执行是刷新JSP页面

Question

我

正在写包含一个按钮，一个jsp页面，我把代码中的scriptlet

每一件事情是运行好后，但经过反复的时候我刷新页面代码再次执行而不点击按钮。所以我想摆脱这一点。

这里是我的JSP代码：

<% 
if (request.getParameter("btnSubmit") != null) //btnSubmit is the name of your  

    button,not id of that button. 
    { 

String className = request.getParameter("testclass"); 
System.out.println(className); 
String[] command = {"CMD", "/C", "mvn -Dtest=" + className + " test"}; 
ProcessBuilder probuilder = new ProcessBuilder(command); 

//You can set up your work directory 
probuilder.directory(new File("C:\\Users\\Amira\\junoWorkspace\\TestProjectUI")); 

Process process = probuilder.start(); 

//Read out dir output 
java.io.InputStream is = process.getInputStream(); 
InputStreamReader isr = new InputStreamReader(is); 
BufferedReader br = new BufferedReader(isr); 
String line; 
System.out.printf("Output of running %s is:\n", Arrays.toString(command)); 
while ((line = br.readLine()) != null) { 
    System.out.println(line); 
} 

//Wait to get exit value 
try { 
    int exitValue = process.waitFor(); 
    System.out.println("\n\nExit Value is " + exitValue); 
} catch (InterruptedException e) { 
    // TODO Auto-generated catch block 
    e.printStackTrace(); 
} 
} 
%> 

    <html:file properties="tonFichier" name="tonForm"/> 


    <p> Please specify a Test :<br> 
     <input type="file" name="testclass" size="40" > 
    </p> 
    <div> 
     <input type="submit" id="btnSubmit" name="btnSubmit" value="Execute Test"/> 

    </div> 
    </form> 
</body> 

任何想法可以理解 谢谢

Answer 1

我觉得FORM方法是GET。你应该做的Form方法POST。

<FORM action="....." method="post"> 

GET是幂等要求，它可以让浏览器上的刷新自动做出请求。然而，

POST是不幂等它可以让浏览器显示弹出询问类似Do you want to submit the request again.