j2ee培訓：如何構建RESTful Web Service
JavaEE的核心是EJB3.0, 其提供了更兼便捷的企業級的應用框架。下面yjbys小編為大家準備了關于如何構建RESTful Web Service的文章，歡迎閱讀。
1. 首先是實體類，注意其中的@XmlRootElement注解
package com.googlecode.garbagecan.cxfstudy.jaxrs;
import java.util.Date;
import javax.xml.bind.annotation.XmlRootElement;
@XmlRootElement(name="Customer")
public class Customer {
private String id;
private String name;
private Date birthday;
public String getId() {
return id;
}
public void setId(String id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public Date getBirthday() {
return birthday;
}
public void setBirthday(Date birthday) {
this.birthday = birthday;
}
@Override
public String toString() {
return org.apache.commons.lang.builder.ToStringBuilder.reflectionToString(this);
}
}
2. RESTful Web Service接口類，可以通過修改@Produces注解來聲明暴露接口返回的json還是xml數據格式
package com.googlecode.garbagecan.cxfstudy.jaxrs;
import javax.ws.rs.GET;
import javax.ws.rs.Path;
import javax.ws.rs.PathParam;
import javax.ws.rs.Produces;
import javax.ws.rs.QueryParam;
@Path(value = "/customer")
@Produces("*/*")
//@Produces("application/xml")
//@Produces("application/json")
public interface CustomerService {
@GET
@Path(value = "/{id}/info")
Customer findCustomerById(@PathParam("id")String id);
@GET
@Path(value = "/search")
Customer findCustomerByName(@QueryParam("name")String name);
}
3. RESTful Web Service接口實現類
package com.googlecode.garbagecan.cxfstudy.jaxrs;
import java.util.Calendar;
public class CustomerServiceImpl implements CustomerService {
public Customer findCustomerById(String id) {
Customer customer = new Customer();
customer.setId(id);
customer.setName(id);
customer.setBirthday(Calendar.getInstance().getTime());
return customer;
}
public Customer findCustomerByName(String name) {
Customer customer = new Customer();
customer.setId(name);
customer.setName(name);
customer.setBirthday(Calendar.getInstance().getTime());
return customer;
}
}
4. Server端代碼
package com.googlecode.garbagecan.cxfstudy.jaxrs;
import org.apache.cxf.interceptor.LoggingInInterceptor;
import org.apache.cxf.interceptor.LoggingOutInterceptor;
import org.apache.cxf.jaxrs.JAXRSServerFactoryBean;
public class MyServer {
public static void main(String[] args) throws Exception {
JAXRSServerFactoryBean factoryBean = new JAXRSServerFactoryBean();
factoryBean.getInInterceptors().add(new LoggingInInterceptor());
factoryBean.getOutInterceptors().add(new LoggingOutInterceptor());
factoryBean.setResourceClasses(CustomerServiceImpl.class);
factoryBean.setAddress("http://localhost:9000/ws/jaxrs");
factoryBean.create();
}
}
5. Client端代碼
package com.googlecode.garbagecan.cxfstudy.jaxrs;
import org.apache.commons.httpclient.HttpClient;
import org.apache.commons.httpclient.HttpStatus;
import org.apache.commons.httpclient.methods.GetMethod;
public class MyClient {
public static void main(String[] args) throws Exception {
go("http://localhost:9000/ws/jaxrs/customer/1/info");
go("http://localhost:9000/ws/jaxrs/customer/search?name=abc");
}
private static void go(String url) throws Exception {
HttpClient client = new HttpClient();
GetMethod method = new GetMethod(url);
int statusCode = client.executeMethod(method);
if (statusCode != HttpStatus.SC_OK) {
System.err.println("Method failed: " + method.getStatusLine());
}
byte[] responseBody = method.getResponseBody();
System.out.println(new String(responseBody));
}
}
6.測試
首先運行MyServer類，然后運行MyClient類來驗證Web Service。
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