Nuan_Feng的博客

背景之前ebean简单的 @DbEnumValue 注解就能支持通过value映射。mybatis也有支持，是 @EnumValue注解。分别支持二种映射规则。EnumOrdinalTypeHandler和EnumTypeHandlerEnumTypeHandler(默认)作用： @Override public void setNonNullParameter(PreparedStatement ps, int i, E parameter, JdbcType jdbcType) thr

demo地址 public static void main(String[] args) throws Exception { Reader reader = Resources.getResourceAsReader("mybatis/SqlMapconfig.xml"); SqlSessionFactory sqlSessionFactory = new SqlSessionFactoryBuilder().build(reader); SqlSess

拦截器public interface Interceptor {//执行拦截逻辑的方法 Object intercept(Invocation invocation) throws Throwable;//决定是否触发intercept （）方法 default Object plugin(Object target) { return Plugin.wrap(target, this); }//根据配置初始化Interceptor 对象 default void setP

xpath解析xmlpublic class XPathParser { private final Document document; //是否开启验证 private boolean validation; //加载本地DTD private EntityResolver entityResolver; //Properties标签定义值 private Pr...

session 一级缓存优化/** * Copyright 2009-2020 the original author or authors. * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the

MyBatis 初始化SqlSessionFactoryBuilderpublic class SqlSessionFactoryBuilder {public SqlSessionFactory build(InputStream inputStream, String environment, Properties properties) { try { //读取配置文件 XMLConfigBuilder parser = new XMLConfigBuilder(

xpath解析xmlpublic class XPathParser { private final Document document; //是否开启验证 private boolean validation; //加载本地DTD private EntityResolver entityResolver; //Properties标签定义值 private Pr...

单例模式利用static的特性,类加载器只会加载一次同时上锁的特性,实现懒加载.public abstract class VFS { private static class VFSHolder { static final VFS INSTANCE = createVFS(); @SuppressWarnings("unchecked") static VFS createVFS() { // Try the user implementations fi

dom<?xml version="1.0" encoding="UTF-8" standalone="no"?><exam> <Student examid="22" idcard="01"> <name value="zhangsan">张三</name> <location>湖北...

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