HttpClient 请求 URL字符集转码问题

作者: 我的天呐
来源: 51数据库
2021-08-06

问题是这样的，我用eclipse发送httpclient请求如下没有问题，但是在idea中就返回400，为毛呢？？？excuse me?

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

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