Java对文件读写管理工具
import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.UnsupportedEncodingException;
public class FileManager {
private final static String PATH = "/home/";
public static void main(String[] args) {
// saveFile("notice", "************");
File[] search = search("noti");
if (search != null) {
for (int i = 0; i < search.length; i++) {
System.out.println(i + " : " + search[i].getName() + " - " + readFile(search[i]));
}
}else {
System.out.println("null");
}
}
public static File[] search(String name) {
File file = new File(PATH);
if (!file.isDirectory()) {
return new File[0];
}
return file.listFiles((f, n) -> {
return n.contains(name);
});
}
public static File[] exactSearch(String name) {
File file = new File(PATH);
if (!file.isDirectory()) {
return new File[0];
}
return file.listFiles((f, n) -> {
return n.equals(name);
});
}
public static String saveFile(String name, String content) {
File file = new File(PATH + "/" + name);
try {
save(file, content.getBytes("UTF-8"));
return file.getName();
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
}
return null;
}
public static String appendToFile(File file, String content) {
String read = readFile(file);
content = read + content;
try {
save(file, content.getBytes("UTF-8"));
return file.getName();
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
}
return null;
}
private static void save(File file, byte[] content) {
try {
FileOutputStream out = new FileOutputStream(file);
out.write(content);
out.flush();
out.close();
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
public static String readFile(File file) {
if (null == file || !file.isFile()) {
return "";
}
StringBuffer sb = new StringBuffer();
try {
FileInputStream in = new FileInputStream(file);
InputStreamReader reader = new InputStreamReader(in, "UTF-8");
BufferedReader br = new BufferedReader(reader);
String line;
while ((line = br.readLine()) != null) {
sb.append(line);
}
br.close();
reader.close();
in.close();
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
return sb.toString();
}
}