mybatis学习(44):二级缓存1
2024-05-08 15:14:03
目录结构
com.geyao.mybatis.mapper
BlogMapper类
package com.geyao.mybatis.mapper;import java.util.List;
import java.util.Map;import org.apache.ibatis.annotations.Param;import com.geyao.mybatis.pojo.Blog;public interface BlogMapper {Blog selectBlog(Integer id);Blog selectBlog2(Integer id);List<Blog> selectBlogByTitle(String title);List<Blog> selectBlogByTitle2(String title);List<Blog> selectBlogBySort(String column);List<Blog> selectBlogByPage(int offset,int pagesize);List<Blog> selectBlogByPage1(@Param(value="offset")int offset,@Param(value="pagesize")int pagesize);List<Blog> selectBlogByPage2(Map<String, Object>map);int insertBlog(Blog blog);int insertBlogMysql(Blog blog);int updateBlog(Blog blog);int deleteBlogById(Integer id);List<Blog> selectActiveBlogByTitle(String title);List<Blog> selectActiveBlogByTitleOrStyle(Blog blog);List<Blog> selectBlogByCondition(Blog blog);int updateBlogByCondition(Blog blog);List<Blog> selectBlogByConditionTrim(Blog blog);int updateBlogByConditionTrim(Blog blog);int deleteBlogList(List<Integer> ids);
}
BlogMapper.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">
<!-- 为这个mapper指定一个唯一的namespace，namespace的值习惯上设置成包名+sql映射文件名，这样就能够保证namespace的值是唯一的
例如namespace="me.gacl.mapping.userMapper"就是me.gacl.mapping(包名)+userMapper(userMapper.xml文件去除后缀)-->
<mapper namespace="com.geyao.mybatis.mapper.BlogMapper"><!-- 在select标签中编写查询的SQL语句， 设置select标签的id属性为getUser，id属性值必须是唯一的，不能够重复使用parameterType属性指明查询时使用的参数类型，resultType属性指明查询返回的结果集类型resultType="me.gacl.domain.User"就表示将查询结果封装成一个User类的对象返回User类就是users表所对应的实体类--><!-- 根据id查询得到一个user对象--><resultMap type="Blog" id="blogResultMap"><id column="id" property="id" jdbcType="INTEGER"></id><result column="authod_id" property="authodId" jdbcType="INTEGER"/></resultMap><!-- sql片段 --><sql id="columnbase">select id,title,authod_id as authodId,state,featured,style</sql><!-- crud --><select id="selectBlog" parameterType="int" resultType="Blog">select *from Blog where id=#{id}</select> <select id="selectBlog2" parameterType="int" resultMap="blogResultMap">select *from Blog where id=#{id}</select><select id="selectBlogByTitle" parameterType="String" resultMap="blogResultMap">select * from Blog where title like #{title}</select><select id="selectBlogByTitle2" parameterType="String" resultMap="blogResultMap">select * from Blog where title like '${value}'</select><select id="selectBlogBySort" parameterType="String" resultMap="blogResultMap">select * from Blog order by ${value}</select><select id="selectBlogByPage" resultMap="blogResultMap">select * from Blog limit #{0},#{1}</select><select id="selectBlogByPage1" resultMap="blogResultMap">select * from Blog limit #{offset},#{pagesize}</select><select id="selectBlogByPage2" resultMap="blogResultMap">select * from Blog limit #{offset},#{pagesize}</select><insert id="insertBlog" parameterType="Blog" useGeneratedKeys="true" keyProperty="id">INSERT INTO Blog(title,authod_id,state,featured,style)VALUES(#{title},#{authodId},#{state},#{featured},#{style})</insert><insert id="insertBlogOracle" parameterType="Blog" ><selectKey resultType="java.lang.Integer" order="BEFORE" keyProperty="id">select seq.nextval as id from dual</selectKey>INSERT INTO Blog(title,authod_id,state,featured,style)VALUES(#{title},#{authodId},#{state},#{featured},#{style})</insert><insert id="insertBlogMysql" parameterType="Blog" ><selectKey resultType="java.lang.Integer" order="AFTER" keyProperty="id">SELECT LAST_INSERT_ID()</selectKey>INSERT INTO Blog(title,authod_id,state,featured,style)VALUES(#{title},#{authodId},#{state},#{featured},#{style})</insert><update id="updateBlog" parameterType="Blog" >UPDATE BlogSETtitle = #{title},authod_id = #{authodId},state = #{state},featured = #{featured},
style= #{ style}WHERE id = #{id}</update><delete id="deleteBlogById" parameterType="int">delete from blog where id =#{id}</delete><!-- 动态sql --><select id="selectActiveBlogByTitle" parameterType="String" resultMap="blogResultMap">SELECT * FROM blogwhere state ='ACTIVE'<if test="value!=null and value !=''">AND title LIKE '%o%'</if></select><select id="selectActiveBlogByTitleOrStyle" parameterType="Blog" resultMap="blogResultMap">SELECT * FROM blogwhere state ='ACTIVE'<choose><when test="title !=null and title !=''">and lower(title) like lower(#{title})</when><when test="style !=null and style!=''"></when><otherwise>and featured=true;</otherwise></choose></select><select id="selectBlogByCondition" parameterType="Blog" resultMap="blogResultMap">select * from blog<where><if test="state !=null and state !=''">state=#{state}</if><if test="title !=null and title !=''">and lower(title) like lower(#{title})</if><if test=" featured !=null">and featured = #{featured}</if></where></select><update id="updateBlogByCondition" parameterType="Blog" >UPDATE Blog<set><if test="title!=null">title = #{title},</if><if test="authodId!=null">authod_id = #{authodId},</if><if test="state!=null">state = #{state},</if><if test="featured!=null">featured = #{featured},</if>
<if test="style!=null">style= #{ style}</if>
</set>WHERE id = #{id}</update><select id="selectBlogByConditionTrim" parameterType="Blog" resultMap="blogResultMap">select * from blog<trim prefix="where" prefixOverrides="and / or"><if test="state !=null and state !=''">state=#{state}</if><if test="title !=null and title !=''">lower(title) like lower(#{title})</if><if test=" featured !=null">and featured = #{featured}</if></trim></select><update id="updateBlogByConditionTrim" parameterType="Blog" >UPDATE Blog<trim prefix="set" suffixOverrides=","><if test="title!=null">title = #{title},</if><if test="authodId!=null">authod_id = #{authodId},</if><if test="state!=null">state = #{state},</if><if test="featured!=null">featured = #{featured},</if>
<if test="style!=null">style= #{ style}</if>
</trim>WHERE id = #{id}</update><delete id="deleteBlogList" parameterType="list" >delete from Blog where id in<foreach collection="list" item="item" open="(" close= ")" separator=",">#{item}</foreach></delete></mapper>
com.geyao.mybatis.pojo
Blog类
package com.geyao.mybatis.pojo;public class Blog {private Integer id;private String title;private int authodId;private String state;private Boolean featured;private String style;public Blog() {super();this.title="未命名";this.authodId=4;this.state="NOT";this.featured=false;this.style="red"; }public Integer getId() {return id;}public void setId(Integer id) {this.id = id;}public String getTitle() {return title;}public void setTitle(String title) {this.title = title;}public int getAuthodId() {return authodId;}public void setAuthodId(int authodId) {this.authodId = authodId;}public String getState() {return state;}public void setState(String state) {this.state = state;}public Boolean getFeatured() {return featured;}public void setFeatured(Boolean featured) {this.featured = featured;}public String getStyle() {return style;}public void setStyle(String style) {this.style = style;}@Overridepublic String toString() {return "Blog [id=" + id + ", title=" + title + ", authodId=" + authodId + ", state=" + state + ", featured="+ featured + ", style=" + style + "]\n";}}
com.geyao.mybatis.util
MybatisUtil类
package com.geyao.mybatis.util;import java.io.InputStream;
import java.io.Reader;import org.apache.ibatis.io.Resources;
import org.apache.ibatis.session.SqlSession;
import org.apache.ibatis.session.SqlSessionFactory;
import org.apache.ibatis.session.SqlSessionFactoryBuilder;public class MyBatisUtil {private static SqlSessionFactory sqlSessionFactory =null;static {try {InputStream in = Resources.getResourceAsStream("mybatis-config.xml");sqlSessionFactory = new SqlSessionFactoryBuilder().build(in);} catch (Exception e) {// TODO Auto-generated catch blocke.printStackTrace();}}private MyBatisUtil() {}public static SqlSession getSqlSession() {return sqlSessionFactory.openSession();}
}
log4j.properties
### \u914D\u7F6E\u6839 ###
log4j.rootLogger = debug,console ,fileAppender,dailyRollingFile,ROLLING_FILE,MAIL,DATABASE### \u8BBE\u7F6E\u8F93\u51FAsql\u7684\u7EA7\u522B\uFF0C\u5176\u4E2Dlogger\u540E\u9762\u7684\u5185\u5BB9\u5168\u90E8\u4E3Ajar\u5305\u4E2D\u6240\u5305\u542B\u7684\u5305\u540D ###
log4j.logger.org.apache=dubug
log4j.logger.java.sql.Connection=dubug
log4j.logger.java.sql.Statement=dubug
log4j.logger.java.sql.PreparedStatement=dubug
log4j.logger.java.sql.ResultSet=dubug### \u914D\u7F6E\u8F93\u51FA\u5230\u63A7\u5236\u53F0 ###
log4j.appender.console = org.apache.log4j.ConsoleAppender
log4j.appender.console.Target = System.out
log4j.appender.console.layout = org.apache.log4j.PatternLayout
log4j.appender.console.layout.ConversionPattern = %d{ABSOLUTE} %5p %c{1}:%L - %m%nmybatis-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><typeAliases><typeAlias type="com.geyao.mybatis.pojo.Blog" alias="Blog"/>
</typeAliases><environments default="development"><environment id="development"><transactionManager type="JDBC" /><!-- 配置数据库连接信息 --><dataSource type="POOLED"><property name="driver" value="com.mysql.cj.jdbc.Driver" /><property name="url" value="jdbc:mysql://localhost:3306/mybatis?serverTimezone=GMT%2B8" /><property name="username" value="root" /><property name="password" value="123" /></dataSource></environment></environments><mappers><!-- 注册userMapper.xml文件， userMapper.xml位于me.gacl.mapping这个包下，所以resource写成me/gacl/mapping/userMapper.xml--><mapper resource="com/geyao/mybatis/mapper/BlogMapper.xml"/></mappers>
</configuration>
单元测试
com.geyao.mybatis.util
testSelectBlog类
package com.geyao.mybatis.mapper;import java.util.HashMap;
import java.util.List;
import java.util.Map;import org.apache.ibatis.session.SqlSession;
import org.junit.Test;import com.geyao.mybatis.pojo.Blog;
import com.geyao.mybatis.util.MyBatisUtil;public class testSelectBlog {@Testpublic void testSelectBlogNoInterface() {SqlSession session =MyBatisUtil.getSqlSession();Blog blog =(Blog)session.selectOne("com.geyao.mybatis.mapper.BlogMapper.selectBlog", 101);session.close();System.out.println(blog);}
@Test
public void testSelectBlog() {SqlSession session =MyBatisUtil.getSqlSession();BlogMapper blogMapper =session.getMapper(BlogMapper.class);Blog blog = blogMapper.selectBlog(1);System.out.println(blog);
}@Test
public void testSelectBlog2() {SqlSession session =MyBatisUtil.getSqlSession();BlogMapper blogMapper =session.getMapper(BlogMapper.class);Blog blog = blogMapper.selectBlog2(1);System.out.println(blog);
}
@Test
public void testselectBlogByTitle() {SqlSession session =MyBatisUtil.getSqlSession();BlogMapper blogMapper =session.getMapper(BlogMapper.class);List<Blog> blogList = blogMapper.selectBlogByTitle("%g%");System.out.println(blogList);
}@Test
public void testselectBlogByTitle2() {SqlSession session =MyBatisUtil.getSqlSession();BlogMapper blogMapper =session.getMapper(BlogMapper.class);List<Blog> blogList = blogMapper.selectBlogByTitle2("%g%");System.out.println(blogList);
}
@Test
public void testselectBlogBySort() {SqlSession session =MyBatisUtil.getSqlSession();BlogMapper blogMapper =session.getMapper(BlogMapper.class);List<Blog> blogList = blogMapper.selectBlogBySort("title");System.out.println(blogList);
}
@Test
public void testselectBlogByPage() {SqlSession session =MyBatisUtil.getSqlSession();BlogMapper blogMapper =session.getMapper(BlogMapper.class);List<Blog> blogList = blogMapper.selectBlogByPage(2,2);System.out.println(blogList);
}
@Test
public void testselectBlogByPage1() {SqlSession session =MyBatisUtil.getSqlSession();BlogMapper blogMapper =session.getMapper(BlogMapper.class);List<Blog> blogList = blogMapper.selectBlogByPage1(2,2);System.out.println(blogList);
}
@Test
public void testselectBlogByPage2() {SqlSession session =MyBatisUtil.getSqlSession();BlogMapper blogMapper =session.getMapper(BlogMapper.class);Map<String, Object> map =new HashMap<String, Object>();map.put("offset", 2);map.put("pagesize", 2);List<Blog> blogList = blogMapper.selectBlogByPage2(map);System.out.println(blogList);
}@Test
public void testInsertBlog() {SqlSession session =MyBatisUtil.getSqlSession();BlogMapper blogMapper =session.getMapper(BlogMapper.class);Blog blog=new Blog();int count= blogMapper.insertBlog(blog);session.commit();session.close();System.out.println(blog);System.out.println("插入的"+count+"记录");
}@Test
public void testinsertBlogMysql() {SqlSession session =MyBatisUtil.getSqlSession();BlogMapper blogMapper =session.getMapper(BlogMapper.class);Blog blog=new Blog();int count= blogMapper.insertBlogMysql(blog);session.commit();session.close();System.out.println(blog);System.out.println("插入的"+count+"记录");
}@Test
public void testupdateBlog() {SqlSession session =MyBatisUtil.getSqlSession();BlogMapper blogMapper =session.getMapper(BlogMapper.class);Blog blog=new Blog();blog.setId(1);blog.setTitle("geyao");blog.setStyle("balck");blog.setState("active");blog.setFeatured(false);blog.setAuthodId(2);int count= blogMapper.updateBlog(blog);session.commit();session.close();System.out.println(blog);System.out.println("修改"+count+"记录");
}
}
jar包
链接：https://pan.baidu.com/s/1g6NgzfLc5uK9S4VL-03lHg
提取码：4r2m
运行结果
目录结构
com.geyao.mybatis.mapper
BlogMapper类
package com.geyao.mybatis.mapper;import java.util.List;
import java.util.Map;import org.apache.ibatis.annotations.Param;import com.geyao.mybatis.pojo.Blog;public interface BlogMapper {Blog selectBlog(Integer id);Blog selectBlog2(Integer id);List<Blog> selectBlogByTitle(String title);List<Blog> selectBlogByTitle2(String title);List<Blog> selectBlogBySort(String column);List<Blog> selectBlogByPage(int offset,int pagesize);List<Blog> selectBlogByPage1(@Param(value="offset")int offset,@Param(value="pagesize")int pagesize);List<Blog> selectBlogByPage2(Map<String, Object>map);int insertBlog(Blog blog);int insertBlogMysql(Blog blog);int updateBlog(Blog blog);
}
BlogMapper.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">
<!-- 为这个mapper指定一个唯一的namespace，namespace的值习惯上设置成包名+sql映射文件名，这样就能够保证namespace的值是唯一的
例如namespace="me.gacl.mapping.userMapper"就是me.gacl.mapping(包名)+userMapper(userMapper.xml文件去除后缀)-->
<mapper namespace="com.geyao.mybatis.mapper.BlogMapper"><!-- 在select标签中编写查询的SQL语句， 设置select标签的id属性为getUser，id属性值必须是唯一的，不能够重复使用parameterType属性指明查询时使用的参数类型，resultType属性指明查询返回的结果集类型resultType="me.gacl.domain.User"就表示将查询结果封装成一个User类的对象返回User类就是users表所对应的实体类--><!-- 根据id查询得到一个user对象--><resultMap type="Blog" id="blogResultMap"><id column="id" property="id" jdbcType="INTEGER"></id><result column="authod_id" property="authodId" jdbcType="INTEGER"/></resultMap><select id="selectBlog" parameterType="int" resultType="Blog">select id,title,authod_id as authodId,state,featured,stylefrom Blog where id=#{id}</select> <select id="selectBlog2" parameterType="int" resultMap="blogResultMap">select *from Blog where id=#{id}</select><select id="selectBlogByTitle" parameterType="String" resultMap="blogResultMap">select * from Blog where title like #{title}</select><select id="selectBlogByTitle2" parameterType="String" resultMap="blogResultMap">select * from Blog where title like '${value}'</select><select id="selectBlogBySort" parameterType="String" resultMap="blogResultMap">select * from Blog order by ${value}</select><select id="selectBlogByPage" resultMap="blogResultMap">select * from Blog limit #{0},#{1}</select><select id="selectBlogByPage1" resultMap="blogResultMap">select * from Blog limit #{offset},#{pagesize}</select><select id="selectBlogByPage2" resultMap="blogResultMap">select * from Blog limit #{offset},#{pagesize}</select><insert id="insertBlog" parameterType="Blog" useGeneratedKeys="true" keyProperty="id">INSERT INTO Blog(title,authod_id,state,featured,style)VALUES(#{title},#{authodId},#{state},#{featured},#{style})</insert><insert id="insertBlogOracle" parameterType="Blog" ><selectKey resultType="java.lang.Integer" order="BEFORE" keyProperty="id">select seq.nextval as id from dual</selectKey>INSERT INTO Blog(title,authod_id,state,featured,style)VALUES(#{title},#{authodId},#{state},#{featured},#{style})</insert><insert id="insertBlogMysql" parameterType="Blog" ><selectKey resultType="java.lang.Integer" order="AFTER" keyProperty="id">SELECT LAST_INSERT_ID()</selectKey>INSERT INTO Blog(title,authod_id,state,featured,style)VALUES(#{title},#{authodId},#{state},#{featured},#{style})</insert><update id="updateBlog" parameterType="Blog" >UPDATE BlogSETtitle = #{title},authod_id = #{authodId},state = #{state},featured = #{featured},
style= #{ style}WHERE id = #{id}</update>
</mapper>
com.geyao.mybatis.pojo
Blog类
package com.geyao.mybatis.pojo;public class Blog {private Integer id;private String title;private int authodId;private String state;private Boolean featured;private String style;public Blog() {super();this.title="未命名";this.authodId=4;this.state="NOT";this.featured=false;this.style="red"; }public Integer getId() {return id;}public void setId(Integer id) {this.id = id;}public String getTitle() {return title;}public void setTitle(String title) {this.title = title;}public int getAuthodId() {return authodId;}public void setAuthodId(int authodId) {this.authodId = authodId;}public String getState() {return state;}public void setState(String state) {this.state = state;}public Boolean getFeatured() {return featured;}public void setFeatured(Boolean featured) {this.featured = featured;}public String getStyle() {return style;}public void setStyle(String style) {this.style = style;}@Overridepublic String toString() {return "Blog [id=" + id + ", title=" + title + ", authodId=" + authodId + ", state=" + state + ", featured="+ featured + ", style=" + style + "]\n";}}
com.geyao.mybatis.util
MybatisUtil类
package com.geyao.mybatis.util;import java.io.InputStream;
import java.io.Reader;import org.apache.ibatis.io.Resources;
import org.apache.ibatis.session.SqlSession;
import org.apache.ibatis.session.SqlSessionFactory;
import org.apache.ibatis.session.SqlSessionFactoryBuilder;public class MyBatisUtil {private static SqlSessionFactory sqlSessionFactory =null;static {try {InputStream in = Resources.getResourceAsStream("mybatis-config.xml");sqlSessionFactory = new SqlSessionFactoryBuilder().build(in);} catch (Exception e) {// TODO Auto-generated catch blocke.printStackTrace();}}private MyBatisUtil() {}public static SqlSession getSqlSession() {return sqlSessionFactory.openSession();}
}
log4j.properties
### \u914D\u7F6E\u6839 ###
log4j.rootLogger = debug,console ,fileAppender,dailyRollingFile,ROLLING_FILE,MAIL,DATABASE### \u8BBE\u7F6E\u8F93\u51FAsql\u7684\u7EA7\u522B\uFF0C\u5176\u4E2Dlogger\u540E\u9762\u7684\u5185\u5BB9\u5168\u90E8\u4E3Ajar\u5305\u4E2D\u6240\u5305\u542B\u7684\u5305\u540D ###
log4j.logger.org.apache=dubug
log4j.logger.java.sql.Connection=dubug
log4j.logger.java.sql.Statement=dubug
log4j.logger.java.sql.PreparedStatement=dubug
log4j.logger.java.sql.ResultSet=dubug### \u914D\u7F6E\u8F93\u51FA\u5230\u63A7\u5236\u53F0 ###
log4j.appender.console = org.apache.log4j.ConsoleAppender
log4j.appender.console.Target = System.out
log4j.appender.console.layout = org.apache.log4j.PatternLayout
log4j.appender.console.layout.ConversionPattern = %d{ABSOLUTE} %5p %c{1}:%L - %m%nmybatis-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><typeAliases><typeAlias type="com.geyao.mybatis.pojo.Blog" alias="Blog"/>
</typeAliases><environments default="development"><environment id="development"><transactionManager type="JDBC" /><!-- 配置数据库连接信息 --><dataSource type="POOLED"><property name="driver" value="com.mysql.cj.jdbc.Driver" /><property name="url" value="jdbc:mysql://localhost:3306/mybatis?serverTimezone=GMT%2B8" /><property name="username" value="root" /><property name="password" value="123" /></dataSource></environment></environments><mappers><!-- 注册userMapper.xml文件， userMapper.xml位于me.gacl.mapping这个包下，所以resource写成me/gacl/mapping/userMapper.xml--><mapper resource="com/geyao/mybatis/mapper/BlogMapper.xml"/></mappers>
</configuration>
单元测试
com.geyao.mybatis.util
testSelectBlog类
package com.geyao.mybatis.mapper;import java.util.Arrays;
import java.util.HashMap;
import java.util.List;
import java.util.Map;import org.apache.ibatis.session.SqlSession;
import org.junit.Test;import com.geyao.mybatis.pojo.Blog;
import com.geyao.mybatis.util.MyBatisUtil;public class testSelectBlog {@Testpublic void testSelectBlogNoInterface() {SqlSession session =MyBatisUtil.getSqlSession();Blog blog =(Blog)session.selectOne("com.geyao.mybatis.mapper.BlogMapper.selectBlog", 1);session.close();System.out.println(blog);}
@Test
public void testSelectBlog() {SqlSession session =MyBatisUtil.getSqlSession();BlogMapper blogMapper =session.getMapper(BlogMapper.class);Blog blog = blogMapper.selectBlog(1);System.out.println(blog);
}@Test
public void testSelectBlog2() {SqlSession session =MyBatisUtil.getSqlSession();BlogMapper blogMapper =session.getMapper(BlogMapper.class);Blog blog = blogMapper.selectBlog2(1);System.out.println(blog);
}
@Test
public void testselectBlogByTitle() {SqlSession session =MyBatisUtil.getSqlSession();BlogMapper blogMapper =session.getMapper(BlogMapper.class);List<Blog> blogList = blogMapper.selectBlogByTitle("%g%");System.out.println(blogList);
}@Test
public void testselectBlogByTitle2() {SqlSession session =MyBatisUtil.getSqlSession();BlogMapper blogMapper =session.getMapper(BlogMapper.class);List<Blog> blogList = blogMapper.selectBlogByTitle2("%g%");System.out.println(blogList);
}
@Test
public void testselectBlogBySort() {SqlSession session =MyBatisUtil.getSqlSession();BlogMapper blogMapper =session.getMapper(BlogMapper.class);List<Blog> blogList = blogMapper.selectBlogBySort("title");System.out.println(blogList);
}
@Test
public void testselectBlogByPage() {SqlSession session =MyBatisUtil.getSqlSession();BlogMapper blogMapper =session.getMapper(BlogMapper.class);List<Blog> blogList = blogMapper.selectBlogByPage(2,2);System.out.println(blogList);
}
@Test
public void testselectBlogByPage1() {SqlSession session =MyBatisUtil.getSqlSession();BlogMapper blogMapper =session.getMapper(BlogMapper.class);List<Blog> blogList = blogMapper.selectBlogByPage1(2,2);System.out.println(blogList);
}
@Test
public void testselectBlogByPage2() {SqlSession session =MyBatisUtil.getSqlSession();BlogMapper blogMapper =session.getMapper(BlogMapper.class);Map<String, Object> map =new HashMap<String, Object>();map.put("offset", 2);map.put("pagesize", 2);List<Blog> blogList = blogMapper.selectBlogByPage2(map);System.out.println(blogList);
}@Test
public void testInsertBlog() {SqlSession session =MyBatisUtil.getSqlSession();BlogMapper blogMapper =session.getMapper(BlogMapper.class);Blog blog=new Blog();int count= blogMapper.insertBlog(blog);session.commit();session.close();System.out.println(blog);System.out.println("插入的"+count+"记录");
}@Test
public void testinsertBlogMysql() {SqlSession session =MyBatisUtil.getSqlSession();BlogMapper blogMapper =session.getMapper(BlogMapper.class);Blog blog=new Blog();int count= blogMapper.insertBlogMysql(blog);session.commit();session.close();System.out.println(blog);System.out.println("插入的"+count+"记录");
}@Test
public void testupdateBlog() {SqlSession session =MyBatisUtil.getSqlSession();BlogMapper blogMapper =session.getMapper(BlogMapper.class);Blog blog = blogMapper.selectBlog(1);//Blog blog=new Blog();blog.setId(1);blog.setTitle("geyao");blog.setAuthodId(3);//blog.setStyle("balck");//blog.setState("active");//blog.setFeatured(false);//blog.setAuthodId(2);int count= blogMapper.updateBlog(blog);session.commit();session.close();System.out.println(blog);System.out.println("修改"+count+"记录");
}
@Test
public void testdeleteBlogById() {SqlSession session =MyBatisUtil.getSqlSession();BlogMapper blogMapper =session.getMapper(BlogMapper.class);int count= blogMapper.deleteBlogById(3);session.commit();session.close();System.out.println("删除的"+count+"记录");
}
@Test
public void testselectActiveBlogByTitle() {SqlSession session =MyBatisUtil.getSqlSession();BlogMapper blogMapper =session.getMapper(BlogMapper.class);List<Blog> blogList=blogMapper.selectActiveBlogByTitle("o");session.close();System.out.println(blogList);
}
@Test
public void testselectActiveBlogByTitleOrStyle() {SqlSession session =MyBatisUtil.getSqlSession();BlogMapper blogMapper =session.getMapper(BlogMapper.class);Blog blog = new Blog();blog.setTitle("%o%");blog.setStyle("black");List<Blog> blogList=blogMapper.selectActiveBlogByTitleOrStyle(blog);session.close();System.out.println(blogList);
}
@Test
public void testselectBlogByCondition() {SqlSession session =MyBatisUtil.getSqlSession();BlogMapper blogMapper =session.getMapper(BlogMapper.class);Blog blog = new Blog();blog.setTitle("%o%");List<Blog> blogList=blogMapper.selectBlogByCondition(blog);session.close();System.out.println(blogList);
}
@Test
public void tesupdateBlogByCondition() {SqlSession session =MyBatisUtil.getSqlSession();BlogMapper blogMapper =session.getMapper(BlogMapper.class);Blog blog = blogMapper.selectBlog(1);//Blog blog=new Blog();blog.setId(1);blog.setTitle("geyaonice");blog.setAuthodId(3);//blog.setStyle("balck");//blog.setState("active");//blog.setFeatured(false);//blog.setAuthodId(2);int count= blogMapper.updateBlogByCondition(blog);session.commit();session.close();System.out.println(blog);System.out.println("修改"+count+"记录");
}
@Test
public void testselectBlogByConditionTrim() {SqlSession session =MyBatisUtil.getSqlSession();BlogMapper blogMapper =session.getMapper(BlogMapper.class);Blog blog = new Blog();blog.setTitle("%o%");List<Blog> blogList=blogMapper.selectBlogByConditionTrim(blog);session.close();System.out.println(blogList);
}
@Test
public void tesupdateBlogByConditionTrim() {SqlSession session =MyBatisUtil.getSqlSession();BlogMapper blogMapper =session.getMapper(BlogMapper.class);Blog blog = blogMapper.selectBlog(1);//Blog blog=new Blog();blog.setId(1);blog.setTitle("geyaonice");blog.setAuthodId(3);//blog.setStyle("balck");//blog.setState("active");//blog.setFeatured(false);//blog.setAuthodId(2);int count= blogMapper.updateBlogByConditionTrim(blog);session.commit();session.close();System.out.println(blog);System.out.println("修改"+count+"记录");
}
@Test
public void testdeleteBlogList() {SqlSession session =MyBatisUtil.getSqlSession();BlogMapper blogMapper =session.getMapper(BlogMapper.class);List<Integer> ids=Arrays.asList(2,3,4);int count= blogMapper.deleteBlogList(ids);session.commit();session.close();System.out.println("删除"+count+"记录");
}
//--------一级缓存
@Test
public void testSelectBlogCacheLevelOne1() {SqlSession session =MyBatisUtil.getSqlSession();BlogMapper blogMapper =session.getMapper(BlogMapper.class);Blog blog1=blogMapper.selectBlog(1);System.out.println("结果已查询");Blog blog2=blogMapper.selectBlog(2);System.out.println("结果已查询");session.close();System.out.println("session关闭");}
@Test
public void testSelectBlogCacheLevelOne2() {SqlSession session =MyBatisUtil.getSqlSession();BlogMapper blogMapper =session.getMapper(BlogMapper.class);Blog blog1=blogMapper.selectBlog(1);System.out.println("结果已查询");blog1.setFeatured(true);blogMapper.updateBlog(blog1);System.out.println("刷星缓存");Blog blog2=blogMapper.selectBlog(2);System.out.println("重新执行查询");session.close();System.out.println("session关闭");}
//二级缓存------
@Test
public void testSelectBlogCacheLevelTwo1() {SqlSession session1 =MyBatisUtil.getSqlSession();BlogMapper blogMapper1 =session1.getMapper(BlogMapper.class);Blog blog1=blogMapper1.selectBlog(1);System.out.println("结果已查询");session1.close();SqlSession session2 =MyBatisUtil.getSqlSession();BlogMapper blogMapper2 =session2.getMapper(BlogMapper.class);Blog blog2=blogMapper2.selectBlog(1);System.out.println("结果已查询");session2.close();System.out.println("session关闭");}
}
jar包
链接：https://pan.baidu.com/s/1g6NgzfLc5uK9S4VL-03lHg
提取码：4r2m
运行结果
mybatis学习(44):二级缓存1相关推荐
- MyBatis学习系列——二级缓存
[MyBatis学习13]MyBatis中的二级缓存 发表于2016/6/16 7:26:19 4922人阅读 分类: ● 框架技术 --[MyBatis] 1. 二级缓存的原理 前面介绍了,myb ...
- mybatis学习(46):二级缓存被刷新的情况
目录结构 com.geyao.mybatis.mapper BlogMapper类 package com.geyao.mybatis.mapper;import java.util.List; im ...
- 【MyBatis学习8】MyBatis中的二级缓存
1. 二级缓存的原理 前面介绍了,mybatis中的二级缓存是mapper级别的缓存,值得注意的是,不同的mapper都有一个二级缓存,也就是说,不同的mapper之间的二级缓存是互不影响的.为了更加 ...
- 【MyBatis学习13】MyBatis中的二级缓存
1. 二级缓存的原理 前面介绍了,mybatis中的二级缓存是mapper级别的缓存,值得注意的是,不同的mapper都有一个二级缓存,也就是说,不同的mapper之间的二级缓存是互不影响的.为了更加 ...
- Mybatis自定义分布式二级缓存实现与遇到的一些问题解决方案!
Mybatis自定义分布式二级缓存实现与遇到的一些问题解决方案! 参考文章: (1)Mybatis自定义分布式二级缓存实现与遇到的一些问题解决方案! (2)https://www.cnblogs.co ...
- MyBatis中的二级缓存
MyBatis中的二级缓存 1. 二级缓存的原理 前面介绍了,mybatis中的二级缓存是mapper级别的缓存,值得注意的是,不同的mapper都有一个二级缓存,也就是说,不同的mapper之间的二 ...
- mybatis学习8之缓存
mybatis缓存 MyBatis 内置了一个强大的事务性查询缓存机制,当你查询了一次数据时,他会保存到缓存中,当你第二次查询这个数据时,它不会去数据库查找,而是直接从缓存中去取! 一级缓存 默认情况 ...
- Mybatis3.4.x技术内幕（二十二）：Mybatis一级、二级缓存原理分析
2019独角兽企业重金招聘Python工程师标准>>> Mybatis的一级缓存,指的是SqlSession级别的缓存,默认开启:Mybatis的二级缓存,指的是SqlSession ...
- MyBatis笔记——EhCache二级缓存
介绍 ehcache是一个分布式缓存框架. 我们系统为了提高系统并发,性能.一般对系统进行分布式部署(集群部署方式) 不使用分布缓存,缓存的数据在各各服务单独存储,不方便系统开发.所以要使用分布式缓 ...
最新文章
- scratch小游戏脚本大全_酷酷带你一起做小游戏--跳一跳
- 基数排序算法图解分析
- 软件压力测试linux服务器,使用http_load来给Linux系统的服务器做压力测试
- 自由群，外代数和泛包络代数
- python 的 购物小程序
- [Bzoj2243][SDOI2011]染色(线段树树剖)
- 解决JPA的枚举局限性
- 人民用不起的共享充电宝，可能还被植入了木马，这三类要慎用！
- Python之网络爬虫（爬虫基本认知、网络爬虫之路）
- java实现行政区域划分_java解析中国行政区域并在页面显示实现动态逐级筛选
- 王者荣耀服务器不稳定总是跳频,vivo iQOO Pro 5G手机打玩王者荣耀网络不稳定出现断流...
- Sentry For Vue 完整接入详解(2021 Sentry v21.8.x)前方高能预警！三万字，慎入！
- 用计算机制作多媒体作品使用的素材都必须,制作多媒体作品（选择题）.doc
- （linux-x86-ARM）麒麟V10安装DBeaver21.3通用的数据库管理工具和 SQL 客户端
- 数据结构(王道版本，主讲人:闲鱼学长)P19-P31
- CMMI之功能点估算法：EI 、EQ、EO
- hdu 4466 Triangle dp+数学
- 中职计算机应用基础教案1,中职计算机应用基础教案
- 思科网络学院-网络互连-第八章
- 解决maven依赖冲突，这篇就够了！