Java中使用HttpPost发送form格式的请求实现代码

import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.NameValuePair;
import org.apache.http.client.HttpClient;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.message.BasicNameValuePair;
import org.apache.http.util.EntityUtils;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
public class HttpClientExample {
    public static void main(String[] args) {
        HttpClient httpClient = HttpClients.createDefault();
        HttpPost httpPost = new HttpPost("http://example.com/api");
        // 添加请求参数
        List<NameValuePair> params = new ArrayList<>();
        params.add(new BasicNameValuePair("username", "exampleUser"));
        params.add(new BasicNameValuePair("password", "examplePassword"));
        try {
            httpPost.setEntity(new UrlEncodedFormEntity(params));
            HttpResponse response = httpClient.execute(httpPost);
            HttpEntity entity = response.getEntity();
            String responseString = EntityUtils.toString(entity);
            System.out.println("Response: " + responseString);
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}