Java中以字符串调用SOAP Web服务的最简实现及JUnit测试方案

Got it，这种不想折腾生成一堆SOAP客户端类、只想快速用现有SoapUI请求验证服务的需求，我太懂了！下面给你两种超简便的实现方式，完全满足你要的「快速搭JUnit测试、直接用XML调用」的要求：

方法一：用Java原生HttpURLConnection（无额外依赖） #

这种方式不需要引入任何第三方库，纯原生Java就能搞定，适合快速验证。核心就是把你从SoapUI拿到的URL和SOAP信封，直接通过POST请求发出去：

步骤&代码示例 #

import org.junit.Test;
import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.net.HttpURLConnection;
import java.net.URL;

public class SoapIntegrationTest {

    @Test
    public void testSoapService() throws Exception {
        // 替换成你从SoapUI复制的服务端点URL
        String soapServiceUrl = "https://your-target-soap-service.com/endpoint";
        // 替换成你从SoapUI导出的完整SOAP信封（Java 15+支持文本块，低版本请转义双引号）
        String soapEnvelope = """
            <soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/" xmlns:demo="http://demo.service.com/">
               <soapenv:Header/>
               <soapenv:Body>
                  <demo:GetUserInfo>
                     <demo:userId>12345</demo:userId>
                  </demo:GetUserInfo>
               </soapenv:Body>
            </soapenv:Envelope>
            """;

        // 建立HTTP连接
        URL url = new URL(soapServiceUrl);
        HttpURLConnection connection = (HttpURLConnection) url.openConnection();
        connection.setRequestMethod("POST");
        
        // 设置SOAP服务要求的请求头
        connection.setRequestProperty("Content-Type", "text/xml;charset=UTF-8");
        // 注意：SOAPAction头要从SoapUI的请求头里复制，很多服务依赖它识别操作；如果没有就注释掉
        connection.setRequestProperty("SOAPAction", "http://demo.service.com/GetUserInfo");

        // 允许写入请求体
        connection.setDoOutput(true);
        try (OutputStream outputStream = connection.getOutputStream()) {
            outputStream.write(soapEnvelope.getBytes("UTF-8"));
            outputStream.flush();
        }

        // 读取并打印响应
        try (BufferedReader reader = new BufferedReader(new InputStreamReader(connection.getInputStream(), "UTF-8"))) {
            StringBuilder responseBuilder = new StringBuilder();
            String line;
            while ((line = reader.readLine()) != null) {
                responseBuilder.append(line);
            }
            String soapResponse = responseBuilder.toString();
            System.out.println("SOAP服务响应：\n" + soapResponse);
            
            // 这里可以加断言验证响应，比如检查是否包含预期结果
            // assert soapResponse.contains("<demo:userName>JohnDoe</demo:userName>");
        } finally {
            connection.disconnect();
        }
    }
}

注意事项 #

• 如果你的Java版本低于15，把SOAP信封的文本块换成常规字符串，记得把双引号转义成\"
• SOAPAction头非常关键：如果SoapUI的请求里有这个头，一定要原样复制；如果没有，直接删除这个请求头设置即可

方法二：用Apache HttpClient（更简洁的流处理） #

如果你的项目已经引入了Apache HttpClient，或者觉得原生API写起来繁琐，用这个更省心。它帮你封装了很多流处理和连接管理的细节：

先加Maven依赖（测试范围） #

<dependency>
    <groupId>org.apache.httpcomponents</groupId>
    <artifactId>httpclient</artifactId>
    <version>4.5.14</version> <!-- 可以用最新稳定版 -->
    <scope>test</scope>
</dependency>

JUnit测试代码 #

import org.apache.http.HttpEntity;
import org.apache.http.client.methods.CloseableHttpResponse;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.entity.StringEntity;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.util.EntityUtils;
import org.junit.Test;

public class SoapHttpClientTest {

    @Test
    public void testSoapServiceWithHttpClient() throws Exception {
        String soapServiceUrl = "https://your-target-soap-service.com/endpoint";
        String soapEnvelope = """
            <soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/" xmlns:demo="http://demo.service.com/">
               <soapenv:Header/>
               <soapenv:Body>
                  <demo:GetUserInfo>
                     <demo:userId>12345</demo:userId>
                  </demo:GetUserInfo>
               </soapenv:Body>
            </soapenv:Envelope>
            """;

        try (CloseableHttpClient httpClient = HttpClients.createDefault()) {
            HttpPost postRequest = new HttpPost(soapServiceUrl);
            
            // 设置请求头
            postRequest.setHeader("Content-Type", "text/xml;charset=UTF-8");
            postRequest.setHeader("SOAPAction", "http://demo.service.com/GetUserInfo");

            // 设置请求体
            StringEntity requestEntity = new StringEntity(soapEnvelope, "UTF-8");
            postRequest.setEntity(requestEntity);

            // 发送请求并获取响应
            try (CloseableHttpResponse response = httpClient.execute(postRequest)) {
                HttpEntity responseEntity = response.getEntity();
                String soapResponse = EntityUtils.toString(responseEntity, "UTF-8");
                System.out.println("SOAP服务响应：\n" + soapResponse);
                
                // 断言验证逻辑
                // assert soapResponse.contains("<demo:success>true</demo:success>");
            }
        }
    }
}

核心优势总结 #

这两种方式都完美符合你的需求：

• 完全不需要生成任何SOAP客户端类、JAXB映射对象，直接复用SoapUI里的原始XML
• 代码极简，适合快速排查问题、编写集成测试验证服务可用性
• 如果需要处理安全认证（比如Basic Auth），直接在请求头里添加Authorization字段即可，非常灵活

内容的提问来源于stack exchange，提问作者WishIWasJeeping