day02_eesy_01mybatisCRUD
<?xml version="1.0" encoding="UTF-8"?>
<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/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.itheima</groupId>
<artifactId>day02_eesy_01mybatisCRUD</artifactId>
<version>1.0-SNAPSHOT</version>
<packaging>jar</packaging>
<dependencies>
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis</artifactId>
<version>3.4.5</version>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>5.1.6</version>
</dependency>
<dependency>
<groupId>log4j</groupId>
<artifactId>log4j</artifactId>
<version>1.2.12</version>
</dependency>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.10</version>
</dependency>
</dependencies>
</project> <?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>
<!-- 配置properties
可以在标签内部配置连接数据库的信息。也可以通过属性引用外部配置文件信息
resource属性： 常用的
用于指定配置文件的位置，是按照类路径的写法来写，并且必须存在于类路径下。
url属性：
是要求按照Url的写法来写地址
URL：Uniform Resource Locator 统一资源定位符。它是可以唯一标识一个资源的位置。
它的写法：
http://localhost:8080/mybatisserver/demo1Servlet
协议 主机 端口 URI
URI:Uniform Resource Identifier 统一资源标识符。它是在应用中可以唯一定位一个资源的。
-->
<!-- <properties url="file:///E:/IdeaProjects/javaEE/day02_eesy_01mybatisCRUD/src/main/resources/jdbcConfig.properties">-->
<properties resource="jdbcConfig.properties">
<!-- <property name="driver" value="com.mysql.jdbc.Driver"></property>
<property name="url" value="jdbc:mysql://localhost:3306/eesy_mybatis"></property>
<property name="username" value="root"></property>
<property name="password" value="root"></property>-->
</properties>
<!--使用typeAliases配置别名，它只能配置domain中类的别名 -->
<typeAliases>
<!--typeAlias用于配置别名。type属性指定的是实体类全限定类名。alias属性指定别名，当指定了别名就再区分大小写
<typeAlias type="com.itheima.domain.User" alias="user"></typeAlias>-->
<!-- 用于指定要配置别名的包，当指定之后，该包下的实体类都会注册别名，并且类名就是别名，不再区分大小写-->
<package name="com.itheima.domain"></package>
</typeAliases>
<!--配置环境-->
<environments default="mysql">
<!-- 配置mysql的环境-->
<environment id="mysql">
<!-- 配置事务 -->
<transactionManager type="JDBC"></transactionManager>
<!--配置连接池-->
<dataSource type="POOLED">
<property name="driver" value="${jdbc.driver}"></property>
<property name="url" value="${jdbc.url}"></property>
<property name="username" value="${jdbc.username}"></property>
<property name="password" value="${jdbc.password}"></property>
</dataSource>
</environment>
</environments>
<!-- 配置映射文件的位置 -->
<mappers>
<!--<mapper resource="com/itheima/dao/IUserDao.xml"></mapper>-->
<!-- package标签是用于指定dao接口所在的包,当指定了之后就不需要在写mapper以及resource或者class了 -->
<package name="com.itheima.dao"></package>
</mappers>
</configuration> package com.itheima.domain;
import java.io.Serializable;
import java.util.Date;
public class User implements Serializable {
private Integer userId;
private String userName;
private String userAddress;
private String UserSex;
private Date UserBirthday;
public Integer getUserId() {
return userId;
}
public void setUserId(Integer userId) {
this.userId = userId;
}
public String getUserName() {
return userName;
}
public void setUserName(String userName) {
this.userName = userName;
}
public String getUserAddress() {
return userAddress;
}
public void setUserAddress(String userAddress) {
this.userAddress = userAddress;
}
public String getUserSex() {
return UserSex;
}
public void setUserSex(String userSex) {
UserSex = userSex;
}
public Date getUserBirthday() {
return UserBirthday;
}
public void setUserBirthday(Date userBirthday) {
UserBirthday = userBirthday;
}
@Override
public String toString() {
return "User{" +
"userId=" + userId +
", userName='" + userName + '\'' +
", userAddress='" + userAddress + '\'' +
", UserSex='" + UserSex + '\'' +
", UserBirthday=" + UserBirthday +
'}';
}
}
package com.itheima.domain;
public class QueryVo {
private User user;
public User getUser() {
return user;
}
public void setUser(User user) {
this.user = user;
}
}
package com.itheima.dao;
import com.itheima.domain.QueryVo;
import com.itheima.domain.User;
import java.util.List;
/**
* 用户的持久层接口
*/
public interface IUserDao {
/**
* 查询所有用户
* @return
*/
List<User> findAll();
/**
* 保存用户
* @param user
*/
void saveUser(User user);
/**
* 更新用户
* @param user
*/
void updateUser(User user);
/**
* 根据id删除用户
* @param userId
*/
void deleteUser(Integer userId);
/**
* 根据id查询用户信息
* @param userId
* @return
*/
User findById(Integer userId);
/**
* 根据名称模糊查询用户信息
* @param username
* @return
*/
List<User> findByName(String username);
/**
* 查询总用户数
* @return
*/
int findTotal();
/**
* 根据quertVo中的条件查询用户
* @param vo
* @return
*/
List<User> findUserByVo(QueryVo vo);
} <?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="com.itheima.dao.IUserDao">
<!--配置 查询结果的列名和实体类的属性名的对应关系-->
<resultMap id="userMap" type="com.itheima.domain.User">
<!--主键字段的对应-->
<id property="userId" column="id"></id>
<!--非主键字段的对应-->
<result property="userName" column="username"></result>
<result property="userAddress" column="address"></result>
<result property="userSex" column="sex"></result>
<result property="userBirthday" column="birthday"></result>
</resultMap>
<!--查询所有-->
<select id="findAll" resultMap="userMap">
select * from user
</select>
<!--保存用户-->
<insert id="saveUser" parameterType="com.itheima.domain.User">
<!--配置插入操作后，获取插入数据的id-->
<selectKey keyProperty="userId" keyColumn="id" resultType="int" order="AFTER">
select last_insert_id()
</selectKey>
insert into user(username,address,sex,birthday) values(#{userName},#{userAddress},#{userSex},#{userBirthday})
</insert>
<!--更新用户-->
<update id="updateUser" parameterType="com.itheima.domain.User">
update user set username = #{userName},address = #{userAddress},sex = #{userSex},birthday = #{userBirthday} where id = #{userId}
</update>
<!--删除用户-->
<delete id="deleteUser" parameterType="java.lang.Integer">
delete from user where id = #{userId}
</delete>
<!--根据id查询用户-->
<select id="findById" parameterType="INT" resultMap="userMap">
select * from user where id = #{id}
</select>
<!--根据名称模糊查询-->
<select id="findByName" parameterType="string" resultMap="userMap">
select * from user where username like #{name}
<!--select * from user where username like '%${value}%'-->
</select>
<!--获取用户的总记录条数-->
<select id="findTotal" resultType="int">
select count(id) from user
</select>
<!-- 根据queryVo的条件查询用户 -->
<select id="findUserByVo" parameterType="com.itheima.domain.QueryVo" resultMap="userMap">
select * from user where username like #{user.userName}
</select>
</mapper> package com.itheima.test;
import com.itheima.dao.IUserDao;
import com.itheima.domain.QueryVo;
import com.itheima.domain.User;
import org.apache.ibatis.io.Resources;
import org.apache.ibatis.session.SqlSession;
import org.apache.ibatis.session.SqlSessionFactory;
import org.apache.ibatis.session.SqlSessionFactoryBuilder;
import org.junit.After;
import org.junit.Before;
import org.junit.Test;
import java.io.InputStream;
import java.util.Date;
import java.util.List;
/**
* 测试mybatis的crud操作
*/
public class MybatisTest {
private InputStream in;
private SqlSession sqlSession;
private IUserDao userDao;
@Before//用于在测试方法执行之前执行
public void init() throws Exception{
//1.读取配置文件，生成字节输入流
in = Resources.getResourceAsStream("SqlMapConfig.xml");
//2.获取SqlSessionFactory
SqlSessionFactory factory = new SqlSessionFactoryBuilder().build(in);
//3.获取SqlSession对象
sqlSession = factory.openSession();
//4.获取dao代理对象
userDao = sqlSession.getMapper(IUserDao.class);
}
@After//用于在测试方法执行之后执行
public void destory() throws Exception{
//提交事务
sqlSession.commit();
//6.释放资源
sqlSession.close();
in.close();
}
/**
* 测试查询所有
*/
@Test
public void testFindAll(){
//5.执行查询所有方法
List<User> users = userDao.findAll();
for(User user : users){
System.out.println(user);
}
}
/**
* 测试保存操作
*/
@Test
public void testSave(){
User user = new User();
user.setUserName("modify User property");
user.setUserAddress("北京市顺义区");
user.setUserSex("男");
user.setUserBirthday(new Date());
System.out.println("保存操作之前："+user);
//5.执行保存方法
userDao.saveUser(user);
System.out.println("保存操作之后："+user);
}
/**
* 测试更新操作
*/
@Test
public void testUpdate(){
User user = new User();
user.setUserId(50);
user.setUserName("mybastis update user");
user.setUserAddress("北京市顺义区");
user.setUserSex("男");
user.setUserBirthday(new Date());
//5.执行保存方法
userDao.updateUser(user);
}
/**
* 测试删除操作
*/
@Test
public void testDelete(){
//5.执行删除方法
userDao.deleteUser(53);
}
/**
* 测试删除操作
*/
@Test
public void testFindOne(){
//5.执行查询一个方法
User user = userDao.findById(50);
System.out.println(user);
}
/**
* 测试模糊查询操作
*/
@Test
public void testFindByName(){
//5.执行查询一个方法
List<User> users = userDao.findByName("%王%");
// List<User> users = userDao.findByName("王");
for(User user : users){
System.out.println(user);
}
}
/**
* 测试查询总记录条数
*/
@Test
public void testFindTotal(){
//5.执行查询一个方法
int count = userDao.findTotal();
System.out.println(count);
}
/**
* 测试使用QueryVo作为查询条件
*/
@Test
public void testFindByVo(){
QueryVo vo = new QueryVo();
User user = new User();
user.setUserName("%王%");
vo.setUser(user);
//5.执行查询一个方法
List<User> users = userDao.findUserByVo(vo);
for(User u : users){
System.out.println(u);
}
}
} jdbc.driver=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql://localhost:3306/eesy_mybatis
jdbc.username=root
jdbc.password=root
day02_eesy_02mybatisDAO
<?xml version="1.0" encoding="UTF-8"?>
<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/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.itheima</groupId>
<artifactId>day02_eesy_02mybatisDAO</artifactId>
<version>1.0-SNAPSHOT</version>
<packaging>jar</packaging>
<dependencies>
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis</artifactId>
<version>3.4.5</version>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>5.1.6</version>
</dependency>
<dependency>
<groupId>log4j</groupId>
<artifactId>log4j</artifactId>
<version>1.2.12</version>
</dependency>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.10</version>
</dependency>
</dependencies>
</project> <?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>
<!--配置环境-->
<environments default="mysql">
<!-- 配置mysql的环境-->
<environment id="mysql">
<!-- 配置事务 -->
<transactionManager type="JDBC"></transactionManager>
<!--配置连接池-->
<dataSource type="POOLED">
<property name="driver" value="com.mysql.jdbc.Driver"></property>
<property name="url" value="jdbc:mysql://localhost:3306/eesy_mybatis"></property>
<property name="username" value="root"></property>
<property name="password" value="root"></property>
</dataSource>
</environment>
</environments>
<!-- 配置映射文件的位置 -->
<mappers>
<mapper resource="com/itheima/dao/IUserDao.xml"></mapper>
</mappers>
</configuration> package com.itheima.domain;
import java.io.Serializable;
import java.util.Date;
public class User implements Serializable {
private Integer id;
private String username;
private String address;
private String sex;
private Date birthday;
public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
public String getUsername() {
return username;
}
public void setUsername(String username) {
this.username = username;
}
public String getAddress() {
return address;
}
public void setAddress(String address) {
this.address = address;
}
public String getSex() {
return sex;
}
public void setSex(String sex) {
this.sex = sex;
}
public Date getBirthday() {
return birthday;
}
public void setBirthday(Date birthday) {
this.birthday = birthday;
}
@Override
public String toString() {
return "User{" +
"id=" + id +
", name='" + username + '\'' +
", address='" + address + '\'' +
", sex='" + sex + '\'' +
", birthday=" + birthday +
'}';
}
} package com.itheima.dao;
import com.itheima.domain.User;
import java.util.List;
/**
* 用户的持久层接口
*/
public interface IUserDao {
/**
* 查询所有用户
* @return
*/
List<User> findAll();
/**
* 保存用户
* @param user
*/
void saveUser(User user);
/**
* 更新用户
* @param user
*/
void updateUser(User user);
/**
* 根据id删除用户
* @param userId
*/
void deleteUser(Integer userId);
/**
* 根据id查询用户信息
* @param userId
* @return
*/
User findById(Integer userId);
/**
* 根据名称模糊查询用户信息
* @param username
* @return
*/
List<User> findByName(String username);
/**
* 查询总用户数
* @return
*/
int findTotal();
} package com.itheima.dao.impl;
import com.itheima.dao.IUserDao;
import com.itheima.domain.User;
import org.apache.ibatis.session.SqlSession;
import org.apache.ibatis.session.SqlSessionFactory;
import java.util.List;
public class UserDaoImpl implements IUserDao {
private SqlSessionFactory factory;
public UserDaoImpl(SqlSessionFactory factory){
this.factory = factory;
}
public List<User> findAll() {
//1.根据factory获取sqlSession对象
SqlSession session = factory.openSession();
//2.调用SqlSession中的方法，实现查询列表
List<User> users = session.selectList("com.itheima.dao.IUserDao.findAll");//参数就是能获取配置信息的key
//3.释放资源
session.close();
return users;
}
public void saveUser(User user) {
//1.根据factory获取sqlSession对象
SqlSession session = factory.openSession();
//2.调用SqlSession中的方法，实现保存
session.insert("com.itheima.dao.IUserDao.saveUser",user);
//3.提交事务
session.commit();
//4.释放资源
session.close();
}
public void updateUser(User user) {
//1.根据factory获取sqlSession对象
SqlSession session = factory.openSession();
//2.调用SqlSession中的方法，实现保存
session.update("com.itheima.dao.IUserDao.updateUser",user);
//3.提交事务
session.commit();
//4.释放资源
session.close();
}
public void deleteUser(Integer userId) {
//1.根据factory获取sqlSession对象
SqlSession session = factory.openSession();
//2.调用SqlSession中的方法，实现保存
session.delete("com.itheima.dao.IUserDao.deleteUser",userId);
//3.提交事务
session.commit();
//4.释放资源
session.close();
}
public User findById(Integer userId) {
//1.根据factory获取sqlSession对象
SqlSession session = factory.openSession();
//2.调用SqlSession中的方法，实现查询列表
User user = session.selectOne("com.itheima.dao.IUserDao.findById",userId);//参数就是能获取配置信息的key
//3.释放资源
session.close();
return user;
}
public List<User> findByName(String username) {
//1.根据factory获取sqlSession对象
SqlSession session = factory.openSession();
//2.调用SqlSession中的方法，实现查询列表
List<User> users = session.selectList("com.itheima.dao.IUserDao.findByName",username);//参数就是能获取配置信息的key
//3.释放资源
session.close();
return users;
}
public int findTotal() {
//1.根据factory获取sqlSession对象
SqlSession session = factory.openSession();
//2.调用SqlSession中的方法，实现查询列表
Integer count = session.selectOne("com.itheima.dao.IUserDao.findTotal");//参数就是能获取配置信息的key
//3.释放资源
session.close();
return count;
}
} <?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="com.itheima.dao.IUserDao">
<!--查询所有-->
<select id="findAll" resultType="com.itheima.domain.User">
select * from user
</select>
<!--保存用户-->
<insert id="saveUser" parameterType="com.itheima.domain.User">
<!--配置插入操作后，获取插入数据的id-->
<selectKey keyProperty="id" keyColumn="id" resultType="int" order="AFTER">
select last_insert_id()
</selectKey>
insert into user(username,address,sex,birthday) values(#{username},#{address},#{sex},#{birthday})
</insert>
<!--更新用户-->
<update id="updateUser" parameterType="com.itheima.domain.User">
update user set username = #{username},address = #{address},sex = #{sex},birthday = #{birthday} where id = #{id}
</update>
<!--删除用户-->
<delete id="deleteUser" parameterType="java.lang.Integer">
delete from user where id = #{id}
</delete>
<!--根据id查询用户-->
<select id="findById" parameterType="INT" resultType="com.itheima.domain.User">
select * from user where id = #{id}
</select>
<!--根据名称模糊查询-->
<select id="findByName" parameterType="string" resultType="com.itheima.domain.User">
select * from user where username like #{name}
</select>
<!--获取用户的总记录条数-->
<select id="findTotal" resultType="int">
select count(id) from user
</select>
</mapper> package com.itheima.test;
import com.itheima.dao.IUserDao;
import com.itheima.dao.impl.UserDaoImpl;
import com.itheima.domain.User;
import org.apache.ibatis.io.Resources;
import org.apache.ibatis.session.SqlSession;
import org.apache.ibatis.session.SqlSessionFactory;
import org.apache.ibatis.session.SqlSessionFactoryBuilder;
import org.junit.After;
import org.junit.Before;
import org.junit.Test;
import java.io.InputStream;
import java.util.Date;
import java.util.List;
/**
* 测试mybatis的crud操作
*/
public class MybatisTest {
private InputStream in;
private IUserDao userDao;
@Before//用于在测试方法执行之前执行
public void init() throws Exception{
//1.读取配置文件，生成字节输入流
in = Resources.getResourceAsStream("SqlMapConfig.xml");
//2.获取SqlSessionFactory
SqlSessionFactory factory = new SqlSessionFactoryBuilder().build(in);
//3.使用工厂对象，创建dao对象
userDao = new UserDaoImpl(factory);
}
@After//用于在测试方法执行之后执行
public void destory() throws Exception{
//6.释放资源
in.close();
}
/**
* 测试查询所有
*/
@Test
public void testFindAll(){
//5.执行查询所有方法
List<User> users = userDao.findAll();
for(User user : users){
System.out.println(user);
}
}
/**
* 测试保存操作
*/
@Test
public void testSave(){
User user = new User();
user.setUsername("dao impl user");
user.setAddress("北京市顺义区");
user.setSex("男");
user.setBirthday(new Date());
System.out.println("保存操作之前："+user);
//5.执行保存方法
userDao.saveUser(user);
System.out.println("保存操作之后："+user);
}
/**
* 测试更新操作
*/
@Test
public void testUpdate(){
User user = new User();
user.setId(50);
user.setUsername("mybastis update user");
user.setAddress("北京市顺义区");
user.setSex("男");
user.setBirthday(new Date());
//5.执行保存方法
userDao.updateUser(user);
}
/**
* 测试删除操作
*/
@Test
public void testDelete(){
//5.执行删除方法
userDao.deleteUser(54);
}
/**
* 测试删除操作
*/
@Test
public void testFindOne(){
//5.执行查询一个方法
User user = userDao.findById(50);
System.out.println(user);
}
/**
* 测试模糊查询操作
*/
@Test
public void testFindByName(){
//5.执行查询一个方法
List<User> users = userDao.findByName("%王%");
for(User user : users){
System.out.println(user);
}
}
/**
* 测试查询总记录条数
*/
@Test
public void testFindTotal(){
//5.执行查询一个方法
int count = userDao.findTotal();
System.out.println(count);
}
}
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