怎么對HttpClient請求的URL進行字符集轉碼

怎么對HttpClient請求的URL進行字符集轉碼？很多新手對此不是很清楚，為了幫助大家解決這個難題，下面小編將為大家詳細講解，有這方面需求的人可以來學習下，希望你能有所收獲。

package com.vol.timingTasks;
 
 
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.auth.AuthScope;
import org.apache.http.auth.UsernamePasswordCredentials;
import org.apache.http.client.CredentialsProvider;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.BasicCredentialsProvider;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.impl.client.HttpClientBuilder;
import org.apache.http.util.EntityUtils;
 
import java.io.IOException;
 
/**
 * 數據抽取測試類
 *
 * @author xbx
 *
 */
public class XBXmain {
  private final static String ENCODE = "utf-8";
 
  public static void main(String[] args) throws Exception {
		getDataA();
  }
 
 
  /*
   * Basic驗證
   * 用戶名：
   * 密鑰：
   */
  public static void getDataA() throws Exception{
    HttpResponse httpResponse = null;
    HttpClient httpClient = new DefaultHttpClient();
    String projectName = "中科洛陽信息產業園項目(一期)";
    String url = "http://labour.ztjs.cn/clound/wsForThird/laboursByProjectName/"+projectName ;
    HttpGet get = new HttpGet(url);
    try {
 
      // 創建HttpClientBuilder
      HttpClientBuilder httpClientBuilder = HttpClientBuilder.create();
      // 設置BasicAuth
      CredentialsProvider provider = new BasicCredentialsProvider();
      // Create the authentication scope
      AuthScope scope = new AuthScope(AuthScope.ANY_HOST, AuthScope.ANY_PORT, AuthScope.ANY_REALM);
      // Create credential pair，在此處填寫用戶名和密碼
      UsernamePasswordCredentials credentials = new UsernamePasswordCredentials("", "");
      // Inject the credentials
      provider.setCredentials(scope, credentials);
      // Set the default credentials provider
      httpClientBuilder.setDefaultCredentialsProvider(provider);
      // HttpClient
      CloseableHttpClient closeableHttpClient = httpClientBuilder.build();
 
 
      httpResponse = closeableHttpClient.execute(get);
      HttpEntity httpEntity = httpResponse.getEntity();
      String httpResult = EntityUtils.toString(httpEntity);
      String httpResult2 = EntityUtils.toString(httpEntity);
    } catch (IOException e) {
    }
 
  }
 
}

把 訪問地址：http://labour.ztjs.cn/clound/wsForThird/laboursByProjectName/中科洛陽信息產業園項目(一期) 放在谷歌瀏覽器，然后再復制出來，發現漢字編碼格式變了。ok，那就先轉換下編碼格式再發送請求。  修改后代碼如下：

package com.vol.timingTasks;
 
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.auth.AuthScope;
import org.apache.http.auth.UsernamePasswordCredentials;
import org.apache.http.client.CredentialsProvider;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.BasicCredentialsProvider;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.impl.client.HttpClientBuilder;
import org.apache.http.util.EntityUtils;
 
import java.io.IOException;
 
/**
 * 數據抽取測試類
 *
 * @author xbx
 *
 */
public class XBXmain {
  private final static String ENCODE = "utf-8";
 
  public static void main(String[] args) throws Exception {
		getDataA();
  }
 
 
  /*
   * Basic驗證
   * 用戶名：
   * 密鑰：
   */
  public static void getDataA() throws Exception{
    HttpResponse httpResponse = null;
    HttpClient httpClient = new DefaultHttpClient();
    String projectName = "中科洛陽信息產業園項目(一期)";
    String url = "http://labour.ztjs.cn/clound/wsForThird/laboursByProjectName/"+java.net.URLEncoder.encode(projectName, ENCODE);//URL 中文 轉碼
    HttpGet get = new HttpGet(url);
    try {
 
      // 創建HttpClientBuilder
      HttpClientBuilder httpClientBuilder = HttpClientBuilder.create();
      // 設置BasicAuth
      CredentialsProvider provider = new BasicCredentialsProvider();
      // Create the authentication scope
      AuthScope scope = new AuthScope(AuthScope.ANY_HOST, AuthScope.ANY_PORT, AuthScope.ANY_REALM);
      // Create credential pair，在此處填寫用戶名和密碼
      UsernamePasswordCredentials credentials = new UsernamePasswordCredentials("", "");
      // Inject the credentials
      provider.setCredentials(scope, credentials);
      // Set the default credentials provider
      httpClientBuilder.setDefaultCredentialsProvider(provider);
      // HttpClient
      CloseableHttpClient closeableHttpClient = httpClientBuilder.build();
 
      httpResponse = closeableHttpClient.execute(get);
      HttpEntity httpEntity = httpResponse.getEntity();
      String httpResult = EntityUtils.toString(httpEntity);
      String httpResult2 = EntityUtils.toString(httpEntity);
    } catch (IOException e) {
    }
 
  }
 
}

再試試，請求成功，只需要轉下編碼：

String url = "http://labour.ztjs.cn/clound/wsForThird/laboursByProjectName/"+java.net.URLEncoder.encode(projectName, ENCODE);//URL  中文 轉碼

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