自己封装的一个编码转换工具类

java做编码转换有两中方法

1.基于流的编码转换

  InputStream is = Main.class.getResourceAsStream(fileName);
  BufferedReader br = new BufferedReader(new InputStreamReader(is, "utf-8"));
  String tmp;
  while((tmp = br.readLine()) != null){
    System.out.println(tmp);
  }

 

 

 

2.基于字符的编码转换

  InputStream is = Main.class.getResourceAsStream(fileName);
  BufferedReader br = new BufferedReader(new InputStreamReader(is, "utf-8"));
  String tmp;
  while((tmp = br.readLine()) != null){
    System.out.println(tmp);
  }

 

 

我这里用的是第一种方法，其他不多说了直接贴代码了

 

import java.io.ByteArrayInputStream;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.Reader;

public class EncodingConverter {

	public static final String UTF_8 = "UTF-8";
	
	public static InputStream converter(InputStream is, String srcEnc, String tarEnc)
			throws IOException {

		// builder a reader using source encoding
		Reader reader = new InputStreamReader(is, srcEnc);
		StringBuilder sb = new StringBuilder();

		// read content
		int c;
		while ((c = reader.read()) != -1) {
			sb.append((char) c);
		}
		reader.close();

		// get byte array
		InputStream tarIs = new ByteArrayInputStream(sb.toString().getBytes(tarEnc));
		return tarIs;
	}

	public static InputStream converterToUTF(InputStream is, String srcEnc)
			throws IOException {

		// builder a reader using source encoding
		Reader reader = new InputStreamReader(is, srcEnc);
		StringBuilder sb = new StringBuilder();

		// read content
		int c;
		while ((c = reader.read()) != -1) {
			sb.append((char) c);
		}
		reader.close();

		// get byte array
		InputStream tarIs = new ByteArrayInputStream(sb.toString().getBytes("utf-8"));
		return tarIs;
	}

	public static byte[] converterToByteArray(InputStream is, String srcEnc, String tarEnc)
			throws IOException {

		// builder a reader using source encoding
		Reader reader = new InputStreamReader(is, srcEnc);
		StringBuilder sb = new StringBuilder();

		// read content
		int c;
		while ((c = reader.read()) != -1) {
			sb.append((char) c);
		}
		reader.close();

		// get byte array
		return sb.toString().getBytes(tarEnc);
	}

	public static byte[] converterToUTFByteArray(InputStream is, String srcEnc)
			throws IOException {

		// builder a reader using source encoding
		Reader reader = new InputStreamReader(is, srcEnc);
		StringBuilder sb = new StringBuilder();

		// read content
		int c;
		while ((c = reader.read()) != -1) {
			sb.append((char) c);
		}
		reader.close();

		// get byte array
		return sb.toString().getBytes("utf-8");
	}

	public static String converterToString(InputStream is, String srcEnc, String tarEnc)
			throws IOException {

		// builder a reader using source encoding
		Reader reader = new InputStreamReader(is, srcEnc);
		StringBuilder sb = new StringBuilder();

		// read content
		int c;
		while ((c = reader.read()) != -1) {
			sb.append((char) c);
		}
		reader.close();

		return sb.toString();
	}

	public static String converterToUTFString(InputStream is, String srcEnc)
			throws IOException {

		// builder a reader using source encoding
		Reader reader = new InputStreamReader(is, srcEnc);
		StringBuilder sb = new StringBuilder();

		// read content
		int c;
		while ((c = reader.read()) != -1) {
			sb.append((char) c);
		}
		reader.close();

		return sb.toString();
	}

	public static InputStream converter(byte[] bytes, String srcEnc, String tarEnc)
			throws IOException {

		// builder a reader using source encoding
		InputStream is = new ByteArrayInputStream(bytes);
		Reader reader = new InputStreamReader(is, srcEnc);
		StringBuilder sb = new StringBuilder();

		// read content
		int c;
		while ((c = reader.read()) != -1) {
			sb.append((char) c);
		}
		reader.close();

		// get byte array
		InputStream tarIs = new ByteArrayInputStream(sb.toString().getBytes(tarEnc));
		return tarIs;
	}

	public static InputStream converterToUTF(byte[] bytes, String srcEnc)
			throws IOException {

		// builder a reader using source encoding
		InputStream is = new ByteArrayInputStream(bytes);
		Reader reader = new InputStreamReader(is, srcEnc);
		StringBuilder sb = new StringBuilder();

		// read content
		int c;
		while ((c = reader.read()) != -1) {
			sb.append((char) c);
		}
		reader.close();

		// get byte array
		InputStream tarIs = new ByteArrayInputStream(sb.toString().getBytes("utf-8"));
		return tarIs;
	}

	public static byte[] converterToByteArray(byte[] bytes, String srcEnc, String tarEnc)
			throws IOException {

		// builder a reader using source encoding
		InputStream is = new ByteArrayInputStream(bytes);
		Reader reader = new InputStreamReader(is, srcEnc);
		StringBuilder sb = new StringBuilder();

		// read content
		int c;
		while ((c = reader.read()) != -1) {
			sb.append((char) c);
		}
		reader.close();

		// get byte array
		return sb.toString().getBytes(tarEnc);
	}

	public static byte[] converterToUTFByteArray(byte[] bytes, String srcEnc)
			throws IOException {

		// builder a reader using source encoding
		InputStream is = new ByteArrayInputStream(bytes);
		Reader reader = new InputStreamReader(is, srcEnc);
		StringBuilder sb = new StringBuilder();

		// read content
		int c;
		while ((c = reader.read()) != -1) {
			sb.append((char) c);
		}
		reader.close();

		// get byte array
		return sb.toString().getBytes("utf-8");
	}

	public static String converterToString(byte[] bytes, String srcEnc, String tarEnc)
			throws IOException {

		// builder a reader using source encoding
		InputStream is = new ByteArrayInputStream(bytes);
		Reader reader = new InputStreamReader(is, srcEnc);
		StringBuilder sb = new StringBuilder();

		// read content
		int c;
		while ((c = reader.read()) != -1) {
			sb.append((char) c);
		}
		reader.close();

		return sb.toString();
	}

	public static String converterToUTFString(byte[] bytes, String srcEnc)
			throws IOException {

		// builder a reader using source encoding
		InputStream is = new ByteArrayInputStream(bytes);
		Reader reader = new InputStreamReader(is, srcEnc);
		StringBuilder sb = new StringBuilder();

		// read content
		int c;
		while ((c = reader.read()) != -1) {
			sb.append((char) c);
		}
		reader.close();

		return sb.toString();
	}
	public static void main(String[] args) throws IOException {
		InputStream is = new FileInputStream("G:/out.txt");
		is = converter(is, "utf-8", "gbk");
		Reader isr = new InputStreamReader(is, "gbk");
		StringBuilder sb = new StringBuilder();
		int c;
		while ((c = isr.read()) != -1) {
			sb.append((char) c);
		}
		is.close();
		System.out.println(sb.toString());
	}
}

 

评论

2 楼 u148 2014-10-13  

java.io.IOException: Stream closed
at org.apache.catalina.connector.InputBuffer.read(InputBuffer.java:325)
at org.apache.catalina.connector.CoyoteInputStream.read(CoyoteInputStream.java:193)
at sun.nio.cs.StreamDecoder.readBytes(StreamDecoder.java:283)
at sun.nio.cs.StreamDecoder.implRead(StreamDecoder.java:325)
at sun.nio.cs.StreamDecoder.read(StreamDecoder.java:177)
at java.io.InputStreamReader.read(InputStreamReader.java:184)
at java.io.BufferedReader.fill(BufferedReader.java:154)
at java.io.BufferedReader.read(BufferedReader.java:175)

有时候会报这个错误.

1 楼 tutu1982 2009-05-02  

。。。。。。。。。。。