基于kindeditor3.4的上传功能的JAVA实现

最新推荐文章于 2021-03-16 20:06:27 发布

原创最新推荐文章于 2021-03-16 20:06:27 发布 · 262 阅读

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#Java #Apache #JSP #Servlet #PHP

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本文介绍如何为KindEditor实现自定义的Java上传组件，解决其仅支持PHP的问题，并适配Struts2框架。

最近公司要换图文混排，发现kindEditor非常不错，下载[url]http://www.kindsoft.net/[/url]下来用了用，发现上传功能只有php的，郁闷。。。
没办法自己写一个。。。
[quote]upload.jsp[/quote]


<%@ page pageEncoding="gbk"%>
<%@page
	import="java.util.*,java.io.*,
	org.apache.commons.fileupload.FileItem,
	org.apache.commons.fileupload.FileUploadException,
	org.apache.commons.fileupload.disk.DiskFileItemFactory,
	org.apache.commons.fileupload.servlet.ServletFileUpload,
	java.util.concurrent.locks.*"%>
<%
	String id = "";
	String url = "";
	String imgTitle = "";
	String imgWidth = "";
	String imgHeight = "";
	String imgBorder = "";
	String filePath = "";
	String align = "";
	// **************************************
	// 初始化上传工厂对象
	DiskFileItemFactory factory = new DiskFileItemFactory();
	// 设置上传工厂对象限制
	factory.setSizeThreshold(1024 * 1024 * 20);
	factory.setRepository(new File(request.getSession(true)
			.getServletContext().getRealPath("/")));
	// 创建上传对象
	ServletFileUpload upload = new ServletFileUpload(factory);
	upload.setFileSizeMax(1024 * 1024 * 20);
	List<FileItem> items = null;
	try {
		items = upload.parseRequest(request);
	} catch (FileUploadException e) {
		e.printStackTrace(System.out);
	}
	for (Iterator<FileItem> i = items.iterator(); i.hasNext();) {
		FileItem item = i.next();
		if (item.isFormField()) {
			String name = item.getFieldName();
			String value = item.getString("gbk");
			if (name.equals("id")) {
				id = value;
			} else if (name.equals("imgTitle")) {
				imgTitle = value;
			} else if (name.equals("imgWidth")) {
				imgWidth = value;
			} else if (name.equals("imgHeight")) {
				imgHeight = value;
			} else if (name.equals("imgBorder")) {
				imgBorder = value;
			} else if (name.equals("align")) {
				align = value;
			} else if (name.equals("url")) {
				filePath = value;
			}
		} else {
			// 取得表单域名
			String fieldName = item.getFieldName();
			// 取得文件名
			String fileName = item.getName();
			// 取得文件类型
			String contentType = item.getContentType();

			final Lock lock = new ReentrantLock();
			String newName = null;
			lock.lock();
			try {
				//加锁为防止同一时间文件名冲突 
				newName = System.currentTimeMillis()
						+ fileName.substring(fileName.lastIndexOf("."),
								fileName.length());
			} catch (Exception e) {
				e.printStackTrace(System.err);
			} finally {
				lock.unlock();
			}
			filePath = "./ke_upload/" + newName;
			FileOutputStream fos = new FileOutputStream(request
					.getSession().getServletContext().getRealPath("/")
					+ "ke_upload\\" + newName);
			if (item.isInMemory()) {
				fos.write(item.get());
				fos.close();
			} else {
				InputStream in = item.getInputStream();
				byte[] buffer = new byte[1024];
				int len;
				while ((len = in.read(buffer)) > 0) {
					fos.write(buffer, 0, len);
				}
				in.close();
				fos.close();
			}
		}
	}
	out.println("<html><head><title>Insert Image</title><meta http-equiv='content-type' content='text/html; charset=gbk'/></head><body>");
	out.println("<script type='text/javascript'>");
	out.println("parent.parent.KE.plugin['image'].insert('" + id
			+ "','" + filePath + "','" + imgTitle + "','" + imgWidth
			+ "','" + imgHeight + "','" + imgBorder + "','" + align
			+ "');</script>");
	out.println("</body></html>");
%>

代码完了，发在跟他的PHP文件一个目录就可以了
再把image.html文件的action一改，OK :arrow: ！
拿到Struts2应用中， :twisted: 问题又来了。。。
没办法一句一句的debug！
问题找到了，原来S2为简化上传功能，把所有的enctype="multipart/form-data"表单做了wrapper最后把HttpServletResquest封装成
org.apache.struts2.dispatcher.multipart.MultiPartRequestWrapper
怪不得我的
ServletFileUpload.parseRequest(request)不行！！！
还我原来的request :twisted:！！！
不过查看它的API 原来人家已经为咱做好了呵呵，比原来的方便许多。
继续代码：[quote]struts2Upload.jsp[/quote]

<%@ page language="java" pageEncoding="GBK"%>
<%@page
	import="java.util.*,java.io.*,
	org.apache.struts2.dispatcher.multipart.MultiPartRequestWrapper,
	java.util.concurrent.locks.*"%>
<%
	//Struts2  请求 包装过滤器
	MultiPartRequestWrapper wrapper = (MultiPartRequestWrapper) request;
	// 获得上传的文件名 
	String fileName = wrapper.getFileNames("imgFile")[0];
	//获得未见过滤器 
	File file = wrapper.getFiles("imgFile")[0];
	//----------- 重新构建上传文件名----------------------
	final Lock lock = new ReentrantLock();
	String newName = null;
	lock.lock();
	try {
		//加锁为防止文件名重复 
		newName = System.currentTimeMillis()
				+ fileName.substring(fileName.lastIndexOf("."),
						fileName.length());
	}finally {
		lock.unlock();
	}
	//------------ 锁结束 -------------
	//获取文件输出流 
	FileOutputStream fos = new FileOutputStream(request.getSession()
			.getServletContext().getRealPath("/")
			+ "ke_upload\\" + newName);
	//设置 KE 中的图片文件地址 
	String newFileName = request.getScheme() + "://"
			+ request.getServerName() + ":" + request.getServerPort()
			+ request.getContextPath() + "/ke_upload/" + newName;
	byte[] buffer = new byte[1024];
	//获取内存中当前文件输入流 
	InputStream in = new FileInputStream(file);
	try {
		int num = 0;
		while ((num = in.read(buffer)) > 0) {
			fos.write(buffer, 0, num);
		}
	} catch (Exception e) {
		e.printStackTrace(System.err);
	} finally {
		in.close();
		fos.close();
	}
	//发送给KE 
	out.println("<html><head><title>Insert Image</title><meta http-equiv='content-type' content='text/html; charset=gbk'/></head><body>");
	out.println("<script type='text/javascript'>");
	out.println("parent.parent.KE.plugin['image'].insert('"
			+ wrapper.getParameter("id") + "','" + newFileName + "','"
			+ wrapper.getParameter("imgTitle") + "','"
			+ wrapper.getParameter("imgWidth") + "','"
			+ wrapper.getParameter("imgHeight") + "','"
			+ wrapper.getParameter("imgBorder") + "','"
			+ wrapper.getParameter("align") + "');</script>");
	out.println("</body></html>");
%>