标签：判断 处理 exce methods vat array 十年 create 的区别
前言：
网络API接口：https://api.apiopen.top/searchMusic
此API接口返回类型为JSON格式类型
GET：从指定资源请求数据
POST：向指定资源提交要被处理的数据
GET与POST的区别：
①GET在浏览器回退时是无害的，而POST会再次提交请求。
②GET只支持URL编码。
③GET参数通过URL传递，参数直接暴露在URL中会泄露信息，POST通过Request body传递不会有这样的问题。
④GET请求在URL中传递参数有长度限制，POST没有长度限制。
⑤对POST请求会险发送Header，服务器相应成功，在发送Date，服务器再次响应，需响应两次。GET会把Header与Date一起发送到服务端，服务器只响应一次。
一、POST方法
创建POST方法类
1 package com.HttpClient.Test; 2 3 import java.io.IOException; 4 import java.util.ArrayList; 5 6 import org.apache.http.HttpEntity; 7 import org.apache.http.HttpHost; 8 import org.apache.http.NameValuePair; 9 import org.apache.http.client.ClientProtocolException; 10 import org.apache.http.client.config.RequestConfig; 11 import org.apache.http.client.entity.UrlEncodedFormEntity; 12 import org.apache.http.client.methods.CloseableHttpResponse; 13 import org.apache.http.client.methods.HttpPost; 14 import org.apache.http.impl.client.CloseableHttpClient; 15 import org.apache.http.impl.client.HttpClientBuilder; 16 import org.apache.http.util.EntityUtils; 17 18 import com.HttpClient.jiexi.HttpClient_jiexi; 19 20 public class HttpClient_post { 21 22 private String entityStr; 23 HttpClient_jiexi JSONTOOL = new HttpClient_jiexi(); 24 25 //封装POST方法 26 public String post(String POST_URL,ArrayList<NameValuePair> list) { 27 28 try { 29 //把参数放入请求体中 30 UrlEncodedFormEntity entityParam = new UrlEncodedFormEntity(list, "UTF-8"); 31 CloseableHttpClient httpClient = HttpClientBuilder.create().build(); 32 HttpPost httpPost = new HttpPost(POST_URL); 33 httpPost.setEntity(entityParam); 34 //发起请求 35 CloseableHttpResponse response = httpClient.execute(httpPost); 36 //获取返回状态，并判断是否连接成功。 37 if (response.getStatusLine().getStatusCode()==200) { 38 System.out.println("连接成功"); 39 } else { 40 System.out.println("连接异常"); 41 } 42 // 获得响应的实体对象 43 HttpEntity entity = response.getEntity(); 44 45 //转换成字符串 46 entityStr = EntityUtils.toString(entity, "UTF-8"); 47 //关闭请求 48 httpClient.close(); 49 50 } catch (ClientProtocolException e) { 51 System.err.println("Http协议异常"); 52 e.printStackTrace(); 53 } catch (IOException e) { 54 System.err.println("IO异常"); 55 e.printStackTrace(); 56 } 57 return entityStr; 58 } 59 60 }
调用POST方法类
1 package com.HttpClient.Test; 2 3 import java.util.ArrayList; 4 import org.apache.http.NameValuePair; 5 import org.apache.http.message.BasicNameValuePair; 6 import org.json.JSONException; 7 import org.testng.annotations.Test; 8 9 public class HttpClient_case1 { 10 11 HttpClient_post post = new HttpClient_post(); 12 private String POST_URL = "https://api.apiopen.top/searchMusic"; 13 private String entity; 14 private ArrayList<NameValuePair> list; 15 16 @Test 17 public void test1() { 18 // 构造list集合，并添加参数 19 BasicNameValuePair basicNameValuePair = new BasicNameValuePair("name", "十年"); 20 list = new ArrayList<>(); 21 list.add(basicNameValuePair); 22 // 执行请求,需要传入URL与参数 23 entity = post.post(POST_URL,list); 24 System.out.println(entity); 25 } 26 27 }
二、SET方法
创建SET方法类
package com.HttpClient.Test; import java.io.IOException; import java.net.URISyntaxException; import java.util.ArrayList; import java.util.LinkedList; import java.util.List; import org.apache.http.HttpEntity; import org.apache.http.HttpHost; import org.apache.http.NameValuePair; import org.apache.http.client.ClientProtocolException; import org.apache.http.client.config.RequestConfig; 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.URIBuilder; import org.apache.http.impl.client.CloseableHttpClient; import org.apache.http.impl.client.HttpClientBuilder; import org.apache.http.impl.client.HttpClients; import org.apache.http.message.BasicNameValuePair; import org.apache.http.util.EntityUtils; public class HttpClient_set { public String entityStr ; public CloseableHttpResponse response ; public String set(String GET_URL,ArrayList<NameValuePair> list) throws URISyntaxException{try { CloseableHttpClient httpClient = HttpClients.createDefault(); URIBuilder uriBuilder = new URIBuilder(GET_URL); uriBuilder.setParameters(list); //根据带参数的URI对象构建GET请求对象 HttpGet httpGet = new HttpGet(uriBuilder.build()); //执行请求 response = httpClient.execute(httpGet); //获得响应的实体对象 HttpEntity entity = response.getEntity(); //转换成字符串 entityStr = EntityUtils.toString(entity, "UTF-8"); //关闭请求 httpClient.close(); } catch (ClientProtocolException e) { System.err.println("Http协议异常"); e.printStackTrace(); } catch (IOException e) { System.err.println("IO异常"); e.printStackTrace(); } return entityStr; } }
调用SET方法类
package com.HttpClient.Test; import java.net.URISyntaxException; import java.util.ArrayList; import org.apache.http.NameValuePair; import org.apache.http.message.BasicNameValuePair; import org.json.JSONException; import org.testng.annotations.Test; public class HttpClient_case1 { HttpClient_set set = new HttpClient_set(); private String SET_URL = "https://api.apiopen.top/searchMusic"; private String entity; private ArrayList<NameValuePair> list; @Test public void test1() throws URISyntaxException { // 构造list集合 BasicNameValuePair basicNameValuePair = new BasicNameValuePair("name", "十年"); list = new ArrayList<>(); list.add(basicNameValuePair); // 执行请求,需要传入URL与参数 entity = set.set(SET_URL, list); System.out.println(entity); } }
标签：判断 处理 exce methods vat array 十年 create 的区别
原文地址：https://www.cnblogs.com/yogouo/p/11949355.html
