/*
* Copyright 2014 Chencp.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* 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.chencp.demo.io;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.io.PrintWriter;
import java.io.Writer;
/**
* WriteToFile.java
* 作者: changping chen
* 联系方式: [email protected]
* 描述:多种方式写文件
*
*/
public class WriteToFile {
/**
* 以字节为单位写文件。适合于写二进制文件,如图片等
* @param fileName 文件名
*/
public static void writeFileByBytes(String fileName){
File file = new File(fileName);
OutputStream out = null;
try {
//打开文输出流
out = new FileOutputStream(file);
String content = "文件内容:\n1,The first line;\n2,The second line.";
byte[] bytes = content.getBytes();
//写入文件
out.write(bytes);
System.out.println("写文件【" + file.getAbsolutePath() + "】成功");
} catch (IOException e) {
// TODO Auto-generated catch block
System.out.println("写文件【" + file.getAbsolutePath() + "】失败");
e.printStackTrace();
} finally {
if (out != null) {
try {
out.close(); //关闭输出文件流
} catch (IOException e) {
// TODO Auto-generated catch block
System.out.println("关闭输出文件流失败");
e.printStackTrace();
}
}
}
}
/**
* 以字符为单位写文件
* @param fileName 文件名
*/
public static void writeFileByChars(String fileName){
File file = new File(fileName);
Writer writer = null;
try {
writer = new OutputStreamWriter(new FileOutputStream(file));
String content = "文件内容:\n1,The first line;\n2,The second line.";
writer.write(content);
System.out.println("写文件【" + file.getAbsolutePath() + "】成功");
} catch (IOException e) {
// TODO Auto-generated catch block
System.out.println("写文件【" + file.getAbsolutePath() + "】失败");
e.printStackTrace();
} finally {
if (writer != null) {
try {
writer.close(); //关闭输出文件流
} catch (IOException e) {
// TODO Auto-generated catch block
System.out.println("关闭输出文件流失败");
e.printStackTrace();
}
}
}
}
/**
* 以行为单位写文件
* @param fileName 文件名
*/
public static void writeFileByLines(String fileName){
File file = new File(fileName);
PrintWriter writer = null;
try {
writer = new PrintWriter(new FileOutputStream(file));
//写入各种类型数据
writer.println("文件内容:");
writer.print(true);
writer.print(123);
writer.println();
writer.flush();//写入文件
System.out.println("写文件【" + file.getAbsolutePath() + "】成功");
} catch (IOException e) {
// TODO Auto-generated catch block
System.out.println("写文件【" + file.getAbsolutePath() + "】失败");
e.printStackTrace();
} finally {
if (writer != null) {
writer.close(); //关闭输出文件流
}
}
}
/**
* @param args
*/
public static void main(String[] args) {
// TODO Auto-generated method stub
String fileName = null;
WriteToFile test = new WriteToFile();
fileName = "d:/temp/tempfile0.txt";
test.writeFileByBytes(fileName);
fileName = "d:/temp/tempfile1.txt";
test.writeFileByChars(fileName);
fileName = "d:/temp/tempfile2.txt";
test.writeFileByLines(fileName);
}
}
多种方式实现写文件
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转载自blog.csdn.net/changpingchen/article/details/38684843
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