Question

java.关于写入文件，文字编码问题！

import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.FileReader;
import java.io.FileWriter;

public class Test {
public static void main(String[] args) throws Exception {
String id = "0001";
String text = "hhh";
String line = null;
BufferedReader br = new BufferedReader(new FileReader("c:/content1.txt"));
BufferedWriter bw = new BufferedWriter(new FileWriter("c:/content2.txt"));
while((line = br.readLine()) != null) {
if(line.contains(id))
line = id + " " + text;
bw.write(line);
bw.newLine();
}
bw.flush();
bw.close();
br.close();
}
}

写入的字体都是 ？？？？？ 这样的
估计是因为 写入格式 不是 utf-8
怎么设置 写入格式为 utf-8

Answer 1

package p1;

import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;

public class Test
{
	public static void main ( String[] args ) throws Exception
	{
		String id = "0001";
		String text = "hhh";
		String line = null;
		// 自行调整charset即可
		BufferedReader br = new BufferedReader (new InputStreamReader (new FileInputStream ("c:/content1.txt"), "GBK"));
		BufferedWriter bw = new BufferedWriter (new OutputStreamWriter (new FileOutputStream ("c:/content1.txt"), "UTF-8"));
		while (( line = br.readLine () ) != null)
		{
			if (line.contains (id))
				line = id + " " + text;
			bw.write (line);
			bw.newLine ();
		}
		bw.flush ();
		bw.close ();
		br.close ();
	}
}

Answer 2

编码格式在安装的时候应该有提示吧

Answer 3