06mybatis-CRUD操作

mybatis CRUD 操作
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db.properties
jdbc.driver=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql://localhost:3306/db?useSSL=true&useUnicode=true&characterEncoding=UTF8
jdbc.username=root
jdbc.password=root

mybatis-config.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>
<properties resource="db.properties"/>
<environments default="development">
<environment id="development">
<transactionManager type="JDBC"/>
<dataSource type="POOLED">
<property name="driver" value="${jdbc.driver}"/>
<property name="url" value="${jdbc.url}"/>
<property name="username" value="${jdbc.username}"/>
<property name="password" value="${jdbc.password}"/>
</dataSource>
</environment>
</environments>
<mappers>

<package name="com.fz.mapper"/>
</mappers>
</configuration>

com.fz.mapper.BookMapper.java 接口
package com.fz.mapper;

import com.fz.entity.Book;
import org.apache.ibatis.annotations.Select;

import java.util.List;

/**
* Created by webrx on 2017-06-13.
*/
public interface BookMapper {
@Select("select * from book")
public List<Book> query();
}

mybatis-config.xml 文件配置
<mappers>
<mapper class="com.fz.mapper.BookMapper"/>
</mappers>

程序代码
BookMapper bdao = ss.getMapper(BookMapper.class);
List<Book> bks = bdao.query();
for(Book book : bks){
System.out.println(book.getName());
}

com.fz.mapper.BookMapper.xml 映射配置文件
<?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.fz.mapper.BookMapper">
<select id="query" resultType="com.fz.entity.Book">
select * from book
</select>
</mapper>

mybatis-config.xml 文件配置
<mappers>
<mapper class="com.fz.mapper.BookMapper"/>
</mappers>

程序代码
inputStream = Resources.getResourceAsStream("mybatis-config.xml");
new SqlSessionFactoryBuilder().build(inputStream);
ss = sf.openSession();
List<Book> bks = ss.selectList("com.fz.mapper.BookMapper.query");
for(Book book : bks){
System.out.println(book.getName());
}

测试代码
import com.fz.entity.Book;
import com.fz.mapper.BookMapper;
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;

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

/**
* Created by webrx on 2017-06-13.
*/
public class Demo {
protected SqlSessionFactory sf;
protected SqlSession ss;

@Before
public void init(){
InputStream inputStream = null;
try {
inputStream = Resources.getResourceAsStream("mybatis-config.xml");
} catch (IOException e) {
e.printStackTrace();
}
sf = new SqlSessionFactoryBuilder().build(inputStream);
ss = sf.openSession();
}

@Test
public void show(){
BookMapper bdao = ss.getMapper(BookMapper.class);

//插入
//Book b = new Book();
//b.setName("《javascript案例设计》");
//b.setPrice(80d);
//bdao.save(b);

//删除
bdao.deleteById(4);

ss.commit();

//List<Book> bks = bdao.query();

List<Book> bks = ss.selectList("com.fz.mapper.BookMapper.query");
for(Book book : bks){
System.out.println(book.getName());
}
}
}

怕什么真理无穷，进一步有一步的欢喜