使用form的target属性屏蔽url跳

target:

指定公开赛， action URL。

关键点:

让target指向隐藏的iframe

demo:

form.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
<script type="text/javascript">
	function doSave(){
		var param = "?
method=add";
		testForm.action='handler.jsp' + param ;
		testForm.submit();
	}
</script>

</head>
<body>
<form id="testForm" name="testForm" method="post" target="sub_frame">
id:<input type="text" name="id"><input type="button" value="提交" onclick="doSave();">
<iframe id="sub_frame" name="sub_frame" height="0" width="0" frameborder="0" marginheight="0" marginwidth="0" ></iframe>
</form>
<br/>id值:
<input id="content" name="content" type="text">
</body>
</html>

handler.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<%
String method=request.getParameter("method");
if("add".equals(method)){
	String id =request.getParameter("id");
	out.println("<script type='text/javascript'>");
	out.println("parent.document.getElementById('content').value='"+id+"';");
	out.println("</script>");
}
%>