java rest版简单的webservice

目前的webservice风格，rest应该是其中一种 还有种就是soap，rest是轻量级的，越来越流行。下面举一个简单例子说明下rest的用法。

1. 准备ws的jar和spring的jar，如何要连接数据的话就自行准备这边就不提供了

下载jar地址：http://download.csdn.net/detail/taopeng_100/7827035

或者:http://pan.baidu.com/s/1qWVejtq

下载好jar之后将其放入lib下就可以了。

1. 创建个项目，名叫RestwsTest,配置spring配置文件spring-source.xml

spring-source.xml如下:

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
    xmlns:context="http://www.springframework.org/schema/context"
    xmlns:aop="http://cxf.apache.org/aop" xmlns:tx="http://www.springframework.org/schema/tx"
    xmlns:jaxws="http://cxf.apache.org/jaxws" xmlns:jaxrs="http://cxf.apache.org/jaxrs"
    xmlns:jee="http://www.springframework.org/schema/jee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="
    http://www.springframework.org/schema/beans
    http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
    http://www.springframework.org/schema/context
    http://www.springframework.org/schema/context/spring-context-3.0.xsd
    http://www.springframework.org/schema/tx
    http://www.springframework.org/schema/tx/spring-tx-3.0.xsd
    http://www.springframework.org/schema/aop
    http://www.springframework.org/schema/aop/spring-aop-3.0.xsd
    http://www.springframework.org/schema/jee
    http://www.springframework.org/schema/jee/spring-jee-3.2.xsd
    http://cxf.apache.org/jaxws
    http://cxf.apache.org/schemas/jaxws.xsd
    http://cxf.apache.org/jaxrs
    http://cxf.apache.org/schemas/jaxrs.xsd">
    <context:annotation-config />
    <context:component-scan base-package="com.*" />
    <import resource="classpath:META-INF/cxf/cxf.xml" />
    <import resource="classpath:META-INF/cxf/cxf-extension-soap.xml" />
    <import resource="classpath:META-INF/cxf/cxf-servlet.xml" />
    <bean id="restSample" class="com.hoo.service.RESTSampleSource" />
    <jaxrs:server id="restServiceContainer" address="/rest">
        <jaxrs:serviceBeans>
            <bean class="com.tp.soft.web.ws.impl.LoginServiceImpl" />
        </jaxrs:serviceBeans>
        <jaxrs:extensionMappings>
            <entry key="json" value="application/json" />
            <entry key="" value="application/" />
        </jaxrs:extensionMappings>
        <jaxrs:languageMappings>
            <entry key="en" value="en-gb"></entry>
        </jaxrs:languageMappings>
        <jaxrs:providers>
            <bean class="org.codehaus.jackson.jaxrs.JacksonJsonProvider" />
        </jaxrs:providers>
    </jaxrs:server>
</beans>

2. 配置web.xml文件

web.xml内容如下:

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xmlns="http://java.sun.com/xml/ns/javaee"
    xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"
    id="WebApp_ID" version="3.0">
    <display-name>RestwsTest</display-name>
    <welcome-file-list>
        <welcome-file>index.jsp</welcome-file>
    </welcome-file-list>
    <context-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>classpath:spring-source.xml</param-value>
    </context-param>
    <listener>
        <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
    </listener>
    <servlet>
        <servlet-name>CXFServlet</servlet-name>
        <servlet-class>org.apache.cxf.transport.servlet.CXFServlet</servlet-class>
        <load-on-startup>0</load-on-startup>
    </servlet>
    <servlet-mapping>
        <servlet-name>CXFServlet</servlet-name>
        <url-pattern>/ws/*</url-pattern>
    </servlet-mapping>
</web-app>

3. 编写接口LoginService

LoginService.java如下:

package com.tp.soft.web.ws;

import java.util.Map;
import javax.jws.WebService;

@WebService
public interface LoginService {
    public abstract Map<String, Object> doLogin(String username, String password);
}

4. 编写接口的实现类LoginServiceImpl

LoginServiceImpl.java如下:

package com.tp.soft.web.ws.impl;

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

import javax.ws.rs.FormParam;
import javax.ws.rs.GET;
import javax.ws.rs.Path;
import javax.ws.rs.Produces;
import javax.ws.rs.core.MediaType;

import com.tp.soft.web.ws.LoginService;

@Path("/loginService")
public class LoginServiceImpl implements LoginService {
    @POST
    @Path(value = "/login")
    @Produces(MediaType.APPLICATION_JSON)
    public Map<String, Object> doLogin(
            @FormParam(value = "username") String username,
            @FormParam(value = "password") String password) {
        Map<String, Object> map = new HashMap<String, Object>();
        map.put("user", username + password);
        return map;
    }
}

此时可以在本地直接通过浏览器访问地址：http://localhost:8080/RestwsTest/ws/rest/loginService /login?username="zs"&password="123"

特别注意这边访问的是通过get的 如果要能访问就要将@POST改成@GET

4. 服务器写好了，下面就来写客服端的代码，客户端主要就是获取user对象的json，代码如下：

RestClient.java如下:

package com.tp.soft.client;

import java.io.IOException;
import java.util.Map;
import org.apache.commons.httpclient.HttpClient;
import org.apache.commons.httpclient.HttpException;
import org.apache.commons.httpclient.NameValuePair;
import org.apache.commons.httpclient.methods.PostMethod;

public class RestClient {
    public static void main(String[] args) {
        String url = "http://localhost:8080/RestwsTest/ws/rest/loginService/login";
        HttpClient client = new HttpClient();
        PostMethod method = new PostMethod(url);
        NameValuePair[] data = { new NameValuePair("username", "zs"),
                new NameValuePair("password", "123") };
        method.setRequestBody(data);
        try {
            int statusCode = client.executeMethod(method);
            if (statusCode == 200) {
                String strJson = method.getResponseBodyAsString();
                System.out.println(strJson);
                // System.out.println(map.get("user").getUsername());
            }
        } catch (HttpException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}

注意上面代码里面的PostMethod，在LoginServiceImpl里面的方法必须是@POST才可以,如果是@GET或者其他会报错的。

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" 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