Mybatis案例

1.user类

package com.itcast.domin;


import java.io.Serializable;
import java.util.Date;

/**
 * @datetime 2019/11/29
 */
public class User implements Serializable {
    private Integer id;
    private String username;
    private Date birthday;
    private String sex;
    private String address;

    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 Date getBirthday() {
        return birthday;
    }

    public void setBirthday(Date birthday) {
        this.birthday = birthday;
    }

    public String getSex() {
        return sex;
    }

    public void setSex(String sex) {
        this.sex = sex;
    }

    public String getAddress() {
        return address;
    }

    public void setAddress(String address) {
        this.address = address;
    }

    @Override
    public String toString() {
        return "User{" +
                "id=" + id +
                ", username='" + username + '\'' +
                ", birthday=" + birthday +
                ", sex='" + sex + '\'' +
                ", address='" + address + '\'' +
                '}';
    }
}

 

2.QuryVo类

package com.itcast.domin;

import java.util.List;

public class QuryVo {
    private List<Integer> ids;
     private  User user;

    public User getUser() {
        return user;
    }

    public void setUser(User user) {
        this.user = user;
    }

    public List<Integer> getIds() {
        return ids;
    }

    public void setIds(List<Integer> ids) {
        this.ids = ids;
    }
}

 

3.IUserDao接口

package com.itcast.dao;

import com.itcast.domin.QuryVo;
import com.itcast.domin.User;
import org.apache.ibatis.annotations.Select;

import javax.jws.soap.SOAPBinding;
import java.util.List;

/**
 *
 * 用户持久层接口
 */
public interface IUserDao {
    /**
     * 查询所有操作
     * @return
     */
 /*  @Select("select * from user")*/
    List<User> findAll();

    /**
     * 保存用户（插入一个用户记录）
     */
    void saveUser(User user);

    /**
     * 更新用户
     */
    void updateUser(User user);
   /**
    * 删除用户
    */
      void deleteUser(Integer id);
    /**
     * 根据id查询用户
     */
      User findById(int id);
      /**
       * 模糊查询
       */
      List<User> findByName(String username);
    /**
     * 获取用户总记录的条数
     */
    int findByCount();

    /**
     * 根据条件动态查询内容
     * @param user
     * @return
     */
    List<User> findByCondition(User user);

    /**
     * 当id的值是34、45、46时，动态查询用户，SQL语句中对应的是子查询in关键字
     * @param vo
     * @return
     */
    List<User> findByIds(QuryVo vo);

}

4.SqlMapConfig配置文件

<?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">
<!--mybatis的主配置文件 -->
<configuration>
    <!--配置环境-->
<environments default="mysql">
    <!--配置mysql的环境-->
    <environment id="mysql">
        <!--配置事务的类型-->
        <transactionManager type="JDBC"></transactionManager>
         <!--配置数据源（连接池）-->
        <dataSource type="POOLED">
            <!--配置连接数据库的4个基本信息-->
            <property name="driver" value="com.mysql.jdbc.Driver"/>
            <property name="url" value="jdbc:mysql://localhost:3306/eesy"/>
            <property name="username" value="root"/>
            <property name="password" value="123456"/>
        </dataSource>
    </environment>
</environments>
<!--指定映射配置文件的位置，映射配置文件指的是每个dao独立的配置文件-->
    <mappers>
        <mapper resource="com/itcast/dao/IUserDao.xml"/>
    </mappers>
<!--    <mappers>  &lt;!&ndash;全限定类名&ndash;&gt;
        <mapper class="com.itcast.dao.IUserDao"/>
    </mappers>-->
</configuration>

 

5.log4j.propreties配置文件

### 设置###
log4j.rootLogger = debug,stdout,D,E

### 输出信息到控制擡 ###
log4j.appender.stdout = org.apache.log4j.ConsoleAppender
log4j.appender.stdout.Target = System.out
log4j.appender.stdout.layout = org.apache.log4j.PatternLayout
log4j.appender.stdout.layout.ConversionPattern = [%-5p] %d{yyyy-MM-dd HH:mm:ss,SSS} method:%l%n%m%n

### 输出DEBUG 级别以上的日志到=E://logs/error.log ###
log4j.appender.D = org.apache.log4j.DailyRollingFileAppender
log4j.appender.D.File =  C://Users//cs//Desktop/log.log 
log4j.appender.D.Append = true
log4j.appender.D.Threshold = DEBUG 
log4j.appender.D.layout = org.apache.log4j.PatternLayout
log4j.appender.D.layout.ConversionPattern = %-d{yyyy-MM-dd HH:mm:ss}  [ %t:%r ] - [ %p ]  %m%n

### 输出ERROR 级别以上的日志到=E://logs/error.log ###
log4j.appender.E = org.apache.log4j.DailyRollingFileAppender
log4j.appender.E.File = C://Users//cs//Desktop/error.log
log4j.appender.E.Append = true
log4j.appender.E.Threshold = ERROR 
log4j.appender.E.layout = org.apache.log4j.PatternLayout
log4j.appender.E.layout.ConversionPattern = %-d{yyyy-MM-dd HH:mm:ss}  [ %t:%r ] - [ %p ]  %m%n

 

6.MyBatisTest 测试类

package com.itcast.test;

import com.itcast.dao.IUserDao;
import com.itcast.domin.QuryVo;
import com.itcast.domin.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.ArrayList;
import java.util.Date;
import java.util.List;

public class MybatisTset {
    /**
     * 入门案例
     */
    private  InputStream in;
    private  SqlSession session;
    private IUserDao userDao;
    @Before
    public void init() throws Exception{
        //1.读取配置文件
         in= Resources.getResourceAsStream("SqlMapConfig.xml");
        //2.创建SqlSeesionFactory工厂
        SqlSessionFactoryBuilder builder=new SqlSessionFactoryBuilder();
        SqlSessionFactory factory=builder.build(in);
        //3.使用工厂生产SqlSession对象
         session=factory.openSession();
        //4.使用SqlSession 创建Dao接口的代理对象
       userDao=session.getMapper(IUserDao.class);

    }
    @After
public void destory() throws  Exception{
    //6.释放资源
        session.commit();
    session.close();
    in.close();
}
@Test
   public  void  testFindAll(){
        List<User> users=userDao.findAll();
       for (User user:users){
           System.out.println(user);
       }}


    @Test
    public void testSaveUser() {
        User user=new User();
        user.setUsername("saveuser 杨贵妃");
        user.setSex("男");
        user.setAddress("北京市丰台区");
        user.setBirthday(new Date());
        System.out.println(user);
        //5.使用代理对象执行方法
        userDao.saveUser(user);
        session.commit();
        System.out.println(user);
    }

    @Test
    public void testUpateUser() {
        User user=new User();
        user.setId(50);
        user.setUsername("秦始皇");
        user.setSex("男");
        user.setAddress("北京市丰台区");
        user.setBirthday(new Date());

        //5.使用代理对象执行方法
        userDao.updateUser(user);

    }
    @Test
    public void testDeleteUser() {
        //5.使用代理对象执行方法
        userDao.deleteUser(54);
    }

    @Test
    public void testFindById() {
        //5.使用代理对象执行方法
        User user=userDao.findById(50);
        System.out.println(user);
    }
    @Test
    public void testFindByName() {
        //5.使用代理对象执行方法
        List<User> users= userDao.findByName("%王%");
        for(User user:users){
            System.out.println(user);
        }

    }
    @Test
    public void testFindCount() {
        //5.使用代理对象执行方法
        int count = userDao.findByCount();
        System.out.println(count);
    }
//动态查询
    @Test
    public  void testFindByCondition(){
        User user =new User();
        user.setUsername("老王");
        user.setSex("女");
        List<User> cn = userDao.findByCondition(user);
        for (User c: cn){
            System.out.println(c);
        }
    }
//子查询in
//@Test
//public void testFindByIds(){
// List<Integer> list=new ArrayList<Integer>();
// list.add(41);
// list.add(52);
// list.add(47);
//    QuryVo quryVo=new QuryVo();
//    quryVo.setIds(list);
//
//    List<User> cn = userDao.findByIds(quryVo);
//    for (User c: cn){
//        System.out.println(c);
//    }
//}

}