truts的出现就是为了全面消除服务器断程序的脚本嵌套,全面分层，通常我们的表单在提交时都需要进行数据验证，而这在以前通常是用客户端的javascr ipt进行过滤后再由服务器端的脚本进行验证，这样的缺点是移植性很差，每次都需要重新编写源程序，而struts框架则提供了一个很好的验证机制，它不需要再编写脚本，而是通过验证器进行验证。-truts is to fully eliminate the appearance of the scr ipt off the server nested, fully layered, often when our form requires the submission of data validation, which is usually used in the previous javascr ipt client to filter and then again from the server side scr ipt to verify that the disadvantage of poor portability, need to be rewritten each time the source, while the struts fr a mework provides a good authentication mechanism, it does not require re-writing the scr ipt, but through the validator for validation.