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

[code]
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();
}

}

}

[/code]

[code]
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();
}

}

}

[/code]