mybatis 結合Spring 配置使用
阿新 • • 發佈：2019-01-10
maven引入mysql，spring，mybatis
package com.test.dao; import java.util.List; import com.test.vo.User; public interface UserNewDao { public List<User> Login(User user); public User getUsermes(User user); public int getUserNum(); public List<User> getPageUser(long id, int pageSize); /* * public void addUser(User user); * * public void updateUser(User user); * * public void deleteUser(int UserId); */ }
spring配置web.xml<dependency> <groupId>org.springframework</groupId> <artifactId>spring-core</artifactId> <version>${springframework.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-context</artifactId> <version>${springframework.version}</version> <scope>runtime</scope> </dependency> <dependency> <groupId>org.mybatis</groupId> <artifactId>mybatis</artifactId> <version>${mybatis.version}</version> </dependency> <dependency> <groupId>org.mybatis</groupId> <artifactId>mybatis-spring</artifactId> <version>${mybatis-spring.version}</version> </dependency> <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> <version>${mysql.version}</version> </dependency>
<!-- 配置Spring的核心監聽器 --> <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>
建立applicationContext.xml，生成id mybatisuserService物件
beans xmlns="http://www.springframework.org/schema/beans"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-3.0.xsd">
<context:component-scan base-package="com.test.service" />
<!-- mybatis配置 -->
<!-- 配置資料來源 -->
<bean id="dataSource"
class="org.springframework.jdbc.datasource.DriverManagerDataSource">
<property name="driverClassName">
<value>org.gjt.mm.mysql.Driver</value>
</property>
<property name="url">
<value>jdbc:mysql://localhost:3306/usersystem?characterEncoding=utf8&useSSL=true
</value>
<!--springmybaitis是我的資料庫 -->
</property>
<property name="username">
<value>root</value>
</property>
<property name="password">
<value>wys123</value>
</property>
</bean>
<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
<property name="dataSource" ref="dataSource" />
<property name="configLocation" value="classpath:mybatis-config.xml"></property>
</bean>
<bean id="usernewDao" class="org.mybatis.spring.mapper.MapperFactoryBean">
<property name="mapperInterface" value="com.test.dao.UserNewDao"></property>
<property name="sqlSessionFactory" ref="sqlSessionFactory"></property>
</bean>
<bean id="mybatisuserService" class="com.test.service.MyBatisUserService"></bean>
<bean id="user" class="com.test.vo.User"></bean>
</beans>查詢方法：mybatisuserService對應spring中的id
@Resource(name = "mybatisuserService")
private MyBatisUserService mybatisuserService;
@RequestMapping(value = "user.login", method = RequestMethod.GET)
public String userLogin(String username,String userpwd, ModelMap modelMap) {
if (StringUtils.isEmpty(username)) {
modelMap.addAttribute("usernameerror", "使用者名稱不能為空");
return "login";
} else if (StringUtils.isEmpty(userpwd)) {
modelMap.addAttribute("userpwderror", "密碼不能為空");
return "login";
}
User user=new User();
user.setUsername(username);
user.setUserpwd(userpwd);
user = mybatisuserService.Login(user);
if (user == null) {
modelMap.addAttribute("loginerror", "該使用者不存在");
return "login";
}
return "index";
}
public class MyBatisUserService {
@Resource(name = "usernewDao")
private UserNewDao usernewdao;
/*
* public UserNewDao getUsernewdao() { return usernewdao; }
*
* public void setUsernewdao(UserNewDao usernewdao) { this.usernewdao =
* usernewdao; }
*/
public User Login(User user) {
List<User> userlist = usernewdao.Login(user);
for (User list : userlist) {
return list;
}
return null;
}
public User getUsermes(User user) {
return usernewdao.getUsermes(user);
}
public long getUserNun() {
return usernewdao.getUserNum();
}
public List<User> getPageUser(long id, int pageSize) {
return usernewdao.getPageUser(id, pageSize);
}
}<?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>
別名，mapper namespace可以="User“
<typeAlias alias="User" type="com.test.vo.User" />
</typeAliases> -->
<mappers>
<mapper resource="com/test/dao/UserNewDao.xml" />
</mappers>
</configuration>建立Usernew'Dao.xml，namespace對應類名，對應類裡的方法
<mapper namespace="com.test.dao.UserNewDao">
<select id="Login" parameterType="com.test.vo.User" resultType="com.test.vo.User">
SELECT * FROM user WHERE username=#{username} AND userpwd=#{userpwd}
</select>
<!-- 多對一查詢 -->
<select id="getUsermes" parameterType="com.test.vo.User"
resultMap="UserMesPostsMap">
SELECT user.*,usermes.* FROM user, usermes WHERE
user.username=#{username} AND
user.id=usermes.userno
</select>
<resultMap type="com.test.vo.User" id="UserMesPostsMap">
<result property="username" column="username" />
<result property="id" column="id" />
<!-- <result property="userpwd" column="userpwd" /> -->
<association property="usermes" javaType="com.test.vo.Usermes">
<!-- <collection property="usermes" ofType="com.test.vo.Usermes" > -->
<result property="userno" column="userno" />
<result property="username" column="username" />
<result property="userbalance" column="userbalance" />
<!-- </collection> -->
</association>
</resultMap>
<select id="getUserNum" resultType="int">
SELECT count(id) FROM user
</select>
<select id="getPageUser" resultMap="UserMesPostsMap">
SELECT user.*,usermes.* FROM
user left join usermes on
usermes.userno=user.id where
user.id>#{arg0}
<!-- <if test="arg1 < 0 && arg1==0"> -->
limit #{arg1}
<!-- </if> -->
</select>
</mapper> package com.test.dao;
import java.util.List;
import com.test.vo.User;
public interface UserNewDao {
public List<User> Login(User user);
public User getUsermes(User user);
public int getUserNum();
public List<User> getPageUser(long id, int pageSize);
/*
* public void addUser(User user);
*
* public void updateUser(User user);
*
* public void deleteUser(int UserId);
*/
}