package com.shlanbao.tzsc.utils.tools;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.net.URLEncoder;
import javax.servlet.http.HttpServletResponse;
import org.apache.log4j.Logger;
/**
* 文件操作类
* @author Leejean
* @create 2014-6-24 下午05:06:23
*/
public class FileOptionsUtil {
private static Logger log=Logger.getLogger(FileOptionsUtil.class);
/**
* 获取文件的扩展名获得 ->.jpg
* @param fileName
* @return
*/
public static String getFileExt(String fileName) {
return fileName.substring(fileName.lastIndexOf("."));
}
public static String getFileName(String fileName) {
int pos = fileName.lastIndexOf('.');
if (pos == -1) {
return "";
} else {
return fileName.substring(0,pos);
}
}
/**
* @param url 写入路径
* @param content 写入内容
* @param encoder 写入编码
* @param append false：覆盖原有文件。ture：在原有文件后追加内容。
*/
public static boolean writeFile(String url, String content, String encoder, boolean append){
File file = new File(url);
String parent = file.getParent();
File dir = new File(parent);
if (!dir.exists()) dir.mkdirs(); //如果目录和文件不存在，创建目录和文件
FileOutputStream fos = null;
try {
fos = new FileOutputStream(url, append);
fos.write(content.getBytes(encoder));
fos.close();
return true;
} catch (Exception e) {
log.error("写入文件失败", e);
return false;
}
}
/**
* 保存
*
* @return
* @throws Exception
*/
public static boolean upload(File upload, String fileName,
String parentMenu) {
if (upload == null) {
return false;
}
// 3、保存上传的文件到upload目录下
FileInputStream fis = null;
FileOutputStream fos = null;
try {
File fileRootDir = new File(parentMenu);
if (!fileRootDir.exists())
fileRootDir.mkdirs();
// 2、目录
fis = new FileInputStream(upload);
fos = new FileOutputStream(new File(fileRootDir, fileName));
// 批量，每次传输2K
byte[] b = new byte[2 * 1024];
int len = fis.read(b);
while (len > 0) {
fos.write(b, 0, len);
len = fis.read(b);
}
} catch (Exception e) {
e.printStackTrace();
log.error("上传失败", e);
} finally {
try {
// 4、关闭流
if (fos != null) {
fos.flush();
fos.close();
}
if (fis != null) {
fis.close();
}
} catch (Exception e) {
e.printStackTrace();
log.error("关闭流失败", e);
}
}
return true;
}
/**
* 文件下载
*
* @param filePath
* 下载文件的完整路径
* @param response
* 响应对象
* @throws IOException
*/
@SuppressWarnings("unused")
public static boolean download(String filePath,
HttpServletResponse response) {
// 将服务器上的文件写入本地文件
OutputStream outputStream = null;
// 读取服务器上的文件信息
InputStream inputStream = null;
// 文件名,输出到用户的下载对话框
String fileName = null;
try {
if (filePath.lastIndexOf("/") != -1) {
// 从文件完整路径中提取文件名,转码是防止中文不能正确显示
fileName = new String(filePath.substring(
filePath.lastIndexOf("/") + 1).getBytes("utf-8"),
"ISO-8859-1");
} else if (filePath.lastIndexOf("\\") != -1) {
fileName = new String(filePath.substring(
filePath.lastIndexOf("\\") + 1).getBytes("utf-8"),
"ISO-8859-1");
}
inputStream = new FileInputStream(filePath);
response.setContentType("text/plain");
response.setHeader("Location", fileName);
response.setHeader("Content-Disposition",
"attachment;filename=" + fileName);
outputStream = response.getOutputStream();
byte[] buffer = new byte[1024];
int i = -1;
while ((i = inputStream.read(buffer)) != -1) {
outputStream.write(buffer, 0, i);
}
} catch (Exception e) {
log.error("下载失败", e);
return false;
} finally {
try {
if (outputStream != null) {
outputStream.flush();
outputStream.close();
}
if (inputStream != null) {
inputStream.close();
}
} catch (IOException e) {
e.printStackTrace();
log.error("关闭流失败", e);
}
}
return true;
}
/**
* 文件下载
* @param filePath 文件路径
* @param fileName 文件名称
* @param response 响应对象
* @return
*/
@SuppressWarnings("unused")
public static boolean download2(String filePath,String fileName,
HttpServletResponse response) {
// 将服务器上的文件写入本地文件
OutputStream outputStream = null;
// 读取服务器上的文件信息
InputStream inputStream = null;
// 文件名,输出到用户的下载对话框
//String fileName = null;
try {
inputStream = new FileInputStream(filePath);
response.setContentType("text/plain");
response.setHeader("Location", fileName);
response.setHeader("Content-Disposition",
"attachment;filename=" + URLEncoder.encode(fileName,"utf-8"));
outputStream = response.getOutputStream();
byte[] buffer = new byte[1024];
int i = -1;
while ((i = inputStream.read(buffer)) != -1) {
outputStream.write(buffer, 0, i);
}
} catch (Exception e) {
log.error("下载失败", e);
return false;
} finally {
try {
if (outputStream != null) {
outputStream.flush();
outputStream.close();
}
if (inputStream != null) {
inputStream.close();
}
} catch (IOException e) {
e.printStackTrace();
log.error("关闭流失败", e);
}
}
return true;
}
/**
* 读取普通文本文档中的内容
*
* @param sPath
* 文件路径
* @return 字符串 .txt .java .xml
*/
public static String readTXT(String sPath) {
StringBuffer sb = new StringBuffer();
try {
String encoding = "utf-8";
File file = new File(sPath);
if (file.isFile() && file.exists()) { // 判断文件是否存在
InputStreamReader read = new InputStreamReader(
new FileInputStream(file), encoding);// 考虑到编码格式
BufferedReader bufferedReader = new BufferedReader(read);
String lineTxt = null;
while ((lineTxt = bufferedReader.readLine()) != null) {
sb.append(lineTxt + "\n");
}
read.close();
} else {
System.out.println("找不到指定的文件");
}
} catch (Exception e) {
System.out.println("读取文件内容出错");
e.printStackTrace();
}
return sb != null ? sb.toString() : "";
}
public static boolean deleteFileurl(String filePath) {
try {
File file = new File(filePath);
if(file.exists()){
file.delete();
}
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
return false;
}
return true;
}
}