/**
* 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);
}
/** UEditor(百度编辑器)文件上传辅助类 */
public class Uploader {
// 文件大小常量, 单位kb
private static final int MAX_SIZE = 500 * 1024;
// 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 String size = "";
private HttpServletRequest request = null;
private String title = "";
// 保存路径
private String savePath = "upload";
// 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Byte
private long maxSize = 0;
private HashMap<String, String> errorInfo = new HashMap<String, String>();
private Map<String, String> params = null;
// 上传的文件数据
private InputStream inputStream = null;
public static final String ENCODEING = System.getProperties().getProperty("file.encoding");
public Uploader(HttpServletRequest request) {
this.request = request;
this.params = new HashMap<String, String>();
this.setMaxSize(Uploader.MAX_SIZE);
HashMap<String, String> tmp = this.errorInfo;
tmp.put("SUCCESS", "SUCCESS"); // 默认成功
// 未包含文件上传域
tmp.put("NOFILE", "\\u672a\\u5305\\u542b\\u6587\\u4ef6\\u4e0a\\u4f20\\u57df");
// 不允许的文件格式
tmp.put("TYPE", "\\u4e0d\\u5141\\u8bb8\\u7684\\u6587\\u4ef6\\u683c\\u5f0f");
// 文件大小超出限制
tmp.put("SIZE", "\\u6587\\u4ef6\\u5927\\u5c0f\\u8d85\\u51fa\\u9650\\u5236");
// 请求类型错误
tmp.put("ENTYPE", "\\u8bf7\\u6c42\\u7c7b\\u578b\\u9519\\u8bef");
// 上传请求异常
tmp.put("REQUEST", "\\u4e0a\\u4f20\\u8bf7\\u6c42\\u5f02\\u5e38");
// 未找到上传文件
tmp.put("FILE", "\\u672a\\u627e\\u5230\\u4e0a\\u4f20\\u6587\\u4ef6");
// IO异常
tmp.put("IO", "IO\\u5f02\\u5e38");
// 目录创建失败
tmp.put("DIR", "\\u76ee\\u5f55\\u521b\\u5efa\\u5931\\u8d25");
// 未知错误
tmp.put("UNKNOWN", "\\u672a\\u77e5\\u9519\\u8bef");
this.parseParams();
}
public void upload() throws Exception {
boolean isMultipart = ServletFileUpload.isMultipartContent(this.request);
if (!isMultipart) {
this.state = this.errorInfo.get("NOFILE");
return;
}
if (this.inputStream == null) {
this.state = this.errorInfo.get("FILE");
return;
}
// 存储title
this.title = this.getParameter("pictitle");
try {
String savePath = this.getFolder(this.savePath);
if (!this.checkFileType(this.originalName)) {
this.state = this.errorInfo.get("TYPE");
return;
}
this.fileName = this.getName(this.originalName);
this.type = this.getFileExt(this.fileName);
this.url = savePath + "/" + this.fileName;
FileOutputStream fos = new FileOutputStream(this.getPhysicalPath(this.url));
BufferedInputStream bis = new BufferedInputStream(this.inputStream);
byte[] buff = new byte[128];
int count = -1;
while ((count = bis.read(buff)) != -1) {
fos.write(buff, 0, count);
}
bis.close();
fos.close();
this.state = this.errorInfo.get("SUCCESS");
} catch (Exception e) {
e.printStackTrace();
this.state = this.errorInfo.get("IO");
}
}
/**
* 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;
try {
File outFile = new File(this.getPhysicalPath(this.url));
OutputStream ro = new FileOutputStream(outFile);
byte[] b = Base64.decodeBase64(base64Data);
ro.write(b);
ro.flush();
ro.close();
this.state = this.errorInfo.get("SUCCESS");
} catch (Exception e) {
this.state = this.errorInfo.get("IO");
}
}
public String getParameter(String name) {
return this.params.get(name);
}
/**
* 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("."));
}
private void parseParams() {
DiskFileItemFactory dff = new DiskFileItemFactory();
try {
ServletFileUpload sfu = new ServletFileUpload(dff);
sfu.setSizeMax(this.maxSize);
sfu.setHeaderEncoding(Uploader.ENCODEING);
FileItemIterator fii = sfu.getItemIterator(this.request);
while (fii.hasNext()) {
FileItemStream item = fii.next();
// 普通参数存储
if (item.isFormField()) {
this.params.put(item.getFieldName(), this.getParameterValue(item.openStream()));
} else {
// 只保留一个
if (this.inputStream == null) {
this.inputStream = item.openStream();
this.originalName = item.getName();
return;
}
}
}
} catch (Exception e) {
this.state = this.errorInfo.get("UNKNOWN");
}
}
/**
* 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());
File dir = new File(this.getPhysicalPath(path));
if (!dir.exists()) {
try {
dir.mkdirs();
} catch (Exception e) {
this.state = this.errorInfo.get("DIR");
return "";
}
}
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 servletPath = this.request.getServletPath();
String realPath = this.request.getSession().getServletContext().getRealPath(servletPath);
return new File(realPath).getParent() + "/" + path;
}
/**
* 从输入流中获取字符串数据
*
* @param in 给定的输入流， 结果字符串将从该流中读取
* @return 从流中读取到的字符串
*/
private String getParameterValue(InputStream in) {
BufferedReader reader = new BufferedReader(new InputStreamReader(in));
String result = "";
String tmpString = null;
try {
while ((tmpString = reader.readLine()) != null) {
result += tmpString;
}
} catch (Exception e) {
// do nothing
}
return result;
}
private byte[] getFileOutputStream(InputStream in) {
try {
return IOUtils.toByteArray(in);
} catch (IOException e) {
return null;
}
}
public void setSavePath(String savePath) {
this.savePath = savePath;
}
public void setAllowFiles(String[] allowFiles) {
this.allowFiles = allowFiles;
}
public void setMaxSize(long size) {
this.maxSize = size * 1024;
}
public String 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;
}
}