1、修改返回值
<?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.item.mapper.ProductMapper"> <select id="GetInfo" resultType="java.util.Map"> select * from product <if test="productName!=null or productType!=null or productColor!=null "> where 1=1 </if> <!-- 模糊查询 --> <if test="productName!=null"> and productName like "%${productName}%" </if> <!-- 类型筛选 --> <if test="productType!=null"> and productType="${productType}" </if> <!-- 颜色筛选 --> <if test="productColor!=null"> and productColor="${productColor}" </if> </select> <update id="UpdateById"> update product set productTitle = "${productTitle}" where id=#{id} </update> </mapper>
2、创建【CamelHumpInterceptor】 文件
package com.item.interceptor; import org.apache.ibatis.executor.Executor; import org.apache.ibatis.mapping.MappedStatement; import org.apache.ibatis.plugin.*; import java.lang.reflect.Method; import java.util.Properties; @Intercepts({ @Signature( type = Executor.class,//指定要拦截的接口 method = "update",//设置拦截接口中的方法名 args = {MappedStatement.class,Object.class}//设置拦截方法的参数类型数组 ) }) public class MyBatisInterceptor implements Interceptor { /** * 获取被拦截器拦截对象的相关信息 * @param invocation * @return * @throws Throwable */ @Override public Object intercept(Invocation invocation) throws Throwable { //拦截目标 Object target = invocation.getTarget(); System.out.println("目标:"+target); //获取被拦截对象执行的方法 Method method = invocation.getMethod(); System.out.println("方法:"+method.getName()); //获取执行目标的中参数 Object[] args = invocation.getArgs(); for (Object o : args) { System.out.println("参数:"+o); } Object proceed = invocation.proceed(); System.out.println("继续:"+proceed); return proceed; } /** * 获取当前拦截对象 * @param target * @return */ @Override public Object plugin(Object target) { System.out.println("当前拦截对象"+target); return Plugin.wrap(target,this); } /** * 获取拦截器插件中的参数值 * @param properties */ @Override public void setProperties(Properties properties) { System.out.println("参数0："+properties.get("prop0")); System.out.println("参数1："+properties.get("prop1")); } }
执行返回效果：
