用Javascript向服务器发送数据

第一种方式是，点击链接，触发一个js函数，在该函数内，用dom生成表单和输入框，将值赋在表单里，提交表单。

function postwith(to, p) {  
    var myForm = document.createElement("form");  
    myForm.method = "post";  
    myForm.action = to;  
    for ( var k in p) {  
        var myInput = document.createElement("input");  
        myInput.setAttribute("name", k);  
        myInput.setAttribute("value", p[k]);  
        myForm.appendChild(myInput);  
    }  
    document.body.appendChild(myForm);  
    myForm.submit();  
    document.body.removeChild(myForm);  
}

<body>  
   <a href="javascript:postwith('save',{'currentPage':'2','xisuo':'计算机'})">use js to post</a>

save是个servlet

public class save extends HttpServlet {  
  
    public void doPost(HttpServletRequest request, HttpServletResponse response)  
            throws ServletException, IOException {  
        request.setCharacterEncoding("utf-8");  
        String currentPage = request.getParameter("currentPage");  
        String xisuo = request.getParameter("xisuo");  
          
        System.out.println(currentPage+"---"+xisuo);  
          
        response.setContentType("text/html");  
        PrintWriter out = response.getWriter();  
        out.println("<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.01 Transitional//EN\">");  
        out.println("<HTML>");  
        out.println("  <HEAD><TITLE>A Servlet</TITLE></HEAD>");  
        out.println("  <BODY>");  
        out.print("    This is ");  
        out.print(this.getClass());  
        out.println(", using the POST method1111111111");  
        out.println("  </BODY>");  
        out.println("</HTML>");  
        out.flush();  
        out.close();  
    }

第二种是用表单

<body>  
    <form name="form1" action="post-data-result.jsp" method="post">  
        <input name="post_data" type="text"></input>  
        <input type="button" onclick="postData()" value="提交"></input>  
    </form>  
    <form name="form2" action="post-data-result.jsp" method="post">  
        <input name="post_data" type="text"></input>  
        <input type="button" onclick="postData()" value="提交"></input>  
    </form>  
    <form name="form3" action="post-data-result.jsp" method="post">  
        <input name="post_data" type="text"></input>  
        <input type="button" onclick="postData()" value="提交"></input>  
    </form>  
  </body>

function postData(){  
    var myForm = document.createElement("form");  
    myForm.method = "post";  
    myForm.action = "post-data-result.jsp";  
    var inputs=document.getElementsByName("post_data");  
    var i;  
    for (i=0;i<inputs.length;i++) {  
        var myInput = document.createElement("input");  
        myInput.type = "text";  
        myInput.name="post_data";  
        myInput.value=inputs[i].value;  
        myForm.appendChild(myInput);  
    }  
    document.body.appendChild(myForm);  
    myForm.submit();  
    document.body.removeChild(myForm);  
}

<%@ 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>获得客户端数据</title>  
</head>  
<body>  
<%  
//这里设置的字符集要跟index.html中的charset一致  
request.setCharacterEncoding("utf-8");  
String[] text=request.getParameterValues("post_data");  
for(String t : text){  
out.print(t+"<br>");  
}  
%>  
</body>  
</html>

引用：http://www.cnblogs.com/landebug/archive/2012/03/06/2416660.html

posted @ 2017-02-11 10:59 LABCD 阅读(3005) 评论(0) 收藏举报

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用Javascript向服务器发送数据

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