HttpClient请求URL字符集转码问题解决方法

本篇文章小编给大家分享一下HttpClient请求URL字符集转码问题解决方法，文章代码介绍的很详细，小编觉得挺不错的，现在分享给大家供大家参考，有需要的小伙伴们可以来看看。

问题是这样的，用eclipse发送httpclient请求如下没有问题，但是在idea中就返回400，为什么？

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;
 
/**
 * 数据抽取测试类
 *
 * @author xbx
 *
 */
public class XBXmain {
  private final static String ENCODE = "utf-8";
 
  public static void main(String[] args) throws Exception {
		getDataA();
  }
 
 
  /*
   * Basic验证
   * 用户名：
   * 密钥：
   */
  public static void getDataA() throws Exception{
    HttpResponse httpResponse = null;
    HttpClient httpClient = new DefaultHttpClient();
    String projectName = "中科洛阳信息产业园项目(一期)";
    String url = "http://labour.ztjs.cn/clound/wsForThird/laboursByProjectName/"+projectName ;
    HttpGet get = new HttpGet(url);
    try {
 
      // 创建HttpClientBuilder
      HttpClientBuilder httpClientBuilder = HttpClientBuilder.create();
      // 设置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，在此处填写用户名和密码
      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 访问地址：http://labour.ztjs.cn/clound/wsForThird/laboursByProjectName/中科洛阳信息产业园项目(一期) 放在谷歌浏览器，然后再复制出来，发现汉字编码格式变了。ok，那就先转换下编码格式再发送请求。 修改后代码如下：

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;
 
/**
 * 数据抽取测试类
 *
 * @author xbx
 *
 */
public class XBXmain {
  private final static String ENCODE = "utf-8";
 
  public static void main(String[] args) throws Exception {
		getDataA();
  }
 
 
  /*
   * Basic验证
   * 用户名：
   * 密钥：
   */
  public static void getDataA() throws Exception{
    HttpResponse httpResponse = null;
    HttpClient httpClient = new DefaultHttpClient();
    String projectName = "中科洛阳信息产业园项目(一期)";
    String url = "http://labour.ztjs.cn/clound/wsForThird/laboursByProjectName/"+java.net.URLEncoder.encode(projectName, ENCODE);//URL 中文 转码
    HttpGet get = new HttpGet(url);
    try {
 
      // 创建HttpClientBuilder
      HttpClientBuilder httpClientBuilder = HttpClientBuilder.create();
      // 设置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，在此处填写用户名和密码
      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) {
    }
 
  }
 
}

再试试，请求成功，只需要转下编码：

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