<artifactId>c3p0</artifactId>
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<version>0.9.5.2</version>
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</dependency>
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<!--servlet jsp-->
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<dependency>
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<groupId>javax.servlet</groupId>
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<artifactId>servlet-api</artifactId>
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<version>2.5</version>
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</dependency>
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<dependency>
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<groupId>javax.servlet.jsp</groupId>
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<artifactId>jsp-api</artifactId>
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<version>2.2</version>
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</dependency>
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<dependency>
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<groupId>javax.servlet</groupId>
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<artifactId>jstl</artifactId>
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<version>1.2</version>
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</dependency>
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<!--mybatis-->
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<dependency>
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<groupId>org.mybatis</groupId>
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<artifactId>mybatis</artifactId>
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<version>3.5.7</version>
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</dependency>
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<!--mybatis-spring-->
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<dependency>
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<groupId>org.mybatis</groupId>
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<artifactId>mybatis-spring</artifactId>
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<version>2.0.2</version>
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</dependency>
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<!--spring-->
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<dependency>
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<groupId>org.springframework</groupId>
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<artifactId>spring-webmvc</artifactId>
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<version>5.3.9</version>
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</dependency>
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<dependency>
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<groupId>org.springframework</groupId>
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<artifactId>spring-jdbc</artifactId>
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<version>5.3.9</version>
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</dependency>
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<!--log4j-->
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<dependency>
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<groupId>log4j</groupId>
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<artifactId>log4j</artifactId>
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<version>1.2.17</version>
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</dependency>
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</dependencies>
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<!--静态资源导出问题-->
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<build>
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<resources>
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<resource>
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<directory>src/main/java</directory>
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<includes>
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<include>**/*.properties</include>
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<include>**/*.xml</include>
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</includes>
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<filtering>false</filtering>
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</resource>
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<resource>
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<directory>src/main/resources</directory>
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<includes>
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<include>**/*.properties</include>
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<include>**/*.xml</include>
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</includes>
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<filtering>false</filtering>
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</resource>
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</resources>
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</build>
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```
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> IDEA连接数据库
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> 建立项目包结构
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* dao
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* pojo
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* controller
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* service
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> 建立核心配置文件
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* spring：applicationContext.xml
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```xml
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<?xml version="1.0" encoding="UTF-8"?>
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<beans xmlns="http://www.springframework.org/schema/beans"
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xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
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xmlns:context="http://www.springframework.org/schema/context"
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xsi:schemaLocation="http://www.springframework.org/schema/beans
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http://www.springframework.org/schema/beans/spring-beans.xsd
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http://www.springframework.org/schema/context
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http://www.springframework.org/schema/context/spring-context-4.0.xsd">
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</beans>
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```
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* mybatis：mybatis-config.xml和database.properties
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mybatis-config.xml
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```xml
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<?xml version="1.0" encoding="UTF-8" ?>
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<!DOCTYPE configuration
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PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
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"http://mybatis.org/dtd/mybatis-3-config.dtd">
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<configuration>
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<settings>
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<!--配置log4j，name必须为logImpl，I为大写，value需要使用mybatis提供的哪些，不能有空格-->
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<setting name="logImpl" value="LOG4J"/>
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</settings>
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<!--配置数据源，交给spring了-->
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<!--配置别名-->
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<typeAliases>
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<package name="com.tian.pojo"/>
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</typeAliases>
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</configuration>
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```
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database.properties
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```properties
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jdbc.driver=com.mysql.cj.jdbc.Driver
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#如果使用mysql8.0以上，需要增加时区设置
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jdbc.url=jdbc:mysql://localhost:3306/ssmbuild?useSSL=true&useUnicode=true&characterEncoding=utf8&serverTimezone=Asia/Shanghai
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jdbc.username=root
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jdbc.password=123456
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```
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* log4j.properties
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```properties
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#将等级为DEBUG的日志信息输出到console和file这两个目的地，console和file的定义在下面的代码
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log4j.rootLogger=DEBUG,console,file
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#控制台输出的相关设置
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log4j.appender.console = org.apache.log4j.ConsoleAppender
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log4j.appender.console.Target = System.out
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log4j.appender.console.Threshold=DEBUG
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log4j.appender.console.layout = org.apache.log4j.PatternLayout
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log4j.appender.console.layout.ConversionPattern=[%c]-%m%n
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#文件输出的相关设置
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log4j.appender.file = org.apache.log4j.RollingFileAppender
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log4j.appender.file.File=./log/tian.log
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log4j.appender.file.MaxFileSize=10mb
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log4j.appender.file.Threshold=DEBUG
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log4j.appender.file.layout=org.apache.log4j.PatternLayout
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log4j.appender.file.layout.ConversionPattern=[%p][%d{yy-MM-dd}][%c]%m%n
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#日志输出级别
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log4j.logger.org.mybatis=DEBUG
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log4j.logger.java.sql=DEBUG
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log4j.logger.java.sql.Statement=DEBUG
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log4j.logger.java.sql.ResultSet=DEBUG
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log4j.logger.java.sql.PreparedStatement=DEBUG
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```
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## 1.2、Mybatis层
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主要是dao层和service层，底层相关，MVC的Model层，数据和业务
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> pojo层
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```java
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public class Books {
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private int bookID;
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private String bookName;
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private int bookCounts;
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private String detail;
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//get、set、toString、construct
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}
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```
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> dao层
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* 接口
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```java
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public interface BookMapper {
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//add
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int addBook(Books books);
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//delete
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int deleteBook(@Param("bookID") int id);
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//update
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int updateBook(Books books);
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//select one
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Books selectBookById(@Param("bookID") int id);
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//select all
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List<Books> selectBookAll();
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}
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```
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* Mapper.xml
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```xml
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<?xml version="1.0" encoding="UTF-8" ?>
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<!DOCTYPE mapper
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PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
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"http://mybatis.org/dtd/mybatis-3-mapper.dtd">
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<mapper namespace="com.tian.dao.BookMapper">
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<insert id="addBook" parameterType="books">
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insert into ssmbuild.books (bookName, bookCounts, detail)
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values (#{bookName},#{bookCounts},#{detail});
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</insert>
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<delete id="deleteBook" parameterType="int">
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delete
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from ssmbuild.books
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where bookID = #{bookID};
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</delete>
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<update id="updateBook" parameterType="books">
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update ssmbuild.books
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set bookName = #{bookName}, bookCounts = #{bookCounts}, detail = #{detail}
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where bookID = #{bookID};
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</update>
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<select id="selectBookById" resultType="books">
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select *
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from ssmbuild.books
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where bookID = #{bookID};
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</select>
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<select id="selectBookAll" resultType="books">
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select *
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from ssmbuild.books;
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</select>
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</mapper>
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```
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* 绑定mapper.xml到mybatis-config.xml配置文件中
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```xml
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<mappers>
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<mapper class="com.tian.dao.BookMapper"/>
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<!-- <mapper resource="com/tian/dao/BookMapper.xml"/>-->
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<!-- <package name="com.tian.dao"/>-->
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</mappers>
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```
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> service层
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* BookService接口
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```java
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public interface BookService {
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//add
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int addBook(Books books);
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//delete
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int deleteBook(int id);
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//update
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int updateBook(Books books);
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//select one
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Books selectBookById(int id);
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//select all
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List<Books> selectBookAll();
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}
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```
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* 接口实现类
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```java
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public class BookServiceImpl implements BookService{
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//业务层调用dao层：组合dao层
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private BookMapper bookMapper;
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public void setBookMapper(BookMapper bookMapper) {
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this.bookMapper = bookMapper;
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}
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@Override
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public int addBook(Books books) {
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return bookMapper.addBook(books);
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}
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@Override
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public int deleteBook(int id) {
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return bookMapper.deleteBook(id);
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}
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@Override
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public int updateBook(Books books) {
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return bookMapper.updateBook(books);
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}
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@Override
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public Books selectBookById(int id) {
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return bookMapper.selectBookById(id);
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}
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@Override
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public List<Books> selectBookAll() {
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return bookMapper.selectBookAll();
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}
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}
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```
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## 1.3、Spring层
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> dao层
|
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spring-dao.xml
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|
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* 关联数据库配置文件
|
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* 连接池
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* sqlSessionFactory
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* sqlSession
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|
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```xml
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<?xml version="1.0" encoding="UTF-8"?>
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<beans xmlns="http://www.springframework.org/schema/beans"
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xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
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xmlns:context="http://www.springframework.org/schema/context"
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xsi:schemaLocation="http://www.springframework.org/schema/beans
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http://www.springframework.org/schema/beans/spring-beans.xsd
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http://www.springframework.org/schema/context
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http://www.springframework.org/schema/context/spring-context-4.0.xsd">
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<!--关联数据库配置文件-->
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<context:property-placeholder location="classpath:database.properties"/>
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|
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<!--连接池
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dbcp:半自动化操作，不能自动连接
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c3p0：自动化链接（自动化加载配置文件，并且可以自动设置到对象中）
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druid
|
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hikari-->
|
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<bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
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<property name="driverClass" value="${jdbc.driver}"/>
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<property name="jdbcUrl" value="${jdbc.url}"/>
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<property name="user" value="${jdbc.username}"/>
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<property name="password" value="${jdbc.password}"/>
|
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<!--c3p0连接池的私有属性-->
|
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<property name="maxPoolSize" value="30"/>
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<property name="minPoolSize" value="10"/>
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<!--关闭连接后不自动commit-->
|
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<property name="autoCommitOnClose" value="false"/>
|
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<!--获取连接超时时间-->
|
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<property name="checkoutTimeout" value="100000"/>
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<!--当前连接失败重试次数-->
|
||
<property name="acquireRetryAttempts" value="2"/>
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</bean>
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|
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<!--sqlSessionFactory-->
|
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<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
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<property name="dataSource" ref="dataSource"/>
|
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<!--绑定mybatis配置文件-->
|
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<property name="configLocation" value="classpath:mybatis-config.xml"/>
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</bean>
|
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|
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<!--采用方法3
|
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方法1：dao编写BookMapper实现类，添加SqlSessionTemplate属性
|
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方法2：dao编写BookMapper实现类，同时继承SqlSessionDaoSupport，通过get方法可以直接获的sqlSession
|
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方法3：配置dao扫描包，动态的实现了dao接口可以注入到spring容器中-->
|
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<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
|
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<!--注入sqlsession,由于属性为string，用value-->
|
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<property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"/>
|
||
<!--要扫描的dao包-->
|
||
<property name="basePackage" value="com.tian.dao"/>
|
||
</bean>
|
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</beans>
|
||
```
|
||
|
||
> service
|
||
|
||
spring-service.xml
|
||
|
||
* 扫描service下的包
|
||
* 将业务类注入到spring，可以通过配置或者注解实现
|
||
* 声明式事务配置
|
||
* AOP事务支持
|
||
|
||
```xml
|
||
<?xml version="1.0" encoding="UTF-8"?>
|
||
<beans xmlns="http://www.springframework.org/schema/beans"
|
||
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
|
||
xmlns:context="http://www.springframework.org/schema/context"
|
||
xsi:schemaLocation="http://www.springframework.org/schema/beans
|
||
http://www.springframework.org/schema/beans/spring-beans.xsd
|
||
http://www.springframework.org/schema/context
|
||
http://www.springframework.org/schema/context/spring-context-4.0.xsd">
|
||
|
||
<!--扫描service下的包-->
|
||
<context:component-scan base-package="com.tian.service"/>
|
||
|
||
<!--将业务类注入到spring，可以通过配置或者注解实现
|
||
注解：类上@Service 属性上@Autowired-->
|
||
<bean id="BookServiceImpl" class="com.tian.service.BookServiceImpl">
|
||
<property name="bookMapper" ref="bookMapper"/>
|
||
</bean>
|
||
|
||
<!--声明式事务配置-->
|
||
<bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
|
||
<!--注入数据源-->
|
||
<property name="dataSource" ref="dataSource"/>
|
||
</bean>
|
||
|
||
<!--AOP事务支持-->
|
||
</beans>
|
||
```
|
||
|
||
## 1.4、SpringMVC层
|
||
|
||
> 增加web支持
|
||
|
||
> web.xml
|
||
|
||
* dispatchservlet
|
||
* 乱码过滤
|
||
|
||
```xml
|
||
<?xml version="1.0" encoding="UTF-8"?>
|
||
<web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"
|
||
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
|
||
xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_4_0.xsd"
|
||
version="4.0">
|
||
|
||
<!--DispatchServlet-->
|
||
<servlet>
|
||
<servlet-name>dispatcherServlet</servlet-name>
|
||
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
|
||
<!-- 关联配置文件 -->
|
||
<init-param>
|
||
<param-name>contextConfigLocation</param-name>
|
||
<param-value>classpath:springmvc-servlet.xml</param-value>
|
||
</init-param>
|
||
<!-- 启动优先级：越小越优先启动 -->
|
||
<load-on-startup>1</load-on-startup>
|
||
</servlet>
|
||
<servlet-mapping>
|
||
<servlet-name>dispatcherServlet</servlet-name>
|
||
<url-pattern>/</url-pattern>
|
||
</servlet-mapping>
|
||
|
||
<!--乱码过滤-->
|
||
<filter>
|
||
<filter-name>encodingFilter</filter-name>
|
||
<filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
|
||
<init-param>
|
||
<param-name>encoding</param-name>
|
||
<param-value>utf-8</param-value>
|
||
</init-param>
|
||
</filter>
|
||
<filter-mapping>
|
||
<filter-name>encodingFilter</filter-name>
|
||
<url-pattern>/*</url-pattern>
|
||
</filter-mapping>
|
||
|
||
<!--session-->
|
||
<session-config>
|
||
<session-timeout>15</session-timeout>
|
||
</session-config>
|
||
|
||
</web-app>
|
||
```
|
||
|
||
> springmvc-servlet.xml
|
||
|
||
```xml
|
||
<?xml version="1.0" encoding="UTF-8"?>
|
||
<beans xmlns="http://www.springframework.org/schema/beans"
|
||
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
|
||
xmlns:context="http://www.springframework.org/schema/context"
|
||
xmlns:mvc="http://www.springframework.org/schema/mvc"
|
||
xsi:schemaLocation="http://www.springframework.org/schema/beans
|
||
http://www.springframework.org/schema/beans/spring-beans.xsd
|
||
http://www.springframework.org/schema/context
|
||
http://www.springframework.org/schema/context/spring-context-4.0.xsd
|
||
http://www.springframework.org/schema/mvc
|
||
https://www.springframework.org/schema/mvc/spring-mvc.xsd">
|
||
|
||
<!-- 扫描包 -->
|
||
<context:component-scan base-package="com.tian.controller"/>
|
||
<!-- 过滤静态资源 -->
|
||
<mvc:default-servlet-handler/>
|
||
<!-- 注解驱动 -->
|
||
<mvc:annotation-driven/>
|
||
|
||
<!-- 视图解析器 -->
|
||
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver"
|
||
id="internalResourceViewResolver">
|
||
<!-- 前缀 -->
|
||
<property name="prefix" value="/WEB-INF/jsp/"/>
|
||
<!-- 后缀 -->
|
||
<property name="suffix" value=".jsp"/>
|
||
</bean>
|
||
</beans>
|
||
```
|
||
|
||
## 1.5、配置文件整合
|
||
|
||
applicationContext.xml
|
||
|
||
```xml
|
||
<?xml version="1.0" encoding="UTF-8"?>
|
||
<beans xmlns="http://www.springframework.org/schema/beans"
|
||
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
|
||
xmlns:context="http://www.springframework.org/schema/context"
|
||
xsi:schemaLocation="http://www.springframework.org/schema/beans
|
||
http://www.springframework.org/schema/beans/spring-beans.xsd
|
||
http://www.springframework.org/schema/context
|
||
http://www.springframework.org/schema/context/spring-context-4.0.xsd">
|
||
|
||
<import resource="spring-dao.xml"/>
|
||
<import resource="spring-service.xml"/>
|
||
<import resource="springmvc-servlet.xml"/>
|
||
</beans>
|
||
```
|
||
|
||
# 2、实际业务实现
|
||
|
||
## 2.1、查询书籍功能
|
||
|
||
### 查询
|
||
|
||
将controller和web交互
|
||
|
||
> controller
|
||
|
||
*BookController.class*
|
||
|
||
```java
|
||
@Controller
|
||
@RequestMapping("/book")
|
||
public class BookController {
|
||
//controller层调用service层
|
||
@Autowired
|
||
@Qualifier("BookServiceImpl")
|
||
private BookService bookService;
|
||
|
||
//查询全部书籍，并返回书籍展示页面
|
||
public String selectAllBook(Model model) {
|
||
List<Books> books = bookService.selectBookAll();
|
||
model.addAttribute("list", books);
|
||
return "allBook";
|
||
}
|
||
|
||
}
|
||
```
|
||
|
||
> jsp
|
||
|
||
* allBook.jsp
|
||
* index.jsp，设置由首页跳转
|
||
|
||
```jsp
|
||
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
|
||
<html>
|
||
<head>
|
||
<title>书籍展示</title>
|
||
</head>
|
||
<body>
|
||
<h1>书籍展示</h1>
|
||
</body>
|
||
</html>
|
||
```
|
||
|
||
```jsp
|
||
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
|
||
<html>
|
||
<head>
|
||
<title>$Title$</title>
|
||
</head>
|
||
<body>
|
||
$END$
|
||
<h3>
|
||
<a href="${pageContext.request.contextPath}/book/allBook">进入书籍展示页面</a>
|
||
</h3>
|
||
</body>
|
||
</html>
|
||
```
|
||
|
||
### 错误
|
||
|
||
```bash
|
||
org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type 'com.tian.service.BookService' available: expected at least 1 bean which qualifies as autowire candidate. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true), @org.springframework.beans.factory.annotation.Qualifier("BookServiceImpl")}
|
||
```
|
||
|
||
bean不存在
|
||
|
||
> 解决
|
||
|
||
web.xml中需要引入applicationContxt.xml而不是springmvc-config.xml
|
||
|
||
### 美化
|
||
|
||
> 首页
|
||
|
||
```jsp
|
||
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
|
||
<html>
|
||
<head>
|
||
<title>首页</title>
|
||
<style>
|
||
a {
|
||
text-decoration: none;
|
||
color: black;
|
||
font-size: 18px;
|
||
}
|
||
h3 {
|
||
width: 180px;
|
||
height: 38px;
|
||
margin: 100px auto;
|
||
text-align: center;
|
||
line-height: 38px;
|
||
background: deepskyblue;
|
||
border-radius: 5px;
|
||
}
|
||
</style>
|
||
</head>
|
||
<body>
|
||
<h3>
|
||
<a href="${pageContext.request.contextPath}/book/allBook">进入书籍展示页面</a>
|
||
</h3>
|
||
</body>
|
||
</html>
|
||
```
|
||
|
||
|
||
|
||
> 查询页
|
||
|
||
```jsp
|
||
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
|
||
<html>
|
||
<head>
|
||
<title>书籍展示</title>
|
||
</head>
|
||
<body>
|
||
<table align="center" border="1" width="300" height="100" cellspacing="0"><!--设置表格剧中，边框线粗细，每个格子的长宽,单元格之间的间距为0-->
|
||
<tr align="center">
|
||
<th colspan="4" bgcolor="#00bfff">书籍列表</th><!--表头，自带加粗居中属性,colspan设置合并1行1列和2列的单元格，rowspan设置跨列合并-->
|
||
</tr>
|
||
<tr bgcolor="#ffe4c4">
|
||
<td align="center"><b>书籍ID</b></td><!--设置字体居中，加粗-->
|
||
<td align="center"><b>书籍名称</b></td>
|
||
<td align="center"><b>书籍数量</b></td>
|
||
<td align="center"><b>书籍描述</b></td>
|
||
</tr>
|
||
<c:forEach var="books" items="${list}">
|
||
<tr align="center" bgcolor="#a9a9a9">
|
||
<td>${books.bookID}</td>
|
||
<td>${books.bookName}</td>
|
||
<td>${books.bookCounts}</td>
|
||
<td>${books.detail}</td>
|
||
</tr>
|
||
</c:forEach>
|
||
</table>
|
||
</body>
|
||
</html>
|
||
```
|
||
|
||
|
||
|
||
## 2.2、添加书籍功能
|
||
|
||
> 待跳转页面
|
||
|
||
addBook.jsp
|
||
|
||
```jsp
|
||
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
|
||
<html>
|
||
<head>
|
||
<title>添加书籍页面</title>
|
||
</head>
|
||
<body>
|
||
<form action="${pageContext.request.contextPath}/book/addBook" method="post">
|
||
<table align="center" border="0">
|
||
<tr>
|
||
<td>书籍名称: </td>
|
||
<td><input type="text" name="书籍名称" required></td>
|
||
</tr>
|
||
<tr>
|
||
<td>书籍数量: </td>
|
||
<td><input type="text" name="书籍数量" required></td>
|
||
</tr>
|
||
<tr>
|
||
<td>书籍描述: </td>
|
||
<td><input type="text" name="书籍描述"></td>
|
||
</tr>
|
||
<tr align="center">
|
||
<td><input type="reset" value="重置"></td>
|
||
<td><input type="submit" value="添加"></td>
|
||
</tr>
|
||
</table>
|
||
</form>
|
||
</body>
|
||
</html>
|
||
```
|
||
|
||
|
||
|
||
> controller
|
||
|
||
```java
|
||
// 跳转到添加书籍界面
|
||
@RequestMapping("/toAddBook")
|
||
public String toAddBook() {
|
||
return "addBook";
|
||
}
|
||
|
||
//添加书籍请求
|
||
@RequestMapping("/addBook")
|
||
public String addBook(Books book) {
|
||
bookService.addBook(book);
|
||
return "redirect:/book/allBook";
|
||
}
|
||
```
|
||
|
||
> 跳转按钮
|
||
|
||
allBook.jsp
|
||
|
||
```xml
|
||
<style>
|
||
#a1{
|
||
text-decoration: none;
|
||
}
|
||
</style>
|
||
|
||
<tr>
|
||
<td colspan="4" align="center"><a id="a1" href="${pageContext.request.contextPath}/book/toAddBook">添加书籍</a></td>
|
||
</tr>
|
||
```
|
||
|
||
|
||
|
||
## 2.3、修改、删除书籍
|
||
|
||
> 按钮
|
||
|
||
allBook.jsp
|
||
|
||
```jsp
|
||
<td>
|
||
<a href="${pageContext.request.contextPath}/book/toUpdateBook/${books.bookID}">修改</a>
|
||
|
|
||
<a href="${pageContext.request.contextPath}/book/deleteBook/${books.bookID}">删除</a>
|
||
</td>
|
||
```
|
||
|
||
|
||
|
||
> controller
|
||
|
||
```java
|
||
//跳转到修改请求页面
|
||
@RequestMapping("/toUpdateBook/{bookId}")
|
||
public String toUpdateBook(@PathVariable("bookId") int id, Model model) {
|
||
Books books = bookService.selectBookById(id);
|
||
model.addAttribute("bookSelected", books);
|
||
return "updateBook";
|
||
}
|
||
|
||
//修改书籍
|
||
@RequestMapping("/updateBook")
|
||
public String updateBook(Books books) {
|
||
bookService.updateBook(books);
|
||
return "redirect:/book/allBook";
|
||
}
|
||
|
||
//删除书籍
|
||
@RequestMapping("/deleteBook/{bookId}")
|
||
public String deleteBook(@PathVariable("bookId") int id) {
|
||
bookService.deleteBook(id);
|
||
return "redirect:/book/allBook";
|
||
}
|
||
}
|
||
```
|
||
|
||
> 待跳转页面
|
||
|
||
updateBook.jsp
|
||
|
||
```jsp
|
||
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
|
||
<html>
|
||
<head>
|
||
<title>修改书籍</title>
|
||
</head>
|
||
<body>
|
||
<form action="${pageContext.request.contextPath}/book/updateBook" method="post">
|
||
<%--隐藏于传递不需要用户修改的bookID--%>
|
||
<input type="hidden" name="bookID" value="${bookSelected.bookID}">
|
||
<table align="center" border="0">
|
||
<tr>
|
||
<td>书籍名称: </td>
|
||
<td><input type="text" name="bookName" value="${bookSelected.bookName}" required></td>
|
||
</tr>
|
||
<tr>
|
||
<td>书籍数量: </td>
|
||
<td><input type="text" name="bookCounts" value="${bookSelected.bookCounts}" required></td>
|
||
</tr>
|
||
<tr>
|
||
<td>书籍描述: </td>
|
||
<td><input type="text" name="detail" value="${bookSelected.detail}"></td>
|
||
</tr>
|
||
<tr align="center">
|
||
<td><input type="reset" value="重置"></td>
|
||
<td><input type="submit" value="修改"></td>
|
||
</tr>
|
||
</table>
|
||
</form>
|
||
</body>
|
||
</html>
|
||
```
|
||
|
||
|
||
|
||
|
||
|