java reader file & writer file

package com.xjh.dh;

import java.io.BufferedReader;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;

/**
 * 
 * ok
 * 
 * @author xiejiaohui
 *
 */
public class FileCheck {

	public static void main(String[] args) throws Exception {
		String file = "c:\\a.csv";
		String write_ok = "c:\\a_ok.csv";
		String write_er = "c:\\a_er.csv";
		
		// 没有乱码
		String read_charset = "gbk"; // 读文件的字符集
		String writer_charset = "utf-8"; // 写文件的字符集
		
		// 乱码
//		String read_charset = "utf-8";
//		String writer_charset = "gbk";
		
		// 乱码
//		String read_charset = "utf-8";
//		String writer_charset = "utf-8";
		
		// 乱码
//		String read_charset = "gbk";
//		String writer_charset = "gbk";
		
		// 乱码
//		String read_charset = "iso-8859-1";
//		String writer_charset = "iso-8859-1";
		
//		String charset = "utf-8";
//		String charset = "iso-8859-1";
//		String charset = "gb2312";
		InputStreamReader inputStreamReader = new InputStreamReader(
				new FileInputStream(file), read_charset);
		BufferedReader bufferedReader = new BufferedReader(inputStreamReader);

		FileOutputStream outputStream_ok = new FileOutputStream(write_ok);
		FileOutputStream outputStream_er = new FileOutputStream(write_er);

		OutputStreamWriter writer_ok = new OutputStreamWriter(outputStream_ok,
				writer_charset);
		OutputStreamWriter writer_er = new OutputStreamWriter(outputStream_er,
				writer_charset);
		
		try {
			String s = null;
			int i = 0;
			while ((s = bufferedReader.readLine()) != null) {
				String[] s2 = s.split("\\,");
				if (s2.length != 54) {
//					System.out.println("error in line: " + (i + 1) + " " + s);
					System.out.println(s);
					i++;
					writer_er.append(s);
					writer_er.append("\n");
					continue;
				} else {
					writer_ok.append(s);
					writer_ok.append("\n");
				}
				i++;
			}
			System.out.println("ok " + i );
		} catch (Exception e) {
			e.printStackTrace();
		} finally {
			writer_ok.close();
			writer_er.close();
			bufferedReader.close();
		}
	}
}

以下两个文件会出现乱码

package com.xjh.dh;

import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileWriter;
import java.io.InputStreamReader;

/**
 * 
 * 写出来的文件有乱码
 * 
 * @author xiejiaohui
 *
 */
public class FileCheck2 {

	public static void main(String[] args) throws Exception {
		String file = "c:\\a.csv";
		FileWriter fileWriter_ok = new FileWriter(new File("c:\\a_ok.csv"));
		FileWriter fileWriter_er = new FileWriter(new File("c:\\a_er.csv"));
		String charset = "gbk";
//		 String charset = "utf-8";
//		String charset = "iso-8859-1";
//		String charset = "gb2312";
		InputStreamReader inputStreamReader = new InputStreamReader(
				new FileInputStream(file), charset);
		BufferedReader bufferedReader = new BufferedReader(inputStreamReader);		
		
		try {
			String s = null;
			int i = 0;
			while ((s = bufferedReader.readLine()) != null) {
				String[] s2 = s.split("\\,");
				if (s2.length != 54) {
					System.out.println("error in line: " + (i + 1) + " " + s);
//					System.out.println(s);
					i++;
					fileWriter_er.append(s);
					fileWriter_er.append("\n");
					continue;
				} else {
					fileWriter_ok.append(s);
					fileWriter_ok.append("\n");
				}
				i++;
			}
			System.out.println("ok " + i );
		} catch (Exception e) {
			e.printStackTrace();
		} finally {
			fileWriter_er.close();
			fileWriter_ok.close();
			bufferedReader.close();
		}

	}

}

package com.xjh.dh;

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

/**
 * 
 * 写出来的文件有乱码
 * 
 * @author xiejiaohui
 *
 */
public class FileCheck3 {

	public static void main(String[] args) throws Exception {
		
		BufferedReader bufferedReader = new BufferedReader(new FileReader(
				"c:\\a.csv"));
		FileWriter fileWriter_ok = new FileWriter(new File(
				"c:\\a_ok.csv"));
		FileWriter fileWriter_er = new FileWriter(new File(
				"c:\\a_er.csv"));

		try {
			String s = null;
			int i = 0;
			while ((s = bufferedReader.readLine()) != null) {
				String[] s2 = s.split("\\,");
				if (s2.length != 54) {
					System.out.println("error in line: " + (i + 1) + " " + s);
//					System.out.println(s);
					i++;
					fileWriter_er.append(s);
					fileWriter_er.append("\n");
					continue;
				} else {
					fileWriter_ok.append(s);
					fileWriter_ok.append("\n");
				}
				i++;
			}
			System.out.println("ok " + i );
		} catch (Exception e) {
			e.printStackTrace();
		} finally {
			fileWriter_er.close();
			fileWriter_ok.close();
			bufferedReader.close();
		}

	}

}