struts2的Action传参总结

最近在Struts2中配置action时，经常要在配置文件中给一个页面或者action传递若干个参数，如下面所示：

<action name="GetStudent" class="com.xy.StudentAction">
<wbr><wbr> &lt;result name="stu" type="redirect"&gt;</wbr></wbr>

<wbr><wbr><wbr><wbr><wbr><wbr><wbr> /orderFlow/student!get.action?stuId=<strong><span style="color:#ed1c24">${stuId}</span></strong></wbr></wbr></wbr></wbr></wbr></wbr></wbr>

<wbr><wbr> &lt;/result&gt;<wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><br> &lt;/action&gt;</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>

<wbr><wbr><wbr><wbr><wbr><wbr><wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>

stuId是我们通过url传递的一个参数名，stuId则是action中的一个实例变量，它具有相应的set和get方法。因为通常我只会传递一个，所以这样也没有问题。

<wbr></wbr>

有一次碰到了要传2个参数的情况了，我就按照以前的习惯这样写：stuId=${stuId}&type=${type}，结果报错,当然是eclipse里面的xml校验报错咯。

<wbr></wbr>

查了一下资料，又犯了经验注意错误啊。在xml文件中&是属于特殊字符的，如果想表示&这个字符，需要对其进行转义，因此我换了个写法，如下所示stuId=${stuId}&amp;type=${type}。

<wbr></wbr>

还有一种做法

<action name="addcontacter" class="contactAction" method="addContacter">
<wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr> &lt;result type="redirectAction"&gt;<br><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr> &lt;param name="actionName"&gt;contacter&lt;/param&gt;<br><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr> &lt;param name="con_id"&gt;${con_id}&lt;/param&gt;<br><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr> &lt;param name="name"&gt;${name}&lt;/param&gt;<br><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr> &lt;/result&gt;<br> &lt;/action&gt;</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>

<wbr></wbr>

参考博客：

http://blog.youkuaiyun.com/tiantian511/article/details/4421102

http://blog.sina.com.cn/s/blog_7ca4f305010125mf.html