如何使用WebService服務端返回對象

這裏簡單的講一下如何使用WebService服務端返回對象，先建立一個接口

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@WebService(name = "HelloWorld",targetNamespace = "http://example/")
public interface HelloWorldInterfaces {

    @WebMethod
    Person getPerson(@WebParam(name = "name")String name,@WebParam(name = "age")int age);

}複製代碼

建立它的實現類，這裏面的main方法就是WebService啓動的入口：

@WebService()
public class HelloWorld implements HelloWorldInterfaces {

    @WebMethod
    @Override
    public  Person getPerson(@WebParam(name = "name")String name,@WebParam(name = "age")int age) {
        Person person = new Person(name,age);
        return person;
    }

    public static void main(String[] argv) {
        String address = "http://127.0.0.1:9000/HelloWorld";
        Endpoint.publish(address, new HelloWorld());
    }

}複製代碼

建立的返回值對象:

public class Person {

    private String name;

    private int age;

    public Person(){

    }

    public Person(String name, int age) {
        this.name = name;
        this.age = age;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public int getAge() {
        return age;
    }

    public void setAge(int age) {
        this.age = age;
    }

}複製代碼

這裏須要注意，在封裝的時候對象必定要有一個無參的構造方法，不然將會報錯，會產生相似這樣的錯誤:

信息: No default constructor found on class model.Person
java.lang.NoSuchMethodException: model.Person.<init>()
	at java.lang.Class.getConstructor0(Class.java:2902)
	at java.lang.Class.getDeclaredConstructor(Class.java:2066)
	at com.sun.xml.internal.bind.v2.ClassFactory.create0(ClassFactory.java:89)
	at com.sun.xml.internal.bind.v2.runtime.ClassBeanInfoImpl.createInstance(ClassBeanInfoImpl.java:269)
	at com.sun.xml.internal.bind.v2.runtime.unmarshaller.UnmarshallingContext.createInstance(UnmarshallingContext.java:658)
	at com.sun.xml.internal.bind.v2.runtime.unmarshaller.StructureLoader.startElement(StructureLoader.java:170)
	at com.sun.xml.internal.bind.v2.runtime.unmarshaller.UnmarshallingContext._startElement(UnmarshallingContext.java:537)
	at com.sun.xml.internal.bind.v2.runtime.unmarshaller.UnmarshallingContext.startElement(UnmarshallingContext.java:516)
	at com.sun.xml.internal.bind.v2.runtime.unmarshaller.InterningXmlVisitor.startElement(InterningXmlVisitor.java:60)
	at com.sun.xml.internal.bind.v2.runtime.unmarshaller.StAXStreamConnector.handleStartElement(StAXStreamConnector.java:231)
	at com.sun.xml.internal.bind.v2.runtime.unmarshaller.StAXStreamConnector.bridge(StAXStreamConnector.java:165)
	at com.sun.xml.internal.bind.v2.runtime.unmarshaller.UnmarshallerImpl.unmarshal0(UnmarshallerImpl.java:355)
	at com.sun.xml.internal.bind.v2.runtime.BridgeImpl.unmarshal(BridgeImpl.java:109)
	at com.sun.xml.internal.bind.api.Bridge.unmarshal(Bridge.java:222)
	at com.sun.xml.internal.ws.client.sei.ResponseBuilder$DocLit.readResponse(ResponseBuilder.java:539)
	at com.sun.xml.internal.ws.client.sei.SyncMethodHandler.invoke(SyncMethodHandler.java:110)
	at com.sun.xml.internal.ws.client.sei.SyncMethodHandler.invoke(SyncMethodHandler.java:78)
	at com.sun.xml.internal.ws.client.sei.SEIStub.invoke(SEIStub.java:135)
	at com.sun.proxy.$Proxy15.getPerson(Unknown Source)
	at example.Client.test3(Client.java:40)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:606)
	at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50)
	at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
	at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)
	at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
	at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)
	at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:78)
	at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:57)
	at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)
	at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)
	at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
	at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)
	at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)
	at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
	at org.junit.runner.JUnitCore.run(JUnitCore.java:137)
	at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:68)
	at com.intellij.rt.execution.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:47)
	at com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:242)
	at com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:70)


java.lang.NoSuchMethodError: model.Person.<init>()複製代碼

，這個問題其實就是WebService建立對象的時候會先去尋找它的無參構造方法，若是咱們一開始就寫了一個有參的構造方法則會報錯。

最後在建立一個客戶端，這裏直接使用了單元測試:

public class Client {

    @Test
    public void test3() throws Exception{
        URL url = new URL("http://127.0.0.1:9000/HelloWorld?wsdl");
        QName qName = new QName("http://example/","HelloWorldService");
        Service service = Service.create(url,qName);
        HelloWorldInterfaces helloWorld = service.getPort(HelloWorldInterfaces.class);
        Person person = helloWorld.getPerson("tom",25);
        System.out.println(person);
    }


}複製代碼

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