MyBatis——封装SqlSessionUtils工具类并测试功能

dart 复制代码

package com.baidu.mybatis.mapper;

import com.baidu.mybatis.pojo.User;

import java.util.List;

public interface ParameterMapper {

    List<User> getAllUser();

}

dart 复制代码

package com.baidu.mybatis.pojo;

public class User {
    private Integer id;
    private String username;
    private String password;
    private Integer age;
    private String sex;
    private String email;


    public User() {
    }

    public User(Integer id, String username, String password, Integer age, String sex, String email) {
        this.id = id;
        this.username = username;
        this.password = password;
        this.age = age;
        this.sex = sex;
        this.email = email;
    }

    /**
     * 获取
     * @return id
     */
    public Integer getId() {
        return id;
    }

    /**
     * 设置
     * @param id
     */
    public void setId(Integer id) {
        this.id = id;
    }

    /**
     * 获取
     * @return username
     */
    public String getUsername() {
        return username;
    }

    /**
     * 设置
     * @param username
     */
    public void setUsername(String username) {
        this.username = username;
    }

    /**
     * 获取
     * @return password
     */
    public String getPassword() {
        return password;
    }

    /**
     * 设置
     * @param password
     */
    public void setPassword(String password) {
        this.password = password;
    }

    /**
     * 获取
     * @return age
     */
    public Integer getAge() {
        return age;
    }

    /**
     * 设置
     * @param age
     */
    public void setAge(Integer age) {
        this.age = age;
    }

    /**
     * 获取
     * @return sex
     */
    public String getSex() {
        return sex;
    }

    /**
     * 设置
     * @param sex
     */
    public void setSex(String sex) {
        this.sex = sex;
    }

    /**
     * 获取
     * @return email
     */
    public String getEmail() {
        return email;
    }

    /**
     * 设置
     * @param email
     */
    public void setEmail(String email) {
        this.email = email;
    }

    public String toString() {
        return "User{id = " + id + ", username = " + username + ", password = " + password + ", age = " + age + ", sex = " + sex + ", email = " + email + "}";
    }
}

dart 复制代码

<?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.baidu.mybatis.mapper.ParameterMapper">

    <select id="getAllUser" resultType="User">
        select * from t_user
    </select>


</mapper>

dart 复制代码

在这里插入代码片

dart 复制代码

package com.baidu.mybatis.utils;

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 java.io.IOException;
import java.io.InputStream;

public class SqlSessionUtils {

    public static SqlSession getSqlSession() {

        SqlSession sqlSession = null;

        try {
            InputStream resourceAsStream = Resources.getResourceAsStream("mybatis-config.xml");
            SqlSessionFactory sqlSessionFactory = new SqlSessionFactoryBuilder().build(resourceAsStream);

             sqlSession = sqlSessionFactory.openSession(true);

        } catch (IOException e) {
            throw new RuntimeException(e);
        }

        return sqlSession;

    }


}

dart 复制代码

package com.baidu.mybatis.test;
import com.baidu.mybatis.mapper.ParameterMapper;
import com.baidu.mybatis.pojo.User;
import com.baidu.mybatis.utils.SqlSessionUtils;
import org.apache.ibatis.session.SqlSession;
import org.junit.Test;
import java.util.List;
public class ParameterMapperTest {

    @Test
    public void testGetAllUser(){

        SqlSession sqlSession = SqlSessionUtils.getSqlSession();

        ParameterMapper mapper = sqlSession.getMapper(ParameterMapper.class);

        List<User> allUser = mapper.getAllUser();

        allUser.forEach(user -> System.out.println(user));
    }

}