03mybatis-注解方式简单入门实例

1、使用Idea 建立 java 基于maven的项目 jar

2、maven项目的pom.xml
<?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.fz</groupId>
<artifactId>myb01</artifactId>
<packaging>jar</packaging>
<version>1.0</version>
<dependencies>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.12</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis</artifactId>
<version>3.4.4</version>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>5.1.41</version>
</dependency>
</dependencies>

<build>
<finalName>${project.artifactId}</finalName>
<testSourceDirectory>src/test/java</testSourceDirectory>
<sourceDirectory>src/main/java</sourceDirectory>
<!-- 处理无法加载资源配置文件 -->
<resources>
<resource>
<directory>src/main/java</directory>
<includes>
<include>**/*.xml</include>
</includes>
</resource>
<resource>
<directory>src/main/resources</directory>
<includes>
<include>**/*.xml</include>
<include>**/*.properties</include>
</includes>
</resource>
</resources>
</build>
</project>

3、在项目src/main/resources/mybatis-conf.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>
<environments default="development">
<environment id="development">
<transactionManager type="JDBC" />
<dataSource type="POOLED">
<property name="driver" value="com.mysql.jdbc.Driver" />
<property name="url" value="jdbc:mysql://localhost:3306/db?useSSL=true&amp;useUnicode=true&amp;characterEncoding=utf8&amp;zeroDateTimeBehavior=convertToNull" />
<property name="username" value="root" />
<property name="password" value="root" />
</dataSource>
</environment>
</environments>
</configuration>

4、数据库信息
数据库名称为 db 账号 root 密码 root 端口3306 表数据信息
mysql> select * from student;
+--------+--------+--------+----------+
| sid | sname | sscore | saddress |
+--------+--------+--------+----------+
| 201601 | 李四 | 90 | 郑州 |
+--------+--------+--------+----------+

5、编写Student.java
package com.fz.entity;

/**
* Created by webrx on 2017-06-10.
*/
public class Student {
private int sid;
private String sname;
private int sscore;
private String saddress;

public int getSid() {
return sid;
}

public void setSid(int sid) {
this.sid = sid;
}

public String getSname() {
return sname;
}

public void setSname(String sname) {
this.sname = sname;
}

public int getSscore() {
return sscore;
}

public void setSscore(int sscore) {
this.sscore = sscore;
}

public String getSaddress() {
return saddress;
}

public void setSaddress(String saddress) {
this.saddress = saddress;
}
}

6、编写StudentDAO 接口
package com.fz.dao;

import com.fz.entity.Student;
import org.apache.ibatis.annotations.Insert;
import org.apache.ibatis.annotations.Select;

import java.util.List;

/**
* Created by webrx on 2017-06-10.
*/
public interface StudentDAO {
@Select("select * from student")
public List<Student> queryAll();

@Insert("insert into student(sname,sscore,saddress) values(#{sname},#{sscore},#{saddress})")
public int insert(Student student);
}

7、编写测试程序 src/text/java/com/Demo.java
package com;

import com.fz.dao.StudentDAO;
import com.fz.entity.Student;
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;

import java.io.IOException;
import java.util.List;

/**
* Created by webrx on 2017-06-10.
*/
public class Demo {
@Test
public void aaa() throws IOException {
//建立
SqlSessionFactory sf = new SqlSessionFactoryBuilder().build(Resources.getResourceAsReader("mybatis-config.xml"));
sf.getConfiguration().addMapper(StudentDAO.class);

SqlSession session = sf.openSession();

StudentDAO sdao = session.getMapper(StudentDAO.class);
//数据插入
Student st = new Student();
st.setSname("李四四");
st.setSscore(88);
st.setSaddress("郑州市文化路");

sdao.insert(st);

//查询显示数据
List<Student> list = sdao.queryAll();
for(Student stu : list){
System.out.println(stu.getSname());
}
session.close();

}
}