夜光 带你走进 Java基础编程实战（三十七 tcp/udp）

夜光序言：

人生的道路上总是充满意想不到的惊喜和阻碍，你可以丢弃很多累赘、流言、虚荣、那些不爱你的以及你不爱的人与回忆，但是无论何时，你不可以丢掉你的勇气~~

正文：通讯这一块很有趣~~我做AGV的时候，很多时候要设计通讯~~

import java.io.IOException;

import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.ResponseHandler;
import org.apache.http.client.config.RequestConfig;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.util.EntityUtils;

// 夜光：嘿哈~~第一个案例
public class HttpComponentsGetTest {

    public final static void main(String[] args) throws Exception {
    	
    	CloseableHttpClient httpClient = HttpClients.createDefault();
        RequestConfig requestConfig = RequestConfig.custom()
                .setConnectTimeout(5000)   //夜光 设置连接超时时间
                .setConnectionRequestTimeout(5000) // 夜光 设置请求超时时间
                .setSocketTimeout(5000)
                .setRedirectsEnabled(true)//夜光 默认允许自动重定向
                .build();
        
        HttpGet httpGet = new HttpGet("http://www.baidu.com");
        httpGet.setConfig(requestConfig);
        String srtResult = "";
        try {
            HttpResponse httpResponse = httpClient.execute(httpGet);
            if(httpResponse.getStatusLine().getStatusCode() == 200){
                srtResult = EntityUtils.toString(httpResponse.getEntity(), "UTF-8");//获得返回的结果                
                System.out.println(srtResult);
            }else
            {
                //夜光 异常处理
            }
        } catch (IOException e) {
            e.printStackTrace();
        }finally {
            try {
                httpClient.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }
}

import java.io.IOException;
import java.net.URLEncoder;
import java.util.ArrayList;
import java.util.List;

import org.apache.http.HttpResponse;
import org.apache.http.client.config.RequestConfig;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClientBuilder;
import org.apache.http.impl.client.LaxRedirectStrategy;
import org.apache.http.message.BasicNameValuePair;
import org.apache.http.util.EntityUtils;
//夜光：嘿哈~~第二个案例
public class HttpComponentsPostTest {

    public final static void main(String[] args) throws Exception {
    	
    	//夜光 获取可关闭的 httpCilent
        //CloseableHttpClient httpClient = HttpClients.createDefault();
    	CloseableHttpClient httpClient = HttpClientBuilder.create().setRedirectStrategy(new LaxRedirectStrategy()).build();
    	//夜光 配置超时时间
        RequestConfig requestConfig = RequestConfig.custom().
                setConnectTimeout(10000).setConnectionRequestTimeout(10000)
                .setSocketTimeout(10000).setRedirectsEnabled(false).build();
         
        HttpPost httpPost = new HttpPost("https://tools.usps.com/go/ZipLookupAction.action");
        //夜光 设置超时时间
        httpPost.setConfig(requestConfig);
        
        //夜光 装配post请求参数
        List<BasicNameValuePair> list = new ArrayList<BasicNameValuePair>(); 
        list.add(new BasicNameValuePair("tAddress", URLEncoder.encode("1 Market Street", "UTF-8")));  //请求参数
        list.add(new BasicNameValuePair("tCity", URLEncoder.encode("San Francisco", "UTF-8"))); //请求参数
        list.add(new BasicNameValuePair("sState", "CA")); //请求参数
        try {
            UrlEncodedFormEntity entity = new UrlEncodedFormEntity(list,"UTF-8"); 
            //夜光 设置post求情参数
            httpPost.setEntity(entity);
            httpPost.setHeader("User-Agent", "HTTPie/0.9.2");
            //夜光 httpPost.setHeader("Content-Type","application/form-data");
            HttpResponse httpResponse = httpClient.execute(httpPost);
            String strResult = "";
            if(httpResponse != null){ 
                System.out.println(httpResponse.getStatusLine().getStatusCode());
                if (httpResponse.getStatusLine().getStatusCode() == 200) {
                    strResult = EntityUtils.toString(httpResponse.getEntity());
                }
                else {
                    strResult = "Error Response: " + httpResponse.getStatusLine().toString();
                } 
            }else{
                 
            }
            System.out.println(strResult);
        } catch (Exception e) {
            e.printStackTrace();
        }finally {
            try {
                if(httpClient != null){
                    httpClient.close(); //夜光 释放资源
                }
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }
}