httpclient模拟post请求json封装表单数据解决中文乱码问题

把原来的 ：httpPost.setEntity( new StringEntity(字符串.toString()));改为以下几行就完美解决：

StringEntity entity1 = new StringEntity(body.toString(),"utf-8");//解决中文乱码问题   
		entity1.setContentEncoding("UTF-8");   //解决中文乱码问题    
		entity1.setContentType("application/json"); //解决中文乱码问题   
		httpPost.setEntity(entity1);
		logger.info("请求地址："+url);

上代码。

import java.io.IOException;
import java.security.KeyManagementException;
import java.security.NoSuchAlgorithmException;
import java.security.cert.CertificateException;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Map.Entry;

import javax.net.ssl.SSLContext;
import javax.net.ssl.TrustManager;
import javax.net.ssl.X509TrustManager;

import org.apache.commons.lang.StringUtils;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.http.HttpEntity;
import org.apache.http.NameValuePair;
import org.apache.http.ParseException;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.CloseableHttpResponse;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.client.utils.URLEncodedUtils;
import org.apache.http.config.Registry;
import org.apache.http.config.RegistryBuilder;
import org.apache.http.conn.socket.ConnectionSocketFactory;
import org.apache.http.conn.socket.PlainConnectionSocketFactory;
import org.apache.http.conn.ssl.SSLConnectionSocketFactory;
import org.apache.http.entity.StringEntity;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.impl.conn.PoolingHttpClientConnectionManager;
import org.apache.http.message.BasicHeader;
import org.apache.http.message.BasicNameValuePair;
import org.apache.http.util.EntityUtils;

import com.css.eshop.model.Respones;
import com.css.eshop.model.TokenVo;
import com.google.gson.Gson;

public class HttpClientNoValidation {
	protected static Log logger = LogFactory.getLog(HttpClientUtil.class);
/**
	 * 模拟请求
	 * 
	 * @param url		资源地址
	 * @param map	参数列表
	 * @param encoding	编码
	 * @return
	 * @throws NoSuchAlgorithmException 
	 * @throws KeyManagementException 
	 * @throws IOException 
	 * @throws ClientProtocolException 
	 */
	public static Respones  sendJsonPost(String url, String body,String encoding) throws KeyManagementException, NoSuchAlgorithmException, ClientProtocolException, IOException {
		
		//采用绕过验证的方式处理https请求
		SSLContext sslcontext = createIgnoreVerifySSL();
		
        // 设置协议http和https对应的处理socket链接工厂的对象
        Registry socketFactoryRegistry = RegistryBuilder.create()
            .register("http", PlainConnectionSocketFactory.INSTANCE)
            .register("https", new SSLConnectionSocketFactory(sslcontext))
            .build();
        PoolingHttpClientConnectionManager connManager = new PoolingHttpClientConnectionManager(socketFactoryRegistry);
        HttpClients.custom().setConnectionManager(connManager);
 
        //创建自定义的httpclient对象
		CloseableHttpClient client = HttpClients.custom().setConnectionManager(connManager).build();
//		CloseableHttpClient client = HttpClients.createDefault();
		
		//创建post方式请求对象
		HttpPost httpPost = new HttpPost(url);
		
		//装填参数
		/*List nvps = new ArrayList();
		if(map!=null){
			for (Entry entry : map.entrySet()) {
				nvps.add(new BasicNameValuePair(entry.getKey(), entry.getValue()));
			}
		}
		//设置参数到请求对象中
		httpPost.setEntity(new UrlEncodedFormEntity(nvps, encoding));
		logger.info("请求参数："+nvps.toString());
		*/
		StringEntity entity1 = new StringEntity(body.toString(),"utf-8");//解决中文乱码问题   
		entity1.setContentEncoding("UTF-8");   //解决中文乱码问题    
		entity1.setContentType("application/json"); //解决中文乱码问题   
		httpPost.setEntity(entity1);
		logger.info("请求地址："+url);
		
		
		//设置header信息
		//指定报文头【Content-type】、【User-Agent】
		//httpPost.setHeader("User-Agent", "Mozilla/4.0 (compatible; MSIE 5.0; Windows NT; DigExt)");
		httpPost.setHeader("Content-type", "application/json;charset=UTF-8");
		
		Respones responseVo = new Respones();
		String strResult = "";
		CloseableHttpResponse response=null;
		try {
		//执行请求操作，并拿到结果（同步阻塞）
		 response = client.execute(httpPost);
		//获取结果实体
		HttpEntity entity = response.getEntity();
		if (entity != null) {
			//按指定编码转换结果实体为String类型
			strResult = EntityUtils.toString(entity, encoding);
		}
		logger.info("传入参数："+body);
		
		int iGetResultCode = response.getStatusLine().getStatusCode();
		
		responseVo.setResponeCde(iGetResultCode);
		responseVo.setResult(strResult);
		//EntityUtils.consume(entity);
		} catch (Exception ex) {
			responseVo.setResponeCde(500);
			responseVo.setResult("error");
			logger.error("executeGetMethod", ex);
		} finally {
			 try {
				if(response !=null){
					response.close();
				}
			} catch (Exception e) {
				logger.error("executeGetMethod", e);
			}
		}
		return responseVo;
	}
   /**
	 * 绕过验证
	 * 	
	 * @return
	 * @throws NoSuchAlgorithmException 
	 * @throws KeyManagementException 
	 */
	public static SSLContext createIgnoreVerifySSL() throws NoSuchAlgorithmException, KeyManagementException {
		SSLContext sc = SSLContext.getInstance("SSLv3");
 
		// 实现一个X509TrustManager接口，用于绕过验证，不用修改里面的方法
		X509TrustManager trustManager = new X509TrustManager() {
			@Override
			public void checkClientTrusted(
					java.security.cert.X509Certificate[] paramArrayOfX509Certificate,
					String paramString) throws CertificateException {
			}
 
			@Override
			public void checkServerTrusted(
					java.security.cert.X509Certificate[] paramArrayOfX509Certificate,
					String paramString) throws CertificateException {
			}
 
			@Override
			public java.security.cert.X509Certificate[] getAcceptedIssuers() {
				return null;
			}
		};
 
		sc.init(null, new TrustManager[] { trustManager }, null);
		return sc;
	}
}

 

通过传参，body里面可以是json数据，然后调用对方的接口。

再看看以下的参考代码：

public static String httpPostWithJSON(String url) throws Exception {

        HttpPost httpPost = new HttpPost(url);
        CloseableHttpClient client = HttpClients.createDefault();
        String respContent = null;
        
//        json方式
        JSONObject jsonParam = new JSONObject();  
        jsonParam.put("name", "admin");
        jsonParam.put("pass", "123456");
        StringEntity entity = new StringEntity(jsonParam.toString(),"utf-8");//解决中文乱码问题    
        entity.setContentEncoding("UTF-8");    
        entity.setContentType("application/json");    
        httpPost.setEntity(entity);
        System.out.println();
        
    
//        表单方式
//        List pairList = new ArrayList(); 
//        pairList.add(new BasicNameValuePair("name", "admin"));
//        pairList.add(new BasicNameValuePair("pass", "123456"));
//        httpPost.setEntity(new UrlEncodedFormEntity(pairList, "utf-8"));   
        
        
        HttpResponse resp = client.execute(httpPost);
        if(resp.getStatusLine().getStatusCode() == 200) {
            HttpEntity he = resp.getEntity();
            respContent = EntityUtils.toString(he,"UTF-8");
        }
        return respContent;
    }

    
    public static void main(String[] args) throws Exception {
        String result = httpPostWithJSON("http://localhost:8080/hcTest2/Hc");
        System.out.println(result);
    }

post方式 就要考虑提交的表单内容怎么传输了。本文name和pass就是表单的值了。

封装表单属性可以用json也可以用传统的表单，如果是传统表单的话 要注意，也就是在上边代码注释那部分。用这种方式的话在servlet里也就是数据处理层可以通过request.getParameter(”string“)直接获取到属性值。就是相比json这种要简单一点，不过在实际开发中一般都是用json做数据传输的。用json的话有两种选择一个是阿里巴巴的fastjson还有一个就是谷歌的gson。fastjson相比效率比较高，gson适合解析有规律的json数据。博主这里用的是fastjson。还有用json的话在数据处理层要用流来读取表单属性，这就是相比传统表单多的一点内容。代码下边已经有了。

public class HcServlet extends HttpServlet {
    private static final long serialVersionUID = 1L;
       
    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        doPost(request, response);
    }

    
    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        
        request.setCharacterEncoding("UTF-8");  
        response.setContentType("text/html;charset=UTF-8");  
        String acceptjson = "";  
        User user = new User();
        BufferedReader br = new BufferedReader(new InputStreamReader(  
                (ServletInputStream) request.getInputStream(), "utf-8"));  
        StringBuffer sb = new StringBuffer("");  
        String temp;  
        while ((temp = br.readLine()) != null) {  
            sb.append(temp);  
        }  
        br.close();  
        acceptjson = sb.toString();  
        if (acceptjson != "") {  
            JSONObject jo = JSONObject.parseObject(acceptjson);
            user.setUsername(jo.getString("name"));
            user.setPassword(jo.getString("pass"));
        }  
        
        request.setAttribute("user", user);
        request.getRequestDispatcher("/message.jsp").forward(request, response);
    }
}

参考文章：https://www.cnblogs.com/Vdiao/p/5339487.html