解决httpclient传中文乱码问题

/*
* ====================================================================
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements.  See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership.  The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License.  You may obtain a copy of the License at
*
*   http://www.apache.org/licenses/LICENSE-2.0 *
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied.  See the License for the
* specific language governing permissions and limitations
* under the License.
* ====================================================================
*
* This software consists of voluntary contributions made by many
* individuals on behalf of the Apache Software Foundation.  For more
* information on the Apache Software Foundation, please see
* <http://www.apache.org/>.
*
*/

package org.apache.http;

import java.nio.charset.Charset;

/**
* Commons constants.
*
* @since 4.2
*/
public final class Consts {

public static final int CR = 13; // <US-ASCII CR, carriage return (13)>
public static final int LF = 10; // <US-ASCII LF, linefeed (10)>
public static final int SP = 32; // <US-ASCII SP, space (32)>
public static final int HT = 9;  // <US-ASCII HT, horizontal-tab (9)>

public static final Charset UTF_8 = Charset.forName("UTF-8");
public static final Charset ASCII = Charset.forName("US-ASCII");
public static final Charset ISO_8859_1 = Charset.forName("ISO-8859-1");

private Consts() {
}

}

/*
* ====================================================================
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements.  See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership.  The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License.  You may obtain a copy of the License at
*
*   http://www.apache.org/licenses/LICENSE-2.0 *
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied.  See the License for the
* specific language governing permissions and limitations
* under the License.
* ====================================================================
*
* This software consists of voluntary contributions made by many
* individuals on behalf of the Apache Software Foundation.  For more
* information on the Apache Software Foundation, please see
* <http://www.apache.org/>.
*
*/
package org.apache.http.util;

import java.io.UnsupportedEncodingException;

import org.apache.http.Consts;

/**
* The home for utility methods that handle various encoding tasks.
*
*
* @since 4.0
*/
public final class EncodingUtils {

/**
* Converts the byte array of HTTP content characters to a string. If
* the specified charset is not supported, default system encoding
* is used.
*
* @param data the byte array to be encoded
* @param offset the index of the first byte to encode
* @param length the number of bytes to encode
* @param charset the desired character encoding
* @return The result of the conversion.
*/
public static String getString(
final byte[] data,
int offset,
int length,
String charset
) {

if (data == null) {
throw new IllegalArgumentException("Parameter may not be null");
}

if (charset == null || charset.length() == 0) {
throw new IllegalArgumentException("charset may not be null or empty");
}

try {
return new String(data, offset, length, charset);
} catch (UnsupportedEncodingException e) {
return new String(data, offset, length);
}
}

/**
* Converts the byte array of HTTP content characters to a string. If
* the specified charset is not supported, default system encoding
* is used.
*
* @param data the byte array to be encoded
* @param charset the desired character encoding
* @return The result of the conversion.
*/
public static String getString(final byte[] data, final String charset) {
if (data == null) {
throw new IllegalArgumentException("Parameter may not be null");
}
return getString(data, 0, data.length, charset);
}

/**
* Converts the specified string to a byte array.  If the charset is not supported the
* default system charset is used.
*
* @param data the string to be encoded
* @param charset the desired character encoding
* @return The resulting byte array.
*/
public static byte[] getBytes(final String data, final String charset) {

if (data == null) {
throw new IllegalArgumentException("data may not be null");
}

if (charset == null || charset.length() == 0) {
throw new IllegalArgumentException("charset may not be null or empty");
}

try {
return data.getBytes(charset);
} catch (UnsupportedEncodingException e) {
return data.getBytes();
}
}

/**
* Converts the specified string to byte array of ASCII characters.
*
* @param data the string to be encoded
* @return The string as a byte array.
*/
public static byte[] getAsciiBytes(final String data) {

if (data == null) {
throw new IllegalArgumentException("Parameter may not be null");
}

try {
return data.getBytes(Consts.ASCII.name());
} catch (UnsupportedEncodingException e) {
throw new Error("HttpClient requires ASCII support");
}
}

/**
* Converts the byte array of ASCII characters to a string. This method is
* to be used when decoding content of HTTP elements (such as response
* headers)
*
* @param data the byte array to be encoded
* @param offset the index of the first byte to encode
* @param length the number of bytes to encode
* @return The string representation of the byte array
*/
public static String getAsciiString(final byte[] data, int offset, int length) {

if (data == null) {
throw new IllegalArgumentException("Parameter may not be null");
}

try {
return new String(data, offset, length, Consts.ASCII.name());
} catch (UnsupportedEncodingException e) {
throw new Error("HttpClient requires ASCII support");
}
}

/**
* Converts the byte array of ASCII characters to a string. This method is
* to be used when decoding content of HTTP elements (such as response
* headers)
*
* @param data the byte array to be encoded
* @return The string representation of the byte array
*/
public static String getAsciiString(final byte[] data) {
if (data == null) {
throw new IllegalArgumentException("Parameter may not be null");
}
return getAsciiString(data, 0, data.length);
}

/**
* This class should not be instantiated.
*/
private EncodingUtils() {
}

}

而us-ascii常有乱码问题，故我改了器源码后，又做成jar包使用，发现者问题不复存在。现在把修改的后的文件发出来给大家使用，一切正常，不存在有些类不能用的问题。
下载地址：http://download.csdn.net/detail/fangmingshijie/4746796