zoukankan      html  css  js  c++  java
  • xheditor上传图片的java实现

      最近一个项目中因为框架的原因,很多文本编辑器都不兼容,最后找到xheditor,这个富文本编辑器的确不错,功能基本都能满足,只是上传图片的java接口需要自己写,因此,测试了两种方法,最终成功。分享给大家。

         xheditor官方给出了上传接口。因此我们只需要调用自己的Action按照它指定的json格式返回一个json数据就可以了。

     

    一、使用servlet时的实现方式,servlet的实现方式需要引入commons-fileupload-1.3.1.jar包。主要是用来解析前台传过来的请求。

      1、前台页面的写法,当然要引入xheditor啦,这里我就不写了。这里主要是upImgUrl要写上你后台的Servlet。

    <textarea class="editor" name="articleContent" rows="35" cols="100" style="z-index:99;" 
            upImgUrl="UploadFileServlet" upImgExt="jpg,jpeg,gif,png" >
        ${article.articlecontent }
    </textarea>

         2、后台servlet的写法。配置文件中我也省略了,这里仅仅是一个Servlet。需要注意的,这里要引入commons-fileupload-1.3.1.jar包来解析请求。

    package com.zk.web.action;
    
    import java.io.File;
    import java.io.IOException;
    import java.util.Iterator;
    import java.util.List;
    
    import javax.servlet.ServletConfig;
    import javax.servlet.ServletContext;
    import javax.servlet.ServletException;
    import javax.servlet.ServletOutputStream;
    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.disk.DiskFileItemFactory;
    import org.apache.commons.fileupload.servlet.ServletFileUpload;
    
    
    public class UploadFileServlet extends HttpServlet {
        private static final long serialVersionUID = 1L;
        private ServletContext sc;
        
        public void init(ServletConfig config) {
            sc = config.getServletContext();
        }
        
        protected void doGet(HttpServletRequest request,
                HttpServletResponse response) throws ServletException, IOException {
            this.doPost(request, response);
        }
    
        protected void doPost(HttpServletRequest request,
                HttpServletResponse response) throws ServletException, IOException {
            ServletOutputStream out = response.getOutputStream();
            request.setCharacterEncoding( "utf-8" );
            response.setHeader("Content-Type" , "text/html");
            String returnPath = "";
            
            DiskFileItemFactory factory = new DiskFileItemFactory();
            ServletFileUpload upload = new ServletFileUpload(factory);
            try {
                List items = upload.parseRequest(request);
                Iterator iter = items.iterator();
                while (iter.hasNext()) {
                    FileItem item = (FileItem) iter.next();
                        System.out.println("上传文件的大小:" + item.getSize());
                        System.out.println("上传文件的类型:" + item.getContentType());
                        System.out.println("上传文件的名称:" + item.getName());
                        
                        returnPath = "images/"+item.getName();
                        //这里是取得项目地址
                        File forder = new File(sc.getRealPath("/")+"images/");
                //判断文件夹是否存在
    if (!forder.exists()) { forder.mkdir(); } File file = new File(sc.getRealPath("/")+"images/"+item.getName()); item.write(file); System.out.println("上传文件成功!"); } } catch (Exception e) { e.printStackTrace(); System.out.println("上传文件失败"); } //这里是关键,返回上传图片存储在服务器的地址。路径根据自己项目的路径调整。 out.print("{'err':'','msg':'"+ returnPath.replace("\", "/")+"'}"); } }

    二、使用spring mvc时的实现方式。uploadImage就是一个Action,

      1、前台页面的写法,同样要引入xheditor啦,我也省略了,这里主要是upImgUrl要写上你后台的Action。

    <textarea class="editor" name="articleContent" rows="35" cols="100" style="z-index:99;" 
            upImgUrl="uploadImage.do" upImgExt="jpg,jpeg,gif,png" >
        ${article.articlecontent }
    </textarea>

         2、后台Action的写法,这里是使用的是sping mvc框架。

    /**
         * 文本编辑器上传图片
         * @param request
         * @param response
         * @return
         * @throws Exception
         */
        public void uploadImage(HttpServletRequest request,
                HttpServletResponse response)throws Exception{
            ServletOutputStream out = response.getOutputStream();
            request.setCharacterEncoding( "utf-8" );
            response.setHeader("Content-Type" , "text/html");
            
            CommonsMultipartResolver commonsMultipartResolver = new CommonsMultipartResolver(
                    request.getSession().getServletContext());
            // 设置编码
            commonsMultipartResolver.setDefaultEncoding("utf-8");
            if (commonsMultipartResolver.isMultipart(request)) {
                MultipartHttpServletRequest multipartRequest = (MultipartHttpServletRequest) request;
                MultipartFile image = multipartRequest.getFile("filedata");
                String url = "images"+File.separator+Tool.dateToString(new Date(), "yyyyMMdd")+File.separator;
           //这里可以从项目中取得你项目根目录的地址 String filePath
    = "D:/"+url; Random r = new Random(); if(image != null && !image.isEmpty()){ InputStream xtins = image.getInputStream(); String hj = new String(image.getOriginalFilename().getBytes("ISO-8859-1"),"UTF-8"); hj = hj.split("\.")[1];
              //这里用来生成文件名 String fileName
    = Tool.dateToString(new Date(), "yyyyMMddHHmmss")+r.nextInt(1000)+"."+hj; saveInputStreamToFile(filePath, fileName, xtins);
              //这里是用来返回给xheditor的 out.print(
    "{'err':'','msg':'"+ (url+fileName).replace("\", "/")+"'}"); } } } /** * 保存文件流到指定路径 * @param filePath * @param fileName * @param inputStream * @throws Exception */ public void saveInputStreamToFile(String filePath, String fileName, InputStream inputStream) throws Exception { OutputStream os = null; try { File forder = new File(filePath); if (!forder.exists()) { forder.mkdir(); } File file = new File(filePath + fileName); os = new FileOutputStream(file); int bytesRead = 0; byte[] buffer = new byte[8192]; while ((bytesRead = inputStream.read(buffer, 0, 8192)) != -1) { os.write(buffer, 0, bytesRead); } os.close(); inputStream.close(); } catch (Exception ex) { ex.printStackTrace(); throw ex; } finally { if (inputStream != null) { inputStream.close(); } if (os != null) { os.close(); } } }
  • 相关阅读:
    spring
    ajax
    jquary
    Java web 部分
    长跑马拉松
    面试的标准
    数据预处理——剔除异常值,平滑,归一化
    概率分布
    养生
    平滑的作用
  • 原文地址:https://www.cnblogs.com/fengqingyuweihan/p/3850875.html
Copyright © 2011-2022 走看看