Jsonp跨域使用

Jsonp是解决跨域问题的一个办法。在jsonp:"callback"是对应后台返回的值使用的。

客户端页面代码：

服务器接收代码：

package com.file;

import java.io.File;
import java.io.IOException;
import java.util.Iterator;
import java.util.List;

import javax.servlet.Servlet;
import javax.servlet.ServletConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServletRequest;

import org.apache.catalina.core.ApplicationContext;
import org.apache.tomcat.util.http.fileupload.FileItem;
import org.apache.tomcat.util.http.fileupload.FileItemFactory;
import org.apache.tomcat.util.http.fileupload.disk.DiskFileItemFactory;
import org.apache.tomcat.util.http.fileupload.servlet.ServletFileUpload;

public class UploadServlet implements Servlet {
	@Override
	public void destroy() {

	}

	@Override
	public ServletConfig getServletConfig() {
		return null;
	}

	@Override
	public String getServletInfo() {
		return null;
	}

	@Override
	public void init(ServletConfig arg0) throws ServletException {

	}

	@Override
	public void service(ServletRequest request, ServletResponse response)
			throws ServletException, IOException {
		String callback = request.getParameter("callback");
		System.out.println(request.getParameter("callback"));
		response.getWriter().print(callback+"({success:'successful'})");
	}
	private void createFolder(String path){
		File file = new File(path);
		if(!file.exists()){
			file.mkdirs();
		}
	}

}