网络通信：使用Java进行HTTP请求和响应解析

原创 Dear 丶 2024-12-08 08:48 8阅读 0赞

在Java中，我们可以使用各种库来发送HTTP请求并解析响应。这里以两个常用的库为例：Apache HttpClient和OkHttp。

1. 使用Apache HttpClient：

```java
import org.apache.http.HttpEntity;
import org.apache.http.client.methods.CloseableHttpResponse;
import org.apache.http.entity.StringEntity;

public class ApacheHttpClientExample {
    public static void main(String[] args) throws Exception {
        String url = "http://example.com/api/data";
        String requestString = "GET " + url + " HTTP/1.1";

CloseableHttpResponse response = HttpClientBuilder.create().execute(new HttpGet(requestString)));

if (response != null && response.getStatusLine() != null) {
            System.out.println("Response Status Code: " + response.getStatusLine().getStatusCode());
            HttpEntity entity = response.getEntity();
            if (entity != null) {
                System.out.println("Response Content: " + new String(entity.getContent()));
                entity.consumeContent();
            }
        }

// 关闭响应
        response.close();
    }
}
```

2. 使用OkHttp：

```java
import okhttp3.*;

public class OkHttpExample {
    public static void main(String[] args) throws Exception {
        OkHttpClient client = new OkHttpClient();

String url = "http://example.com/api/data";
        Request request = new Request.Builder()
                .url(url)
                .build();

Response response = client.newCall(request).execute();

if (response != null && response.body() != null) {
            System.out.println("Response Status Code: " + response.code());
            String responseBody = response.body().string();
            System.out.println("Response Content: " + responseBody);
        }

// 关闭响应
        response.close();
    }
}
```

这两个示例展示了如何使用Java的HttpClient和OkHttp库来发送HTTP请求并解析响应内容。