XsqlFilterResult----动态生成sql语句的类，过滤一些为空的查询条件

DAO
XsqlBuilder用于可以动态构造sql语句,避免在构造sql时使用过多的 if 判断,与SafeSqlProcesser集成提供防止sql注入攻击,与DataModifier集成完成数据类型的转换
动态构造sql示例:

Java代码







String xsql = "select * from user where 1=1

/~ and username = {username} ~/

/~ and password = {password} ~/

/~ and age = [age] ~/

/~ and sex = [sex] ~/"

Map filters = new HashMap();

filters.put("username", "badqiu");

filters.put("age", "12");

filters.put("sex", "");

XsqlFilterResult result = xsqlBuilder.applyFilters(xsql,filters);

String xsql = "select * from user where 1=1
/~ and username = {username} ~/
/~ and password = {password} ~/
/~ and age = [age] ~/
/~ and sex = [sex] ~/"

Map filters = new HashMap();
filters.put("username", "badqiu");
filters.put("age", "12");
filters.put("sex", "");

XsqlFilterResult result = xsqlBuilder.applyFilters(xsql,filters);

构造生成的结果result.getXsql()将会等于

Sql代码







select * fromuserwhere 1=1 and username={username} and age=12

select * from user where 1=1 and username={username} and age=12

被过滤删除的段: /~ and password = {password} ~/这一段由于在filters中password不存在而没有被构造出来 /~ and sex = [sex] ~/由于sex的值为空串也没有被构造出来

最后result.acceptedFilters值

Java代码







Map acceptedFilters = result.getAcceptedFilters();

会等于:

{username=badqiu}

Map acceptedFilters = result.getAcceptedFilters();
会等于:
{username=badqiu}

相关符号介绍:
/~ segment... ~/ 为一个条件代码块 {key} 过滤器中起标记作用的key,作为后面可以替换为sql的?,或是hql的:username标记 [key] 将直接替换为key value
数据类型转换示例:
select * from user where and 1=1 /~ age={age?int} ~/ 将会将Map filters中key=age的值转换为int类型
项目地址:http://code.google.com/p/rapid-xsqlbuilder/
下载地址:http://rapid-xsqlbuilder.googlecode.com/files/xsqlbuilder-1.0.zip

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