struts2 file upload success message on same page using ajax
Question
我正在上载.csv文件并在同一页面上重定向，我想在同一页面上将显示文件成功上载消息。我不想使用ajax发送请求。我对struts框架是陌生的文件上传教程，但每个人都重定向到另一个页面并在其中显示消息。
2 answers
solution1
1 2014-09-17 09:08:14
After the upload (and in case of errors), dispatch the same page you come from:
Struts.xml
<action name="uploadPage" class="foo.bar.UploadAction">
<result>/upload.jsp</result>
<result name="input">/upload.jsp</result>
<result name="error">/upload.jsp</result>
</action>
<action name="doUpload" class="foo.bar.UploadAction" method="upload">
<result>/upload.jsp</result>
<result name="input">/upload.jsp</result>
<result name="error">/upload.jsp</result>
</action>
UploadAction
public class UploadAction extends ActionSupport {
File upload;
String uploadFileName;
String uploadContentType;
/* Getters and Setters for the above properties */
public String execute() {
return SUCCESS;
}
public String upload(){
try {
getService().upload(upload,uploadFileName,uploadContentType);
addActionMessage("Upload successfully completed");
return SUCCESS;
} catch (Exception e){
addActionError("Error while uploading: " + e.getMessage());
return ERROR;
}
}
}
upload.jsp
<body>
<s:if test="hasActionErrors()">
<s:actionerror />
</s:if>
<s:if test="hasActionMessages()">
<s:actionmessage />
</s:if>
<s:form action="doUpload" enctype="multipart/form-data">
<s:file name="upload" />
<s:submit />
<s:form>
</body>
This is basic, then you may want to alter the URL or use Post Redirect Get or Tokens etc.. to prevent the user to resubmit the file when refreshing.
solution2
1 ACCPTED 2015-02-27 14:37:34
set ActionError in your action(if file doesnt meet your criteria) using
addActionError("file not uploaded something went wrong");
otherwise set action message
addActionMessage("Upload successfully completed");
jsp page.
<body>
<s:actionerror />
<s:actionmessage />
<s:form action="uploadAction" >
<s:file name="filename" />
<s:submit />
<s:form>
</body>
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