FileUtils.java
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package com.huaheng.mobilewms.util;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.IOException;
import java.io.StringReader;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
public class FileUtils {
public static String PATH_LOG = "/sdcard/wms/";
/**
* 取dir下指定扩展名的文件列表
* @param dir
* @param ext
* @return
*/
public static List<File> listDirFiles(String dir, String ext) {
File[] fileNames = new File(dir).listFiles();
List<File> listExt = new ArrayList<>();
ext = ext.toLowerCase();
for (int i = 0; i < fileNames.length; i++) {
File f = fileNames[i];
if (f.getName().toLowerCase().endsWith(ext)) {
listExt.add(f);
}
}
return listExt;
}
/**
* 取dir下指定扩展名的文件名列表
* @param dir
* @param ext
* @return
*/
public static List<String> listDirFileNames(String dir, String ext) {
List<File> fileList = listDirFiles(dir, ext);
List<String> fileNameList = new ArrayList<>();
for (File f : fileList) {
fileNameList.add(f.getName());
}
return fileNameList;
}
/**取日志文件**/
public static File[] getCrashLogFiles() {
List<File> list = listDirFiles(PATH_LOG, ".txt");
File[] files = new File[list.size()];
//最新的日志放前面
Collections.reverse(list);
list.toArray(files);
return files;
}
/**取日志文件名**/
public static String[] getCrashLogNames(boolean needSeq) {
List<String> list = listDirFileNames(PATH_LOG, ".txt");
//最新的日志放前面
Collections.reverse(list);
String[] arr = new String[list.size()];
list.toArray(arr);
//加上序号
if (needSeq) {
for (int i = 0; i < arr.length; i++) {
arr[i] = String.valueOf(arr.length - i) + ". " + arr[i];
}
}
return arr;
}
public static String readFileToString(File file){
StringBuffer sbf = new StringBuffer();
FileReader fr = null;
BufferedReader br = null;
try {
fr = new FileReader(file);
br = new BufferedReader(fr);
String line = null;
while ((line = br.readLine()) != null) {
sbf.append(line);
sbf.append("\n");
}
} catch (FileNotFoundException e) {
sbf.append("找不到文件：" + file.getAbsolutePath());
} finally {
try {
if (br != null) br.close();
if (fr != null) fr.close();
} catch (IOException ioe) {
}
return sbf.toString();
}
}
}