JSP uses ajaxFileUpload. js to implement cross domain issues

Don't talk too much nonsense, just post the code for everyone.

The jsp code is as follows

$.ajaxFileUpload 
( 
{ 
url:'http://lh.abc.com:8080/gap/gap/fileUpload.do',// Server-side request address for file upload (native is fxb.abc.com )  
secureuri:false,//1 Set to false 
fileElementId:'file',// Of the file upload space id Attribute  <input type="file" id="file" name="file" /> 
dataType: 'jsonp',// Return value type  1 Set to json 
jsonp: 'jsoncallback', 
jsonpCallback:'success_jsonpCallback', 
function success_jsonpCallback(data) { 
alert("1"); 
}, 
success: function (data, status) // Server Success Response Handler  
{ 
alert(data.message);// Returned from the server json Take out in message Data in , Among them message For in struts2 Medium action Member variables defined in  
if(typeof(data.error) != 'undefined') 
{ 
if(data.error != '') 
{ 
alert(data.error); 
}else 
{ 
alert(data.message); 
} 
} 
}, 
error: function (data, status, e)// Server response failure handler  
{ 
alert(status); 
alert(e); 
} 
} 
)

Configuration file

<action name="fileUpload" class="com.gap.action.FileUploadAction" method="fileUpload">
<result type="json" name="success">
<param name="contentType">
text/html
</param>
</result>
<result type="json" name="error">
<param name="contentType">
text/html
</param>
</result>
</action>

The processing in action is as follows

public String fileUpload() throws Exception {
String path = ServletActionContext.getRequest().getRealPath("/upload1");
// String path = ConfigDataInfo.getConfigValue("imgServer");
try {
File f = this.getFile();
if (this.getFileFileName().endsWith(".exe")) {
message = " I'm sorry , The file format you uploaded is not allowed !!!";
} else {
FileInputStream inputStream = new FileInputStream(f);
FileOutputStream outputStream = new FileOutputStream(path + "/"
+ this.getFileFileName());
byte[] buf = new byte[1024];
int length = 0;
while ((length = inputStream.read(buf)) != -1) {
outputStream.write(buf, 0, length);
}
inputStream.close();
outputStream.flush();
message = " Upload succeeded ";
}
} catch (Exception e) {
e.printStackTrace();
message = " I'm sorry , File upload failed !!!!";
}
return SUCCESS;
}

Every cross-domain upload pictures, can be successfully uploaded to the server, but can not return information correctly, always enter error method, correct should enter success method