Apache CXF实现Web Service（3）——Tomcat容器和不借助Spring的普通Servlet实现JAX-RS(RESTful) web se

secce

起步
　　参照这一系列的另外一篇文章：
Apache CXF实现Web Service（2）——不借助重量级Web容器和Spring实现一个纯的JAX-RS(RESTful) web service
首先在eclipse中新建一个Dynamic Web Project，然后实现上篇文章中的所有类，唯一不同的是这里，我们不需要一个Server.java来启动一个Web Service。我们用CXF自带的org.apache.cxf.jaxrs.servlet.CXFNonSpringJaxrsServlet来在容器中启动一个Web Service服务。
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.cnblog.richaaaard.cxftest</groupId>  
<artifactId>cxf-test-servlet-rs-helloworld</artifactId>  
<packaging>war</packaging>  
<version>1.0-SNAPSHOT</version>  
<name>cxf-test-servlet-rs-helloworld Maven Webapp</name>  
<url>http://maven.apache.org</url>  
<properties>  
<cxf.version>3.1.4</cxf.version>           
</properties>  
<dependencies>  
<dependency>  
<groupId>org.apache.cxf</groupId>  
<artifactId>cxf-rt-frontend-jaxrs</artifactId>  
<version>${cxf.version}</version>  
</dependency>  
<dependency>  
<groupId>org.apache.cxf</groupId>  
<artifactId>cxf-rt-transports-http</artifactId>  
<version>${cxf.version}</version>  
</dependency>  
<dependency>  
<groupId>org.apache.cxf</groupId>  
<artifactId>cxf-rt-transports-http-jetty</artifactId>  
<version>${cxf.version}</version>  
</dependency>
<dependency>
<groupId>org.apache.cxf</groupId>
<artifactId>cxf-rt-rs-extension-providers</artifactId>
<version>${cxf.version}</version>
</dependency>
<dependency>
<groupId>org.codehaus.jackson</groupId>
<artifactId>jackson-xc</artifactId>
<version>1.9.0</version>
</dependency>
<dependency>
<groupId>org.codehaus.jackson</groupId>
<artifactId>jackson-jaxrs</artifactId>
<version>1.9.0</version>
</dependency>
<dependency>  
<groupId>javax.ws.rs</groupId>  
<artifactId>jsr311-api</artifactId>  
<version>1.1.1</version>  
</dependency>  
<dependency>  
<groupId>org.slf4j</groupId>  
<artifactId>slf4j-api</artifactId>  
<version>1.5.8</version>  
</dependency>  
<dependency>  
<groupId>org.slf4j</groupId>  
<artifactId>slf4j-simple</artifactId>  
<version>1.5.8</version>  
</dependency>  
<dependency>  
<groupId>commons-httpclient</groupId>  
<artifactId>commons-httpclient</artifactId>  
<version>3.0</version>  
</dependency>  
<dependency>  
<groupId>commons-io</groupId>  
<artifactId>commons-io</artifactId>  
<version>2.3</version>  
</dependency>  
<dependency>  
<groupId>junit</groupId>  
<artifactId>junit</artifactId>  
<version>4.8.1</version>  
<scope>test</scope>  
</dependency>  
</dependencies>  
<build>  
<finalName>cxf</finalName>  
<resources>  
<resource>  
<directory>src/main/resources</directory>  
</resource>  
<resource>  
<directory>src/main/java</directory>  
<includes>  
<include>**</include>  
</includes>  
<excludes>  
<exclude>**/*.java</exclude>  
</excludes>  
</resource>  
</resources>  
<plugins>  
<plugin>  
<groupId>org.mortbay.jetty</groupId>  
<artifactId>maven-jetty-plugin</artifactId>  
<configuration>  
<contextPath>/</contextPath>  
<connectors>  
<connector implementation="org.mortbay.jetty.nio.SelectChannelConnector">  
<port>9000</port>  
</connector>  
</connectors>  
</configuration>  
</plugin>  
<plugin>  
<groupId>org.apache.maven.plugins</groupId>  
<artifactId>maven-compiler-plugin</artifactId>  
<configuration>  
<source>1.7</source>  
<target>1.7</target>  
</configuration>  
</plugin>  
</plugins>  
</build>  
</project>  

　　主要的配置都在web.xml中



<?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_2_5.xsd" id="WebApp_ID" version="2.5">
<display-name>cxf</display-name>  
<servlet>
<servlet-name>cxf</servlet-name>
<display-name>cxf</display-name>
<servlet-class>
org.apache.cxf.jaxrs.servlet.CXFNonSpringJaxrsServlet
</servlet-class>
<init-param>
<param-name>jaxrs.serviceClasses</param-name>
<param-value>
com.cnblog.richaaaard.cxftest.servlet.rs.helloworld.service.RoomService      
</param-value>
</init-param>
<init-param>
<param-name>jaxrs.providers</param-name>
<param-value>
org.codehaus.jackson.jaxrs.JacksonJaxbJsonProvider     
</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>cxf</servlet-name>
<url-pattern>/services/*</url-pattern>
</servlet-mapping>
<session-config>
<session-timeout>60</session-timeout>
</session-config>
</web-app>

　　可以发现我们使用了org.apache.cxf.jaxrs.servlet.CXFNonSpringJaxrsServlet这个Servlet包括使用里面一些启动参数：

jaxrs.serviceClasses
jaxrs.providers
　　来配置RESTful Web Service，其参数与我们上篇文章中用代码JAXRSServerFactoryBean的参数设置一致。

启动测试
　　我们在Eclipse中，将Web项目在Tomcat中运行

　　Tomcat运行Run As... -> Run on Server

最后
　　我们用浏览器访问Tomcat默认的8080端口地址：http://localhost:8080/cxf/services/roomservice/room

补充 Servlet配置参数模板
　　（注意：这只是一个模板，需要修改相关参数，请勿直接复制粘贴到项目中）



<servlet>
<servlet-name>CXFServlet</servlet-name>
<display-name>CXF Servlet</display-name>
<servlet-class>
org.apache.cxf.jaxrs.servlet.CXFNonSpringJaxrsServlet
</servlet-class>
<init-param>
<param-name>jaxrs.serviceClasses</param-name>
<param-value>
org.apache.cxf.systest.jaxrs.BookStore1,
org.apache.cxf.systest.jaxrs.BookStore2         
</param-value>
</init-param>
<init-param>
<param-name>jaxrs.providers</param-name>
<param-value>
org.apache.cxf.systest.jaxrs.BookStoreProvider1,
org.apache.cxf.systest.jaxrs.BookStoreProvider2         
</param-value>
</init-param>
<!-- enables schema validation -->
<init-param>
<param-name>jaxrs.schemaLocations</param-name>
<param-value>
classpath:/WEB-INF/schemas/schema1.xsd
classpath:/WEB-INF/schemas/schema2.xsd           
</param-value>
</init-param>
<!-- registers CXF in interceptors -->
<init-param>
<param-name>jaxrs.inInterceptors</param-name>
<param-value>
org.apache.cxf.systest.jaxrs.CustomInInterceptor
</param-value>
</init-param>
<!-- registers CXF out interceptors -->
<init-param>
<param-name>jaxrs.outInterceptors</param-name>
<param-value>
org.apache.cxf.systest.jaxrs.CustomOutInterceptor
</param-value>
</init-param>
<!-- registers extension mappings -->
<init-param>
<param-name>jaxrs.extensions</param-name>
<param-value>
xml=application/xml
json=application/json
</param-value>
</init-param>
<!-- registers contextual properties -->
<init-param>
<param-name>jaxrs.properties</param-name>
<param-value>
property1=value
property2=value
</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>

　　参考：
　　http://zzxanadu.iteye.com/blog/542249（这仍然属于一个programatic实现的例子，只不过做到了servlet load方法中，未验证成功）
　　https://cwiki.apache.org/confluence/display/CXF20DOC/JAXRS+Services+Configuration#JAXRSServicesConfiguration-WithCXFNonSpringJaxrsServlet