Question

这是我的jsp页面

<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
    pageEncoding="ISO-8859-1"%>
<!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=ISO-8859-1">
<title>Insert title here</title>
<script>
function getChoice(){
    var k=confirm("Do you want me to overwrite the existing file ?");
    return k;
}
</script>
</head>
<body style="background-color:powderblue;color:Tomato">
<center><form method="POST" action="saveagain">    
<h3>${message} </h3>
            <br> <br>
<input type="hidden" name="fname" value="${filename}">
<input type="hidden" name="fcontent" value="${filecontent}"> <br><br>
 <input type="button" value="Overwrite ?" onclick="choice=getChoice()"/>
<input type="submit" value="Submit ?"></form></center>
<br>
<br>
<center><b>${m}</b></center>
<br><br>
<center><a href="toupload">Click me to upload a file</a>  <br><br>
</center>
</body>
</html>

在上面的代码中，我想将确认弹出的结果输入变量＆＃34; choice＆＃34;。怎么做？

修改后的代码：

bean class：

package com.fss;

public class Choice {
 private String choice;
private String fname;
private String fcontent;

public String getChoice() {
    return choice;
}

public void setChoice(String choice) {
    this.choice = choice;
}

public String getFname() {
    return fname;
}

public void setFname(String fname) {
    this.fname = fname;
}

public String getFcontent() {
    return fcontent;
}

public void setFcontent(String fcontent) {
    this.fcontent = fcontent;
}


}

这是我的jsp页面：

<html>
<head>
<script>
function getUserChoice(){
    var k=confirm("Do you want me to overwrite the existing file ?");
    $('#choice').val(k);
    return k;
}
</script>
</head>
<body>
<center><h3>${message} </h3></center>
            <br>
  <center><form method="POST" action="saveagain">    
    <input type="hidden" name="fname" value="${filename}">
    <input type="hidden" name="fcontent" value="${filecontent}">
    <input type="hidden" name="choice" id="choice"> <br><br>
    <input type="submit" value="Overwrite ?" onclick="getUserChoice()"/></form></center>         
<center><a href="toupload">Click me to upload a file</a>  </center>
</body>
</html>

这是我的Controller类：

 @RequestMapping(value="/saveagain",method = RequestMethod.POST)    
 public ModelAndView fileUploading2(@ModelAttribute("ch") Choice ch) throws IOException{

     String ch1;
     String message="";
     ch1=ch.getChoice();
     System.out.println("popup result "+ch1);
     return new ModelAndView("fileUpload","message",message); 
 }

fname和fcontent值反映在控制器中。为什么选择价值没有反映在＆＃34; ch1＆＃34; ？

Answer 1

使用您的方法，您可以在getChoice（）函数中使用javascript将返回值（true / false）作为隐藏元素值并在服务器端检索

function getChoice() {
    var k=confirm("Do you want me to overwrite the existing file ?");
    $('#hidden_choice').val(k);
}


<!-- HTML element -->
<input type="hidden" name="choice" id="hidden_choice" />
<input id="button_id" type="button" value="Overwrite ?" onclick="getChoice()"/>

在服务器端，您可以使用@RequestParam来检索值。以下是示例代码：

 @RequestMapping(value="/saveagain",method = RequestMethod.POST)  
 public ModelAndView fileUploading2(@RequestParam("choice") Boolean ch) throws IOException {
      // do your thing with choice variable here
      System.out.println("Choice is: " + ch);
}

如果布尔值不起作用，请尝试使用String并手动将其转换为布尔值。

Answer 2

您可以在表单中创建一个变量，例如cofirmstatus。

<input type="hidden" name="cofirmstatus" id="cofirmstatus">

并将值设置为

function getChoice(){
    var k=confirm("Do you want me to overwrite the existing file ?");
    $('#cofirmstatus').val(k);
    return k;
}

因此，提交表单后，该值将在服务器端提供

修改

我按如下方式创建了JSP。服务器端无需更改。

<%@ page language="java" contentType="text/html; charset=ISO-8859-1" pageEncoding="ISO-8859-1"%> <!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=ISO-8859-1"> <title>Insert title here</title> <script type="text/javascript"> function submitForm(){ var k=confirm("Do you want me to overwrite the existing file ?"); document.myform.choice.value=k; document.myform.submit(); } </script> </head> <body style="background-color:powderblue;color:Tomato"> <center><form method="POST" action="saveagain" name="myform"> <h3>${message} </h3> <br> <br> <input type="hidden" name="fname" value="${filename}"> <input type="hidden" name="fcontent" value="${filecontent}"> <br><br> <input type="hidden" name="choice" id="choice"> <br><br> <input type="button" value="Overwrite ?" onclick="javascript:submitForm()"/> <input type="submit" value="Submit ?"></form></center> <br> <br> <center><b>${m}</b></center> <br><br> <center><a href="toupload">Click me to upload a file</a> <br><br> </center> </body> </html>

服务器上的两项操作输出：

popup result true popup result false

如何在弹簧MVC中将确认弹出的结果输入变量？

2 个答案: