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:

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

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

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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