spirngmvc整合mybatis实现CRUD

一、建立一张简单的User表

 CREATE TABLE `users` (
 `id` int(20) NOT NULL AUTO_INCREMENT,
 `name` varchar(20) NOT NULL,
 `age` int(20) DEFAULT NULL,
 PRIMARY KEY (`id`)
 ) ENGINE=InnoDB AUTO_INCREMENT=19 DEFAULT CHARSET=utf8;

 -- ----------------------------
 -- Records of users
 -- ----------------------------
 INSERT INTO `users` VALUES ('', '杜崇', '');
 INSERT INTO `users` VALUES ('', '黄春宇', '');
 INSERT INTO `users` VALUES ('', '文杰', '');
 INSERT INTO `users` VALUES ('', '何亮', '');
 INSERT INTO `users` VALUES ('', '超哥', '');
 INSERT INTO `users` VALUES ('', '阿宝', '');

二、用myeclipse建立一个web工程ssi

2.1、jar包

2.2目录结构

2.3、springmvc的核心servlet  ssi-servlet.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"
 xmlns:aop="http://www.springframework.org/schema/aop"
 xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.1.xsd
 http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.1.xsd
 http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.1.xsd
 http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.1.xsd">

 <context:component-scan base-package="org.ssi.controller"/>
 <!--自动注册解析器和适配器-->
 <mvc:annotation-driven/>
 <mvc:default-servlet-handler />
 <aop:aspectj-autoproxy proxy-target-class="true" />
 <!-- 视图解析器的分配器 -->
 <bean class="org.springframework.web.servlet.view.ContentNegotiatingViewResolver">
 <!--先检查请求的后缀名，如果没有匹配的，则spring检查请求头里面设置的  ContentType 来找适合的 mediaType来返回一种 mediaType
 mediaTypes这个属性存储了 你请求后缀名 或者 参数 所对应 的mediaType
 -->
 <property name="mediaTypes">
 <map>
 <entry key="atom" value="application/atom+xml"/>
 <entry key="html" value="text/html"/>
 <entry key="json" value="application/json"/>
 </map>
 </property>
 <!--具体的解析器 -->
 <property name="viewResolvers">
 <list>
 <bean class="org.springframework.web.servlet.view.BeanNameViewResolver"/>
 <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
 <property name="prefix" value="/jsp/"/>
 <property name="suffix" value=".jsp"/>
 </bean>
 </list>
 </property>
 </bean>

 </beans>

2.4、 web.xml

 <?xml version="1.0" encoding="UTF-8"?>
 <web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" version="2.5">
 <display-name></display-name>
 <welcome-file-list>
 <welcome-file>index.jsp</welcome-file>
 </welcome-file-list>

 <servlet>
 <servlet-name>ssi</servlet-name>
 <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
 <load-on-startup>1</load-on-startup>
 </servlet>

 <servlet-mapping>
 <servlet-name>ssi</servlet-name>
 <url-pattern>/</url-pattern>
 </servlet-mapping>

 <filter>
 <filter-name>CharacterEncodingFilter</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>CharacterEncodingFilter</filter-name>
 <url-pattern>/*</url-pattern>
 </filter-mapping>

 <listener>
 <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
 </listener>

 <context-param>
 <param-name>contextConfigLocation</param-name>
 <param-value>
 classpath:applicationContext.xml
 </param-value>
 </context-param>

 <session-config>
 <session-timeout>0</session-timeout>
 </session-config>
 </web-app>

2.5、conf.xml 实际上这个文件可以不要

 <?xml version="1.0" encoding="UTF-8"?>
 <!DOCTYPE configuration PUBLIC "-//mybatis.org//DTD Config 3.0//EN" "http://mybatis.org/dtd/mybatis-3-config.dtd">
 <configuration>

 <typeAliases>
 <typeAlias type="org.ssi.model.User" alias="User"/>
 </typeAliases>
 </configuration>

2.6、配置spring容器 applicationContext.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:p="http://www.springframework.org/schema/p"
 xmlns:context="http://www.springframework.org/schema/context"
 xmlns:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx"
 xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.1.xsd
 http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.1.xsd
 http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.1.xsd
 http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.1.xsd
 ">
 <!-- 加载数据库属性配置文件
 <context:property-placeholder location="classpath:db.properties" ignore-unresolvable="true"/>
 -->

 <bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource">
 <!--
 <property name="driverClassName" value="${jdbc.driver}"></property>
 <property name="url" value="${jdbc.url}"></property>
 <property name="password" value="${jdbc.password}"></property>
 <property name="username" value="${jdbc.username}"></property>
 -->
 <property name="driverClassName" value="com.mysql.jdbc.Driver"></property>
 <property name="url" value="jdbc:mysql://localhost:3306/mybatis"></property>
 <property name="username" value="root"></property>
 <property name="password" value="root"></property>
 <!--maxActive: 最大连接数量-->
 <property name="maxActive" value="150"/>
 <!--minIdle: 最小空闲连接-->
 <property name="minIdle" value="5"/>
 <!--maxIdle: 最大空闲连接-->
 <property name="maxIdle" value="20"/>
 <!--initialSize: 初始化连接-->
 <property name="initialSize" value="30"/>
 <!-- 连接被泄露时是否打印 -->
 <property name="logAbandoned" value="true"/>
 <!--removeAbandoned: 是否自动回收超时连接-->
 <property name="removeAbandoned" value="true"/>
 <!--removeAbandonedTimeout: 超时时间(以秒数为单位)-->
 <property name="removeAbandonedTimeout" value="10"/>
 <!--maxWait: 超时等待时间以毫秒为单位 1000等于60秒-->
 <property name="maxWait" value="1000"/>
 <!-- 在空闲连接回收器线程运行期间休眠的时间值,以毫秒为单位. -->
 <property name="timeBetweenEvictionRunsMillis" value="10000"/>
 <!-- 在每次空闲连接回收器线程(如果有)运行时检查的连接数量 -->
 <property name="numTestsPerEvictionRun" value="10"/>
 <!-- 1000 * 60 * 30 连接在池中保持空闲而不被空闲连接回收器线程-->
 <property name="minEvictableIdleTimeMillis" value="10000"/>
 </bean>

 <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
 <property name="configLocation" value="classpath:conf.xml" />
 <property name="dataSource" ref="dataSource" />
 <property name="mapperLocations" value="classpath:org/ssi/mapper/*.xml" />
 </bean>
 <!-- 配置扫描器 -->
 <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
 <!-- 扫描org.ssi.dao这个包以及它的子包下的所有映射接口类 -->
 <property name="basePackage" value="org.ssi.dao" />
 <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory" />
 </bean> 

 <!--配置事物 -->
 <bean id="txManager"
 class="org.springframework.jdbc.datasource.DataSourceTransactionManager ">
 <property name="dataSource" ref="dataSource"/>
 </bean>
 <!-- 注解事务-->
 <tx:annotation-driven transaction-manager="txManager" />
 <context:annotation-config />
 <!--
 -->
 <context:component-scan base-package="org.ssi.service,org.ssi.dao," />
 </beans>

2.7、dao接口，不用提供实现类，实现类有mybatis实现

 package org.ssi.dao;

 import java.util.List;

 import org.ssi.model.User;

 public interface UserMapperI {
 /**
 * 增
 * @param user
 */
 public void addUser(User user);
 /**
 * 改
 * @param user
 */
 public void updateUser(User user);
 /**
 * 删
 * @param id
 */
 public void deleteUser(int id);
 /**
 * 查
 * @param id
 * @return
 */
 public User getUser(int id);
 /**
 * 查所有
 * @return
 */
 public List<User> getAllUsers();

 }

与配置文件中的类文件以及路径相对应，

2.8、pojo类 user.java

 package org.ssi.model;

 public class User {

 private int id;
 private String name;
 private int age;

 public User(int id, String name, int age) {
 super();
 this.id = id;
 this.name = name;
 this.age = age;
 }

 public User() {
 super();
 }

 public int getId() {
 return id;
 }
 public void setId(int id) {
 this.id = id;
 }
 public String getName() {
 return name;
 }
 public void setName(String name) {
 this.name = name;
 }
 public int getAge() {
 return age;
 }
 public void setAge(int age) {
 this.age = age;
 }

 @Override
 public String toString() {
 return "User [id=" + id + ", name=" + name + ", age=" + age + "]";
 }

 }

2.9、UserMapperI.xml

 <?xml version="1.0" encoding="UTF-8" ?>
 <!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
 <!--
 为这个mapper指定一个唯一的namespace，namespace的值习惯上设置成包名+sql映射文件名，这样就能够保证namespace的值是唯一的
 例如namespace="org.ssi.dao.UserMapperI"就是org.ssi.dao(包名)+UserMapperI(userMapperI.xml文件去除后缀)
 -->
 <mapper namespace="org.ssi.dao.UserMapperI">
 <!-- <resultMap>标签用来处理pojo对象的属性与表字段之间的不匹配问题
 <resultMap id="userResultMap" type="User">
 <id property="id" column="userid" />
 <result property="name" column="username" />
 <result property="age" column="age" />
 </resultMap>
 -->
 <!--
 在select标签中编写查询的SQL语句， 设置select标签的id属性为getUser，id属性值必须是唯一的，
 不能够重复 使用parameterType属性指明查询时使用的参数类型，resultType属性指明查询返回的结果集类型
 resultType="org.mybatis.model.User"就表示将查询结果封装成一个User类的对象返回
 User类就是users表所对应的实体类
 -->
 <!--
 根据id查询得到一个user对象
 -->
 <select id="getUser" parameterType="int"
 resultType="User">
 select * from users where id=#{id}
 </select>

 <insert id="addUser" parameterType="User" >
 insert into users(name ,age) values(#{name},#{age})
 </insert>

 <delete id="deleteUser" parameterType="int">
 delete from users where id=#{id}
 </delete>

 <update id="updateUser" parameterType="User">
 update users set name=#{name},age=#{age} where id=#{id}
 </update>

 <select id="getAllUsers" resultType="User">
 select * from users
 </select>
 </mapper>

该xml文件中的各种操作的id必须要跟dao接口中的方法名字一一对应，否侧会报错。

按照以上配置，springmvc整合mybatis的整体架构已经完成，

三、编写代码进行测试

Controller控制器  SsiController.java

 package org.ssi.controller;

 import java.util.List;

 import javax.servlet.http.HttpServletRequest;

 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.stereotype.Controller;
 import org.springframework.web.bind.annotation.PathVariable;
 import org.springframework.web.bind.annotation.RequestMapping;
 import org.springframework.web.bind.annotation.RequestMethod;
 import org.ssi.dao.UserMapperI;
 import org.ssi.model.User;

 @Controller
 @RequestMapping(value="/controller")
 public class SsiController {

 @Autowired
 private UserMapperI umi;
 private List<User> ulist; 

 @RequestMapping(value="/all",method = RequestMethod.GET)
 public String uList(HttpServletRequest request){

 ulist=this.umi.getAllUsers();
 for (int i = 0; i < ulist.size(); i++) {
 System.out.println(ulist.get(i));
 }
 request.setAttribute("ulist",ulist);
 return "allusers";

 }

 @RequestMapping(value = "/addu", method = RequestMethod.POST)
 public String addU(User u) {

 this.umi.addUser(u);
 return "redirect:all";
 }

 @RequestMapping(value = "/delete/{id}", method = RequestMethod.GET)
 public String deleteU(HttpServletRequest request,@PathVariable Integer id) {

 this.umi.deleteUser(id);
 return "redirect:/controller/all";
 }

 @RequestMapping(value = "/get/{id}", method = RequestMethod.GET)
 public String getUserById(HttpServletRequest request,@PathVariable Integer id) {

 User u=this.umi.getUser(id);
 request.setAttribute("user", u);
 return "userinfo";
 }

 @RequestMapping(value = "/update/{id}", method = RequestMethod.POST)
 public String updateU(HttpServletRequest request,@PathVariable Integer id,User u) {

 User uu=this.umi.getUser(id);
 uu.setName(u.getName());
 uu.setAge(u.getAge());
 this.umi.updateUser(uu);
 return "redirect:/controller/all";
 }
 }

3.1、测试新增

index.jsp

 <%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
 <%
 String path = request.getContextPath();
 String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
 %>

 <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
 <html>
 <head>
 <base href="<%=basePath%>">

 <title>Add User</title>
 <meta http-equiv="pragma" content="no-cache">
 <meta http-equiv="cache-control" content="no-cache">
 <meta http-equiv="expires" content="0">
 <meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
 <meta http-equiv="description" content="This is my page">
 <!--
 <link rel="stylesheet" type="text/css" href="styles.css">
 -->
 </head>

 <body>

 <form action="controller/addu" method="post">
 name :    <input name="name" type="text"><br>
 age :    <input name="age" type="text"><br>
 <input type="submit" value="submit">
 </form>
 <br>

 </body>
 </html>

添加前：

添加：

添加后：

点击edit 19 奥巴马

 userinfo.jsp

 <%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
 <%
 String path = request.getContextPath();
 String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
 %>

 <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
 <html>
 <head>
 <base href="<%=basePath%>">

 <title>UserInfo</title>

 <meta http-equiv="pragma" content="no-cache">
 <meta http-equiv="cache-control" content="no-cache">
 <meta http-equiv="expires" content="0">
 <meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
 <meta http-equiv="description" content="This is my page">
 <!--
 <link rel="stylesheet" type="text/css" href="styles.css">
 -->

 </head>

 <body>
 <p align="center"><font size="20">UserInfo Edit</font></p>
 <div align="center">
 <form action="controller/update/${user.id}" method="post">
 Name :<input type="text" name="name" value="${user.name}"><br>
 Age :<input type="text" name="age" value="${user.age }"><br>
 <input type="submit" value="Usubmit">
 </form>
 </div>
 </body>
 </html>