/*SQLyog Enterprise v12.09 (64 bit)MySQL - 5.6.27-log : Database - mybatis**********************************************************************//*!40101 SET NAMES utf8 */;/*!40101 SET SQL_MODE=''*/;/*!40014 SET @OLD_UNIQUE_CHECKS=@@UNIQUE_CHECKS, UNIQUE_CHECKS=0 */;/*!40014 SET @OLD_FOREIGN_KEY_CHECKS=@@FOREIGN_KEY_CHECKS, FOREIGN_KEY_CHECKS=0 */;/*!40101 SET @OLD_SQL_MODE=@@SQL_MODE, SQL_MODE='NO_AUTO_VALUE_ON_ZERO' */;/*!40111 SET @OLD_SQL_NOTES=@@SQL_NOTES, SQL_NOTES=0 */;CREATE DATABASE /*!32312 IF NOT EXISTS*/`mybatis` /*!40100 DEFAULT CHARACTER SET utf8 */;USE `mybatis`;/*Table structure for table `author` */DROP TABLE IF EXISTS `author`;CREATE TABLE `author` (  `author_id` int(11) unsigned NOT NULL AUTO_INCREMENT COMMENT '作者ID主键',  `author_username` varchar(30) NOT NULL COMMENT '作者用户名',  `author_password` varchar(32) NOT NULL COMMENT '作者密码',  `author_email` varchar(50) NOT NULL COMMENT '作者邮箱',  `author_bio` varchar(1000) DEFAULT '这家伙很赖，什么也没留下' COMMENT '作者简介',  `register_time` datetime DEFAULT CURRENT_TIMESTAMP COMMENT '注册时间',  PRIMARY KEY (`author_id`)) ENGINE=InnoDB AUTO_INCREMENT=6 DEFAULT CHARSET=utf8;/*Data for the table `author` */

insert into `author`(`author_id`,`author_username`,`author_password`,`author_email`,`author_bio`,`register_time`) values (1,'张三','123456','123@qq.com','张三是个新手，刚开始注册','2015-10-29 10:23:59'),(2,'李四','123asf','lisi@163.com','魂牵梦萦 ','2015-10-29 10:24:29'),(3,'王五','dfsd342','ww@sina.com','康熙王朝','2015-10-29 10:25:23'),(4,'赵六','123098sdfa','zhaoliu@qq.com','花午骨','2015-10-29 10:26:09'),(5,'钱七','zxasqw','qianqi@qq.com','这家伙很赖，什么也没留下','2015-10-29 10:27:04'),(6,'张三丰','123456','zhangsf@qq.com','这家伙很赖，什么也没留下','2015-10-29 11:48:00'),(7,'张无忌','qwertyuiop','wuji@163.com','这家伙很赖，什么也没留下','2015-10-29 11:48:24');

/*Table structure for table `blog` */DROP TABLE IF EXISTS `blog`;CREATE TABLE `blog` (  `blog_id` int(11) unsigned NOT NULL AUTO_INCREMENT COMMENT 'BlogId主键',  `blog_title` varchar(255) NOT NULL COMMENT 'blog标题',  `author_id` int(11) unsigned NOT NULL COMMENT '作者ID外键',  PRIMARY KEY (`blog_id`),  KEY `fk_author_id` (`author_id`),  CONSTRAINT `fk_author_id` FOREIGN KEY (`author_id`) REFERENCES `author` (`author_id`)) ENGINE=InnoDB AUTO_INCREMENT=6 DEFAULT CHARSET=utf8;/*Data for the table `blog` */insert  into `blog`(`blog_id`,`blog_title`,`author_id`) values (1,'小张的Blog',1),(2,'小李',2),(3,'王五不是人',3),(4,'赵地人',4),(5,'钱钱钱',5);/*Table structure for table `posts` */DROP TABLE IF EXISTS `posts`;CREATE TABLE `posts` (  `post_id` int(11) unsigned NOT NULL AUTO_INCREMENT COMMENT '文章主键ID',  `post_subject` varchar(255) NOT NULL COMMENT '文章主题，标题',  `post_body` text NOT NULL COMMENT '文章内容最大3000个字符',  `blog_id` int(11) unsigned NOT NULL COMMENT 'Blog主键做外键',  `createtime` datetime DEFAULT CURRENT_TIMESTAMP COMMENT '文章创建时间',  PRIMARY KEY (`post_id`),  KEY `fk_blog_id` (`blog_id`),  CONSTRAINT `fk_blog_id` FOREIGN KEY (`blog_id`) REFERENCES `blog` (`blog_id`)) ENGINE=InnoDB AUTO_INCREMENT=8 DEFAULT CHARSET=utf8mb4;/*Data for the table `posts` */insert  into `posts`(`post_id`,`post_subject`,`post_body`,`blog_id`,`createtime`) values (1,'Mybatis入门一','什么是 MyBatis ？\r\nMyBatis 是支持定制化 SQL、存储过程以及高级映射的优秀的持久层框架。MyBatis 避免了几乎所有的 JDBC 代码和手动设置参数以及获取结果集。MyBatis 可以对配置和原生Map使用简单的 XML 或注解，将接口和 Java 的 POJOs(Plain Old Java Objects,普通的 Java对象)映射成数据库中的记录。',1,'2015-10-29 10:32:21'),(2,'Mybatis入门二','要使用 MyBatis， 只需将 mybatis-x.x.x.jar 文件置于 classpath 中即可。',1,'2015-10-29 10:32:52'),(3,'Oracle学习','Oracle Database，又名Oracle RDBMS，或简称Oracle。是甲骨文公司的一款关系数据库管理系统',2,'2015-10-29 10:33:26'),(4,'JAVA学习一','Java是由Sun Microsystems公司于1995年5月推出的Java面向对象程序设计语言和Java平台的总称',3,'2015-10-29 10:34:17'),(5,'PL/SQL','PL/SQL也是一种程序语言，叫做过程化SQL语言（Procedural Language/SQL）。PL/SQL是Oracle数据库对SQL语句的扩展',4,'2015-10-29 10:37:52'),(6,'CSS标签选择器','标签选择器\r\nID选择器\r\n类选择器\r\n特殊选择器',5,'2015-10-29 10:39:44'),(7,'javascript','js:是前端脚本语言',2,'2015-10-29 10:40:18');/*!40101 SET SQL_MODE=@OLD_SQL_MODE */;/*!40014 SET FOREIGN_KEY_CHECKS=@OLD_FOREIGN_KEY_CHECKS */;/*!40014 SET UNIQUE_CHECKS=@OLD_UNIQUE_CHECKS */;/*!40111 SET SQL_NOTES=@OLD_SQL_NOTES */;

package com.pb.mybatis.po;import java.util.Date;/** * * @Title: Author.java* @Package com.pb.mybatis.po* @ClassName Author* @Description: TODO(Blog作者类)* @author 刘楠 * @date 2015-10-29 上午9:27:53* @version V1.0 */public class Author {    //作者ID    private int authorId;        //作者用户名    private String authorUserName;        //作者密码    private String authorPassword;        //作者邮箱    private String authorEmail;        //作者介绍    private int authorBio;        //注册时间    private Date registerTime;    /**     * @return the authorId     */    public int getAuthorId() {        return authorId;    }    /**     * @param authorId the authorId to set     */    public void setAuthorId(int authorId) {        this.authorId = authorId;    }    /**     * @return the authorUserName     */    public String getAuthorUserName() {        return authorUserName;    }    /**     * @param authorUserName the authorUserName to set     */    public void setAuthorUserName(String authorUserName) {        this.authorUserName = authorUserName;    }    /**     * @return the authorPassword     */    public String getAuthorPassword() {        return authorPassword;    }    /**     * @param authorPassword the authorPassword to set     */    public void setAuthorPassword(String authorPassword) {        this.authorPassword = authorPassword;    }    /**     * @return the authorEmail     */    public String getAuthorEmail() {        return authorEmail;    }    /**     * @param authorEmail the authorEmail to set     */    public void setAuthorEmail(String authorEmail) {        this.authorEmail = authorEmail;    }    /**     * @return the authorBio     */    public int getAuthorBio() {        return authorBio;    }    /**     * @param authorBio the authorBio to set     */    public void setAuthorBio(int authorBio) {        this.authorBio = authorBio;    }    /**     * @return the registerTime     */    public Date getRegisterTime() {        return registerTime;    }    /**     * @param registerTime the registerTime to set     */    public void setRegisterTime(Date registerTime) {        this.registerTime = registerTime;    }    /** (non Javadoc)         * <p>Title: toString</p>         * <p>Description:重写toString方法 </p>         * @return         * @see java.lang.Object#toString()     */    @Override    public String toString() {        return "Author [authorId=" + authorId + ", authorUserName="                + authorUserName + ", authorPassword=" + authorPassword                + ", authorEmail=" + authorEmail + ", authorBio=" + authorBio                + ", registerTime=" + registerTime + "]";    }            }

<?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" /><typeAliases><!--使用默认别名  --><package name="com.pb.mybatis.po"/></typeAliases><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><!-- 加载映射 --><package name="com.pb.mybatis.mapper"/></mappers></configuration>

/***/package com.pb.mybatis.mapper;import java.util.List;import com.pb.mybatis.po.Author;/**   * @Title: AuthorMapper.java * @Package com.pb.mybatis.mapper * @ClassName AuthorMapper * @Description: TODO(作者接口) * @author 刘楠  * @date 2015-10-29 上午11:13:10 * @version V1.0   */public interface AuthorMapper {        /**     *      * @Title: findById         * @Description: TODO(根据查找一个用户)         * @param id     * @return Author     */    public Author findAuthorById(int authorId);        /**     *      * @Title: findByName         * @Description: TODO(根据用户名，模糊查询)         * @param name     * @return List<Author>     */    public List<Author> findAuthorByName(String name);        /**     *      * @Title: addAuthor         * @Description: TODO(添加作者)         * @param author     * @return int     */    public int addAuthor(Author author);        /**     *      * @Title: updateAuthor         * @Description: TODO(修改用户)         * @param authro     * @return int     */    public int updateAuthor(Author authro);        /**     *      * @Title: deleteAturho         * @Description: TODO(根据ID删除作者)         * @param id     * @return int     */    public int deleteAuthor(int authorId);}

<?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.pb.mybatis.mapper.AuthorMapper"><!--使用resultMap映射  type使用别名，--><resultMap type="Author" id="authorResultMap"><!--主键  --><id property="authorId" column="author_id"/><!--普通属性与表中的字段对应  --><result property="authorUserName" column="author_username"/><result property="authorPassword" column="author_password"/><result property="authorEmail" column="author_email"/><result property="authorBio" column="author_bio"/><result property="registerTime" column="register_time"/></resultMap><!--根据查找一个用户  --><select id="findAuthorById" parameterType="int" resultMap="authorResultMap">SELECT * FROM authorWHERE author_id=#{authorId}</select><!-- 根据用户名，模糊查询 --><select id="findAuthorByName" parameterType="String" resultMap="authorResultMap">SELECT * FROM authorWHERE author_username LIKE "%"#{name}"%"</select><!--添加用户   useGeneratedKeys="true" 使用数据库自增序列  keyProperty="authorId"将主键返回#号中写PO类中的属性--><insert id="addAuthor" parameterType="Author" useGeneratedKeys="true" keyProperty="authorId">INSERT INTO author(author_username,author_password,author_email,author_bio,register_time) VALUES(#{authorUserName},#{authorPassword},#{authorEmail},#{authorBio},#{registerTime})</insert><!--修改用户  --><update id="updateAuthor" parameterType="Author">update author set author_username=#{authorUserName},author_password=#{authorPassword},author_email=#{authorEmail},author_bio=#{authorBio},register_time=#{registerTime}where author_id=#{authorId}</update><!--删除用户  根据ID--><delete id="deleteAuthor" parameterType="int">delete from authorwhere author_id=#{authorId}</delete></mapper>

/***/package com.pb.mybatis.mapper;import java.io.InputStream;import java.util.Date;import java.util.List;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 com.pb.mybatis.po.Author;/**   * @Title: AuthorMapperTest.java * @Package com.pb.mybatis.mapper * @ClassName AuthorMapperTest * @Description: TODO(测试) * @author 刘楠  * @date 2015-10-29 上午11:57:21 * @version V1.0   */public class AuthorMapperTest {        private SqlSessionFactory sqlSessionFactory;        /**     *      * @Title: setUp         * @Description: TODO(在每个方法前执行的方法)         * @throws Exception void     */    @Before    public void setUp() throws Exception {        String resource="configuration.xml";        InputStream in=Resources.getResourceAsStream(resource);        //获取会话工厂        sqlSessionFactory=new SqlSessionFactoryBuilder().build(in);    }    /**     *      * @Title: testFindAuthorById         * @Description: TODO(根据查找一个用户)     void     */    @Test    public void testFindAuthorById() {        //获取会话        SqlSession sqlSession=sqlSessionFactory.openSession();        //Mapper接口        AuthorMapper authorMapper=sqlSession.getMapper(AuthorMapper.class);        //调用方法        Author author=authorMapper.findAuthorById(2);        System.out.println(author);        //关闭会话        sqlSession.close();    }    /**     *      * @Title: testFindAuthorByName         * @Description: TODO(根据用户名，模糊查询)     void     */    @Test    public void testFindAuthorByName() {        //获取会话                SqlSession sqlSession=sqlSessionFactory.openSession();                //Mapper接口                AuthorMapper authorMapper=sqlSession.getMapper(AuthorMapper.class);                //调用方法                List<Author> authors=authorMapper.findAuthorByName("张");                System.out.println(authors);                //关闭会话                sqlSession.close();                for(Author a:authors){                    System.out.println(a.toString());                }    }    /**     *      * @Title: testAddAuthor         * @Description: TODO(添加作者)     void     */    @Test    public void testAddAuthor() {        //获取会话        SqlSession sqlSession=sqlSessionFactory.openSession();        //Mapper接口        AuthorMapper authorMapper=sqlSession.getMapper(AuthorMapper.class);        //调用方法        Author author=new Author();        author.setAuthorUserName("不知道");        author.setAuthorPassword("1234567890");        author.setAuthorEmail("123456@qq.com");        author.setAuthorBio("知道是个什么");        author.setRegisterTime(new Date());        int num=authorMapper.addAuthor(author);        System.out.println("num="+num);        System.out.println("authorId="+author.getAuthorId());        sqlSession.commit();        //关闭会话        sqlSession.close();            }    /**     *      * @Title: testUpdateAuthor         * @Description: TODO(修改用户)     void     */    @Test    public void testUpdateAuthor() {        //获取会话                SqlSession sqlSession=sqlSessionFactory.openSession();                //Mapper接口                AuthorMapper authorMapper=sqlSession.getMapper(AuthorMapper.class);                //调用方法                Author author=authorMapper.findAuthorById(8);                author.setAuthorUserName("知道了");                author.setAuthorPassword("456789");                author.setAuthorEmail("456789@qq.com");                author.setAuthorBio("哈哈哈哈哈雅虎");                author.setRegisterTime(new Date());                int num=authorMapper.updateAuthor(author);                System.out.println("num="+num);                System.out.println("authorId="+author.getAuthorId());                sqlSession.commit();                //关闭会话                sqlSession.close();                    }    /**     *      * @Title: testDeleteAuthor         * @Description: TODO(根据ID删除作者)     void     */    @Test    public void testDeleteAuthor() {        //获取会话        SqlSession sqlSession=sqlSessionFactory.openSession();        //Mapper接口        AuthorMapper authorMapper=sqlSession.getMapper(AuthorMapper.class);        //调用方法                int num=authorMapper.deleteAuthor(10);        System.out.println("num="+num);            sqlSession.commit();        //关闭会话        sqlSession.close();    }}

package com.pb.mybatis.po;/**   * @Title: Blog.java * @Package com.pb.mybatis.po * @ClassName Blog * @Description: TODO(博客) * @author 刘楠  * @date 2015-10-29 上午9:32:56 * @version V1.0   */public class Blog {    //博客ID    private int blogId;        //标题    private String blogTitle;        //博客作者    private Author author;    /**     * @return the blogId     */    public int getBlogId() {        return blogId;    }    /**     * @param blogId the blogId to set     */    public void setBlogId(int blogId) {        this.blogId = blogId;    }    /**     * @return the blogTitle     */    public String getBlogTitle() {        return blogTitle;    }    /**     * @param blogTitle the blogTitle to set     */    public void setBlogTitle(String blogTitle) {        this.blogTitle = blogTitle;    }    /**     * @return the author     */    public Author getAuthor() {        return author;    }    /**     * @param author the author to set     */    public void setAuthor(Author author) {        this.author = author;    }    /** (non Javadoc)         * <p>Title: toString</p>         * <p>Description: 重写toString方法</p>         * @return         * @see java.lang.Object#toString()     */    @Override    public String toString() {        return "Blog [blogId=" + blogId + ", blogTitle=" + blogTitle                + ", author=" + author + "]";    }        }

/***/package com.pb.mybatis.mapper;import java.util.List;import com.pb.mybatis.po.Author;import com.pb.mybatis.po.Blog;/**   * @Title: BlogMapper.java * @Package com.pb.mybatis.mapper * @ClassName BlogMapper * @Description: TODO(用一句话描述该文件做什么) * @author 刘楠  * @date 2015-10-29 上午11:13:21 * @version V1.0   */public interface BlogMapper {    /**     *      * @Title: findBlogById         * @Description: TODO(根据ID查找BLOG)         * @param id     * @return Blog     */    public Blog findBlogById(int id);        /**     *      * @Title: findByName         * @Description: TODO(根据博客名查找)         * @param name     * @return List<Blog>     */    public List<Blog> findBlogByName(String blogTitle);        /**     *      * @Title: addBlog         * @Description: TODO(添加博客)         * @param blog     * @return int     */    public int addBlog(Blog blog);            /**     *      * @Title: updateBlog         * @Description: TODO(修改博客)         * @param blog     * @return int     */    public int updateBlog(Blog blog);        /**     *      * @Title: deleteBlog         * @Description: TODO(删除博客)         * @param id     * @return int     */    public int deleteBlog(int id);}

<?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.pb.mybatis.mapper.BlogMapper"><!--使用ResultMap  --><resultMap type="Blog" id="blogResultMap"><!--主键  --><id property="blogId" column="blog_id"/><!--标题  --><result property="blogTitle" column="blog_title"/><!--一对一关联   第一种--><association property="author" resultMap="authorResultMap"/><!--  第二种把作者类再映射在一个resultMap中<association property="author" resultMap="authorResultMap"><id property="authorId" column="author_id"/>普通属性与表中的字段对应 <result property="authorUserName" column="author_username"/><result property="authorPassword" column="author_password"/><result property="authorEmail" column="author_email"/><result property="authorBio" column="author_bio"/><result property="registerTime" column="register_time"/></association> --></resultMap><!--使用resultMap映射  type使用别名，单独使用Author关联--><resultMap type="Author" id="authorResultMap"><!--主键  --><id property="authorId" column="author_id"/><!--普通属性与表中的字段对应  --><result property="authorUserName" column="author_username"/><result property="authorPassword" column="author_password"/><result property="authorEmail" column="author_email"/><result property="authorBio" column="author_bio"/><result property="registerTime" column="register_time"/></resultMap><!--  根据ID查询--><select id="findBlogById" parameterType="int" resultMap="blogResultMap">SELECT blog.blog_id,blog.blog_title,author.author_id,author.author_username,author.author_password,author.author_email,author.author_bio,author.register_timeFROM blog,author    WHERE blog.author_id=author.author_idAND blog.blog_id=#{blogId}</select><!-- 根据名字查询 --><select id="findBlogByName" parameterType="String" resultMap="blogResultMap">SELECT blog.blog_id,blog.blog_title,author.author_id,author.author_username,author.author_password,author.author_email,author.author_bio,author.register_timeFROM blog,author    WHERE blog.author_id=author.author_idAND blog_title LIKE "%"#{blogTitle}"%"</select><!-- 添加Blog --><insert id="addBlog" parameterType="Blog" useGeneratedKeys="true" keyProperty="blogId">INSERT INTO blog(blog_title,author_id)VALUES(#{blogTitle},#{author.authorId})</insert><!--修改  --><update id="updateBlog" parameterType="Blog">UPDATE blog SET blog_title=#{blogTitle},author_id=#{author.authorId}WHERE blog_id=#{blogId}</update><!--删除  --><delete id="deleteBlog" parameterType="int">delete from blog where blog_id=#{blogId}</delete></mapper>

package com.pb.mybatis.mapper;import static org.junit.Assert.*;import java.io.InputStream;import java.util.List;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 com.pb.mybatis.po.Author;import com.pb.mybatis.po.Blog;/**   * @Title: BlogMapperTest.java * @Package com.pb.mybatis.mapper * @ClassName BlogMapperTest * @Description: TODO(用一句话描述该文件做什么) * @author 刘楠  * @date 2015-10-29 下午3:12:52 * @version V1.0   */public class BlogMapperTest {    private SqlSessionFactory sqlSessionFactory;        @Before    public void setUp() throws Exception {        String resource="configuration.xml";        InputStream in=Resources.getResourceAsStream(resource);        //获取会话工厂        sqlSessionFactory=new SqlSessionFactoryBuilder().build(in);    }    /**     * Test method for {@link com.pb.mybatis.mapper.BlogMapper#findBlogById(int)}.     */    @Test    public void testFindBlogById() {        //获取会话                SqlSession sqlSession=sqlSessionFactory.openSession();                //Mapper接口                BlogMapper blogMapper=sqlSession.getMapper(BlogMapper.class);                //调用方法                Blog blog=blogMapper.findBlogById(2);                System.out.println(blog);                //关闭会话                sqlSession.close();    }    /**     * Test method for {@link com.pb.mybatis.mapper.BlogMapper#findBlogByName(java.lang.String)}.     */    @Test    public void testFindBlogByName() {        //获取会话        SqlSession sqlSession=sqlSessionFactory.openSession();        //Mapper接口        BlogMapper blogMapper=sqlSession.getMapper(BlogMapper.class);        //调用方法        List<Blog> blogs=blogMapper.findBlogByName("小");        System.out.println(blogs);        //关闭会话        sqlSession.close();    }    /**     * Test method for {@link com.pb.mybatis.mapper.BlogMapper#addBlog(com.pb.mybatis.po.Blog)}.     */    @Test    public void testAddBlog() {        //获取会话                SqlSession sqlSession=sqlSessionFactory.openSession();                //Mapper接口                BlogMapper blogMapper=sqlSession.getMapper(BlogMapper.class);                Blog blog=new Blog();                blog.setBlogTitle("倚天屠龙记");                AuthorMapper authorMapper=sqlSession.getMapper(AuthorMapper.class);                //调用方法                Author author=authorMapper.findAuthorById(2);                blog.setAuthor(author);                int num=blogMapper.addBlog(blog);                System.out.println("num="+num);                System.out.println(blog.getBlogId());                sqlSession.commit();                sqlSession.close();    }    /**     * Test method for {@link com.pb.mybatis.mapper.BlogMapper#updateBlog(com.pb.mybatis.po.Blog)}.     */    @Test    public void testUpdateBlog() {        //获取会话        SqlSession sqlSession=sqlSessionFactory.openSession();        //Mapper接口        BlogMapper blogMapper=sqlSession.getMapper(BlogMapper.class);        //调用方法        Blog blog=blogMapper.findBlogById(8);        blog.setBlogTitle("笑傲江湖");        Author author=blog.getAuthor();        author.setAuthorUserName("金庸");        AuthorMapper authorMapper=sqlSession.getMapper(AuthorMapper.class);        int authorNum=authorMapper.updateAuthor(author);        int num=blogMapper.updateBlog(blog);        System.out.println("authorNum="+authorNum);        System.out.println("num="+num);        sqlSession.commit();        //关闭会话        sqlSession.close();    }    /**     * Test method for {@link com.pb.mybatis.mapper.BlogMapper#deleteBlog(int)}.     */    @Test    public void testDeleteBlog() {        //获取会话                SqlSession sqlSession=sqlSessionFactory.openSession();                //Mapper接口                BlogMapper blogMapper=sqlSession.getMapper(BlogMapper.class);                int num=blogMapper.deleteBlog(11);                System.out.println("num="+num);                sqlSession.commit();                sqlSession.close();        }}

package com.pb.mybatis.po;import java.util.Date;/**   * @Title: Posts.java * @Package com.pb.mybatis.po * @ClassName Posts * @Description: TODO(Blog文章) * @author 刘楠  * @date 2015-10-29 上午9:31:22 * @version V1.0   */public class Posts {    //文章ID    private int postId;        //文件主题    private String postSubject;        //主体内容    private String postBody;    //文章建立时间    private Date createTime;            /**     * @return the postId     */    public int getPostId() {        return postId;    }    /**     * @param postId the postId to set     */    public void setPostId(int postId) {        this.postId = postId;    }    /**     * @return the postSubject     */    public String getPostSubject() {        return postSubject;    }    /**     * @param postSubject the postSubject to set     */    public void setPostSubject(String postSubject) {        this.postSubject = postSubject;    }    /**     * @return the postBody     */    public String getPostBody() {        return postBody;    }    /**     * @param postBody the postBody to set     */    public void setPostBody(String postBody) {        this.postBody = postBody;    }   /**     * @return the createTime     */    public Date getCreateTime() {        return createTime;    }    /**     * @param createTime the createTime to set     */    public void setCreateTime(Date createTime) {        this.createTime = createTime;    }    /** (non Javadoc)         * <p>Title: toString</p>         * <p>Description:重写toString方法</p>         * @return         * @see java.lang.Object#toString()     */    @Override    public String toString() {        return "Posts [postId=" + postId + ", postSubject=" + postSubject                + ", postBody=" + postBody +", createTime="                + createTime + "]";    }                }

package com.pb.mybatis.po;import java.util.List;/**   * @Title: Blog.java * @Package com.pb.mybatis.po * @ClassName Blog * @Description: TODO(博客) * @author 刘楠  * @date 2015-10-29 上午9:32:56 * @version V1.0   */public class Blog {    //博客ID    private int blogId;        //标题    private String blogTitle;        //博客作者    private Author author;        //文章List    private List<Posts> posts;    /**     * @return the blogId     */    public int getBlogId() {        return blogId;    }    /**     * @param blogId the blogId to set     */    public void setBlogId(int blogId) {        this.blogId = blogId;    }    /**     * @return the blogTitle     */    public String getBlogTitle() {        return blogTitle;    }    /**     * @param blogTitle the blogTitle to set     */    public void setBlogTitle(String blogTitle) {        this.blogTitle = blogTitle;    }    /**     * @return the author     */    public Author getAuthor() {        return author;    }    /**     * @param author the author to set     */    public void setAuthor(Author author) {        this.author = author;    }    /**     * @return the posts     */    public List<Posts> getPosts() {        return posts;    }    /**     * @param posts the posts to set     */    public void setPosts(List<Posts> posts) {        this.posts = posts;    }    /** (non Javadoc)         * <p>Title: toString</p>         * <p>Description: </p>         * @return         * @see java.lang.Object#toString()     */    @Override    public String toString() {        return "Blog [blogId=" + blogId + ", blogTitle=" + blogTitle                + ", author=" + author + ", posts=" + posts + "]";    }            }

<?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.pb.mybatis.mapper.BlogMapper"><!--使用ResultMap  --><resultMap type="Blog" id="blogResultMap"><!--主键  --><id property="blogId" column="blog_id"/><!--标题  --><result property="blogTitle" column="blog_title"/><!--一对一关联   第一种--><association property="author" resultMap="authorResultMap"/><!--一对多关联  --><collection property="posts" resultMap="postsResultMap" ofType="Posts"/><!--  第二种把作者类再映射在一个resultMap中<association property="author" resultMap="authorResultMap"><id property="authorId" column="author_id"/>普通属性与表中的字段对应 <result property="authorUserName" column="author_username"/><result property="authorPassword" column="author_password"/><result property="authorEmail" column="author_email"/><result property="authorBio" column="author_bio"/><result property="registerTime" column="register_time"/></association> --></resultMap><!--文章Map  --><resultMap type="Posts" id="postsResultMap"><id property="postId" column="post_id"/><result property="postSubject" column="post_subject"/><result property="postBody" column="post_body"/><result property="createTime" column="createtime"/></resultMap><!--使用resultMap映射  type使用别名，单独使用Author关联--><resultMap type="Author" id="authorResultMap"><!--主键  --><id property="authorId" column="author_id"/><!--普通属性与表中的字段对应  --><result property="authorUserName" column="author_username"/><result property="authorPassword" column="author_password"/><result property="authorEmail" column="author_email"/><result property="authorBio" column="author_bio"/><result property="registerTime" column="register_time"/></resultMap><!--  根据ID查询--><select id="findBlogById" parameterType="int" resultMap="blogResultMap">SELECT blog.blog_id,blog.blog_title,author.author_id,author.author_username,author.author_password,author.author_email,author.author_bio,author.register_time,posts.post_id,posts.post_subject,posts.post_body,posts.createtime,posts.blog_idFROM blog,author,posts    WHERE blog.author_id=author.author_idAND blog.blog_id=posts.blog_idAND blog.blog_id=#{blogId}</select><!-- 根据名字查询 --><select id="findBlogByName" parameterType="String" resultMap="blogResultMap">SELECT blog.blog_id,blog.blog_title,author.author_id,author.author_username,author.author_password,author.author_email,author.author_bio,author.register_timeFROM blog,author    WHERE blog.author_id=author.author_idAND blog_title LIKE "%"#{blogTitle}"%"</select><!-- 添加Blog --><insert id="addBlog" parameterType="Blog" useGeneratedKeys="true" keyProperty="blogId">INSERT INTO blog(blog_title,author_id)VALUES(#{blogTitle},#{author.authorId})</insert><!--修改  --><update id="updateBlog" parameterType="Blog">UPDATE blog SET blog_title=#{blogTitle},author_id=#{author.authorId}WHERE blog_id=#{blogId}</update><!--删除  --><delete id="deleteBlog" parameterType="int">delete from blog where blog_id=#{blogId}</delete></mapper>