上篇文章给大家介绍了HttpClient详细使用示例详解,喜欢的朋友可以点击查看,今天继续给大家介绍HttpClient用法,具体内容如下所示;
HttpClient是Apache Jakarta Common下的子项目,用来提供高效的、最新的、功能丰富的支持HTTP协议的客户端编程工具包,并且它支持HTTP协议最新的版本和建议。HttpClient已经应用在很多的项目中,比如Apache Jakarta上很著名的另外两个开源项目Cactus和HTMLUnit都使用了HttpClient。
HttpClient相比传统JDK自带的URLConnection,增加了易用性和灵活性,它不仅使客户端发送Http请求变得容易,而且也方便开发人员测试接口(基于Http协议的),提高了开发的效率,也方便提高代码的健壮性。
<?xml version="1.0" encoding="UTF-8"?> <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"> <modelVersion>4.0.0</modelVersion> <groupId>com.wo</groupId> <artifactId>HttpClient_test</artifactId> <version>1.0-SNAPSHOT</version> <parent> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-parent</artifactId> <version>2.0.3.RELEASE</version> <relativePath/> <!-- lookup parent from repository --> </parent> <dependencies> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> </dependency> <dependency> <groupId>org.apache.httpcomponents</groupId> <artifactId>httpclient</artifactId> <version>4.5.5</version> </dependency> <dependency> <groupId>com.alibaba</groupId> <artifactId>fastjson</artifactId> <version>1.2.47</version> </dependency> </dependencies> </project>
@RequestMapping("findAll") public String findAll() throws Exception{ //获得Http客户端 CloseableHttpClient build = HttpClientBuilder.create().build(); //创建get请求 HttpGet httpGet = new HttpGet("http://localhost:8088/lunbo/findAll"); //执行请求 CloseableHttpResponse execute = build.execute(httpGet); //解析返回值 StatusLine statusLine = execute.getStatusLine(); //获取到返回状态码 System.out.println("状态码为:"+statusLine.getStatusCode()); String s = EntityUtils.toString(execute.getEntity()); build.close(); execute.close(); return s; }
//post路径传参 @RequestMapping("/findAllPost/{page}/{size}") public String findAll(@PathVariable("page") int page,@PathVariable("size") int size) throws Exception { //获得Http客户端 CloseableHttpClient build = HttpClientBuilder.create().build(); //创建post请求 HttpPost httpPost = new HttpPost("http://localhost:8088/position/findAll/"+page+"/"+size); //执行请求 CloseableHttpResponse execute = build.execute(httpPost); //解析返回值 StatusLine statusLine = execute.getStatusLine(); //获取到返回状态码 System.out.println("状态码为:"+statusLine.getStatusCode()); String s = EntityUtils.toString(execute.getEntity()); build.close(); execute.close(); return s; } //post map传参 @RequestMapping("findById") public String findById(@RequestParam("id") Integer id)throws Exception{ //创建httpclicent请求对象 CloseableHttpClient build = HttpClientBuilder.create().build(); //声明请求方式 HttpPost httpPost = new HttpPost("http://localhost:8088/position/findById"); //声明携带参数 Map map=new HashMap<>(); map.put("id",id); //将map转换为json格式 Object o = JSONObject.toJSON(map); //设置请求 参数的编码格式 StringEntity stringEntity = new StringEntity(o.toString(), "utf-8"); //将参数设置到请求对象中 httpPost.setEntity(stringEntity); //设置content-Type httpPost.setHeader("Content-Type","application/json"); //执行请求 CloseableHttpResponse execute = build.execute(httpPost); //解析返回值 StatusLine statusLine = execute.getStatusLine(); //获取到返回状态码 System.out.println("状态码为:"+statusLine.getStatusCode()); String s = EntityUtils.toString(execute.getEntity()); build.close(); execute.close(); return s; }
到此这篇关于详解HttpClient用法的文章就介绍到这了,更多相关HttpClient用法内容请搜索呐喊教程以前的文章或继续浏览下面的相关文章希望大家以后多多支持呐喊教程!
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