799 lines
22 KiB
Java
799 lines
22 KiB
Java
/**
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* Copyright © 2012-2014 <a href="https://github.com/thinkgem/jeesite">JeeSite</a> All rights reserved.
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*/
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package com.nis.util;
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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.OutputStream;
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import java.net.URLEncoder;
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import java.security.MessageDigest;
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import java.security.cert.CertificateFactory;
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import java.security.cert.X509Certificate;
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import java.util.Enumeration;
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import javax.servlet.ServletOutputStream;
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import javax.servlet.http.HttpServletRequest;
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import javax.servlet.http.HttpServletResponse;
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import org.apache.tools.zip.ZipEntry;
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import org.apache.tools.zip.ZipFile;
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import org.apache.tools.zip.ZipOutputStream;
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import org.slf4j.Logger;
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import org.slf4j.LoggerFactory;
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import com.nis.web.security.Servlets;
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/**
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* 文件操作工具类 实现文件的创建、删除、复制、压缩、解压以及目录的创建、删除、复制、压缩解压等功能
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*
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* @author ThinkGem
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* @version 2013-06-21
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*/
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public class FileUtils extends org.apache.commons.io.FileUtils {
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private static Logger log = LoggerFactory.getLogger(FileUtils.class);
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/**
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* 复制单个文件，如果目标文件存在，则不覆盖
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*
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* @param srcFileName
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* 待复制的文件名
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* @param descFileName
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* 目标文件名
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* @return 如果复制成功，则返回true，否则返回false
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*/
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public static boolean copyFile(String srcFileName, String descFileName) {
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return FileUtils.copyFileCover(srcFileName, descFileName, false);
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}
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/**
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* 复制单个文件
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*
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* @param srcFileName
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* 待复制的文件名
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* @param descFileName
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* 目标文件名
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* @param coverlay
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* 如果目标文件已存在，是否覆盖
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* @return 如果复制成功，则返回true，否则返回false
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*/
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public static boolean copyFileCover(String srcFileName, String descFileName, boolean coverlay) {
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File srcFile = new File(srcFileName);
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// 判断源文件是否存在
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if (!srcFile.exists()) {
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log.debug("复制文件失败，源文件 " + srcFileName + " 不存在!");
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return false;
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}
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// 判断源文件是否是合法的文件
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else if (!srcFile.isFile()) {
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log.debug("复制文件失败，" + srcFileName + " 不是一个文件!");
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return false;
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}
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File descFile = new File(descFileName);
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// 判断目标文件是否存在
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if (descFile.exists()) {
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// 如果目标文件存在，并且允许覆盖
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if (coverlay) {
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log.debug("目标文件已存在，准备删除!");
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if (!FileUtils.delFile(descFileName)) {
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log.debug("删除目标文件 " + descFileName + " 失败!");
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return false;
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}
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} else {
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log.debug("复制文件失败，目标文件 " + descFileName + " 已存在!");
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return false;
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}
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} else {
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if (!descFile.getParentFile().exists()) {
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// 如果目标文件所在的目录不存在，则创建目录
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log.debug("目标文件所在的目录不存在，创建目录!");
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// 创建目标文件所在的目录
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if (!descFile.getParentFile().mkdirs()) {
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log.debug("创建目标文件所在的目录失败!");
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return false;
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}
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}
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}
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// 准备复制文件
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// 读取的位数
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int readByte = 0;
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InputStream ins = null;
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OutputStream outs = null;
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try {
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// 打开源文件
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ins = new FileInputStream(srcFile);
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// 打开目标文件的输出流
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outs = new FileOutputStream(descFile);
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byte[] buf = new byte[1024];
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// 一次读取1024个字节，当readByte为-1时表示文件已经读取完毕
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while ((readByte = ins.read(buf)) != -1) {
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// 将读取的字节流写入到输出流
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outs.write(buf, 0, readByte);
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}
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log.debug("复制单个文件 " + srcFileName + " 到" + descFileName + "成功!");
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return true;
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} catch (Exception e) {
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log.debug("复制文件失败：" + e.getMessage());
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return false;
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} finally {
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// 关闭输入输出流，首先关闭输出流，然后再关闭输入流
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if (outs != null) {
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try {
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outs.close();
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} catch (IOException oute) {
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oute.printStackTrace();
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}
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}
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if (ins != null) {
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try {
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ins.close();
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} catch (IOException ine) {
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ine.printStackTrace();
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}
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}
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}
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}
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/**
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* 复制整个目录的内容，如果目标目录存在，则不覆盖
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*
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* @param srcDirName
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* 源目录名
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* @param descDirName
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* 目标目录名
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* @return 如果复制成功返回true，否则返回false
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*/
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public static boolean copyDirectory(String srcDirName, String descDirName) {
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return FileUtils.copyDirectoryCover(srcDirName, descDirName, false);
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}
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/**
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* 复制整个目录的内容
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*
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* @param srcDirName
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* 源目录名
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* @param descDirName
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* 目标目录名
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* @param coverlay
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* 如果目标目录存在，是否覆盖
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* @return 如果复制成功返回true，否则返回false
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*/
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public static boolean copyDirectoryCover(String srcDirName, String descDirName, boolean coverlay) {
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File srcDir = new File(srcDirName);
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// 判断源目录是否存在
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if (!srcDir.exists()) {
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log.debug("复制目录失败，源目录 " + srcDirName + " 不存在!");
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return false;
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}
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// 判断源目录是否是目录
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else if (!srcDir.isDirectory()) {
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log.debug("复制目录失败，" + srcDirName + " 不是一个目录!");
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return false;
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}
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// 如果目标文件夹名不以文件分隔符结尾，自动添加文件分隔符
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String descDirNames = descDirName;
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if (!descDirNames.endsWith(File.separator)) {
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descDirNames = descDirNames + File.separator;
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}
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File descDir = new File(descDirNames);
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// 如果目标文件夹存在
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if (descDir.exists()) {
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if (coverlay) {
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// 允许覆盖目标目录
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log.debug("目标目录已存在，准备删除!");
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if (!FileUtils.delFile(descDirNames)) {
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log.debug("删除目录 " + descDirNames + " 失败!");
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return false;
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}
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} else {
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log.debug("目标目录复制失败，目标目录 " + descDirNames + " 已存在!");
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return false;
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}
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} else {
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// 创建目标目录
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log.debug("目标目录不存在，准备创建!");
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if (!descDir.mkdirs()) {
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log.debug("创建目标目录失败!");
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return false;
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}
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}
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boolean flag = true;
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// 列出源目录下的所有文件名和子目录名
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File[] files = srcDir.listFiles();
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for (int i = 0; i < files.length; i++) {
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// 如果是一个单个文件，则直接复制
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if (files[i].isFile()) {
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flag = FileUtils.copyFile(files[i].getAbsolutePath(), descDirName + files[i].getName());
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// 如果拷贝文件失败，则退出循环
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if (!flag) {
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break;
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}
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}
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// 如果是子目录，则继续复制目录
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if (files[i].isDirectory()) {
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flag = FileUtils.copyDirectory(files[i].getAbsolutePath(), descDirName + files[i].getName());
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// 如果拷贝目录失败，则退出循环
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if (!flag) {
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break;
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}
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}
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}
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if (!flag) {
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log.debug("复制目录 " + srcDirName + " 到 " + descDirName + " 失败!");
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return false;
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}
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log.debug("复制目录 " + srcDirName + " 到 " + descDirName + " 成功!");
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return true;
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}
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/**
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*
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* 删除文件，可以删除单个文件或文件夹
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*
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* @param fileName
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* 被删除的文件名
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* @return 如果删除成功，则返回true，否是返回false
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*/
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public static boolean delFile(String fileName) {
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File file = new File(fileName);
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if (!file.exists()) {
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log.debug(fileName + " 文件不存在!");
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return true;
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} else {
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if (file.isFile()) {
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return FileUtils.deleteFile(fileName);
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} else {
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return FileUtils.deleteDirectory(fileName);
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}
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||
}
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||
}
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||
|
||
/**
|
||
*
|
||
* 删除单个文件
|
||
*
|
||
* @param fileName
|
||
* 被删除的文件名
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||
* @return 如果删除成功，则返回true，否则返回false
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*/
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public static boolean deleteFile(String fileName) {
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File file = new File(fileName);
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if (file.exists() && file.isFile()) {
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if (file.delete()) {
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log.debug("删除文件 " + fileName + " 成功!");
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return true;
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} else {
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log.debug("删除文件 " + fileName + " 失败!");
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return false;
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}
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} else {
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log.debug(fileName + " 文件不存在!");
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return true;
|
||
}
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||
}
|
||
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/**
|
||
*
|
||
* 删除目录及目录下的文件
|
||
*
|
||
* @param dirName
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* 被删除的目录所在的文件路径
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* @return 如果目录删除成功，则返回true，否则返回false
|
||
*/
|
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public static boolean deleteDirectory(String dirName) {
|
||
String dirNames = dirName;
|
||
if (!dirNames.endsWith(File.separator)) {
|
||
dirNames = dirNames + File.separator;
|
||
}
|
||
File dirFile = new File(dirNames);
|
||
if (!dirFile.exists() || !dirFile.isDirectory()) {
|
||
log.debug(dirNames + " 目录不存在!");
|
||
return true;
|
||
}
|
||
boolean flag = true;
|
||
// 列出全部文件及子目录
|
||
File[] files = dirFile.listFiles();
|
||
for (int i = 0; i < files.length; i++) {
|
||
// 删除子文件
|
||
if (files[i].isFile()) {
|
||
flag = FileUtils.deleteFile(files[i].getAbsolutePath());
|
||
// 如果删除文件失败，则退出循环
|
||
if (!flag) {
|
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break;
|
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}
|
||
}
|
||
// 删除子目录
|
||
else if (files[i].isDirectory()) {
|
||
flag = FileUtils.deleteDirectory(files[i].getAbsolutePath());
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||
// 如果删除子目录失败，则退出循环
|
||
if (!flag) {
|
||
break;
|
||
}
|
||
}
|
||
}
|
||
|
||
if (!flag) {
|
||
log.debug("删除目录失败!");
|
||
return false;
|
||
}
|
||
// 删除当前目录
|
||
if (dirFile.delete()) {
|
||
log.debug("删除目录 " + dirName + " 成功!");
|
||
return true;
|
||
} else {
|
||
log.debug("删除目录 " + dirName + " 失败!");
|
||
return false;
|
||
}
|
||
|
||
}
|
||
|
||
/**
|
||
* 创建单个文件
|
||
*
|
||
* @param descFileName
|
||
* 文件名，包含路径
|
||
* @return 如果创建成功，则返回true，否则返回false
|
||
*/
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||
public static boolean createFile(String descFileName) {
|
||
File file = new File(descFileName);
|
||
if (file.exists()) {
|
||
log.debug("文件 " + descFileName + " 已存在!");
|
||
return false;
|
||
}
|
||
if (descFileName.endsWith(File.separator)) {
|
||
log.debug(descFileName + " 为目录，不能创建目录!");
|
||
return false;
|
||
}
|
||
if (!file.getParentFile().exists()) {
|
||
// 如果文件所在的目录不存在，则创建目录
|
||
if (!file.getParentFile().mkdirs()) {
|
||
log.debug("创建文件所在的目录失败!");
|
||
return false;
|
||
}
|
||
}
|
||
|
||
// 创建文件
|
||
try {
|
||
if (file.createNewFile()) {
|
||
log.debug(descFileName + " 文件创建成功!");
|
||
return true;
|
||
} else {
|
||
log.debug(descFileName + " 文件创建失败!");
|
||
return false;
|
||
}
|
||
} catch (Exception e) {
|
||
e.printStackTrace();
|
||
log.debug(descFileName + " 文件创建失败!");
|
||
return false;
|
||
}
|
||
|
||
}
|
||
|
||
/**
|
||
* 创建目录
|
||
*
|
||
* @param descDirName
|
||
* 目录名,包含路径
|
||
* @return 如果创建成功，则返回true，否则返回false
|
||
*/
|
||
public static boolean createDirectory(String descDirName) {
|
||
String descDirNames = descDirName;
|
||
if (!descDirNames.endsWith(File.separator)) {
|
||
descDirNames = descDirNames + File.separator;
|
||
}
|
||
File descDir = new File(descDirNames);
|
||
if (descDir.exists()) {
|
||
log.debug("目录 " + descDirNames + " 已存在!");
|
||
return false;
|
||
}
|
||
// 创建目录
|
||
if (descDir.mkdirs()) {
|
||
log.debug("目录 " + descDirNames + " 创建成功!");
|
||
return true;
|
||
} else {
|
||
log.debug("目录 " + descDirNames + " 创建失败!");
|
||
return false;
|
||
}
|
||
|
||
}
|
||
|
||
/**
|
||
* 写入文件
|
||
*
|
||
* @param file
|
||
* 要写入的文件
|
||
*/
|
||
public static void writeToFile(String fileName, String content, boolean append) {
|
||
try {
|
||
FileUtils.write(new File(fileName), content, "utf-8", append);
|
||
log.debug("文件 " + fileName + " 写入成功!");
|
||
} catch (IOException e) {
|
||
log.debug("文件 " + fileName + " 写入失败! " + e.getMessage());
|
||
}
|
||
}
|
||
|
||
/**
|
||
* 写入文件
|
||
*
|
||
* @param file
|
||
* 要写入的文件
|
||
*/
|
||
public static void writeToFile(String fileName, String content, String encoding, boolean append) {
|
||
try {
|
||
FileUtils.write(new File(fileName), content, encoding, append);
|
||
log.debug("文件 " + fileName + " 写入成功!");
|
||
} catch (IOException e) {
|
||
log.debug("文件 " + fileName + " 写入失败! " + e.getMessage());
|
||
}
|
||
}
|
||
|
||
/**
|
||
* 压缩文件或目录
|
||
*
|
||
* @param srcDirName
|
||
* 压缩的根目录
|
||
* @param fileName
|
||
* 根目录下的待压缩的文件名或文件夹名，其中*或""表示跟目录下的全部文件
|
||
* @param descFileName
|
||
* 目标zip文件
|
||
*/
|
||
public static void zipFiles(String srcDirName, String fileName, String descFileName) {
|
||
// 判断目录是否存在
|
||
if (srcDirName == null) {
|
||
log.debug("文件压缩失败，目录 " + srcDirName + " 不存在!");
|
||
return;
|
||
}
|
||
File fileDir = new File(srcDirName);
|
||
if (!fileDir.exists() || !fileDir.isDirectory()) {
|
||
log.debug("文件压缩失败，目录 " + srcDirName + " 不存在!");
|
||
return;
|
||
}
|
||
String dirPath = fileDir.getAbsolutePath();
|
||
File descFile = new File(descFileName);
|
||
try {
|
||
ZipOutputStream zouts = new ZipOutputStream(new FileOutputStream(descFile));
|
||
if ("*".equals(fileName) || "".equals(fileName)) {
|
||
FileUtils.zipDirectoryToZipFile(dirPath, fileDir, zouts);
|
||
} else {
|
||
File file = new File(fileDir, fileName);
|
||
if (file.isFile()) {
|
||
FileUtils.zipFilesToZipFile(dirPath, file, zouts);
|
||
} else {
|
||
FileUtils.zipDirectoryToZipFile(dirPath, file, zouts);
|
||
}
|
||
}
|
||
zouts.close();
|
||
log.debug(descFileName + " 文件压缩成功!");
|
||
} catch (Exception e) {
|
||
log.debug("文件压缩失败：" + e.getMessage());
|
||
e.printStackTrace();
|
||
}
|
||
|
||
}
|
||
|
||
/**
|
||
* 解压缩ZIP文件，将ZIP文件里的内容解压到descFileName目录下
|
||
*
|
||
* @param zipFileName
|
||
* 需要解压的ZIP文件
|
||
* @param descFileName
|
||
* 目标文件
|
||
*/
|
||
public static boolean unZipFiles(String zipFileName, String descFileName) {
|
||
String descFileNames = descFileName;
|
||
if (!descFileNames.endsWith(File.separator)) {
|
||
descFileNames = descFileNames + File.separator;
|
||
}
|
||
try {
|
||
// 根据ZIP文件创建ZipFile对象
|
||
ZipFile zipFile = new ZipFile(zipFileName);
|
||
ZipEntry entry = null;
|
||
String entryName = null;
|
||
String descFileDir = null;
|
||
byte[] buf = new byte[4096];
|
||
int readByte = 0;
|
||
// 获取ZIP文件里所有的entry
|
||
@SuppressWarnings("rawtypes")
|
||
Enumeration enums = zipFile.getEntries();
|
||
// 遍历所有entry
|
||
while (enums.hasMoreElements()) {
|
||
entry = (ZipEntry) enums.nextElement();
|
||
// 获得entry的名字
|
||
entryName = entry.getName();
|
||
descFileDir = descFileNames + entryName;
|
||
if (entry.isDirectory()) {
|
||
// 如果entry是一个目录，则创建目录
|
||
new File(descFileDir).mkdirs();
|
||
continue;
|
||
} else {
|
||
// 如果entry是一个文件，则创建父目录
|
||
new File(descFileDir).getParentFile().mkdirs();
|
||
}
|
||
File file = new File(descFileDir);
|
||
// 打开文件输出流
|
||
OutputStream os = new FileOutputStream(file);
|
||
// 从ZipFile对象中打开entry的输入流
|
||
InputStream is = zipFile.getInputStream(entry);
|
||
while ((readByte = is.read(buf)) != -1) {
|
||
os.write(buf, 0, readByte);
|
||
}
|
||
os.close();
|
||
is.close();
|
||
}
|
||
zipFile.close();
|
||
log.debug("文件解压成功!");
|
||
return true;
|
||
} catch (Exception e) {
|
||
log.debug("文件解压失败：" + e.getMessage());
|
||
return false;
|
||
}
|
||
}
|
||
|
||
/**
|
||
* 将目录压缩到ZIP输出流
|
||
*
|
||
* @param dirPath
|
||
* 目录路径
|
||
* @param fileDir
|
||
* 文件信息
|
||
* @param zouts
|
||
* 输出流
|
||
*/
|
||
public static void zipDirectoryToZipFile(String dirPath, File fileDir, ZipOutputStream zouts) {
|
||
if (fileDir.isDirectory()) {
|
||
File[] files = fileDir.listFiles();
|
||
// 空的文件夹
|
||
if (files.length == 0) {
|
||
// 目录信息
|
||
ZipEntry entry = new ZipEntry(getEntryName(dirPath, fileDir));
|
||
try {
|
||
zouts.putNextEntry(entry);
|
||
zouts.closeEntry();
|
||
} catch (Exception e) {
|
||
e.printStackTrace();
|
||
}
|
||
return;
|
||
}
|
||
|
||
for (int i = 0; i < files.length; i++) {
|
||
if (files[i].isFile()) {
|
||
// 如果是文件，则调用文件压缩方法
|
||
FileUtils.zipFilesToZipFile(dirPath, files[i], zouts);
|
||
} else {
|
||
// 如果是目录，则递归调用
|
||
FileUtils.zipDirectoryToZipFile(dirPath, files[i], zouts);
|
||
}
|
||
}
|
||
|
||
}
|
||
|
||
}
|
||
|
||
/**
|
||
* 将文件压缩到ZIP输出流
|
||
*
|
||
* @param dirPath
|
||
* 目录路径
|
||
* @param file
|
||
* 文件
|
||
* @param zouts
|
||
* 输出流
|
||
*/
|
||
public static void zipFilesToZipFile(String dirPath, File file, ZipOutputStream zouts) {
|
||
FileInputStream fin = null;
|
||
ZipEntry entry = null;
|
||
// 创建复制缓冲区
|
||
byte[] buf = new byte[4096];
|
||
int readByte = 0;
|
||
if (file.isFile()) {
|
||
try {
|
||
// 创建一个文件输入流
|
||
fin = new FileInputStream(file);
|
||
// 创建一个ZipEntry
|
||
entry = new ZipEntry(getEntryName(dirPath, file));
|
||
// 存储信息到压缩文件
|
||
zouts.putNextEntry(entry);
|
||
// 复制字节到压缩文件
|
||
while ((readByte = fin.read(buf)) != -1) {
|
||
zouts.write(buf, 0, readByte);
|
||
}
|
||
zouts.closeEntry();
|
||
fin.close();
|
||
System.out.println("添加文件 " + file.getAbsolutePath() + " 到zip文件中!");
|
||
} catch (Exception e) {
|
||
e.printStackTrace();
|
||
}
|
||
}
|
||
|
||
}
|
||
|
||
/**
|
||
* 获取待压缩文件在ZIP文件中entry的名字，即相对于跟目录的相对路径名
|
||
*
|
||
* @param dirPat
|
||
* 目录名
|
||
* @param file
|
||
* entry文件名
|
||
* @return
|
||
*/
|
||
private static String getEntryName(String dirPath, File file) {
|
||
String dirPaths = dirPath;
|
||
if (!dirPaths.endsWith(File.separator)) {
|
||
dirPaths = dirPaths + File.separator;
|
||
}
|
||
String filePath = file.getAbsolutePath();
|
||
// 对于目录，必须在entry名字后面加上"/"，表示它将以目录项存储
|
||
if (file.isDirectory()) {
|
||
filePath += "/";
|
||
}
|
||
int index = filePath.indexOf(dirPaths);
|
||
|
||
return filePath.substring(index + dirPaths.length());
|
||
}
|
||
|
||
/**
|
||
* 修复路径，将 \\ 或 / 等替换为 File.separator
|
||
*
|
||
* @param path
|
||
* @return
|
||
*/
|
||
public static String path(String path) {
|
||
String p = StringUtils.replace(path, "\\", "/");
|
||
// p = StringUtils.join(StringUtils.split(p, "/"), "/");
|
||
if (!StringUtils.startsWithAny(p, "/") && StringUtils.startsWithAny(path, "\\", "/")) {
|
||
p += "/";
|
||
}
|
||
if (!StringUtils.endsWithAny(p, "/") && StringUtils.endsWithAny(path, "\\", "/")) {
|
||
p = p + "/";
|
||
}
|
||
return p;
|
||
}
|
||
|
||
/**
|
||
* 获取文件唯一名称
|
||
*
|
||
* @return
|
||
*/
|
||
public static String getFileKey() {
|
||
String suffixName = DateUtils.getDate("hhmmss");
|
||
return StringUtil.createUUID() + suffixName;
|
||
|
||
}
|
||
|
||
/**
|
||
* 获取文件前缀
|
||
*
|
||
* @param filename
|
||
* @param isDot
|
||
* true:加“.”
|
||
* @return
|
||
*/
|
||
public static String getPrefix(String filename, Boolean isDot) {
|
||
String prefix = "";
|
||
int pos = filename.lastIndexOf('.');
|
||
if (pos > 0 && pos < filename.length() - 1) {
|
||
if (!isDot) {
|
||
pos = pos - 1;
|
||
}
|
||
prefix = filename.substring(0,pos+1);
|
||
}
|
||
return prefix;
|
||
}
|
||
/**
|
||
* 获取文件后缀
|
||
*
|
||
* @param filename
|
||
* @param isDot
|
||
* true:加“.”
|
||
* @return
|
||
*/
|
||
public static String getSuffix(String filename, Boolean isDot) {
|
||
String suffix = "";
|
||
int pos = filename.lastIndexOf('.');
|
||
if (pos > 0 && pos < filename.length() - 1) {
|
||
if (!isDot) {
|
||
pos = pos + 1;
|
||
}
|
||
suffix = filename.substring(pos);
|
||
}
|
||
return suffix;
|
||
}
|
||
|
||
// 文件下载
|
||
public static void fileDownload(HttpServletRequest request,
|
||
HttpServletResponse response,
|
||
String filename,
|
||
String filepath) throws IOException{
|
||
FileInputStream in = null;
|
||
ServletOutputStream out = null;
|
||
try {
|
||
String path = FileUtils.path(Servlets.getRequest().getServletContext().getRealPath(filepath));
|
||
File src = new File(path);
|
||
in = new FileInputStream(src);
|
||
response.reset();
|
||
response.setCharacterEncoding("UTF-8");
|
||
if (request.getHeader("User-Agent").toLowerCase().indexOf("firefox") > 0) {
|
||
filename = new String(filename.getBytes("UTF-8"), "ISO8859-1");
|
||
response.setHeader("Content-Disposition", "attachment;filename=\"" + filename + "\"");
|
||
}
|
||
// IE
|
||
else if (request.getHeader("User-Agent").toUpperCase().indexOf("MSIE") > 0
|
||
|| request.getHeader("User-Agent").toUpperCase().indexOf("LIKE GECKO") > 0) {
|
||
filename = URLEncoder.encode(filename, "UTF-8");
|
||
response.setHeader("Content-Disposition", "attachment; filename=" + filename);
|
||
}
|
||
out = response.getOutputStream();
|
||
byte[] buffer = new byte[1024];
|
||
int len = 0;
|
||
while ((len = in.read(buffer, 0, 1024)) != -1) {
|
||
out.write(buffer, 0, len);
|
||
}
|
||
out.flush();
|
||
} finally {
|
||
if (in != null) {
|
||
in.close();
|
||
in=null;
|
||
}
|
||
if (out != null) {
|
||
out.close();
|
||
out=null;
|
||
}
|
||
}
|
||
}
|
||
/**
|
||
* 获取公钥证书
|
||
* @param inputStream
|
||
* @return
|
||
*/
|
||
public static X509Certificate getCertificateInfo(InputStream inputStream) throws Exception{
|
||
X509Certificate ca = null;
|
||
CertificateFactory certificateFactory = CertificateFactory
|
||
.getInstance("X.509");
|
||
ca= (X509Certificate) certificateFactory
|
||
.generateCertificate(inputStream);
|
||
return ca;
|
||
}
|
||
|
||
/**
|
||
* 计算文件MD5
|
||
* @param file
|
||
* @return
|
||
*/
|
||
public static String getFileMD5(File file){
|
||
if(!file.isFile()){
|
||
return "";
|
||
}
|
||
String md5 = "";
|
||
MessageDigest digest=null;
|
||
FileInputStream in=null;
|
||
byte[] buffer=new byte[1024];
|
||
int len;
|
||
try{
|
||
digest=MessageDigest.getInstance("MD5");
|
||
in=new FileInputStream(file);
|
||
while ((len=in.read(buffer,0,1024)) !=-1) {
|
||
digest.update(buffer,0,len);
|
||
}
|
||
in.close();
|
||
}catch(Exception e){
|
||
e.printStackTrace();
|
||
return "";
|
||
}
|
||
byte[] b = digest.digest();
|
||
for (int i=0; i < b.length; i++) {
|
||
md5 += Integer.toString( (b[i] & 0xff ) + 0x100, 16).substring(1);//加0x100是因为有的b[i]的十六进制只有1位
|
||
}
|
||
// BigInteger bigInt=new BigInteger(1,digest.digest());
|
||
return md5;
|
||
}
|
||
}
|