百度编辑器umeditor使用总结

百度编辑器是一个功能很全、很强大。

百度单张图片上传只能存储在项目下面，而不能独立自定义存储位置，因此重写上传代码

百度文章中的图片是通过base64实现的，直接存储在数据库中

tomcat通过虚拟路径实现将静态资源从项目中独立出来，避免更新项目解压war后文件丢失

umeditor 配置都是在umeditor.config.js

//图片上传配置区
        ,imageUrl:URL+"jsp/imageUp.jsp"             //图片上传提交地址
        ,imagePath:URL + "jsp/"                     //图片修正地址，引用了fixedImagePath,如有特殊需求，可自行配置
        ,imageFieldName:"upfile"                   //图片数据的key,若此处修改，需要在后台对应文件修改对应参数

定义文件位置

     window.UMEDITOR_CONFIG['imagePath'] = "/upload";

如何生成umeditor实例

	 var um = UM.getEditor('myEditor');

	 um.addListener('blur',function(){
		 var editorContent = UM.getEditor('myEditor').getContent();

		 if(editorContent != ""){
			 editorContent = filterHtml(editorContent);
			 $("#myEditorContent").val(escape(editorContent));
		 }
	 });

文章内容含有图片时，百度编辑器通过对图片进行base64编码，然后跟随文章内容一起保存在数据库中。

若是通过图片上传按钮插件，支持，php，asp,jsp接收，这样主要讲jsp，返回通过jsonp方式回调方法。image.js进行图片的上传和回调插入文章内容中

    request.setCharacterEncoding("utf-8");
	response.setCharacterEncoding("utf-8");
    Uploader up = new Uploader(request);
    up.setSavePath("upload");
    String[] fileType = {".gif" , ".png" , ".jpg" , ".jpeg" , ".bmp"};
    up.setAllowFiles(fileType);
    up.setMaxSize(10000); //单位KB
    up.upload();

    String callback = request.getParameter("callback");

    String result = "{\"name\":\""+ up.getFileName() +"\", \"originalName\": \""+ up.getOriginalName() +"\", \"size\": "+ up.getSize() +", \"state\": \""+ up.getState() +"\", \"type\": \""+ up.getType() +"\", \"url\": \""+ up.getUrl() +"\"}";

    result = result.replaceAll( "\\\\", "\\\\" );

    if( callback == null ){
        response.getWriter().print( result );
    }else{
        response.getWriter().print("<script>"+ callback +"(" + result + ")</script>");
    }

接收图片并保存到的代码是

package com.baidu.ueditor.um;

import java.io.*;
import java.text.SimpleDateFormat;
import java.util.*;

import org.apache.commons.fileupload.*;
import org.apache.commons.fileupload.FileUploadBase.InvalidContentTypeException;
import org.apache.commons.fileupload.FileUploadBase.SizeLimitExceededException;
import org.apache.commons.fileupload.util.*;
import org.apache.commons.fileupload.servlet.*;
import org.apache.commons.fileupload.FileItemIterator;
import org.apache.commons.fileupload.disk.DiskFileItemFactory;

import com.moral.util.Common;
import com.moral.util.Constants;

import sun.misc.BASE64Decoder;
import javax.servlet.http.HttpServletRequest;
/**
 * UEditor文件上传辅助类
 * 实现支持独立定义上传文件的路径
 *
 */
public class Uploader {
	// 输出文件地址
	private String url = "";

	// 上传文件名
	private String fileName = "";

	// 状态
	private String state = "";

	// 文件类型
	private String type = "";

	// 原始文件名
	private String originalName = "";

	// 文件大小
	private long size = 0;

	/*是否指定而外的绝对路径*/
	private String physicalPath = Constants.Html.EDITOR_UPLOAD_PATH;

	private HttpServletRequest request = null;

	private String title = "";

	//百度插件默认的图片在项目中保存路径
	private String savePath = "upload";

	/*自定义的独立的存储路径，目的是在重新发布后仍然保存有这些图片，避免文件丢失*/
	private String aliasPath = "";

	// 文件允许格式
	private String[] allowFiles = { ".rar", ".doc", ".docx", ".zip", ".pdf",".txt", ".swf", ".wmv", ".gif", ".png", ".jpg", ".jpeg", ".bmp" };
	// 文件大小限制，单位KB
	private int maxSize = 10000;

	private HashMap<String, String> errorInfo = new HashMap<String, String>();

	public Uploader(HttpServletRequest request) {
		this.request = request;
		HashMap<String, String> tmp = this.errorInfo;
		tmp.put("SUCCESS", "SUCCESS"); //默认成功
		tmp.put("NOFILE", "未包含文件上传域");
		tmp.put("TYPE", "不允许的文件格式");
		tmp.put("SIZE", "文件大小超出限制");
		tmp.put("ENTYPE", "请求类型ENTYPE错误");
		tmp.put("REQUEST", "上传请求异常");
		tmp.put("IO", "IO异常");
		tmp.put("DIR", "目录创建失败");
		tmp.put("UNKNOWN", "未知错误");

	}

	public void upload() throws Exception {
		boolean isMultipart = ServletFileUpload.isMultipartContent(this.request);
		if (!isMultipart) {
			this.state = this.errorInfo.get("NOFILE");
			return;
		}
		DiskFileItemFactory dff = new DiskFileItemFactory();
		String savePath = this.getFolder(this.savePath);
		dff.setRepository(new File(savePath));
		try {
			ServletFileUpload sfu = new ServletFileUpload(dff);
			sfu.setSizeMax(this.maxSize * 1024);
			sfu.setHeaderEncoding("utf-8");
			FileItemIterator fii = sfu.getItemIterator(this.request);
			while (fii.hasNext()) {
				FileItemStream fis = fii.next();
				if (!fis.isFormField()) {
					this.originalName = fis.getName().substring(fis.getName().lastIndexOf(System.getProperty("file.separator")) + 1);
					if (!this.checkFileType(this.originalName)) {
						this.state = this.errorInfo.get("TYPE");
						continue;
					}
					this.fileName = this.getName(this.originalName);
					this.type = this.getFileExt(this.fileName);
					this.url = savePath + "/" + this.fileName;

					BufferedInputStream in = new BufferedInputStream(fis.openStream());
					File file = new File(this.getPhysicalPath(this.url));
					FileOutputStream out = new FileOutputStream( file );
					BufferedOutputStream output = new BufferedOutputStream(out);
					Streams.copy(in, output, true);

					/*复制文件到指定目录下*/
					Common.copyFile(this.getPhysicalPath(this.url), this.aliasPath + "/" + this.fileName, true);

					this.state=this.errorInfo.get("SUCCESS");
					this.size = file.length();
					//UE中只会处理单张上传，完成后即退出
					break;
				} else {
					String fname = fis.getFieldName();
					//只处理title，其余表单请自行处理
					if(!fname.equals("pictitle")){
						continue;
					}
                    BufferedInputStream in = new BufferedInputStream(fis.openStream());
                    BufferedReader reader = new BufferedReader(new InputStreamReader(in));
                    StringBuffer result = new StringBuffer();
                    while (reader.ready()) {
                        result.append((char)reader.read());
                    }
                    this.title = new String(result.toString().getBytes(),"utf-8");
                    reader.close();  

				}
			}
		} catch (SizeLimitExceededException e) {
			this.state = this.errorInfo.get("SIZE");
		} catch (InvalidContentTypeException e) {
			this.state = this.errorInfo.get("ENTYPE");
		} catch (FileUploadException e) {
			this.state = this.errorInfo.get("REQUEST");
		} catch (Exception e) {
			this.state = this.errorInfo.get("UNKNOWN");
		}
	}

	/**
	 * 接受并保存以base64格式上传的文件
	 * @param fieldName
	 */
	public void uploadBase64(String fieldName){
		String savePath = this.getFolder(this.savePath);
		String base64Data = this.request.getParameter(fieldName);
		this.fileName = this.getName("test.png");
		this.url = savePath + "/" + this.fileName;
		BASE64Decoder decoder = new BASE64Decoder();
		try {
			File outFile = new File(this.getPhysicalPath(this.url));
			OutputStream ro = new FileOutputStream(outFile);
			byte[] b = decoder.decodeBuffer(base64Data);
			for (int i = 0; i < b.length; ++i) {
				if (b[i] < 0) {
					b[i] += 256;
				}
			}
			ro.write(b);
			ro.flush();
			ro.close();
			this.state=this.errorInfo.get("SUCCESS");
		} catch (Exception e) {
			this.state = this.errorInfo.get("IO");
		}
	}

	/**
	 * 文件类型判断
	 *
	 * @param fileName
	 * @return
	 */
	private boolean checkFileType(String fileName) {
		Iterator<String> type = Arrays.asList(this.allowFiles).iterator();
		while (type.hasNext()) {
			String ext = type.next();
			if (fileName.toLowerCase().endsWith(ext)) {
				return true;
			}
		}
		return false;
	}

	/**
	 * 获取文件扩展名
	 *
	 * @return string
	 */
	private String getFileExt(String fileName) {
		return fileName.substring(fileName.lastIndexOf("."));
	}

	/**
	 * 依据原始文件名生成新文件名
	 * @return
	 */
	private String getName(String fileName) {
		Random random = new Random();
		return this.fileName = "" + random.nextInt(10000)
				+ System.currentTimeMillis() + this.getFileExt(fileName);
	}

	/**
	 * 根据字符串创建本地目录 并按照日期建立子目录返回
	 * @param path
	 * @return
	 */
	private String getFolder(String path) {
		SimpleDateFormat formater = new SimpleDateFormat("yyyyMMdd");
		path += "/" + formater.format(new Date());

		System.out.println(this.getPhysicalPath(path));
		File dir = new File(this.getPhysicalPath(path));
		if (!dir.exists()) {
			try {
				dir.mkdirs();
			} catch (Exception e) {
				this.state = this.errorInfo.get("DIR");
				return "";
			}
		}

		this.aliasPath = this.physicalPath + "/" + path;

		System.out.println("aliasPath="+aliasPath);

		File aliasDir = new File(this.aliasPath);

		if(!aliasDir.exists()){
			try {
				aliasDir.mkdirs();
			} catch (Exception e) {
				e.printStackTrace();
			}
		}

		return path;
	}

	/**
	 * 根据传入的虚拟路径获取物理路径
	 *
	 * @param path
	 * @return
	 */
	private String getPhysicalPath(String path) {
		String realPath = "";

		String servletPath = this.request.getServletPath();
		realPath = this.request.getSession().getServletContext()
				.getRealPath(servletPath);
		return new File(realPath).getParent() +"/" +path;
	}

	public void setSavePath(String savePath) {
		this.savePath = savePath;
	}

	public void setAllowFiles(String[] allowFiles) {
		this.allowFiles = allowFiles;
	}

	public void setMaxSize(int size) {
		this.maxSize = size;
	}

	public long getSize() {
		return this.size;
	}

	public String getUrl() {
		return this.url;
	}

	public String getFileName() {
		return this.fileName;
	}

	public String getState() {
		return this.state;
	}

	public String getTitle() {
		return this.title;
	}

	public String getType() {
		return this.type;
	}

	public String getOriginalName() {
		return this.originalName;
	}

	public String getPhysicalPath() {
		return physicalPath;
	}

	public void setPhysicalPath(String physicalPath) {
		this.physicalPath = physicalPath;
	}
}