みんな: データを取得するためにhttpRequest を作成しようとしましたが、応答に漢字が含まれているときに何か問題があります。このコードをテストするとうまくいきます!しかし、このコードを使用してデータを要求するプロジェクトを開始すると、問題が発生しました...(下のsystem.outから、漢字が間違っていることがわかります)書き込みエンコーディングに変換できない理由がわかりません。(/ test code. /) を static main メソッドにコピーして実行すると、問題ないようですよね？私のコンピューター環境：win7、project、およびtomcatはすべてutf-8を使用し、リクエストとレスポンスのエンコーディングも両方ともutf-8です。これが私のコードです：
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;
import java.nio.charset.Charset;
import java.util.Map;
import java.util.Vector;
public class HttpRequestUtil {
private String defaultContentEncoding;
public HttpRequestUtil() {
this.defaultContentEncoding = Charset.defaultCharset().name();
}
public HttpRequestUtil(String encoding) {
this.defaultContentEncoding = encoding;
}
/**
* 发送GET请求
*
* @param urlString
* URL地址
* @return 响应对象
* @throws IOException
*/
public HttpResponsUtil sendGet(String urlString) throws IOException {
return this.send(urlString, "GET", null, null);
}
/**
* 发送GET请求
*
* @param urlString
* URL地址
* @param params
* 参数集合
* @return 响应对象
* @throws IOException
*/
public HttpResponsUtil sendGet(String urlString, Map<String, String> params)
throws IOException {
return this.send(urlString, "GET", params, null);
}
/**
* 发送GET请求
*
* @param urlString
* URL地址
* @param params
* 参数集合
* @param propertys
* 请求属性
* @return 响应对象
* @throws IOException
*/
public HttpResponsUtil sendGet(String urlString, Map<String, String> params,
Map<String, String> propertys) throws IOException {
return this.send(urlString, "GET", params, propertys);
}
/**
* 发送POST请求
*
* @param urlString
* URL地址
* @return 响应对象
* @throws IOException
*/
public HttpResponsUtil sendPost(String urlString) throws IOException {
return this.send(urlString, "POST", null, null);
}
/**
* 发送POST请求
*
* @param urlString
* URL地址
* @param params
* 参数集合
* @return 响应对象
* @throws IOException
*/
public HttpResponsUtil sendPost(String urlString, Map<String, String> params)
throws IOException {
return this.send(urlString, "POST", params, null);
}
/**
* 发送POST请求
*
* @param urlString
* URL地址
* @param params
* 参数集合
* @param propertys
* 请求属性
* @return 响应对象
* @throws IOException
*/
public HttpResponsUtil sendPost(String urlString, Map<String, String> params,
Map<String, String> propertys) throws IOException {
return this.send(urlString, "POST", params, propertys);
}
/**
* 发送HTTP请求
*
* @param urlString
* @return 响映对象
* @throws IOException
*/
private HttpResponsUtil send(String urlString, String method,
Map<String, String> parameters, Map<String, String> propertys)
throws IOException {
HttpURLConnection urlConnection = null;
if (method.equalsIgnoreCase("GET") && parameters != null) {
StringBuffer param = new StringBuffer();
int i = 0;
for (String key : parameters.keySet()) {
if (i == 0)
param.append("?");
else
param.append("&");
param.append(key).append("=").append(parameters.get(key));
i++;
}
urlString += param;
}
URL url = new URL(urlString);
urlConnection = (HttpURLConnection) url.openConnection();
urlConnection.setRequestMethod(method);
urlConnection.setDoOutput(true);
urlConnection.setDoInput(true);
urlConnection.setUseCaches(false);
if (propertys != null)
for (String key : propertys.keySet()) {
urlConnection.addRequestProperty(key, propertys.get(key));
}
if (method.equalsIgnoreCase("POST") && parameters != null) {
StringBuffer param = new StringBuffer();
for (String key : parameters.keySet()) {
param.append("&");
param.append(key).append("=").append(parameters.get(key));
}
urlConnection.getOutputStream().write(param.toString().getBytes());
urlConnection.getOutputStream().flush();
urlConnection.getOutputStream().close();
}
return this.makeContent(urlString, urlConnection);
}
/**
* 得到响应对象
*
* @param urlConnection
* @return 响应对象
* @throws IOException
*/
private HttpResponsUtil makeContent(String urlString,
HttpURLConnection urlConnection) throws IOException {
HttpResponsUtil httpResponser = new HttpResponsUtil();
try {
InputStream in = urlConnection.getInputStream();
//这里如果不指定InputStreamReader的编码，当中文字符超过两个时就会出现乱码（utf8情况下）
BufferedReader bufferedReader = new BufferedReader(
new InputStreamReader(in, this.defaultContentEncoding));
httpResponser.contentCollection = new Vector<String>();
StringBuffer temp = new StringBuffer();
String line = bufferedReader.readLine();
while (line != null) {
httpResponser.contentCollection.add(line);
temp.append(line); //.append("\r\n")
line = bufferedReader.readLine();
}
bufferedReader.close();
String ecod = urlConnection.getContentEncoding();
if (ecod == null){
ecod = this.defaultContentEncoding;
httpResponser.content = temp.toString();
/*test code.*/
System.out.println("ecod is" + ecod);
//ecod isUTF-8
System.out.println("temp = " + temp.toString());
//temp = {"tags":[{"r_id":3553740735078269,"tag":"再测试"},{"r_id":3555331928010955,"tag":"再测试"},{"r_id":3555332033148401,"tag":"再测试,测试好多个字符串"}],"rids":"3555332033148401,3555331928010955,3553740735078269,3553509628288136,3552801450193593,3550638895838037,3550607615227068,3550334377352366,3550333965816322,3550315184067715,3550136490112256,3550098295918936,3550094449884887,3550094122996559,3550092986220398,3550090717120421,3550090532251655,3550089362475695,3549897523877864,3549756045751486,3549719639064459,3549564726035910,3549379539997223,3549377979585685,3549373109656624","idArr":["3555332033148401","3555331928010955","3553740735078269","3553509628288136","3552801450193593","3550638895838037","3550607615227068","3550334377352366","3550333965816322","3550315184067715","3550136490112256","3550098295918936","3550094449884887","3550094122996559","3550092986220398","3550090717120421","3550090532251655","3550089362475695","3549897523877864","3549756045751486","3549719639064459","3549564726035910","3549379539997223","3549377979585685","3549373109656624"],"uId":1916364215,"type":3}
System.out.println("temp after encode: "+new String(temp.toString().getBytes(), ecod));
//temp after encode: {"tags":[{"r_id":3553740735078269,"tag":"?????"},{"r_id":3555331928010955,"tag":"?????"},{"r_id":3555332033148401,"tag":"?????,??????????"}],"rids":"3555332033148401,3555331928010955,3553740735078269,3553509628288136,3552801450193593,3550638895838037,3550607615227068,3550334377352366,3550333965816322,3550315184067715,3550136490112256,3550098295918936,3550094449884887,3550094122996559,3550092986220398,3550090717120421,3550090532251655,3550089362475695,3549897523877864,3549756045751486,3549719639064459,3549564726035910,3549379539997223,3549377979585685,3549373109656624","idArr":["3555332033148401","3555331928010955","3553740735078269","3553509628288136","3552801450193593","3550638895838037","3550607615227068","3550334377352366","3550333965816322","3550315184067715","3550136490112256","3550098295918936","3550094449884887","3550094122996559","3550092986220398","3550090717120421","3550090532251655","3550089362475695","3549897523877864","3549756045751486","3549719639064459","3549564726035910","3549379539997223","3549377979585685","3549373109656624"],"uId":1916364215,"type":3}
String str = "{\"tags\":[{\"r_id\":3553740735078269,\"tag\":\"再测试\"},{\"r_id\":3555331928010955,\"tag\":\"再测试\"},{\"r_id\":3555332033148401,\"tag\":\"再测试,测试好多个字符串\"}],\"rids\":\"3555332033148401,3555331928010955,3553740735078269,3553509628288136,3552801450193593,3550638895838037,3550607615227068,3550334377352366,3550333965816322,3550315184067715,3550136490112256,3550098295918936,3550094449884887,3550094122996559,3550092986220398,3550090717120421,3550090532251655,3550089362475695,3549897523877864,3549756045751486,3549719639064459,3549564726035910,3549379539997223,3549377979585685,3549373109656624\",\"idArr\":[\"3555332033148401\",\"3555331928010955\",\"3553740735078269\",\"3553509628288136\",\"3552801450193593\",\"3550638895838037\",\"3550607615227068\",\"3550334377352366\",\"3550333965816322\",\"3550315184067715\",\"3550136490112256\",\"3550098295918936\",\"3550094449884887\",\"3550094122996559\",\"3550092986220398\",\"3550090717120421\",\"3550090532251655\",\"3550089362475695\",\"3549897523877864\",\"3549756045751486\",\"3549719639064459\",\"3549564726035910\",\"3549379539997223\",\"3549377979585685\",\"3549373109656624\"],\"uId\":1916364215,\"type\":3}";
System.out.println("compare two string:" + temp.toString().equals(str));
//compare two string:true
StringBuffer sb = new StringBuffer();
sb.append(str);
String s = new String(sb.toString().getBytes(), "UTF-8");
System.out.println("s test:" + s);
//s test:{"tags":[{"r_id":3553740735078269,"tag":"?????"},{"r_id":3555331928010955,"tag":"?????"},{"r_id":3555332033148401,"tag":"?????,??????????"}],"rids":"3555332033148401,3555331928010955,3553740735078269,3553509628288136,3552801450193593,3550638895838037,3550607615227068,3550334377352366,3550333965816322,3550315184067715,3550136490112256,3550098295918936,3550094449884887,3550094122996559,3550092986220398,3550090717120421,3550090532251655,3550089362475695,3549897523877864,3549756045751486,3549719639064459,3549564726035910,3549379539997223,3549377979585685,3549373109656624","idArr":["3555332033148401","3555331928010955","3553740735078269","3553509628288136","3552801450193593","3550638895838037","3550607615227068","3550334377352366","3550333965816322","3550315184067715","3550136490112256","3550098295918936","3550094449884887","3550094122996559","3550092986220398","3550090717120421","3550090532251655","3550089362475695","3549897523877864","3549756045751486","3549719639064459","3549564726035910","3549379539997223","3549377979585685","3549373109656624"],"uId":1916364215,"type":3}
/*test code.*/
} else{
httpResponser.content = new String(temp.toString().getBytes(), ecod);
}
httpResponser.urlString = urlString;
httpResponser.defaultPort = urlConnection.getURL().getDefaultPort();
httpResponser.file = urlConnection.getURL().getFile();
httpResponser.host = urlConnection.getURL().getHost();
httpResponser.path = urlConnection.getURL().getPath();
httpResponser.port = urlConnection.getURL().getPort();
httpResponser.protocol = urlConnection.getURL().getProtocol();
httpResponser.query = urlConnection.getURL().getQuery();
httpResponser.ref = urlConnection.getURL().getRef();
httpResponser.userInfo = urlConnection.getURL().getUserInfo();
httpResponser.contentEncoding = ecod;
httpResponser.code = urlConnection.getResponseCode();
httpResponser.message = urlConnection.getResponseMessage();
httpResponser.contentType = urlConnection.getContentType();
httpResponser.method = urlConnection.getRequestMethod();
httpResponser.connectTimeout = urlConnection.getConnectTimeout();
httpResponser.readTimeout = urlConnection.getReadTimeout();
return httpResponser;
} catch (IOException e) {
throw e;
} finally {
if (urlConnection != null)
urlConnection.disconnect();
}
}
/**
* 默认的响应字符集
*/
public String getDefaultContentEncoding() {
return this.defaultContentEncoding;
}
/**
* 设置默认的响应字符集
*/
public void setDefaultContentEncoding(String defaultContentEncoding) {
this.defaultContentEncoding = defaultContentEncoding;
}
public static void main(String[] args) throws Exception {
String str = "{\"tags\":[{\"r_id\":3553740735078269,\"tag\":\"再测试\"},{\"r_id\":3555331928010955,\"tag\":\"再测试\"},{\"r_id\":3555332033148401,\"tag\":\"再测试,测试好多个字符串\"}],\"rids\":\"3555332033148401,3555331928010955,3553740735078269,3553509628288136,3552801450193593,3550638895838037,3550607615227068,3550334377352366,3550333965816322,3550315184067715,3550136490112256,3550098295918936,3550094449884887,3550094122996559,3550092986220398,3550090717120421,3550090532251655,3550089362475695,3549897523877864,3549756045751486,3549719639064459,3549564726035910,3549379539997223,3549377979585685,3549373109656624\",\"idArr\":[\"3555332033148401\",\"3555331928010955\",\"3553740735078269\",\"3553509628288136\",\"3552801450193593\",\"3550638895838037\",\"3550607615227068\",\"3550334377352366\",\"3550333965816322\",\"3550315184067715\",\"3550136490112256\",\"3550098295918936\",\"3550094449884887\",\"3550094122996559\",\"3550092986220398\",\"3550090717120421\",\"3550090532251655\",\"3550089362475695\",\"3549897523877864\",\"3549756045751486\",\"3549719639064459\",\"3549564726035910\",\"3549379539997223\",\"3549377979585685\",\"3549373109656624\"],\"uId\":1916364215,\"type\":3}";
StringBuffer sb = new StringBuffer();
sb.append(str);
String s = new String(sb.toString().getBytes(), "UTF-8");
System.out.println("s test:" + s);
//s test:{"tags":[{"r_id":3553740735078269,"tag":"再测试"},{"r_id":3555331928010955,"tag":"再测试"},{"r_id":3555332033148401,"tag":"再测试,测试好多个字符串"}],"rids":"3555332033148401,3555331928010955,3553740735078269,3553509628288136,3552801450193593,3550638895838037,3550607615227068,3550334377352366,3550333965816322,3550315184067715,3550136490112256,3550098295918936,3550094449884887,3550094122996559,3550092986220398,3550090717120421,3550090532251655,3550089362475695,3549897523877864,3549756045751486,3549719639064459,3549564726035910,3549379539997223,3549377979585685,3549373109656624","idArr":["3555332033148401","3555331928010955","3553740735078269","3553509628288136","3552801450193593","3550638895838037","3550607615227068","3550334377352366","3550333965816322","3550315184067715","3550136490112256","3550098295918936","3550094449884887","3550094122996559","3550092986220398","3550090717120421","3550090532251655","3550089362475695","3549897523877864","3549756045751486","3549719639064459","3549564726035910","3549379539997223","3549377979585685","3549373109656624"],"uId":1916364215,"type":3}
}
}