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<!DOCTYPE configurationPUBLIC "-//mybatis.org//DTD Config 3.0//EN""http://mybatis.org/dtd/mybatis-3-config.dtd"> <!-- //引入资源文件 //properties配置属性 //其中jdbc.properties为数据库的相关信息，内容如下： //jdbc.driv

背景：使用mybatis注解配置SQL映射器原因：注解配置SQL映射器时，SQL语句写错了//@Insert("insert int t_student values(null,#{name},#{age})")@Insert("insert into t_student values(null,#{name},#{age})")public int insertStudent(S...

&lt;?xml version="1.0" encoding="UTF-8" ?&gt;&lt;!DOCTYPE mapperPUBLIC "-//mybatis.org//DTD Mapper 3.0//EN""http://mybatis.org/dtd/mybatis-3-mapper.dtd"&gt;&lt;mapper namespace="com.java

&lt;?xml version="1.0" encoding="UTF-8" ?&gt;&lt;!DOCTYPE mapperPUBLIC "-//mybatis.org//DTD Mapper 3.0//EN""http://mybatis.org/dtd/mybatis-3-mapper.dtd"&gt;&lt;mapper namespace="com.java

本篇文章包括：1. 处理CLOB、BLOB类型数据CLOB：大文本类型，比如小说 每个数据库的类型不同   clob MySQL中没有，使用longtext,longtext就是clobBLOB：二进制文件，比如图片、电影、音乐 MySQL中blob类型小，存的东西不大，一般使用longblob2. 输入多个输入参数：此种方式比较挫，一般不使用，通常使用hashmap传入参数3....

注解配置动态 SQL：@InsertProvider@UpdateProvider@DeleteProvider@SelectProvider项目代码：https://download.youkuaiyun.com/download/chpllp/10620024StudentDynaSqlProvider.java    目的是动态拼接SQLpackage com.java1234.m...

实现班级表跟学生表的一对多关系具体项目代码：https://download.youkuaiyun.com/download/chpllp/10619679两个entity：Student.javapackage com.java1234.model;public class Student { private Integer id; private String name; p...

实现学生表跟地址表的一对一关系具体项目代码：https://download.youkuaiyun.com/download/chpllp/10619240两个entityStudent.javapackage com.java1234.model;public class Student { private Integer id; private String name; pr...

具体工程代码参考：https://download.youkuaiyun.com/download/chpllp/10586096&lt;?xml version="1.0" encoding="UTF-8" ?&gt;&lt;!DOCTYPE mapperPUBLIC "-//mybatis.org//DTD Mapper 3.0//EN""http://mybatis.org/dtd/myba...

错误提示：### Error building SqlSession.### The error may exist in com/java1234/mappers/AddressMapper.xml### The error occurred while processing mapper_resultMap[AddressResult]### Cause: org.apache.ib

错误代码如下：org.apache.ibatis.exceptions.PersistenceException: ### Error querying database. Cause: java.lang.IllegalArgumentException: Mapped Statements collection does not contain value for com.java12

1. 配置log4j的配置文件log4j.rootLogger=info,appender1,appender2 //appender1,appender2 为输出的目标log4j.appender.appender1=org.apache.log4j.ConsoleAppender //appender1为控制台输出log4j.appender.appender2=org

报的错误：java.lang.NullPointerExceptionat org.eclipse.jdt.internal.junit4.runner.SubForestFilter.shouldRun(SubForestFilter.java:81)at org.junit.internal.runners.JUnit4ClassRunner.filter(JUnit4ClassRun

eclipse报错如下：cvc-complex-type.2.4.a: Invalid content was found starting with element 'async-supported'. One of '{"http://java.sun.com/xml/ns/javaee":init-param}' is expected. web.xml /MyBatisPro05/We

接口映射文件（StudentMapper.java，也可归类为dao层）如下：package com.java1234.mappers;import java.util.List;import com.java1234.model.Student;public interface StudentMapper { public int add(Student stude

使用注解配置SQL映射器缺点：方便优点：不够灵活，不支持所有的功能第一节：基本映射语句1，@Insert2，@Update3，@Delete4，@Select第二节：结果集映射语句@Results项目代码：https://download.youkuaiyun.com/download/chpllp/10617826StudentTest.javapackage com.ja...