（十）web服务与javaweb结合（1）

一、解决方法

　　A . 编写一个监听器，在监听器中发布服务

二、案例一

• 方法A：编写一个监听器，在监听器中发布服务

　　1. 　　编写服务接口

package com.shyroke.service;

import javax.jws.WebParam;
import javax.jws.WebResult;
import javax.jws.WebService;

@WebService
public interface IFirst {

    @WebResult(name = "addResult")
    public int add(@WebParam(name = "x") int x, @WebParam(name = "y") int y);
}

　　2.　　实现服务接口

package com.shyroke.service;

import javax.jws.WebParam;
import javax.jws.WebResult;
import javax.jws.WebService;

@WebService(endpointInterface = "com.shyroke.service.IFirst")
public class IFirstImpl implements IFirst {

    public int add(int x, int y) {
        return x + y;
    }

}

　　3.　　在监听器中发布

package com.shyroke.listener;

import javax.crypto.EncryptedPrivateKeyInfo;
import javax.servlet.ServletContextEvent;
import javax.servlet.ServletContextListener;
import javax.xml.ws.Endpoint;

import com.shyroke.service.IFirstImpl;

public class MyListener implements ServletContextListener {

    public void contextInitialized(ServletContextEvent arg0) {
        System.out.println("项目初始化。。");

        /**
         * 发布服务
         */

        Endpoint.publish("http://localhost:3030/web_webService", new IFirstImpl());

        System.out.println("发布服务。。。。。。");
    }

    public void contextDestroyed(ServletContextEvent arg0) {
        System.out.println("项目销毁。。");

    }

}

　　4.　　 编写servlet

package com.shyroke.servlet;

import java.io.IOException;
import java.io.PrintWriter;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

public class TestServlet extends HttpServlet {

    @Override
    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        this.doPost(req, resp);
    }

    @Override
    protected void doPost(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {

        request.setCharacterEncoding("UTF-8");
        response.setContentType("text/html;charset=UTF-8");

        PrintWriter out = response.getWriter();
        out.print("这是一个servlet");

        out.flush();
        out.close();

    }

}

　　5.　　web.xml配置监听器和servlet

<!DOCTYPE web-app PUBLIC
 "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"
 "http://java.sun.com/dtd/web-app_2_3.dtd" >

<web-app>

        <listener>
            <listener-class>com.shyroke.listener.MyListener</listener-class>
        </listener>

    <servlet>
        <servlet-name>testServlet</servlet-name>
        <servlet-class>com.shyroke.servlet.TestServlet</servlet-class>
    </servlet>

    <servlet-mapping>
        <servlet-name>testServlet</servlet-name>
        <url-pattern>/servlet/TestServlet</url-pattern>
    </servlet-mapping>
</web-app>

　　6.　　结果

• 缺陷

  • 　　通过监听器发布的web服务，web服务的端口和web工程的端口是不能一致的，否则就会报错。