Java 如何使用utf8字符正确读取url内容?
以及: 当我运行这个时,我得到:Java 如何使用utf8字符正确读取url内容?,java,url,encode,utf,Java,Url,Encode,Utf,以及: 当我运行这个时,我得到:{“句子”[{“trans”:“end”,“orig”:“koďż˝”;“translit”:“srcżtranslit”:“}],“src”:“pl”,“server_time”:30} 所以utf不能正常工作,但如果我返回编码的url:http://translate.google.com/translate_a/t?client=o&text=ko%C5%84&hl=en&sl=pl&tl=en并粘贴在url栏上,我得到正确的信息:{“句子”:[{“翻译”:
{“句子”[{“trans”:“end”,“orig”:“koďż˝”;“translit”:“srcżtranslit”:“}],“src”:“pl”,“server_time”:30}
所以utf不能正常工作,但如果我返回编码的url:http://translate.google.com/translate_a/t?client=o&text=ko%C5%84&hl=en&sl=pl&tl=en
并粘贴在url栏上,我得到正确的信息:{“句子”:[{“翻译”:“马”,“原语”:“kon”,“translit”:“,”src_translit”:“}],”dict:[{“pos”:“名词”,“术语”:[“马”]}],“src”:“pl”,“服务器时间”:76}
public class AbcServlet extends HttpServlet {
public void doGet(HttpServletRequest req, HttpServletResponse resp) throws IOException {
resp.setContentType("text/plain;charset=UTF-8");
resp.getWriter().println(new String(URLReader.read("pl", "en", "koń")));
}
}
为您提供UTF-8字节序列,因此URLReader.read也为您提供UTF-8字节序列
但是您尝试使用而不指定编码器进行解码,即新字符串(URLReader.read(“pl”、“en”、“kon”))
因此Java将使用您的系统默认编码进行解码(这不是UTF-8)
尝试:
更新
以下是我的机器上的完整工作代码:
new String(URLReader.read("pl", "en", "koń"), "UTF-8")
别忘了逃到\u0144。Java编译器可能无法正确编译Unicode文本,因此最好使用纯ASCII编写
public class URLReader {
public static byte[] read(String from, String to, String string) {
try {
String text = "http://translate.google.com/translate_a/t?"
+ "client=o&text=" + URLEncoder.encode(string, "UTF-8")
+ "&hl=en&sl=" + from + "&tl=" + to + "";
URL url = new URL(text);
URLConnection conn = url.openConnection();
// Look like faking the request coming from Web browser solve 403 error
conn.setRequestProperty("User-Agent", "Mozilla/5.0 (Windows; U; Windows NT 6.1; en-GB; rv:1.9.2.13) Gecko/20101203 Firefox/3.6.13 (.NET CLR 3.5.30729)");
BufferedReader in = new BufferedReader(new InputStreamReader(conn.getInputStream(), "UTF-8"));
String json = in.readLine();
byte[] bytes = json.getBytes("UTF-8");
in.close();
return bytes;
//return text.getBytes();
} catch (Exception e) {
System.out.println(e);
// becarful with returning null. subsequence call will return NullPointException.
return null;
}
}
}
hmm现在返回{“句子”:[{“trans”:“end”,“orig”:“ko”�","翻译“:”,“src_translit:”}],“src:“pl”,“server_time:”20}这是从您的web浏览器得到的吗?处理编码字节时不要使用PrinWriter。PrintWriter将使用不是UTF-8的JVM默认编码器。尝试getOutputStream.write((新字符串(URLReader.read(“pl”、“en”、“kon”)、“UTF-8”))。getBytes(“UTF-8”))注意设置resp.setContentType(“text/plain;charset=UTF-8”);不会真正告诉servlet使用UTF-8对其进行编码。只需通知目标web浏览器/客户端,您将发送一个用UTF-8编码的字节流。实际内容编码不需要与内容类型标头匹配。(当然你不想这样)我不需要写这个,我需要正确地将数据保存到数据库,但我看不到一个好方法来确定我尝试了你的代码,但我从谷歌服务器得到了403个错误。它不允许我使用它的翻译。
new String(URLReader.read("pl", "en", "koń"), "UTF-8")
public class URLReader {
public static byte[] read(String from, String to, String string) {
try {
String text = "http://translate.google.com/translate_a/t?"
+ "client=o&text=" + URLEncoder.encode(string, "UTF-8")
+ "&hl=en&sl=" + from + "&tl=" + to + "";
URL url = new URL(text);
URLConnection conn = url.openConnection();
// Look like faking the request coming from Web browser solve 403 error
conn.setRequestProperty("User-Agent", "Mozilla/5.0 (Windows; U; Windows NT 6.1; en-GB; rv:1.9.2.13) Gecko/20101203 Firefox/3.6.13 (.NET CLR 3.5.30729)");
BufferedReader in = new BufferedReader(new InputStreamReader(conn.getInputStream(), "UTF-8"));
String json = in.readLine();
byte[] bytes = json.getBytes("UTF-8");
in.close();
return bytes;
//return text.getBytes();
} catch (Exception e) {
System.out.println(e);
// becarful with returning null. subsequence call will return NullPointException.
return null;
}
}
}
public class AbcServlet extends HttpServlet {
@Override
public void doGet(HttpServletRequest req, HttpServletResponse resp) throws IOException {
resp.setContentType("text/plain;charset=UTF-8");
byte[] read = URLReader.read("pl", "en", "ko\u0144");
resp.getOutputStream().write(read) ;
}
}