com.qq.tars.common.util.FileUtil Maven / Gradle / Ivy
/**
* Tencent is pleased to support the open source community by making Tars available.
*
* Copyright (C) 2016 THL A29 Limited, a Tencent company. All rights reserved.
*
* Licensed under the BSD 3-Clause License (the "License"); you may not use this file except
* in compliance with the License. You may obtain a copy of the License at
*
* https://opensource.org/licenses/BSD-3-Clause
*
* Unless required by applicable law or agreed to in writing, software distributed
* under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
* CONDITIONS OF ANY KIND, either express or implied. See the License for the
* specific language governing permissions and limitations under the License.
*/
package com.qq.tars.common.util;
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.io.StringWriter;
import java.util.List;
import com.qq.tars.rpc.exc.TarsException;
public class FileUtil {
public static String readFileToString(String fileName, String charset) {
String result = null;
StringWriter sw = null;
BufferedReader br = null;
try {
sw = new StringWriter();
br = new BufferedReader(new InputStreamReader(new FileInputStream(fileName), charset));
int ch = 0;
while ((ch = br.read()) != -1)
sw.write(ch);
result = sw.toString();
} catch (Throwable t) {
throw new TarsException("FileUtil|read error", t);
} finally {
try {
if (sw != null) sw.close();
if (br != null) br.close();
} catch (Throwable tt) {
tt.printStackTrace();
}
}
return result;
}
public static void writeStringToFile(String fileName, String content, String charset) {
BufferedWriter bw = null;
try {
File file = new File(fileName);
if (!file.getParentFile().exists()) {
file.getParentFile().mkdirs();
}
bw = new BufferedWriter(new OutputStreamWriter(new FileOutputStream(file), charset));
bw.write(content);
} catch (Throwable t) {
throw new TarsException("FileUtil|write error", t);
} finally {
try {
bw.close();
} catch (Throwable tt) {
tt.printStackTrace();
}
}
}
public static void writeLinesToFile(String fileName, List lines, String charset) {
BufferedWriter bw = null;
try {
bw = new BufferedWriter(new OutputStreamWriter(new FileOutputStream(fileName), charset));
for (String line : lines)
bw.write(line + "\n");
bw.flush();
} catch (Throwable t) {
throw new TarsException("FileUtil|write lines error", t);
} finally {
try {
bw.close();
} catch (Throwable tt) {
tt.printStackTrace();
}
}
}
public static void appendLinesToFile(String fileName, List lines, String charset) {
BufferedWriter bw = null;
try {
bw = new BufferedWriter(new OutputStreamWriter(new FileOutputStream(fileName, true), charset));
for (String line : lines)
bw.write(line.trim() + "\n");
bw.flush();
} catch (Throwable t) {
throw new TarsException("FileUtil|write lines error", t);
} finally {
try {
bw.close();
} catch (Throwable tt) {
tt.printStackTrace();
}
}
}
public static String readFileToString(String fileName) {
return readFileToString(fileName, "UTF-8");
}
public static void writeStringToFile(String fileName, String content) {
writeStringToFile(fileName, content, "UTF-8");
}
public static void appendLinesToFile(String fileName, List lines) {
appendLinesToFile(fileName, lines, "UTF-8");
}
public static void writeLinesToFile(String fileName, List lines) {
writeLinesToFile(fileName, lines, "UTF-8");
}
}