How to submit form in jsp

Speaking of JSP, of course submission of forms is indispensable. Summarize several methods of submitting forms in JSP.

Recommended course: Java Tutorial.

Submit via the

button

This method is the most traditional way to submit a form, which is to pass all the form values ​​to the url interface.

<%@ page language="java" contentType="text/html; charset=GB18030"
    pageEncoding="GB18030"%>
<meta http-equiv="Content-Type" content="text/html; charset=GB18030">
<title>Insert title here</title>
    <h1>测试servlet</h1>
    <hr>
        <form action="servlet/TestServlet" method="post" dir="ltr">
            <input name="userID" type="text"><br>
            <input value="查询" type="submit"><br>
        </form>

Pass

Here is the pass onclick triggers the js event, and then we can write some transmission methods in function onSubmit(){}, the more typical one is ajax transmission:

var j$ = jQuery.noConflict();//注册jQuery
function onSubmit(){
    j$.ajax({
        type:"get",
        url:"fix_project_contrast_do.jsp",
        data:{
            fixitem_id : j$("#fixitem_id").val(),
            check_man : j$("#check_man").val()
        },
        success:function(ret){
            if(ret == 1) {
                alert("提交审核成功!");
            }else{
                alert(ret);
                
            }
            window.returnValue=true;
            window.close();
        }
    });
}

Then we can process it in fix_project_contrast_do.jsp

<%@ page contentType="text/html; charset=GBK"  import="相应的类路径" %>

<%
try{
    
    Integer fixitem_id = Utility.trimNull(request.getParameter("fixitem_id")), new Integer(0));
    Integer check_man = Utility.parseInt(Utility.trimNull(request.getParameter("check_man")), new Integer(0));
    //处理逻辑省略
    out.clear();
    response.getWriter().write("1");//response相应值
}catch(Exception e){
    out.clear();
    response.getWriter().write(e.getMessage());
}

%>

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