jsp、js、Java互相传值的总结

</pre>1.java 变量转 jsp<p></p><p></p><pre code_snippet_id="1800145" snippet_file_name="blog_20160801_2_2452946" name="code" class="html"><% String value = request.getParameter("key");%>
<label><%=value %></label>

2.jsp 变量转 js

<input type="text" name="firstname">test</input>
<script>
var test = document.getElementById("firstname");
</script>

3.js 转 Java

//虚拟表单提交
var temp = document.createElement("form");
temp.action = URL;//提交的地址
temp.method = "post";//也可指定为get
temp.style.display = "none";
var opt = document.createElement("textarea");
opt.name = key;
opt.value = value;
temp.appendChild(opt);
document.body.appendChild(temp);
temp.submit();

//java 代码

String var = request.getParameter("key");//此时var的值就是value

4.jsp转Java

String var = request.getParameter("key");//jsp表单提交了，就可以从request中获取。也可以虚拟表单提交。

5.js转jsp

var test = "test";
document.getElementById("demo").innerHTML=test;

6.java 转 js

<% String temp = request.getParameter("key");%>
<label name="test" hidden="hidden"><%=temp %></label>
<script>
var temp = document.createElement("test");
</script>