如何使用javascript向服务器提交数据

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#热议# 为什么说不要把裤子提到肚脐眼？

huanglenzhi
推荐于2017-10-07 · 知道合伙人数码行家

huanglenzhi
知道合伙人数码行家

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长期从事计算机组装，维护，网络组建及管理。对计算机硬件、操作系统安装、典型网络设备具有详细认知。

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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。

[javascript] view 
plaincopyprint?

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);  

}  
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);
}

[html] view 
plaincopyprint?

<body>  

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

[java] view 
plaincopyprint?

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();  

    }  
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

[html] view 
plaincopyprint?

<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>  
<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>

[javascript] view 
plaincopyprint?

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);  

}  
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);
}

[html] view 
plaincopyprint?

<%@ 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>


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柯方010
2014-12-08 · 超过27用户采纳过TA的回答

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ajax方法，或者form表单自带的提交方法

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