java高拍儀前后臺(tái)處理案例

2bdenny 發(fā)布于2019-08-21 10:48 / 2308人閱讀

摘要：一前臺(tái)頁(yè)面捷易拍控件測(cè)試程序啟動(dòng)主啟動(dòng)副停止保存保存保存保存保存保存灰度圖參數(shù)設(shè)置設(shè)置去黑邊自動(dòng)矯正設(shè)置分辨率設(shè)置圖片壓縮率圖片壓縮率大小必須在之間創(chuàng)建目錄創(chuàng)建目錄成功刪除目錄刪除目錄成功刪除刪除文件成功測(cè)試啟動(dòng)主啟動(dòng)副停

一.前臺(tái)頁(yè)面:




捷易拍控件測(cè)試程序




    
        
    
    
         
         
        
         
         
         
         
        
        
        
        
        

        

        
        
        設(shè)置切黑邊
        自動(dòng)矯正
        分辨率:
        
        圖片壓縮率(1-100):

二.后臺(tái)頁(yè)面:(注意需要的jar包,commons-fileupload-1.3.jar,commons-io-2.4.jar)

package com.jaeyi;

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

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.apache.commons.fileupload.FileItem;
import org.apache.commons.fileupload.FileUploadException;
import org.apache.commons.fileupload.disk.DiskFileItemFactory;
import org.apache.commons.fileupload.servlet.ServletFileUpload;



public class UploadServlet extends HttpServlet {
    
    private static final long serialVersionUID = 1L;
    
    private String tempPath = "d:upload	emp";//臨時(shí)目錄
    
    private String path = "d:upload";//上傳目錄
    
    public UploadServlet(){
        super();
    }
    
    public void destroy() {
        super.destroy();
    }
    
    public void doPost(HttpServletRequest request, HttpServletResponse response)
        throws ServletException, IOException {
        this.doGet(request, response);
    }
    
    /**
     * The doGet method of the servlet. 

     * 
     * This method is called when a form has its tag value method equals to get.
     * 
     * @param request
     *            the request send by the client to the server
     * @param response
     *            the response send by the server to the client
     * @throws ServletException
     *             if an error occurred
     * @throws IOException
     *             if an error occurred
     */
    public void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        response.setCharacterEncoding("GBK");
        request.setCharacterEncoding("GBK");
        DiskFileItemFactory fac = new DiskFileItemFactory();
        fac.setSizeThreshold(1024);
        fac.setRepository(new File(tempPath));
        ServletFileUpload upload = new ServletFileUpload(fac);
        upload.setFileSizeMax(1024*1024*5);
        try {
            List fileList = upload.parseRequest(request);
            Iterator iter = fileList.iterator();
            while(iter.hasNext()){
                FileItem fileItem = (FileItem)iter.next();
                if(!fileItem.isFormField()){
                    String name = fileItem.getName();
                    String fileSize = new Long(fileItem.getSize()).toString();
                    if(name == null || name.equals("") || fileSize.equals("0"))
                        continue;
                    name = name.substring(name.lastIndexOf("")+1);
                    File saveFile = new File(new File(path),name);
                    fileItem.write(saveFile);
                }
            }
        } catch (Exception e) {
            e.printStackTrace();
            throw new ServletException(e);
        }
    }
    
    public void init() throws ServletException {
        if(!new File(tempPath).exists()){
            new File(tempPath).mkdirs();
        }
        if(!new File(path).exists()){
            new File(path).mkdirs();
        }
    }
}

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java高拍儀前后臺(tái)處理案例

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