MyBatisPartA

（正在补充）

1.从第一个程序开始，通过mybatis实现数据库表内容的增删改查

　　（源码zip包）

　　1.0准备工作

　　　　建数据库mybatis，在其中创建表sql语句如下：

　　 
SET FOREIGN_KEY_CHECKS=0;

-- ----------------------------
-- Table structure for `orders`
-- ----------------------------
DROP TABLE IF EXISTS `orders`;
CREATE TABLE `orders` (
  `id` INT(11) NOT NULL AUTO_INCREMENT,
  `user_id` INT(11) NOT NULL COMMENT '下单用户id',
  `number` VARCHAR(32) NOT NULL COMMENT '订单号',
  `createtime` DATETIME NOT NULL COMMENT '创建订单时间',
  `note` VARCHAR(100) DEFAULT NULL COMMENT '备注',
  PRIMARY KEY (`id`),
  KEY `FK_orders_1` (`user_id`),
  CONSTRAINT `FK_orders_id` FOREIGN KEY (`user_id`) REFERENCES `user` (`id`) ON DELETE NO ACTION ON UPDATE NO ACTION
) ENGINE=INNODB AUTO_INCREMENT=6 DEFAULT CHARSET=utf8;

-- ----------------------------
-- Records of orders
-- ----------------------------
INSERT INTO `orders` VALUES ('3', '1', '1000010', '2015-02-04 13:22:35', NULL);
INSERT INTO `orders` VALUES ('4', '1', '1000011', '2015-02-03 13:22:41', NULL);
INSERT INTO `orders` VALUES ('5', '10', '1000012', '2015-02-12 16:13:23', NULL);

-- ----------------------------
-- Table structure for `user`
-- ----------------------------
DROP TABLE IF EXISTS `user`;
CREATE TABLE `user` (
  `id` INT(11) NOT NULL AUTO_INCREMENT,
  `username` VARCHAR(32) NOT NULL COMMENT '用户名称',
  `birthday` DATE DEFAULT NULL COMMENT '生日',
  `sex` CHAR(1) DEFAULT NULL COMMENT '性别',
  `address` VARCHAR(256) DEFAULT NULL COMMENT '地址',
  PRIMARY KEY (`id`)
) ENGINE=INNODB AUTO_INCREMENT=27 DEFAULT CHARSET=utf8;

-- ----------------------------
-- Records of user
-- ----------------------------
INSERT INTO `user` VALUES ('1', '王五', NULL, '2', NULL);
INSERT INTO `user` VALUES ('10', '张三', '2014-07-10', '1', '北京市');
INSERT INTO `user` VALUES ('16', '张小明', NULL, '1', '河南郑州');
INSERT INTO `user` VALUES ('22', '陈小明', NULL, '1', '河南郑州');
INSERT INTO `user` VALUES ('24', '张三丰', NULL, '1', '河南郑州');
INSERT INTO `user` VALUES ('25', '陈小明', NULL, '1', '河南郑州');
INSERT INTO `user` VALUES ('26', '王五', NULL, NULL, NULL);
View Code

　　1.1新建java项目(mytatis-a1)

　　　　创建lib文件夹，加入mybaties核心包、依赖包、数据库包（整合包点我下载），build to path

　　　　创建config资源文件，放置配置文件

　　　　　　config/创建sqlMapConfig.xml(核心配置文件)

　　　　　　config/创建log4j.properties(日志)

　　　　　　config/创建sqlmap/user.xml(写sql语句)

　　　　创建包com.mybatis.pojo/下根据数据库表创建User.java

　　　　　　　com.mybatis.test/MybatiesTest.java

　　　　结构图如下：

　　　　

　　　　填写代码：

　　　　sqlMapConfig.xml　　

　　　　 
<?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>
    <!-- 和spring整合后 environments配置将废除 -->
    <environments default="development">
        <environment id="development">
            <!-- 使用jdbc事务管理 -->
            <transactionManager type="JDBC" />
            <!-- 数据库连接池 -->
            <dataSource type="POOLED">
                <property name="driver" value="com.mysql.jdbc.Driver" />
                <property name="url"
                    value="jdbc:mysql://localhost:3306/mybatis?characterEncoding=utf-8" />
                <property name="username" value="root" />
                <property name="password" value="root" />
            </dataSource>
        </environment>
    </environments>
    <mappers>
        <mapper resource="sqlmap/user.xml"/>
    </mappers>
    

</configuration>
View Code

　　　　log4j.properites

　　　　 
# Global logging configuration
log4j.rootLogger=DEBUG, stdout
# Console output...
log4j.appender.stdout=org.apache.log4j.ConsoleAppender
log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
log4j.appender.stdout.layout.ConversionPattern=%5p [%t] - %m%n
View Code

　　　　user.xml

　　　　 
<?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">
<!-- namespace：命名空间，用于隔离sql，还有一个很重要的作用，后面会讲 -->
<mapper namespace="test">
    <select id="queryUserById" parameterType="Integer" resultType="com.mybaties.pojo.User">
        select * from user where id = #{v}
    </select>
</mapper>
View Code

　　　　User.java　

　　　　 
package com.mybaties.pojo;

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

public class User implements Serializable {
    /**
     * 
     */
    private static final long serialVersionUID = 1L;
    private Integer id;
    private String username;// 用户姓名
    private String sex;// 性别
    private Date birthday;// 生日
    private String address;// 地址


    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 getSex() {
        return sex;
    }
    public void setSex(String sex) {
        this.sex = sex;
    }
    public Date getBirthday() {
        return birthday;
    }
    public void setBirthday(Date birthday) {
        this.birthday = birthday;
    }
    public String getAddress() {
        return address;
    }
    public void setAddress(String address) {
        this.address = address;
    }

    public String toString() {
        return "User [id=" + id + ", username=" + username + ", sex=" + sex
                + ", birthday=" + birthday + ", address=" + address + "]";
    }


}
View Code

　　　　MybatisTest.java　

　　　　 
package com.mybaties.test;


import java.io.InputStream;

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.Before;
import org.junit.Test;

public class MybatiesTest {
    private SqlSessionFactory factory;
    
    @Before
    public void init() throws Exception{
        InputStream in = 
                Resources.getResourceAsStream("sqlMapConfig.xml");
        SqlSessionFactoryBuilder builder = new SqlSessionFactoryBuilder();
        this.factory = builder.build(in);
    }

    @Test
    public void testQueryUserById(){
        SqlSession session = factory.openSession();
        Object user = session.selectOne("test.queryUserById", 37);
        System.out.println(user);

    }
}
View Code

　　　　MybatiesTest.java

　　　　 
package com.mybaties.test;

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

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.Test;

public class MybatiesTest1 {

    @Test
    public void testQueryUserById() throws IOException{
        InputStream in = 
                Resources.getResourceAsStream("sqlMapConfig.xml");
        SqlSessionFactory factory = new SqlSessionFactoryBuilder().build(in);
        SqlSession session = factory.openSession();
        Object user = session.selectOne("test.queryUserById", 37);
        System.out.println(user);

    }
}
View Code

　　　　junit:MybatiesTest中testQueryUserById结果如图：

　　　　

　　　　　　

　　　　

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原文地址：https://www.cnblogs.com/BBack/p/9016962.html