java怎么调用别的类的方法_java调用wsdl接口

java怎么调用别的类的方法_java调用wsdl接口在 Java 中调用第三方接口通常有以下几种方法 1 使用 Java 内置的 HttpURLConne 类 javaimport java io BufferedRead import java io InputStreamR import java net HttpURLConne import java net URL public class

在Java中调用第三方接口通常有以下几种方法:

1. 使用Java内置的`HttpURLConnection`类:

java

import java.io.BufferedReader;

import java.io.InputStreamReader;

import java.net.HttpURLConnection;

import java.net.URL;

public class HttpClient {

public static void main(String[] args) {

try {

URL url = new URL("http://example.com/api");

HttpURLConnection connection = (HttpURLConnection) url.openConnection();

connection.setRequestMethod("GET");

int statusCode = connection.getResponseCode();

BufferedReader in = new BufferedReader(new InputStreamReader(connection.getInputStream()));

String inputLine;

StringBuffer response = new StringBuffer();

while ((inputLine = in.readLine()) != null) {

response.append(inputLine);

}

in.close();

System.out.println(response.toString());

} catch (Exception e) {

e.printStackTrace();

}

}

}

2. 使用Apache HttpClient库:

首先,在项目的`pom.xml`文件中添加Apache HttpClient的依赖:

xml

org.apache.httpcomponents

httpclient

4.5.13

然后,创建一个方法来调用第三方接口:

java

import org.apache.http.HttpResponse;

import org.apache.http.client.HttpClient;

import org.apache.http.client.methods.HttpGet;

import org.apache.http.impl.client.HttpClients;

import org.apache.http.util.EntityUtils;

public class HttpClientExample {

public static void main(String[] args) {

HttpClient httpClient = HttpClients.createDefault();

HttpGet httpGet = new HttpGet("http://example.com/api");

try {

HttpResponse response = httpClient.execute(httpGet);

String result = EntityUtils.toString(response.getEntity());

System.out.println(result);

} catch (Exception e) {

e.printStackTrace();

}

}

}

3. 如果第三方接口提供了Java客户端库,可以直接使用该库调用接口,例如:

java

import com.example.ExternalInterface;

import com.example.ExternalInterfaceImpl;

public class ExternalInterfaceDemo {

public static void main(String[] args) {

ExternalInterface externalInterface = new ExternalInterfaceImpl();

externalInterface.method();

}

}

class ExternalInterfaceImpl implements ExternalInterface {

@Override

public void method() {

System.out.println("调用外部接口的方法");

}

}

请根据具体情况选择合适的方法,并注意处理可能出现的异常

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