<project xmlns="http://maven.apache.org/POM/.." xmlns:xsi="http://www.w.org//XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/.. http://maven.apache.org/maven-v__.xsd"> <modelVersion>..</modelVersion> <groupId>me.gacl</groupId> <artifactId>spring-mybatis</artifactId> <packaging>war</packaging> <version>.-SNAPSHOT</version> <name>spring-mybatis Maven Webapp</name> <url>http://maven.apache.org</url> <dependencies> <dependency> <groupId>junit</groupId> <artifactId>junit</artifactId> <version>..</version> <scope>test</scope> </dependency> </dependencies> <build> <finalName>spring-mybatis</finalName> </build> </project>
<dependency> <groupId>junit</groupId> <artifactId>junit</artifactId> <version>..</version> <scope>test</scope> </dependency>
<project xmlns="http://maven.apache.org/POM/.." xmlns:xsi="http://www.w.org//XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/.. http://maven.apache.org/maven-v__.xsd"> <modelVersion>..</modelVersion> <groupId>me.gacl</groupId> <artifactId>spring-mybatis</artifactId> <packaging>war</packaging> <version>.-SNAPSHOT</version> <name>spring-mybatis</name> <url>http://maven.apache.org</url> <dependencies> </dependencies> <build> <finalName>spring-mybatis</finalName> </build> </project>
Create DATABASE spring4_mybatis3; USE spring4_mybatis3; DROP TABLE IF EXISTS t_user; CREATE TABLE t_user ( user_id char(32) NOT NULL, user_name varchar(30) DEFAULT NULL, user_birthday date DEFAULT NULL, user_salary double DEFAULT NULL, PRIMARY KEY (user_id) ) ENGINE=InnoDB DEFAULT CHARSET=utf8;
<?xml version="." encoding="UTF-"?> <!DOCTYPE generatorConfiguration PUBLIC "-//mybatis.org//DTD MyBatis Generator Configuration .//EN" "http://mybatis.org/dtd/mybatis-generator-config__.dtd"> <generatorConfiguration> <!-- 数据库驱动包位置 --> <classPathEntry location="E:\repository\mysql\mysql-connector-java\..\mysql-connector-java-...jar" /> <!-- <classPathEntry location="C:\oracle\product\..\db_\jdbc\lib\ojdbc.jar" />--> <context id="DBTables" targetRuntime="MyBatis"> <commentGenerator> <property name="suppressAllComments" value="true" /> </commentGenerator> <!-- 数据库链接URL、用户名、密码 --> <jdbcConnection driverClass="com.mysql.jdbc.Driver" connectionURL="jdbc:mysql://localhost:/spring_mybatis" userId="root" password="XDP"> <!--<jdbcConnection driverClass="oracle.jdbc.driver.OracleDriver" connectionURL="jdbc:oracle:thin:@localhost::orcl" userId="msa" password="msa">--> </jdbcConnection> <javaTypeResolver> <property name="forceBigDecimals" value="false" /> </javaTypeResolver> <!-- 生成实体类的包名和位置,这里配置将生成的实体类放在me.gacl.domain这个包下 --> <javaModelGenerator targetPackage="me.gacl.domain" targetProject="C:\Users\gacl\spring-mybatis\src\main\java"> <property name="enableSubPackages" value="true" /> <property name="trimStrings" value="true" /> </javaModelGenerator> <!-- 生成的SQL映射文件包名和位置,这里配置将生成的SQL映射文件放在me.gacl.mapping这个包下 --> <sqlMapGenerator targetPackage="me.gacl.mapping" targetProject="C:\Users\gacl\spring-mybatis\src\main\java"> <property name="enableSubPackages" value="true" /> </sqlMapGenerator> <!-- 生成DAO的包名和位置,这里配置将生成的dao类放在me.gacl.dao这个包下 --> <javaClientGenerator type="XMLMAPPER" targetPackage="me.gacl.dao" targetProject="C:\Users\gacl\spring-mybatis\src\main\java"> <property name="enableSubPackages" value="true" /> </javaClientGenerator> <!-- 要生成那些表(更改tableName和domainObjectName就可以) --> <table tableName="t_user" domainObjectName="User" enableCountByExample="false" enableUpdateByExample="false" enableDeleteByExample="false" enableSelectByExample="false" selectByExampleQueryId="false" /> </context> </generatorConfiguration>
java -jar mybatis-generator-core-1.3.2.jar -configfile generator.xml -overwrite
package me.gacl.dao;
import me.gacl.domain.User;
public interface UserMapper {
int deleteByPrimaryKey(String userId);
int insert(User record);
int insertSelective(User record);
User selectByPrimaryKey(String userId);
int updateByPrimaryKeySelective(User record);
int updateByPrimaryKey(User record);
}
package me.gacl.domain;
import java.util.Date;
public class User {
private String userId;
private String userName;
private Date userBirthday;
private Double userSalary;
public String getUserId() {
return userId;
}
public void setUserId(String userId) {
this.userId = userId == null ? null : userId.trim();
}
public String getUserName() {
return userName;
}
public void setUserName(String userName) {
this.userName = userName == null ? null : userName.trim();
}
public Date getUserBirthday() {
return userBirthday;
}
public void setUserBirthday(Date userBirthday) {
this.userBirthday = userBirthday;
}
public Double getUserSalary() {
return userSalary;
}
public void setUserSalary(Double userSalary) {
this.userSalary = userSalary;
}
}
<?xml version="." encoding="UTF-" ?>
<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper .//EN" "http://mybatis.org/dtd/mybatis--mapper.dtd" >
<mapper namespace="me.gacl.dao.UserMapper" >
<resultMap id="BaseResultMap" type="me.gacl.domain.User" >
<id column="user_id" property="userId" jdbcType="CHAR" />
<result column="user_name" property="userName" jdbcType="VARCHAR" />
<result column="user_birthday" property="userBirthday" jdbcType="DATE" />
<result column="user_salary" property="userSalary" jdbcType="DOUBLE" />
</resultMap>
<sql id="Base_Column_List" >
user_id, user_name, user_birthday, user_salary
</sql>
<select id="selectByPrimaryKey" resultMap="BaseResultMap" parameterType="java.lang.String" >
select
<include refid="Base_Column_List" />
from t_user
where user_id = #{userId,jdbcType=CHAR}
</select>
<delete id="deleteByPrimaryKey" parameterType="java.lang.String" >
delete from t_user
where user_id = #{userId,jdbcType=CHAR}
</delete>
<insert id="insert" parameterType="me.gacl.domain.User" >
insert into t_user (user_id, user_name, user_birthday,
user_salary)
values (#{userId,jdbcType=CHAR}, #{userName,jdbcType=VARCHAR}, #{userBirthday,jdbcType=DATE},
#{userSalary,jdbcType=DOUBLE})
</insert>
<insert id="insertSelective" parameterType="me.gacl.domain.User" >
insert into t_user
<trim prefix="(" suffix=")" suffixOverrides="," >
<if test="userId != null" >
user_id,
</if>
<if test="userName != null" >
user_name,
</if>
<if test="userBirthday != null" >
user_birthday,
</if>
<if test="userSalary != null" >
user_salary,
</if>
</trim>
<trim prefix="values (" suffix=")" suffixOverrides="," >
<if test="userId != null" >
#{userId,jdbcType=CHAR},
</if>
<if test="userName != null" >
#{userName,jdbcType=VARCHAR},
</if>
<if test="userBirthday != null" >
#{userBirthday,jdbcType=DATE},
</if>
<if test="userSalary != null" >
#{userSalary,jdbcType=DOUBLE},
</if>
</trim>
</insert>
<update id="updateByPrimaryKeySelective" parameterType="me.gacl.domain.User" >
update t_user
<set >
<if test="userName != null" >
user_name = #{userName,jdbcType=VARCHAR},
</if>
<if test="userBirthday != null" >
user_birthday = #{userBirthday,jdbcType=DATE},
</if>
<if test="userSalary != null" >
user_salary = #{userSalary,jdbcType=DOUBLE},
</if>
</set>
where user_id = #{userId,jdbcType=CHAR}
</update>
<update id="updateByPrimaryKey" parameterType="me.gacl.domain.User" >
update t_user
set user_name = #{userName,jdbcType=VARCHAR},
user_birthday = #{userBirthday,jdbcType=DATE},
user_salary = #{userSalary,jdbcType=DOUBLE}
where user_id = #{userId,jdbcType=CHAR}
</update>
</mapper>
<dependency> <groupId>org.springframework</groupId> <artifactId>spring-core</artifactId> <version>4.1.4.RELEASE</version> </dependency>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd"> <modelVersion>4.0.0</modelVersion> <groupId>me.gacl</groupId> <artifactId>spring4-mybatis3</artifactId> <packaging>war</packaging> <version>1.0-SNAPSHOT</version> <name>spring4-mybatis3</name> <url>http://maven.apache.org</url> <dependencies> <!-- 添加Spring4.1.4的核心包 --> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-core</artifactId> <version>4.1.4.RELEASE</version> </dependency> </dependencies> <build> <finalName>spring4-mybatis3</finalName> </build> </project>
<project xmlns="http://maven.apache.org/POM/.." xmlns:xsi="http://www.w.org//XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/.. http://maven.apache.org/maven-v__.xsd"> <modelVersion>..</modelVersion> <groupId>me.gacl</groupId> <artifactId>spring-mybatis</artifactId> <packaging>war</packaging> <version>.-SNAPSHOT</version> <name>spring-mybatis</name> <url>http://maven.apache.org</url> <dependencies> <!-- 添加Spring-core包 --> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-core</artifactId> <version>...RELEASE</version> </dependency> <!-- 添加spring-context包 --> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-context</artifactId> <version>...RELEASE</version> </dependency> <!-- 添加spring-tx包 --> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-tx</artifactId> <version>...RELEASE</version> </dependency> <!-- 添加spring-jdbc包 --> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-jdbc</artifactId> <version>...RELEASE</version> </dependency> <!-- 为了方便进行单元测试,添加spring-test包 --> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-test</artifactId> <version>...RELEASE</version> </dependency> <!--添加spring-web包 --> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-web</artifactId> <version>...RELEASE</version> </dependency> <!--添加aspectjweaver包 --> <dependency> <groupId>org.aspectj</groupId> <artifactId>aspectjweaver</artifactId> <version>..</version> </dependency> <!-- 添加mybatis的核心包 --> <dependency> <groupId>org.mybatis</groupId> <artifactId>mybatis</artifactId> <version>..</version> </dependency> <!-- 添加mybatis与Spring整合的核心包 --> <dependency> <groupId>org.mybatis</groupId> <artifactId>mybatis-spring</artifactId> <version>..</version> </dependency> <!-- 添加servlet.核心包 --> <dependency> <groupId>javax.servlet</groupId> <artifactId>javax.servlet-api</artifactId> <version>..</version> </dependency> <dependency> <groupId>javax.servlet.jsp</groupId> <artifactId>javax.servlet.jsp-api</artifactId> <version>..-b</version> </dependency> <!-- jstl --> <dependency> <groupId>javax.servlet</groupId> <artifactId>jstl</artifactId> <version>.</version> </dependency> <!-- 添加mysql驱动包 --> <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> <version>..</version> </dependency> <!-- 添加druid连接池包 --> <dependency> <groupId>com.alibaba</groupId> <artifactId>druid</artifactId> <version>..</version> </dependency> <!-- 添加junit单元测试包 --> <dependency> <groupId>junit</groupId> <artifactId>junit</artifactId> <version>.</version> <scope>test</scope> </dependency> </dependencies> <build> <finalName>spring-mybatis</finalName> </build> </project>
driverClassName=com.mysql.jdbc.Driver validationQuery=SELECT 1 jdbc_url=jdbc:mysql://localhost:3306/spring4_mybatis3?useUnicode=true&characterEncoding=UTF-8&zeroDateTimeBehavior=convertToNull jdbc_username=root jdbc_password=XDP
<?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-3.0.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd"> <!-- 引入dbconfig.properties属性文件 --> <context:property-placeholder location="classpath:dbconfig.properties" /> <!-- 自动扫描(自动注入),扫描me.gacl.service这个包以及它的子包的所有使用@Service注解标注的类 --> <context:component-scan base-package="me.gacl.service" /> </beans>
<?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:tx="http://www.springframework.org/schema/tx" xmlns:aop="http://www.springframework.org/schema/aop" xsi:schemaLocation="
http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
http://www.springframework.org/schema/tx
http://www.springframework.org/schema/tx/spring-tx-3.0.xsd
http://www.springframework.org/schema/aop
http://www.springframework.org/schema/aop/spring-aop-3.0.xsd
">
<!-- JNDI方式配置数据源 -->
<!-- <bean id="dataSource" class="org.springframework.jndi.JndiObjectFactoryBean"> <property name="jndiName" value="${jndiName}"></property> </bean> -->
<!-- ========================================配置数据源========================================= -->
<!-- 配置数据源,使用的是alibaba的Druid(德鲁伊)数据源 -->
<bean name="dataSource" class="com.alibaba.druid.pool.DruidDataSource" init-method="init" destroy-method="close">
<property name="url" value="${jdbc_url}" />
<property name="username" value="${jdbc_username}" />
<property name="password" value="${jdbc_password}" />
<!-- 初始化连接大小 -->
<property name="initialSize" value="0" />
<!-- 连接池最大使用连接数量 -->
<property name="maxActive" value="20" />
<!-- 连接池最大空闲 -->
<property name="maxIdle" value="20" />
<!-- 连接池最小空闲 -->
<property name="minIdle" value="0" />
<!-- 获取连接最大等待时间 -->
<property name="maxWait" value="60000" />
<!--
<property name="poolPreparedStatements" value="true" />
<property name="maxPoolPreparedStatementPerConnectionSize" value="33" />
-->
<property name="validationQuery" value="${validationQuery}" />
<property name="testOnBorrow" value="false" />
<property name="testOnReturn" value="false" />
<property name="testWhileIdle" value="true" />
<!-- 配置间隔多久才进行一次检测,检测需要关闭的空闲连接,单位是毫秒 -->
<property name="timeBetweenEvictionRunsMillis" value="60000" />
<!-- 配置一个连接在池中最小生存的时间,单位是毫秒 -->
<property name="minEvictableIdleTimeMillis" value="25200000" />
<!-- 打开removeAbandoned功能 -->
<property name="removeAbandoned" value="true" />
<!-- 1800秒,也就是30分钟 -->
<property name="removeAbandonedTimeout" value="1800" />
<!-- 关闭abanded连接时输出错误日志 -->
<property name="logAbandoned" value="true" />
<!-- 监控数据库 -->
<!-- <property name="filters" value="stat" /> -->
<property name="filters" value="mergeStat" />
</bean>
<!-- ========================================分隔线========================================= -->
<!-- ========================================针对myBatis的配置项============================== -->
<!-- 配置sqlSessionFactory -->
<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
<!-- 实例化sqlSessionFactory时需要使用上述配置好的数据源以及SQL映射文件 -->
<property name="dataSource" ref="dataSource" />
<!-- 自动扫描me/gacl/mapping/目录下的所有SQL映射的xml文件, 省掉Configuration.xml里的手工配置
value="classpath:me/gacl/mapping/*.xml"指的是classpath(类路径)下me.gacl.mapping包中的所有xml文件
UserMapper.xml位于me.gacl.mapping包下,这样UserMapper.xml就可以被自动扫描
-->
<property name="mapperLocations" value="classpath:me/gacl/mapping/*.xml" />
</bean>
<!-- 配置扫描器 -->
<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
<!-- 扫描me.gacl.dao这个包以及它的子包下的所有映射接口类 -->
<property name="basePackage" value="me.gacl.dao" />
<property name="sqlSessionFactoryBeanName" value="sqlSessionFactory" />
</bean>
<!-- ========================================分隔线========================================= -->
<!-- 配置Spring的事务管理器 -->
<bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
<property name="dataSource" ref="dataSource" />
</bean>
<!-- 注解方式配置事物 -->
<!-- <tx:annotation-driven transaction-manager="transactionManager" /> -->
<!-- 拦截器方式配置事物 -->
<tx:advice id="transactionAdvice" transaction-manager="transactionManager">
<tx:attributes>
<tx:method name="add*" propagation="REQUIRED" />
<tx:method name="append*" propagation="REQUIRED" />
<tx:method name="insert*" propagation="REQUIRED" />
<tx:method name="save*" propagation="REQUIRED" />
<tx:method name="update*" propagation="REQUIRED" />
<tx:method name="modify*" propagation="REQUIRED" />
<tx:method name="edit*" propagation="REQUIRED" />
<tx:method name="delete*" propagation="REQUIRED" />
<tx:method name="remove*" propagation="REQUIRED" />
<tx:method name="repair" propagation="REQUIRED" />
<tx:method name="delAndRepair" propagation="REQUIRED" />
<tx:method name="get*" propagation="SUPPORTS" />
<tx:method name="find*" propagation="SUPPORTS" />
<tx:method name="load*" propagation="SUPPORTS" />
<tx:method name="search*" propagation="SUPPORTS" />
<tx:method name="datagrid*" propagation="SUPPORTS" />
<tx:method name="*" propagation="SUPPORTS" />
</tx:attributes>
</tx:advice>
<aop:config>
<aop:pointcut id="transactionPointcut" expression="execution(* me.gacl.service..*Impl.*(..))" />
<aop:advisor pointcut-ref="transactionPointcut" advice-ref="transactionAdvice" />
</aop:config>
<!-- 配置druid监控spring jdbc -->
<bean id="druid-stat-interceptor" class="com.alibaba.druid.support.spring.stat.DruidStatInterceptor">
</bean>
<bean id="druid-stat-pointcut" class="org.springframework.aop.support.JdkRegexpMethodPointcut" scope="prototype">
<property name="patterns">
<list>
<value>me.gacl.service.*</value>
</list>
</property>
</bean>
<aop:config>
<aop:advisor advice-ref="druid-stat-interceptor" pointcut-ref="druid-stat-pointcut" />
</aop:config>
</beans>
package me.gacl.service;
import me.gacl.domain.User;
public interface UserServiceI {
/**
* 添加用户
* @param user
*/
void addUser(User user);
/**
* 根据用户id获取用户
* @param userId
* @return
*/
User getUserById(String userId);
}
package me.gacl.service.impl;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import me.gacl.dao.UserMapper;
import me.gacl.domain.User;
import me.gacl.service.UserServiceI;
/**
* @author gacl
* 使用@Service注解将UserServiceImpl类标注为一个service
* service的id是userService
*/
@Service("userService")
public class UserServiceImpl implements UserServiceI {
/**
* 使用@Autowired注解标注userMapper变量,
* 当需要使用UserMapper时,Spring就会自动注入UserMapper
*/
@Autowired
private UserMapper userMapper;//注入dao
@Override
public void addUser(User user) {
userMapper.insert(user);
}
@Override
public User getUserById(String userId) {
return userMapper.selectByPrimaryKey(userId);
}
}
package me.gacl.test;
import java.util.Date;
import java.util.UUID;
import me.gacl.domain.User;
import me.gacl.service.UserServiceI;
//import me.gacl.service.UserServiceI;
import org.junit.Before;
import org.junit.Test;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
public class MyBatisTest {
private UserServiceI userService;
/**
* 这个before方法在所有的测试方法之前执行,并且只执行一次
* 所有做Junit单元测试时一些初始化工作可以在这个方法里面进行
* 比如在before方法里面初始化ApplicationContext和userService
*/
@Before
public void before(){
//使用"spring.xml"和"spring-mybatis.xml"这两个配置文件创建Spring上下文
ApplicationContext ac = new ClassPathXmlApplicationContext(new String[]{"spring.xml","spring-mybatis.xml"});
//从Spring容器中根据bean的id取出我们要使用的userService对象
userService = (UserServiceI) ac.getBean("userService");
}
@Test
public void testAddUser(){
//ApplicationContext ac = new ClassPathXmlApplicationContext(new String[]{"spring.xml","spring-mybatis.xml"});
//UserServiceI userService = (UserServiceI) ac.getBean("userService");
User user = new User();
user.setUserId(UUID.randomUUID().toString().replaceAll("-", ""));
user.setUserName("白虎神皇xdp");
user.setUserBirthday(new Date());
user.setUserSalary(D);
userService.addUser(user);
}
}
package me.gacl.test;
import java.util.Date;
import java.util.UUID;
import me.gacl.domain.User;
import me.gacl.service.UserServiceI;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit.SpringJUnitClassRunner;
@RunWith(SpringJUnitClassRunner.class)
//配置了@ContextConfiguration注解并使用该注解的locations属性指明spring和配置文件之后,
@ContextConfiguration(locations = {"classpath:spring.xml", "classpath:spring-mybatis.xml" })
public class MyBatisTestBySpringTestFramework {
//注入userService
@Autowired
private UserServiceI userService;
@Test
public void testAddUser(){
User user = new User();
user.setUserId(UUID.randomUUID().toString().replaceAll("-", ""));
user.setUserName("xdp_gacl_白虎神皇");
user.setUserBirthday(new Date());
user.setUserSalary(D);
userService.addUser(user);
}
@Test
public void testGetUserById(){
String userId = "fbcebfdada";
User user = userService.getUserById(userId);
System.out.println(user.getUserName());
}
}
<?xml version="1.0" encoding="UTF-8"?> <web-app xmlns="http://java.sun.com/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" version="3.0"> <welcome-file-list> <welcome-file>index.jsp</welcome-file> </welcome-file-list> <listener> <description>Spring监听器</description> <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class> </listener> <!-- ContextLoaderListener初始化Spring上下文时需要使用到的contextConfigLocation参数 --> <context-param> <param-name>contextConfigLocation</param-name> <!-- 配置spring.xml和spring-mybatis.xml这两个配置文件的位置,固定写法 --> <param-value>classpath:spring.xml,classpath:spring-mybatis.xml</param-value> </context-param> </web-app>
package me.gacl.dao;
import java.util.List;
import me.gacl.domain.User;
public interface UserMapper {
int deleteByPrimaryKey(String userId);
int insert(User record);
int insertSelective(User record);
User selectByPrimaryKey(String userId);
int updateByPrimaryKeySelective(User record);
int updateByPrimaryKey(User record);
/**获取所有用户信息
* @return List<User>
*/
List<User> getAllUser();
}
<?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" >
<mapper namespace="me.gacl.dao.UserMapper" >
<resultMap id="BaseResultMap" type="me.gacl.domain.User" >
<id column="user_id" property="userId" jdbcType="CHAR" />
<result column="user_name" property="userName" jdbcType="VARCHAR" />
<result column="user_birthday" property="userBirthday" jdbcType="DATE" />
<result column="user_salary" property="userSalary" jdbcType="DOUBLE" />
</resultMap>
<sql id="Base_Column_List" >
user_id, user_name, user_birthday, user_salary
</sql>
<select id="selectByPrimaryKey" resultMap="BaseResultMap" parameterType="java.lang.String" >
select
<include refid="Base_Column_List" />
from t_user
where user_id = #{userId,jdbcType=CHAR}
</select>
<delete id="deleteByPrimaryKey" parameterType="java.lang.String" >
delete from t_user
where user_id = #{userId,jdbcType=CHAR}
</delete>
<insert id="insert" parameterType="me.gacl.domain.User" >
insert into t_user (user_id, user_name, user_birthday,
user_salary)
values (#{userId,jdbcType=CHAR}, #{userName,jdbcType=VARCHAR}, #{userBirthday,jdbcType=DATE},
#{userSalary,jdbcType=DOUBLE})
</insert>
<insert id="insertSelective" parameterType="me.gacl.domain.User" >
insert into t_user
<trim prefix="(" suffix=")" suffixOverrides="," >
<if test="userId != null" >
user_id,
</if>
<if test="userName != null" >
user_name,
</if>
<if test="userBirthday != null" >
user_birthday,
</if>
<if test="userSalary != null" >
user_salary,
</if>
</trim>
<trim prefix="values (" suffix=")" suffixOverrides="," >
<if test="userId != null" >
#{userId,jdbcType=CHAR},
</if>
<if test="userName != null" >
#{userName,jdbcType=VARCHAR},
</if>
<if test="userBirthday != null" >
#{userBirthday,jdbcType=DATE},
</if>
<if test="userSalary != null" >
#{userSalary,jdbcType=DOUBLE},
</if>
</trim>
</insert>
<update id="updateByPrimaryKeySelective" parameterType="me.gacl.domain.User" >
update t_user
<set >
<if test="userName != null" >
user_name = #{userName,jdbcType=VARCHAR},
</if>
<if test="userBirthday != null" >
user_birthday = #{userBirthday,jdbcType=DATE},
</if>
<if test="userSalary != null" >
user_salary = #{userSalary,jdbcType=DOUBLE},
</if>
</set>
where user_id = #{userId,jdbcType=CHAR}
</update>
<update id="updateByPrimaryKey" parameterType="me.gacl.domain.User" >
update t_user
set user_name = #{userName,jdbcType=VARCHAR},
user_birthday = #{userBirthday,jdbcType=DATE},
user_salary = #{userSalary,jdbcType=DOUBLE}
where user_id = #{userId,jdbcType=CHAR}
</update>
<!-- ==============以下内容是根据自身业务扩展的内容======================= -->
<!-- select标签的id属性与UserMapper接口中定义的getAllUser方法要一模一样 -->
<select id="getAllUser" resultMap="BaseResultMap">
select user_id, user_name, user_birthday, user_salary from t_user
</select>
</mapper>
package me.gacl.service;
import java.util.List;
import me.gacl.domain.User;
public interface UserServiceI {
/**
* 添加用户
* @param user
*/
void addUser(User user);
/**
* 根据用户id获取用户
* @param userId
* @return
*/
User getUserById(String userId);
/**获取所有用户信息
* @return List<User>
*/
List<User> getAllUser();
}
package me.gacl.service.impl;
import java.util.List;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import me.gacl.dao.UserMapper;
import me.gacl.domain.User;
import me.gacl.service.UserServiceI;
/**
* @author gacl
* 使用@Service注解将UserServiceImpl类标注为一个service
* service的id是userService
*/
@Service("userService")
public class UserServiceImpl implements UserServiceI {
/**
* 使用@Autowired注解标注userMapper变量,
* 当需要使用UserMapper时,Spring就会自动注入UserMapper
*/
@Autowired
private UserMapper userMapper;//注入dao
@Override
public void addUser(User user) {
userMapper.insert(user);
}
@Override
public User getUserById(String userId) {
return userMapper.selectByPrimaryKey(userId);
}
@Override
public List<User> getAllUser() {
return userMapper.getAllUser();
}
}
package me.gacl.web.controller;
import java.io.IOException;
import java.util.List;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.springframework.context.ApplicationContext;
import org.springframework.web.context.support.WebApplicationContextUtils;
import me.gacl.domain.User;
import me.gacl.service.UserServiceI;
/**
* @author gacl
* @WebServlet是Servlet.提供的注解,目的是将一个继承了HttpServlet类的普通java类标注为一个Servlet
* UserServlet使用了@WebServlet标注之后,就不需要在web.xml中配置了
*/
@WebServlet("/UserServlet")
public class UserServlet extends HttpServlet {
//处理业务逻辑的userService
private UserServiceI userService;
public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
//获取所有的用户信息
List<User> lstUsers = userService.getAllUser();
request.setAttribute("lstUsers", lstUsers);
request.getRequestDispatcher("/index.jsp").forward(request, response);
}
public void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
this.doGet(request, response);
}
public void init() throws ServletException {
//在Servlet初始化时获取Spring上下文对象(ApplicationContext)
ApplicationContext ac = WebApplicationContextUtils.getWebApplicationContext(this.getServletContext());
//从ApplicationContext中获取userService
userService = (UserServiceI) ac.getBean("userService");
}
}
<%@ page language="java" pageEncoding="UTF-8"%>
<%--引入JSTL核心标签库 --%>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core"%>
<!DOCTYPE html>
<html>
<head>
<title>显示用户信息</title>
<style type="text/css">
table,td{
border: 1px solid;
border-collapse: collapse;
}
</style>
</head>
<body>
<table>
<tr>
<td>用户ID</td>
<td>用户名</td>
<td>用户生日</td>
<td>工资</td>
</tr>
<%--遍历lstUsers集合中的User对象 --%>
<c:forEach var="user" items="${lstUsers}">
<tr>
<td>${user.userId}</td>
<td>${user.userName}</td>
<td>${user.userBirthday}</td>
<td>${user.userSalary}</td>
</tr>
</c:forEach>
</table>
</body>
</html>
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