文件操作Java工具类
import java.io.BufferedInputStream; import java.io.BufferedOutputStream; import java.io.BufferedReader; import java.io.BufferedWriter; import java.io.File; import java.io.FileInputStream; import java.io.FileOutputStream; import java.io.FileWriter; import java.io.IOException; import java.io.InputStream; import java.io.InputStreamReader; import java.io.OutputStream; import java.io.OutputStreamWriter; /** * 文件工具类 * FileUtils * @author LXY * @version 1.0 */ public class FileUtils { /** * 读取文件内容（使用UTF-8编码） * @param filePath 输出文件路径 * @return * @throws Exception */ public static String readFileUTF8(String filePath) throws Exception{ File file = new File(filePath); FileInputStream fis = new FileInputStream(file); BufferedReader br = new BufferedReader(new InputStreamReader(fis,"UTF-8")); String fileContent = ""; String temp = ""; while ((temp = br.readLine()) != null) { fileContent = fileContent+temp; } br.close(); fis.close(); return fileContent; } /** * 将文件内容写入文件（使用UTF-8编码） * @param content 文件内容 * @param filePath 输出文件路径 * @throws Exception */ public static void writeFileUTF8(String content,String filePath) throws Exception{ createDir(filePath); File file = new File(filePath); FileOutputStream fos = new FileOutputStream(file); BufferedWriter bw = new BufferedWriter(new OutputStreamWriter(fos,"UTF-8")); bw.write(content); bw.flush(); bw.close(); fos.close(); } /** * 写文件 * @param outputPath 输出文件路径 * @param is 输入流 * @param isApend 是否追加 * @throws IOException */ public static void writeFile(InputStream is,String outputPath,boolean isApend) throws IOException{ FileInputStream fis = (FileInputStream)is; createDir(outputPath); FileOutputStream fos = new FileOutputStream(outputPath,isApend); byte[] bs = new byte[1024*16]; int len = -1; while ((len = fis.read(bs)) != -1) { fos.write(bs, 0, len); } fos.close(); fis.close(); } /** * copy文件 * @param is 输入流 * @param outputPath 输出文件路径 * @throws Exception */ public static void writeFile(InputStream is,String outputPath) throws Exception{ InputStream bis=null; OutputStream bos=null; createDir(outputPath); bis=new BufferedInputStream(is); bos=new BufferedOutputStream(new FileOutputStream(outputPath)); byte[] bs = new byte[1024*10]; int len = -1; while ((len = bis.read(bs)) != -1) { bos.write(bs, 0, len); } bos.flush(); bis.close(); bos.close(); } /** * 写文件 * @param outputPath 输出文件路径 * @param inPath 输入文件路径 * @throws IOException */ public static void writeFile(String inPath,String outputPath,boolean isApend) throws IOException{ if(new File(inPath).exists()){ FileInputStream fis = new FileInputStream(inPath); writeFile(fis,outputPath,isApend); }else { System.out.println("文件copy失败，由于源文件不存在!"); } } /** * 将字符串写到文件内 * @param outputPath 输出文件路径 * @param msg 字符串 * @param isApend 是否追加 * @throws IOException */ public static void writeContent(String msg,String outputPath,boolean isApend) throws IOException{ BufferedWriter bw = new BufferedWriter(new FileWriter(outputPath,isApend)); bw.write(msg); bw.flush(); bw.close(); } /** * 删除文件夹下的所有内容,包括本文件夹 * @param path 删除文件路径 * @throws IOException */ public static void delFileOrDerectory(String path)throws IOException{ File file = new File(path); if(file.exists()){ if(file.isDirectory()){ File[] files = file.listFiles(); for(int i=0;i<files.length;i++){ File subFile = files[i]; delFileOrDerectory(subFile.getAbsolutePath()); } file.delete(); }else{ file.delete(); } } } /** * 如果欲写入的文件所在目录不存在，需先创建 * @param outputPath 输出文件路径 */ public static void createDir(String outputPath){ File outputFile = new File(outputPath); File outputDir = outputFile.getParentFile(); if(!outputDir.exists()){ outputDir.mkdirs(); } } }
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