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