jsp上传图片servlet代码

痛定思痛。 2022-06-10 01:23 191阅读 0赞

package com.starry.work;
    
    import java.io.File;
    import java.io.IOException;
    import java.util.Collection;
    
    import javax.servlet.ServletException;
    import javax.servlet.annotation.MultipartConfig;
    import javax.servlet.annotation.WebServlet;
    import javax.servlet.http.HttpServlet;
    import javax.servlet.http.HttpServletRequest;
    import javax.servlet.http.HttpServletResponse;
    import javax.servlet.http.Part;
    
    
    /**
     * Servlet implementation class Upload
     */
    @WebServlet("/Upload")
    @MultipartConfig//一定要写这个注释   不写这个注释 不成功
    public class Upload extends HttpServlet {
    	private static final long serialVersionUID = 1L;
           
        /**
         * @see HttpServlet#HttpServlet()
         */
        public Upload() {
            super();
            // TODO Auto-generated constructor stub
        }
    
    	/**
    	 * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
    	 */
    	protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
    		//先创建一个文件夹，用来存放上传的文件
    		String filedPath="D:"+File.separator+"file_upload"+File.separator+"img";
    		File file=new File(filedPath);
    		if(!file.exists()) {
    			file.mkdirs();//创建文件夹，如果file_upload不存在，就创建文件夹
    			//file.mkdir();//创建文件夹，如果file_upload不存在，img就不会创建成功
    		}
    		//创建一个part对象
    		Collection<Part> parts=request.getParts();
    		for (Part part : parts) {
    			String headerInfo= part.getHeader("content-disposition");
    		 String name=getFileName(headerInfo, part);
    		 if(name.equals("")) {
    			 continue;
    		 }
    		 part.write(filedPath+File.separator+name);
    		}
    		
    		
    	}
    
    	/**
    	 * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
    	 */
    	protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
    		// TODO Auto-generated method stub
    		doGet(request, response);
    	}
    	
    	public String getFileName(String headerInfo,Part part) {
    		String fileName[]=headerInfo.split(";");
    		String name="";
    		if(fileName.length==3) {
    			name=part.getSubmittedFileName();
    	
    		}
    		return name;
    	}
    }