mybatis 入门案例

com.frank.domain

　　Blog.java

 1 package com.frank.domain;

 2 

 3 public class Blog {

 4     

 5     private Integer id;

 6     private String title;

 7     private String content;

 8     public Integer getId() {

 9         return id;

10     }

11     public void setId(Integer id) {

12         this.id = id;

13     }

14     public String getTitle() {

15         return title;

16     }

17     public void setTitle(String title) {

18         this.title = title;

19     }

20     public String getContent() {

21         return content;

22     }

23     public void setContent(String content) {

24         this.content = content;

25     }

26     

27     

28 

29 }

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　　BlogMapper.xml

1 <?xml version="1.0" encoding="UTF-8" ?>

2 <!DOCTYPE mapper

3 PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"

4 "http://mybatis.org/dtd/mybatis-3-mapper.dtd">

5 <mapper namespace="com.frank.domain.BlogMapper">

6     <select id="selectBlog" resultType="com.frank.domain.Blog">

7         select * from Blog where id = #{id}

8     </select>

9 </mapper>

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com.frank.test

　　Test.java

 1 package com.frank.test;

 2 

 3 import java.io.IOException;

 4 import java.io.InputStream;

 5 

 6 import org.apache.ibatis.io.Resources;

 7 import org.apache.ibatis.session.SqlSession;

 8 import org.apache.ibatis.session.SqlSessionFactory;

 9 import org.apache.ibatis.session.SqlSessionFactoryBuilder;

10 

11 import com.frank.domain.Blog;

12 

13 public class Test {

14 

15     public static void main(String[] args) throws IOException {

16         // TODO Auto-generated method stub

17 

18         String resource="mybatis-config.xml";

19         InputStream inputStream=Resources.getResourceAsStream(resource);

20         SqlSessionFactory sessionFaction=new SqlSessionFactoryBuilder().build(inputStream);

21         SqlSession session=sessionFaction.openSession();

22         

23         Blog blog=session.selectOne("com.frank.domain.BlogMapper.selectBlog", 1);

24         System.out.println(blog.getTitle());

25 

26     }

27 

28 }

View Code

 

mybatis-config.xml

　

 1 <?xml version="1.0" encoding="UTF-8" ?>

 2 <!DOCTYPE configuration

 3 PUBLIC "-//mybatis.org//DTD Config 3.0//EN"

 4 "http://mybatis.org/dtd/mybatis-3-config.dtd">

 5 <configuration>

 6     <environments default="development">

 7         <environment id="development">

 8             <transactionManager type="JDBC" />

 9             <dataSource type="POOLED">

10                 <property name="driver" value="com.mysql.jdbc.Driver" />

11                 <property name="url" value="jdbc:mysql://127.0.0.1:3306/mybatis" />

12                 <property name="username" value="root" />

13                 <property name="password" value="frank1994" />

14             </dataSource>

15         </environment>

16     </environments>

17     <mappers>

18         <mapper resource="com/frank/domain/BlogMapper.xml" />

19     </mappers>

20 </configuration>

View Code