MAVEN,SPRING,CXF构建REST风格WebService

1.IDEA简历Maven模板webapp项目 2.Pom文件添加依赖项

<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.rminfo</groupId>
<artifactId>test_RestWebservice</artifactId>
<packaging>war</packaging>
<version>1.0-SNAPSHOT</version>
<name>test_RestWebservice Maven Webapp</name>
<url>http://maven.apache.org</url>
<properties>
<spring.version>4.1.4.RELEASE</spring.version>
</properties>
<dependencies>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>3.8.1</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-core</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<version>${spring.version}</version>
</dependency>
<!-- web项目编译时需要，部署到tomcat中就不需要了 -->
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>servlet-api</artifactId>
<version>2.5</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>javax.servlet.jsp</groupId>
<artifactId>jsp-api</artifactId>
<version>2.2</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-databind</artifactId>
<version>2.3.4</version>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-annotations</artifactId>
<version>2.4.0</version>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-core</artifactId>
<version>2.4.3</version>
</dependency>
<dependency>
<groupId>javax.ws.rs</groupId>
<artifactId>jsr311-api</artifactId>
<version>1.1.1</version>
</dependency>
<dependency>
<groupId>org.apache.cxf</groupId>
<artifactId>cxf-rt-frontend-jaxrs</artifactId>
<version>2.4.4</version>
</dependency>
<dependency>
<groupId>org.codehaus.jackson</groupId>
<artifactId>jackson-jaxrs</artifactId>
<version>1.9.13</version>
</dependency>

</dependencies>
<build>
<finalName>test_RestWebservice</finalName>
</build>
</project>

3. 修改web.xml文件

<!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>
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>/WEB-INF/transport-servlet.xml</param-value>
</context-param>
<servlet>
<servlet-name>transport</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>transport</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>

<servlet>
<servlet-name>CXFServlet</servlet-name>
<servlet-class>org.apache.cxf.transport.servlet.CXFServlet</servlet-class>
<load-on-startup>2</load-on-startup>
</servlet>

<servlet-mapping>
<servlet-name>CXFServlet</servlet-name>
<url-pattern>/userService/*</url-pattern>
</servlet-mapping>

<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
</web-app>

4. 添加Spring配置文件transport-servlet.xml

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:jaxrs="http://cxf.apache.org/jaxrs"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.0.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd http://cxf.apache.org/jaxrs http://cxf.apache.org/schemas/jaxrs.xsd ">

<mvc:annotation-driven/>
<context:component-scan base-package="com.rminfo.controller"/>

<jaxrs:server id="userRestService" address="/userservices">
<jaxrs:serviceBeans>
<ref bean="userServiceImpl"/>
</jaxrs:serviceBeans>
</jaxrs:server>
<bean id="userServiceImpl" class="com.rminfo.controller.UserServiceImpl"></bean>

</beans>

5. 建立实体类User，添加注解@XmlRootElement(name = "User")否则会出错：No message body writer has been found for response class User.

package com.rminfo.controller;

import javax.xml.bind.annotation.XmlAccessType;
import javax.xml.bind.annotation.XmlAccessorType;
import javax.xml.bind.annotation.XmlRootElement;
import javax.xml.bind.annotation.XmlType;

/**
* Created by carl on 2016/6/23.
*/
@XmlRootElement(name = "User")
public class User {
private String userId;

private String nickname;

public String getUserId() {
return userId;
}

public void setUserId(String userId) {
this.userId = userId;
}

public String getNickname() {
return nickname;
}

public void setNickname(String nickname) {
this.nickname = nickname;
}

@Override
public String toString() {

return "User{" +
"userId='" + userId + '\'' +
", nickname='" + nickname + '\'' +
'}';
}
}

6. WebService接口类添加注解，以及其实现

package com.rminfo.controller;

import javax.ws.rs.*;
import javax.ws.rs.core.MediaType;

/**
* Created by carl on 2016/6/23.
*/
public interface UserService {

@GET
@Produces(MediaType.APPLICATION_JSON)
@Path("/searchUser/{id}")
public User searchUser(@PathParam("id") String userId);
}

7. 测试是否发布成功：http://localhost:8080/test_RestWebservice/userService

出现上述画面说明发布成功。