java 读写UTF-8文件的方法

需导入的包：

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.OutputStreamWriter;
import java.io.UnsupportedEncodingException;
import java.util.List;

　　　　

java 读写UTF-8文件的方法： 

	private static void readUtf8File(String fileName) {
		// 以UTF-8编码读取文件：
		FileInputStream fis = null;
		InputStreamReader isr = null;
		String fileContent = "";

		try {
			fis = new FileInputStream(fileName);
			isr = new InputStreamReader(fis, "UTF-8");
			BufferedReader br = new BufferedReader(isr);
			String line = null;
			while ((line = br.readLine()) != null) {
				fileContent += line;
				fileContent += "
"; // 补上换行符
			}
			System.out.println(fileContent);

		} catch (FileNotFoundException e) {
			e.printStackTrace();
		} catch (UnsupportedEncodingException e) {
			e.printStackTrace();
		} catch (IOException e) {
			e.printStackTrace();
		} finally {
			try {
				isr.close();
			} catch (IOException e) {
				e.printStackTrace();
			}
		}
	}

　　

调用例子： 

	public static void main(String[] args) throws Exception {
		// 读取UTF-8文件
		readUtf8File("d:\test.txt");
		// 写入UTF-8文件
		writeUtf8File("d:\test1.txt","要写入文件的内容");
	}