URL中文问题

最近使用HttpClient,和Java的java.net.URL，url有中文都会失败。

听徐师兄说HttpClient有URI这个类可以使用：

URI uri = new URI(url,false,"UTF-8");
String url = uri.toString();

 例如，发送一个get请求获得一个带有中文链接的图片：

import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.FileOutputStream;
import java.io.IOException;

import org.apache.commons.httpclient.HttpClient;
import org.apache.commons.httpclient.HttpException;
import org.apache.commons.httpclient.URI;
import org.apache.commons.httpclient.methods.GetMethod;
/**
 * @author fuliang
 */
public class Test {
	public static void main(String[] args) throws HttpException, IOException {
		String url = "http://www.byecity.com/photoocean/photo/全球图片/亚洲/柬埔寨/s/7723132569.jpg";
		GetMethod get = null;
		BufferedInputStream bis = null;
		BufferedOutputStream bos = null;
		
		try {
			URI uri = new URI(url,false,"UTF-8");
			HttpClient hc = new HttpClient();
			get = new GetMethod(uri.toString());
			int status = hc.executeMethod(get);
			if (status == 200) {
				bis = new BufferedInputStream(get
						.getResponseBodyAsStream());
				bos = new BufferedOutputStream(
						new FileOutputStream("/home/fuliang/photo.jpg"));

				byte[] buffer = new byte[1024];
				int len = 0;
				while ((len = bis.read(buffer)) != -1) {
					bos.write(buffer, 0, len);
				}
			}
		} finally {
			if(get != null){
				get.releaseConnection();
			}
			if(bis != null){
				bis.close();
			}
			if(bos != null){
				bos.close();
			}
		}
	}
}

 如果使用java.net.URL而不想引入httpclient的包，我写了一个方法可以基本解决中文url的问题，对非ascii码进行encoding（健壮性肯定没有httpclient那个好，也可以直接把httpclient中的那个源码摘出来用）：

import java.io.UnsupportedEncodingException;
import java.net.URLEncoder;

public class URLUtil {
	public static String encodeURL(String url,String encode)
			throws UnsupportedEncodingException {
		StringBuilder sb = new StringBuilder();
		StringBuilder noAsciiPart = new StringBuilder();
		for (int i = 0; i < url.length(); i++) {
			char c = url.charAt(i);
			if (c > 255) {
				noAsciiPart.append(c);
			} else {
				if (noAsciiPart.length() != 0) {
					sb.append(URLEncoder.encode(noAsciiPart.toString(),encode));
					noAsciiPart.delete(0, noAsciiPart.length());
				}
				sb.append(c);
			}
		}
		return sb.toString();
	}
}

举一个同样使用java.net.URL下载的例子：

import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLConnection;

import org.apache.log4j.Logger;

public class Downloader {
	private static Logger logger = Logger.getLogger(Downloader.class);

	public static boolean download(String urlString, String savePath) {
		BufferedInputStream bis = null;
		BufferedOutputStream bos = null;
		try {
			urlString = URLUtil.encodeURL(urlString,"UTF-8");
			bis = new BufferedInputStream(
					getDownloadInputStream(urlString));

			bos = new BufferedOutputStream(new FileOutputStream(savePath));

			byte[] buffer = new byte[2048];
			int len;
			while ((len = bis.read(buffer,0,buffer.length)) != -1) {
				bos.write(buffer, 0, len);
			}
		} catch (MalformedURLException e) {
			logger.error("Error url: " + urlString, e);
			return false;
		} catch (IOException e) {
			logger.error("Get connection " + urlString + "failed",
					e);
			return false;
		} finally {
			try {
				if (bis != null) {
					bis.close();
				}
				if (bos != null) {
					bos.close();
				}
			} catch (IOException e) {
				logger.error("close failed", e);
				return false;
			}
		}
		return true;
	}
	
	private static InputStream getDownloadInputStream(String urlString)
			throws IOException {
		URL url = new URL(urlString);
		URLConnection connection = url.openConnection();
		InputStream inputStream = connection.getInputStream();
		return inputStream;
	}

	public static OutputStream getSavaOutputStream(String path)
			throws FileNotFoundException {
		OutputStream fileOutputStream = new FileOutputStream(path);
		return fileOutputStream;
	}
	
	public static void main(String[] args) {
		download("http://www.byecity.com/photoocean/photo/全球图片/欧洲/希腊/s/76291161.jpg","/home/fuliang/test.jpg");
	}
}

 

 

 

评论

4 楼 srhlwdamon 2015-03-03  

太感谢了！！！！
非常有用！  解决了中文的乱码问题！！

3 楼 di1984HIT 2014-11-20  

不错，通过URL ENcode一下呗

2 楼 中国娃 2012-07-11  

多谢了，

1 楼 wqjqqtbb 2011-04-20  

多谢