最近几个项目都要用到在线编辑器，由于之前做在线编辑器都只在php上，对于用java尤其是springmvc框架时，似乎并不如PHP那么简单，搜集了很多博文和资料，全部都不能达到效果，最后在参考各种资料后，自己花时间写了一个上传图片的控制器，亲测保证能用。
1.图片上传控制器
package com.xishan.yueke.view.system;
import java.io.File;
import java.io.IOException;
import java.io.PrintWriter;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collections;
import java.util.Comparator;
import java.util.Date;
import java.util.HashMap;
import java.util.Hashtable;
import java.util.List;
import java.util.Map;
import java.util.Random;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.commons.fileupload.servlet.ServletFileUpload;
import org.apache.commons.io.FileUtils;
import org.json.simple.JSONObject;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.multipart.MultipartFile;
import com.xishan.yueke.view.BaseAction;
/**
* Class Name: FileManageAction.java
* Function:
* 在线编辑器控制器
* @author Yang Ji.
* @DateTime 2015年8月10日 下午8:26:50
* @version 1.0
*/
@Controller
public class FileManageAction extends BaseAction
{
// windows
// private String PATH_LINE = "\\";
// linux
private String PATH_LINE = "/";
/**
* 文件上传
* @param request {@link HttpServletRequest}
* @param response {@link HttpServletResponse}
* @return json response
*/
@SuppressWarnings("unchecked")
@RequestMapping(value = "/fileUpload", method = RequestMethod.POST)
@ResponseBody
public void fileUpload(HttpServletRequest request,
HttpServletResponse response,
@RequestParam("imgFile") MultipartFile[] imgFile) {
try {
response.setCharacterEncoding("utf-8");
PrintWriter out = response.getWriter();
//文件保存本地目录路径
String savePath = request.getSession().getServletContext().getRealPath(PATH_LINE) + "kindeditor"+PATH_LINE+"attached"+PATH_LINE;
//文件保存目录URL
String saveUrl = request.getContextPath() + PATH_LINE +"kindeditor"+PATH_LINE+"attached"+PATH_LINE;
if(!ServletFileUpload.isMultipartContent(request)){
out.print(getError("请选择文件。"));
out.close();
return;
}
//检查目录
File uploadDir = new File(savePath);
if(!uploadDir.isDirectory()){
out.print(getError("上传目录不存在。"));
out.close();
return;
}
//检查目录写权限
if(!uploadDir.canWrite()){
out.print(getError("上传目录没有写权限。"));
out.close();
return;
}
String dirName = request.getParameter("dir");
if (dirName == null) {
dirName = "image";
}
//定义允许上传的文件扩展名
Map extMap = new HashMap();
extMap.put("image", "gif,jpg,jpeg,png,bmp");
extMap.put("flash", "swf,flv");
extMap.put("media", "swf,flv,mp3,wav,wma,wmv,mid,avi,mpg,asf,rm,rmvb");
extMap.put("file", "doc,docx,xls,xlsx,ppt,htm,html,xml,txt,zip,rar,gz,bz2");
if(!extMap.containsKey(dirName)){
out.print(getError("目录名不正确。"));
out.close();
return;
}
//创建文件夹
savePath += dirName + PATH_LINE;
saveUrl += dirName + PATH_LINE;
File saveDirFile = new File(savePath);
if (!saveDirFile.exists()) {
saveDirFile.mkdirs();
}
SimpleDateFormat sdf = new SimpleDateFormat("yyyyMMdd");
String ymd = sdf.format(new Date());
savePath += ymd + PATH_LINE;
saveUrl += ymd + PATH_LINE;
File dirFile = new File(savePath);
if (!dirFile.exists()) {
dirFile.mkdirs();
}
//最大文件大小
long maxSize = 1000000;
// 保存文件
for(MultipartFile iFile : imgFile){
String fileName = iFile.getOriginalFilename();
//检查文件大小
if(iFile.getSize() > maxSize){
out.print(getError("上传文件大小超过限制。"));
out.close();
return;
}
//检查扩展名
String fileExt = fileName.substring(fileName.lastIndexOf(".") + 1).toLowerCase();
if(!Arrays.asList(extMap.get(dirName).split(",")).contains(fileExt)){
//return getError("上传文件扩展名是不允许的扩展名。\n只允许" + extMap.get(dirName) + "格式。");
out.print(getError("上传文件扩展名是不允许的扩展名。\n只允许" + extMap.get(dirName) + "格式。"));
out.close();
return;
}
SimpleDateFormat df = new SimpleDateFormat("yyyyMMddHHmmss");
String newFileName = df.format(new Date()) + "_" + new Random().nextInt(1000) + "." + fileExt;
try{
File uploadedFile = new File(savePath, newFileName);
// 写入文件
FileUtils.copyInputStreamToFile(iFile.getInputStream(), uploadedFile);
}catch(Exception e){
out.print(getError("上传文件失败。"));
out.close();
return;
}
JSONObject obj = new JSONObject();
obj.put("error", 0);
obj.put("url", saveUrl + newFileName);
out.print(obj.toJSONString());
out.close();
}
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
private Map getError(String errorMsg) {
Map errorMap = new HashMap();
errorMap.put("error", 1);
errorMap.put("message", errorMsg);
return errorMap;
}
/**
* 文件空间
* @param request {@link HttpServletRequest}
* @param response {@link HttpServletResponse}
* @return json
*/
@SuppressWarnings("unchecked")
@RequestMapping(value = "/fileManager")
@ResponseBody
public void fileManager(HttpServletRequest request, HttpServletResponse response) {
try {
//根目录路径，可以指定绝对路径
String rootPath = request.getSession().getServletContext().getRealPath(PATH_LINE) + "kindeditor"+PATH_LINE+"attached"+PATH_LINE;
//根目录URL，可以指定绝对路径，比如 http://www.yoursite.com/attached/
String rootUrl = request.getContextPath() + PATH_LINE+"kindeditor"+PATH_LINE+"attached"+PATH_LINE;
response.setContentType("application/json; charset=UTF-8");
PrintWriter out = response.getWriter();
//图片扩展名
String[] fileTypes = new String[]{"gif", "jpg", "jpeg", "png", "bmp"};
String dirName = request.getParameter("dir");
if (dirName != null) {
if(!Arrays.asList(new String[]{"image", "flash", "media", "file"}).contains(dirName)){
out.print("无效的文件夹。");
out.close();
return;
}
rootPath += dirName + PATH_LINE;
rootUrl += dirName + PATH_LINE;
File saveDirFile = new File(rootPath);
if (!saveDirFile.exists()) {
saveDirFile.mkdirs();
}
}
//根据path参数，设置各路径和URL
String path = request.getParameter("path") != null ? request.getParameter("path") : "";
String currentPath = rootPath + path;
String currentUrl = rootUrl + path;
String currentDirPath = path;
String moveupDirPath = "";
if (!"".equals(path)) {
String str = currentDirPath.substring(0, currentDirPath.length() - 1);
moveupDirPath = str.lastIndexOf(PATH_LINE) >= 0 ? str.substring(0, str.lastIndexOf(PATH_LINE) + 1) : "";
}
//排序形式，name or size or type
String order = request.getParameter("order") != null ? request.getParameter("order").toLowerCase() : "name";
//不允许使用..移动到上一级目录
if (path.indexOf("..") >= 0) {
out.print("访问权限拒绝。");
out.close();
return;
}
//最后一个字符不是/
if (!"".equals(path) && !path.endsWith(PATH_LINE)) {
out.print("无效的访问参数验证。");
out.close();
return;
}
//目录不存在或不是目录
File currentPathFile = new File(currentPath);
if(!currentPathFile.isDirectory()){
out.print("文件夹不存在。");
out.close();
return;
}
//遍历目录取的文件信息
List> fileList = new ArrayList>();
if(currentPathFile.listFiles() != null) {
for (File file : currentPathFile.listFiles()) {
Hashtable hash = new Hashtable();
String fileName = file.getName();
if(file.isDirectory()) {
hash.put("is_dir", true);
hash.put("has_file", (file.listFiles() != null));
hash.put("filesize", 0L);
hash.put("is_photo", false);
hash.put("filetype", "");
} else if(file.isFile()){
String fileExt = fileName.substring(fileName.lastIndexOf(".") + 1).toLowerCase();
hash.put("is_dir", false);
hash.put("has_file", false);
hash.put("filesize", file.length());
hash.put("is_photo", Arrays.asList(fileTypes).contains(fileExt));
hash.put("filetype", fileExt);
}
hash.put("filename", fileName);
hash.put("datetime", new SimpleDateFormat("yyyy-MM-dd HH:mm:ss").format(file.lastModified()));
fileList.add(hash);
}
}
if ("size".equals(order)) {
Collections.sort(fileList, new SizeComparator());
} else if ("type".equals(order)) {
Collections.sort(fileList, new TypeComparator());
} else {
Collections.sort(fileList, new NameComparator());
}
JSONObject result = new JSONObject();
result.put("moveup_dir_path", moveupDirPath);
result.put("current_dir_path", currentDirPath);
result.put("current_url", currentUrl);
result.put("total_count", fileList.size());
result.put("file_list", fileList);
out.println(result.toJSONString());
out.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
private class NameComparator implements Comparator> {
public int compare(Map hashA, Map hashB) {
if (((Boolean)hashA.get("is_dir")) && !((Boolean)hashB.get("is_dir"))) {
return -1;
} else if (!((Boolean)hashA.get("is_dir")) && ((Boolean)hashB.get("is_dir"))) {
return 1;
} else {
return ((String)hashA.get("filename")).compareTo((String)hashB.get("filename"));
}
}
}
private class SizeComparator implements Comparator> {
public int compare(Map hashA, Map hashB) {
if (((Boolean)hashA.get("is_dir")) && !((Boolean)hashB.get("is_dir"))) {
return -1;
} else if (!((Boolean)hashA.get("is_dir")) && ((Boolean)hashB.get("is_dir"))) {
return 1;
} else {
if (((Long)hashA.get("filesize")) > ((Long)hashB.get("filesize"))) {
return 1;
} else if (((Long)hashA.get("filesize")) < ((Long)hashB.get("filesize"))) {
return -1;
} else {
return 0;
}
}
}
}
private class TypeComparator implements Comparator> {
public int compare(Map hashA, Map hashB) {
if (((Boolean)hashA.get("is_dir")) && !((Boolean)hashB.get("is_dir"))) {
return -1;
} else if (!((Boolean)hashA.get("is_dir")) && ((Boolean)hashB.get("is_dir"))) {
return 1;
} else {
return ((String)hashA.get("filetype")).compareTo((String)hashB.get("filetype"));
}
}
}
}
2.jsp页面使用方法（在head加入下面代码，替换名为description的编辑区，在此之前需导入kindeditor的相关文件，详见官方文档）
使用其他的框架（比如Spring+Struts+Hibernate）方法大致相同，最终效果如下：
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持脚本之家。