上一篇写了个最简单的小例子,只是为了说明JAVA6开发Web Service很方便,这一篇稍微深入一点,写个稍微有点代表性的小例子。
依然使用 JAX-WS(jdk自带的实现)方式,这次要在服务中使用一个复杂类型Customer,并实现附件传输的功能,这里使用MTOM的附件传输方式。MTOM(SOAP Message Transmission Optimization Mechanism)是SOAP 消息传输优化机制,MTOM可以在SOAP 消息中发送二进制数据。
先来看Customer类:
- package com.why.server;
- import java.util.Date;
- import javax.activation.DataHandler;
- import javax.xml.bind.annotation.XmlAccessType;
- import javax.xml.bind.annotation.XmlAccessorType;
- import javax.xml.bind.annotation.XmlMimeType;
- import javax.xml.bind.annotation.XmlRootElement;
- @XmlRootElement(name = "Customer")
- @XmlAccessorType(XmlAccessType.FIELD)
- public class Customer {
- private long id;
- private String name;
- private Date birthday;
- @XmlMimeType("application/octet-stream")
- private DataHandler imageData;
- //getter and setter
- ......
- }
MTOM 方式中要传输的附件必须使用javax.activation.DataHandler 类,还要注意必须在类上使用@XmlAccessorType(FIELD)注解,标注JAXB 在进行JAVA 对象与XML 之间进行转换时只关注字段,而不关注属性(getXXX()方法),否则发布Web 服务时会报出现了两个imageData 属性的错误,原因未知,可能是BUG。
然后使用@XmlMimeType 注解标注这是一个附件类型的数据,这里我们标注imageData 是一个二进制文件,当然你也可以使用具体的MIME类型,譬如:image/jpg、image/gif 等,但要考虑到客户端是否支持。
接口类:
- package com.why.server;
- import javax.jws.WebParam;
- import javax.jws.WebService;
- import javax.xml.ws.soap.MTOM;
- /**
- *
- * @author why
- *
- */
- @WebService(name="Hello")
- @SOAPBinding(style = SOAPBinding.Style.RPC)
- @MTOM
- public interface Hello {
- public void printContext();
- public Customer selectCustomerByName(@WebParam(name = "customer")Customer customer);
- public Customer selectMaxAgeCustomer(Customer c1, Customer c2);
- }
@MTOM注解用于开启MTOM功能。
@WebService注解中的name属性标注在接口类上,可以指定wsdl中接口名称,也就是生成的客户端代码中接口类的名字。
@SOAPBinding(style = SOAPBinding.Style.RPC)指定SOAP消息样式,有两个枚举值:SOAPBinding.Style.DOCUMENT(默认)和SOAPBinding.Style.RPC,可以对比这两种方式生成的wsdl会有所不同,而且生成的客户端代码也会有所不同。
实现类:
- package com.why.server;
- import java.io.File;
- import java.io.FileOutputStream;
- import java.io.IOException;
- import java.io.InputStream;
- import java.io.OutputStream;
- import java.text.ParseException;
- import java.text.SimpleDateFormat;
- import java.util.Date;
- import java.util.Set;
- import javax.activation.DataHandler;
- import javax.activation.FileDataSource;
- import javax.annotation.Resource;
- import javax.jws.WebService;
- import javax.xml.ws.WebServiceContext;
- import javax.xml.ws.handler.MessageContext;
- /**
- *
- * @author why
- *
- */
- @WebService(serviceName="HelloService",portName="HelloServicePort",targetNamespace="http://service.why.com/",endpointInterface="com.why.server.Hello")
- public class HelloImpl implements Hello {
- @Resource
- private WebServiceContext context;
- @Override
- public void printContext(){
- MessageContext ctx = context.getMessageContext();
- Set<String> set = ctx.keySet();
- for (String key : set) {
- System.out.println("{" + key + "," + ctx.get(key) +"}");
- try {
- System.out.println("key.scope=" + ctx.getScope(key));
- } catch (Exception e) {
- System.out.println(key + " is not exits");
- }
- }
- }
- @Override
- public Customer selectCustomerByName(Customer customer) {
- if("why".equals(customer.getName())){
- customer.setId(1);
- try {
- customer.setBirthday(new SimpleDateFormat("yyyy-MM-dd").parse("1985-10-07"));
- } catch (ParseException e) {
- e.printStackTrace();
- }
- customer.setImageData(new DataHandler(new FileDataSource(new File("c:"+ File.separator + "why.jpg"))));
- }else{
- customer.setId(2);
- customer.setBirthday(new Date());
- customer.setImageData(new DataHandler(new FileDataSource(new File("c:"+ File.separator + "origin.jpg"))));
- }
- return customer;
- }
- @Override
- public Customer selectMaxAgeCustomer(Customer c1, Customer c2) {
- try {
- // 输出接收到的附件
- System.out.println("c1.getImageData().getContentType()=" + c1.getImageData().getContentType());
- InputStream is = c2.getImageData().getInputStream();
- OutputStream os = new FileOutputStream("c:\\temp1.jpg");
- byte[] bytes = new byte[1024];
- int c;
- while ((c = is.read(bytes)) != -1) {
- os.write(bytes, 0, c);
- }
- os.close();
- System.out.println("c2.getImageData().getContentType()=" + c2.getImageData().getContentType());
- is = c2.getImageData().getInputStream();
- os = new FileOutputStream("c:\\temp2.jpg");
- bytes = new byte[1024];
- while ((c = is.read(bytes)) != -1) {
- os.write(bytes, 0, c);
- }
- os.close();
- } catch (IOException e) {
- e.printStackTrace();
- }
- if (c1.getBirthday().getTime() > c2.getBirthday().getTime()){
- return c2;
- }
- else{
- return c1;
- }
- }
- }
@WebService注解的serviceName属性指定wsdl中service节点的name属性值。portName属性指定wsdl中service节点下port节点name属性值。targetNamespace属性指定wsdl根节点definitions的targetNamespace属性值。endpointInterface属性指定要发布的WebService接口的全路径名,当实现类实现了多个接口时,需要通过此属性标注哪个类是WebService的服务端点接口(SEI)。
在这个类中,通过@Resource注解注入了一个WebServiceContext对象,这个对象即是WebService的上下文环境。
发布这个服务:
- package com.why.server;
- import javax.xml.ws.Endpoint;
- /**
- *
- * @author why
- *
- */
- public class SoapServer {
- public static void main(String[] args) {
- Endpoint.publish("http://localhost:8080/helloService",new HelloImpl());
- }
- }
在命令行键入“wsimport -p com.why.client -keep http://localhost:8080/helloService?wsdl”生成客户端代码,拷贝到工程相应文件夹里,这时,就可以调用这个服务了:
- package com.why.client;
- import java.io.FileOutputStream;
- import java.io.IOException;
- import java.io.InputStream;
- import java.io.OutputStream;
- import java.net.MalformedURLException;
- import java.net.URL;
- import java.text.ParseException;
- import java.text.SimpleDateFormat;
- import java.util.GregorianCalendar;
- import javax.activation.DataHandler;
- import javax.activation.DataSource;
- import javax.activation.FileDataSource;
- import javax.xml.datatype.DatatypeConfigurationException;
- import javax.xml.datatype.DatatypeFactory;
- import javax.xml.namespace.QName;
- /**
- *
- * @author why
- *
- */
- public class SoapClient {
- public static void main(String[] args) throws ParseException, MalformedURLException {
- QName qName = new QName("http://service.why.com/","HelloService");
- HelloService helloService = new HelloService(new URL("http://127.0.0.1:8080/helloService?wsdl"),qName);
- Hello hello = (Hello) helloService.getPort(Hello.class);
- hello.printContext();
- System.out.println("---------------------------------------------------");
- Customer customer = new Customer();
- customer.setName("why");
- DataSource ds = hello.selectCustomerByName(customer).getImageData().getDataSource();
- String attachmentMimeType = ds.getContentType();
- System.out.println(attachmentMimeType);
- try {
- InputStream is = ds.getInputStream();
- OutputStream os = new FileOutputStream("c:\\why_temp.jpg");
- byte[] bytes = new byte[1024];
- int c;
- while ((c = is.read(bytes)) != -1) {
- os.write(bytes, 0, c);
- }
- } catch (IOException e) {
- e.printStackTrace();
- }
- System.out.println("########################################");
- Customer c1 = new Customer();
- c1.setId(1);
- c1.setName("why");
- GregorianCalendar calendar = (GregorianCalendar)GregorianCalendar.getInstance();
- calendar.setTime(new SimpleDateFormat("yyyy-MM-dd").parse("1985-10-07"));
- try {
- c1.setBirthday(DatatypeFactory.newInstance().newXMLGregorianCalendar(calendar));
- } catch (DatatypeConfigurationException e) {
- e.printStackTrace();
- }
- c1.setImageData(new DataHandler(new FileDataSource("c:\\c1.jpg")));
- Customer c2 = new Customer();
- c2.setId(2);
- c2.setName("abc");
- calendar.setTime(new SimpleDateFormat("yyyy-MM-dd").parse("1986-10-07"));
- try {
- c2.setBirthday(DatatypeFactory.newInstance().newXMLGregorianCalendar(calendar));
- } catch (DatatypeConfigurationException e) {
- e.printStackTrace();
- }
- c2.setImageData(new DataHandler(new FileDataSource("c:\\c2.jpg")));
- Customer c = hello.selectMaxAgeCustomer(c1,c2);
- System.out.println(c.getName());
- }
- }
附件是我的工程,当然运行这个程序,需先在C盘建立几个文件c1.jpg、c2.jpg、origin.jpg和why.jpg。