1.Hello World - WebWebService

Create a new Maven webapp project in Eclipse

1. 参考此篇文章，在Eclipse创建一个基于Maven的webapp项目。其中Artifact Id按照如下设置
   http://www.cnblogs.com/xxuan/p/6739633.html
   

2. 修改Maven项目文件pom.xml，如下。增加对jersey的依赖。

   pom.xml

   <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
       <modelVersion>4.0.0</modelVersion>
       <groupId>com.xuan..tutorial</groupId>
       <artifactId>hello-world-ws</artifactId>
       <packaging>war</packaging>
       <version>1.0.0</version>
       <name>hello-world-ws Maven Webapp</name>
       <url>http://maven.apache.org</url>
       <dependencies>
           <dependency>
               <groupId>junit</groupId>
               <artifactId>junit</artifactId>
               <version>4.8.1</version>
               <scope>test</scope>
           </dependency>
           <dependency>
               <groupId>com.sun.jersey</groupId>
               <artifactId>jersey-server</artifactId>
               <version>1.8</version>
           </dependency>
       </dependencies>
       <build>
           <finalName>hello-world-ws</finalName>
       </build>
       <repositories>
           <repository>
               <id>snapshot-repository.java.net</id>
               <name>Java.net Snapshot Repository for Maven</name>
               <url>https://maven.java.net/content/repositories/snapshots/</url>
               <layout>default</layout>
           </repository>
       </repositories>
   </project>

    

Add HelloWorld Web Service Implementation

1. 在src/main/java目录下新增Web Service实现源码文件HelloWorldService.java
   

2. 编辑HelloWorldService.java文件，内容如下　　

3. package com.xuan.flight.tutorial.ws;
    
   import javax.ws.rs.GET;
   import javax.ws.rs.Path;
   import javax.ws.rs.PathParam;
    
   @Path("/hello")
   public class HelloWorldService
   {  
       @GET
       @Path("/{param}")
       public String sayHello(@PathParam("param") String msg)
       {
           String output = "Hello : " + msg;
           return output;
       }
   }

    

4. 编辑WEB-INF下的web.xml文件，注册Jersey的Servlet“com.sun.jersey.spi.container.servlet.ServletContainer“, 并将刚才生成的Web Service目录作为其初始化参数 “init-param“, “com.sun.jersey.config.property.packages“.

5. <!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>
     <display-name>Archetype Created Web Application</display-name>
      
     <servlet>
           <servlet-name>jersey-serlvet</servlet-name>
           <servlet-class>
                        com.sun.jersey.spi.container.servlet.ServletContainer
                   </servlet-class>
           <init-param>
                <param-name>com.sun.jersey.config.property.packages</param-name>
                <param-value>com.ctrip.flight.tutorial.ws</param-value>
           </init-param>
           <load-on-startup>1</load-on-startup>
       </servlet>
       <servlet-mapping>
           <servlet-name>jersey-serlvet</servlet-name>
           <url-pattern>/rest/*</url-pattern>
       </servlet-mapping>
   </web-app>

    

Compile & Deploy

1. 进入项目所在目录(pom.xml文件所在位置)，运行命令mvn clean package。在target目录下生成了文件hello-world-ws.war。
2. 将hello-world-web.war文件copy到${TOMCAT_HOME}/webapps目录下，重启tomcat。

3. 在浏览器中访问http://localhost:8080/hello-world-ws/rest/hello/world，可以看到如下输出。

   Hello : world