java按指定编码写入和读取文件内容的类

InputStreamReader类是从字节到字符的转化桥梁，OutputstreamWriter类是从字符到字节的转化桥梁。所以如果需要添加上编码时只需要在生成IInputStreamReader或者OutputstreamWriter对象的时候加上编码格式即可。

对于文件，只需要从里到外包装FileInputStream,InputStreamReader，BufferedReader即可。即先是读到字节，然后字节转化为字符，然后把字符送到缓冲区。

--------------------- 本文来自 蝌蚪123456 的优快云 博客 ，全文地址请点击：https://blog.youkuaiyun.com/u010339647/article/details/52002288?utm_source=copy

 

 

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import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
 
public class ReadWriteFileWithEncode {
 
    public static void write(String path, String content, String encoding)
            throws IOException {
        File file = new File(path);
        file.delete();
        file.createNewFile();
        BufferedWriter writer = new BufferedWriter(new OutputStreamWriter(
                new FileOutputStream(file), encoding));
        writer.write(content);
        writer.close();
    }
 
    public static String read(String path, String encoding) throws IOException {
        String content = "";
        File file = new File(path);
        BufferedReader reader = new BufferedReader(new InputStreamReader(
                new FileInputStream(file), encoding));
        String line = null;
        while ((line = reader.readLine()) != null) {
            content += line + "\n";
        }
        reader.close();
        return content;
    }
 
    public static void main(String[] args) throws IOException {
        String content = "中文内容";
        String path = "c:/test.txt";
        String encoding = "utf-8";
        ReadWriteFileWithEncode.write(path, content, encoding);
        System.out.println(ReadWriteFileWithEncode.read(path, encoding));
    }
}