// 创建实现了mapperInterface接口的动态代理对象,这里使用的InvocationHandler 实现是MapperProxy return (T) Proxy.newProxyInstance(mapperInterface.getClassLoader(), new Class[]{mapperInterface}, mapperProxy); } 1. 2. 3. 4. 5. MapperProxy 通过分析 MapperProxyFactory 这个工厂类,我们可以清晰地看到Mapper...
public interface UserMapper { public List<User> findAll(); public User findById(int id); } 1. 2. 3. 4. 5. 6. InputStream resourceAsStream = Resources.getResourceAsStream("sqlMapConfig.xml"); SqlSessionFactory sqlSessionFactory = new SqlSessionFactoryBuilder().build(resourceAsStream); SqlSessi...
publicSqlCommand(Configuration configuration, Class<?> mapperInterface, Method method){// 获取Mapper接口中对应的方法名称finalStringmethodName=method.getName();// 获取Mapper接口的类型finalClass<?> declaringClass = method.getDeclaringClass();// 将Mapper接口名称和方法名称拼接起来作为SQL语句唯一标识,// 到C...
UserMapper接口: publicinterfaceUserMapper {voidinsertBatch(List<User>userList); } UserMapper.xml配置: <?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"><!--namespace:这里使用Mapper映射代...
public interface MoneyMapper { /** * 保存数据,并保存主键id * * @param po * @return int */ @Options(useGeneratedKeys = true, keyProperty = "po.id", keyColumn = "id") @Insert("insert into money (name, money, is_deleted) values (#{po.name}, #{po.money}, #{po.isDeleted})") ...
configuration.addMapper(mapperInterface); } else { throw new BuilderException( "A mapper element may only specify a url, resource or class, but not more than one."); } } } } } 遍历<mapper />标签的子节点 如果是<package />子节点,则获取package属性,对该包路径下的Mapper接口进行解析 否的的...
简介:【Java异常】使用通用Mapper ,报There is no getter for property named ‘distinct‘ in ‘class 错 一、报错信息 Caused by: org.apache.ibatis.reflection.ReflectionException: There is no getter for property named 'distinct' in 'class com.uiotsoft.subsite.mybatis.model.TCmsSite' ...
/** * @author : xjszsd * @date : 2021-12-13 16:20 */publicinterfaceIAccountDao{//返回一条记录的map;key就是列名,值就是对应的值Map<String,Object>selectAll(Integer id);/** * 此处若将map的key的类型改为其他类型,不影响@MapKey给map的key赋值 * @return */@MapKey("name")//指定数据库...
InstantiationException | InvocationTargetException | NoSuchMethodException e) { throw new RuntimeException(e); } } else { // 如果不是接口中定义的default方法,创建MapperMethodInvoker实现类PlainMethodInvoker,在此之前也会创建MapperMethod return new PlainMethodInvoker(new MapperMethod(mapperInterface, method, ...
public T newInstance(SqlSession sqlSession) {//首先实例化得到一个MapperProxy,然后创建得到其代理对象final MapperProxy<T> mapperProxy = new MapperProxy<T>(sqlSession, mapperInterface, methodCache);return newInstance(mapperProxy);} 代码解释如下: