HttpClient的Post请求和Get请求

虽然现在SOA、微服务盛行，但在咱们平常开发中少不了要用到HttpClient对第三方接口进行调用，这就要求咱们对最基本的使用有所了解，记录一下，以避免忘记。

Get请求

@Test
public void doGet(){
    CloseableHttpClient client = HttpClients.createDefault();
    HttpGet get = new HttpGet("http://www.baidu.com");
    CloseableHttpResponse response = client.excute(get);
    int code = response.getStatusLine().getStatusCode();
    System.Out.Print(code);
    HttpEntity entity = response.getEntity();
    String content = EntityUtils.toString(eneity,"UTF-8");
    System.Out.Print(content);
    response.close();
    client.close();
}
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带参数的Get请求

@Test
public void doGetAndParam(){
    //建立一个HttpClient对象
    CloseableHttpClient client = HttpClients.createDefault();
    //建立一个Uri对象
    URIBuilder builder = new URIBuilder("http://www.baidu.com");
    builder.addParameter("query","花千骨");
    HttpGet get = new HttpGet(builder.build());
    //执行请求
    CloseableHttpResponse response = client.excute(get);
    //状态码
    int code = response.getStatusLine().getStatusCode();
    HttpEntity entity = response.getEntity();
    String content = EntityUtils.toString(entity,"utf-8");
    System.out.print(content);
    response.close();
    client.close();
}
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Post请求

@Test
public void doPost(){
    //建立一个HttpClient对象
    CloseableHttpClient client = HttpClients.createDefault();
    HttpPost post = new HttpPost("http://localhost:8082/httpclient/post.action");
    CloseableResponse response = client.excute(post);
    int code = response.getStatusLine().getStatusCode();
    System.out.print(code);
    HttpEntity entity = resonse.getEntity();
    String content = EntityUtils.toString(entity,"utf-8");
    System.out.print(content);
    resonse.close();
    client.close();
}
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带参数的Pose请求

@Test
public void doPostAndParam(){
    //建立一个HttpClient对象
    CloseableHttpClient client = HttpClients.createDefault();
    //建立一个Post对象
    HttpPost post = new HttpPost("http://localhost:8082/httpclient/post.actionhttp://localhost:8082/httpclient/post.action");
    //建立一个entity模拟一个表单
    List<NameValuePair> list = new ArrayList<>();
    list.add(new BasicNameAndValuePair("name","UU"));
    list.add(new BasicNameAndValuePair("password","123"));
    //包装成一个entity对象
    StringEntity entity = new UrlEncodeFormEntity(list,"utf-8");
    //设置请求内容
    post.setEntity(entity);
    //执行请求内容
    CloseableResponse response = client.excute(post);
    int code = response.getStatusLine().getStatusCode();
    HttpEntity contentEntity = response.getEntity();
    String content = EntityUtils.toString(contentEntity);
    System.out.print(code);
    System.out.print(content);
    response.close();
    client.close();
}
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