CXF实现Restful WebService基础示例

CXF实现Restful WebService基础示例

一、写在前面

IDE:IDEA14
JDK:1.7
CXF:2.6.2
示例来源:%CXF_HOME%\samples\jax_rs\basic
发布方式:JAXRSServerFactoryBean的create()方法
调用方式:URL的openStream()方法、HttpClient的executeMethod()方法

二、服务端(Java项目)

1. 准备Jar包

cxf-2.6.2.jar
geronimo-servlet_2.5_spec-1.1.2.jar
jetty-continuation-7.5.4.v20111024.jar
jetty-http-7.5.4.v20111024.jar
jetty-io-7.5.4.v20111024.jar
jetty-server-7.5.4.v20111024.jar
jetty-util-7.5.4.v20111024.jar
jsr311-api-1.1.1.jar
neethi-3.0.2.jar
wsdl4j-1.6.2.jar

2. 实体类

package com.yale.entity;

import javax.xml.bind.annotation.XmlRootElement;

@XmlRootElement(name = "Customer")
public class Customer {
    private long id;
    private String name;

    public long getId() {
        return id;
    }

    public void setId(long id) {
        this.id = id;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }
}
package com.yale.entity;

import javax.xml.bind.annotation.XmlRootElement;

@XmlRootElement(name = "Product")
public class Product {
    private long id;
    private String description;

    public long getId() {
        return id;
    }

    public void setId(long id) {
        this.id = id;
    }

    public String getDescription() {
        return description;
    }

    public void setDescription(String d) {
        this.description = d;
    }
}
package com.yale.entity;

import java.util.HashMap;
import java.util.Map;
import javax.ws.rs.GET;
import javax.ws.rs.Path;
import javax.ws.rs.PathParam;

import javax.xml.bind.annotation.XmlRootElement;

@XmlRootElement(name = "Order")
public class Order {
    private long id;
    private String description;
    private Map<Long, Product> products = new HashMap<Long, Product>();

    public Order() {
        init();
    }

    public long getId() {
        return id;
    }

    public void setId(long id) {
        this.id = id;
    }

    public String getDescription() {
        return description;
    }

    public void setDescription(String d) {
        this.description = d;
    }

    @GET
    @Path("products/{productId}/")
    public Product getProduct(@PathParam("productId")int productId) {
        System.out.println("----invoking getProduct with id: " + productId);
        Product p = products.get(new Long(productId));
        return p;
    }

    final void init() {
        Product p = new Product();
        p.setId(323);
        p.setDescription("product 323");
        products.put(p.getId(), p);
    }
}

3. 提供服务

package com.yale.service;

import com.yale.entity.Customer;
import com.yale.entity.Order;

import java.util.HashMap;
import java.util.Map;

import javax.ws.rs.DELETE;
import javax.ws.rs.GET;
import javax.ws.rs.POST;
import javax.ws.rs.PUT;
import javax.ws.rs.Path;
import javax.ws.rs.PathParam;
import javax.ws.rs.core.Response;

@Path("/customerservice/")
public class CustomerService {
    long currentId = 123;
    Map<Long, Customer> customers = new HashMap<Long, Customer>();
    Map<Long, Order> orders = new HashMap<Long, Order>();

    public CustomerService() {
        init();
    }

    @GET
    @Path("/customers/{id}/")
    public Customer getCustomer(@PathParam("id") String id) {
        System.out.println("----invoking getCustomer, Customer id is: " + id);
        long idNumber = Long.parseLong(id);
        Customer c = customers.get(idNumber);
        return c;
    }

    @PUT
    @Path("/customers/")
    public Response updateCustomer(Customer customer) {
        System.out.println("----invoking updateCustomer, Customer name is: " + customer.getName());
        Customer c = customers.get(customer.getId());
        Response r;
        if (c != null) {
            customers.put(customer.getId(), customer);
            r = Response.ok().build();
        } else {
            r = Response.notModified().build();
        }

        return r;
    }

    @POST
    @Path("/customers/")
    public Response addCustomer(Customer customer) {
        System.out.println("----invoking addCustomer, Customer name is: " + customer.getName());
        customer.setId(++currentId);

        customers.put(customer.getId(), customer);

        return Response.ok(customer).build();
    }

    @DELETE
    @Path("/customers/{id}/")
    public Response deleteCustomer(@PathParam("id") String id) {
        System.out.println("----invoking deleteCustomer, Customer id is: " + id);
        long idNumber = Long.parseLong(id);
        Customer c = customers.get(idNumber);

        Response r;
        if (c != null) {
            r = Response.ok().build();
            customers.remove(idNumber);
        } else {
            r = Response.notModified().build();
        }

        return r;
    }

    @Path("/orders/{orderId}/")
    public Order getOrder(@PathParam("orderId") String orderId) {
        System.out.println("----invoking getOrder, Order id is: " + orderId);
        long idNumber = Long.parseLong(orderId);
        Order c = orders.get(idNumber);
        return c;
    }

    final void init() {
        Customer c = new Customer();
        c.setName("John");
        c.setId(123);
        customers.put(c.getId(), c);

        Order o = new Order();
        o.setDescription("order 223");
        o.setId(223);
        orders.put(o.getId(), o);
    }

}

4. 发布服务

package com.yale.server;

import com.yale.service.CustomerService;
import org.apache.cxf.jaxrs.JAXRSServerFactoryBean;
import org.apache.cxf.jaxrs.lifecycle.SingletonResourceProvider;

public class Server {

    protected Server() throws Exception {
        JAXRSServerFactoryBean sf = new JAXRSServerFactoryBean();
        sf.setResourceClasses(CustomerService.class);
        sf.setResourceProvider(CustomerService.class,
            new SingletonResourceProvider(new CustomerService()));
        sf.setAddress("http://localhost:9000/");

        sf.create();
    }

    public static void main(String args[]) throws Exception {
        new Server();
        System.out.println("Server ready...");

        Thread.sleep(5 * 60 * 1000);
        System.out.println("Server exiting");
        System.exit(0);
    }
}

三、客户端(Java项目)

1. 准备Jar包

commons-codec-1.10.jar
commons-httpclient-3.1.jar
commons-logging-1.1.1.jar
cxf-2.6.2.jar

2. 准备数据

文件路径 :com.yale.client ,与下面的Client类在同一目录。

add_customer.xml

<Customer>
  <name>Jack</name>
</Customer> 

update_customer.xml

<Customer>
  <name>Mary</name>
  <id>123</id>
</Customer> 

3. 调用服务

package com.yale.client;

import java.io.File;
import java.io.InputStream;
import java.net.URL;

import org.apache.commons.httpclient.HttpClient;
import org.apache.commons.httpclient.methods.FileRequestEntity;
import org.apache.commons.httpclient.methods.PostMethod;
import org.apache.commons.httpclient.methods.PutMethod;
import org.apache.commons.httpclient.methods.RequestEntity;

import org.apache.cxf.helpers.IOUtils;
import org.apache.cxf.io.CachedOutputStream;
import org.apache.cxf.resource.URIResolver;

public final class Client {

    private Client() {
    }

    public static void main(String args[]) throws Exception {

        // Sent HTTP GET request to query customer info
        System.out.println("Sent HTTP GET request to query customer info");
        URL url = new URL("http://localhost:9000/customerservice/customers/123");
        InputStream in = url.openStream();
        System.out.println(getStringFromInputStream(in));

        // Sent HTTP GET request to query sub resource product info
        System.out.println("\n");
        System.out.println("Sent HTTP GET request to query sub resource product info");
        url = new URL("http://localhost:9000/customerservice/orders/223/products/323");
        in = url.openStream();
        System.out.println(getStringFromInputStream(in));

        // Sent HTTP PUT request to update customer info
        System.out.println("\n");
        System.out.println("Sent HTTP PUT request to update customer info");
        Client client = new Client();
        String inputFile = client.getClass().getResource("update_customer.xml").getFile();
        URIResolver resolver = new URIResolver(inputFile);
        File input = new File(resolver.getURI());
        PutMethod put = new PutMethod("http://localhost:9000/customerservice/customers");
        RequestEntity entity = new FileRequestEntity(input, "text/xml; charset=ISO-8859-1");
        put.setRequestEntity(entity);
        HttpClient httpclient = new HttpClient();

        try {
            int result = httpclient.executeMethod(put);
            System.out.println("Response status code: " + result);
            System.out.println("Response body: ");
            System.out.println(put.getResponseBodyAsString());
        } finally {
            // Release current connection to the connection pool once you are
            // done
            put.releaseConnection();
        }

        // Sent HTTP POST request to add customer
        System.out.println("\n");
        System.out.println("Sent HTTP POST request to add customer");
        inputFile = client.getClass().getResource("add_customer.xml").getFile();
        resolver = new URIResolver(inputFile);
        input = new File(resolver.getURI());
        PostMethod post = new PostMethod("http://localhost:9000/customerservice/customers");
        post.addRequestHeader("Accept" , "text/xml");
        entity = new FileRequestEntity(input, "text/xml; charset=ISO-8859-1");
        post.setRequestEntity(entity);
        httpclient = new HttpClient();

        try {
            int result = httpclient.executeMethod(post);
            System.out.println("Response status code: " + result);
            System.out.println("Response body: ");
            System.out.println(post.getResponseBodyAsString());
        } finally {
            // Release current connection to the connection pool once you are
            // done
            post.releaseConnection();
        }

        System.out.println("\n");
        System.exit(0);
    }

    private static String getStringFromInputStream(InputStream in) throws Exception {
        CachedOutputStream bos = new CachedOutputStream();
        IOUtils.copy(in, bos);
        in.close();
        bos.close();
        return bos.getOut().toString();
    }

}
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