Resteasy Restful框架

REST即表述性状态传递（英文：Representational State Transfer，简称REST）是Roy Fielding博士在2000年他的博士论文中提出来的一种软件架构风格。它是一种针对网络应用的设计和开发方式，可以降低开发的复杂性，提高系统的可伸缩性。
目前在三种主流的Web服务实现方案中，因为REST模式的Web服务与复杂的SOAP和XML-RPC对比来讲明显的更加简洁，越来越多的web服务开始采用REST风格设计和实现。

RESTEasy是JBoss的开源项目之一，是一个RESTful Web Services框架。RESTEasy的开发者Bill Burke同时也是JAX-RS的J2EE标准制定者之一。JAX-RS是一个JCP制订的新标准，用于规范基于HTTP的RESTful Web Services的API。

例程：

创建Maven项目，选择类型为maven-archetype-webapp

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.gf</groupId>
  <artifactId>Resteasy</artifactId>
  <packaging>war</packaging>
  <version>0.0.1-SNAPSHOT</version>
  <name>Resteasy Maven Webapp</name>
  <url>http://maven.apache.org</url>
  <dependencies>
    <dependency>
      <groupId>junit</groupId>
      <artifactId>junit</artifactId>
      <version>3.8.1</version>
      <scope>test</scope>
    </dependency>
	<!-- https://mvnrepository.com/artifact/org.jboss.resteasy/resteasy-client -->
	<dependency>
	    <groupId>org.jboss.resteasy</groupId>
	    <artifactId>resteasy-client</artifactId>
	    <version>3.0.13.Final</version>
	</dependency>
	<!-- https://mvnrepository.com/artifact/org.jboss.resteasy/resteasy-jaxb-provider -->
	<dependency>
	    <groupId>org.jboss.resteasy</groupId>
	    <artifactId>resteasy-jaxb-provider</artifactId>
	    <version>3.0.13.Final</version>
	</dependency>
	<!-- https://mvnrepository.com/artifact/org.jboss.spec.javax.servlet/jboss-servlet-api_3.1_spec -->
	<dependency>
	    <groupId>org.jboss.spec.javax.servlet</groupId>
	    <artifactId>jboss-servlet-api_3.1_spec</artifactId>
	    <version>1.0.0.Final</version>
	    <scope>provided</scope>
	</dependency>
	<!-- https://mvnrepository.com/artifact/org.jboss.resteasy/tjws -->
	<dependency>
	    <groupId>org.jboss.resteasy</groupId>
	    <artifactId>tjws</artifactId>
	    <version>3.0.13.Final</version>
	    <scope>test</scope>
	</dependency>

  </dependencies>
  <build>
    <finalName>Resteasy</finalName>
        <pluginManagement>
            <plugins>
                <!-- 	配置tomcat7插件 -->
                <plugin>
                    <groupId>org.apache.tomcat.maven</groupId>
                    <artifactId>tomcat7-maven-plugin</artifactId>
                    <version>2.2</version>
                    <configuration>
                    	<path>/</path>
                        <port>8080</port>
                        <uriEncoding>utf-8</uriEncoding><!-- 解决get请求乱码问题 -->
                    </configuration>
                </plugin>
            </plugins>
		</pluginManagement>
  </build>
</project>

Web.xml

<!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>resteasy.resources</param-name>
		<param-value>com.gf.TestBean</param-value>
	</context-param>
	<listener>
		<listener-class>org.jboss.resteasy.plugins.server.servlet.ResteasyBootstrap</listener-class>
	</listener>
	<servlet>
		<servlet-name>resteasy</servlet-name>
		<servlet-class>org.jboss.resteasy.plugins.server.servlet.HttpServletDispatcher</servlet-class>
	</servlet>
	<servlet-mapping>
		<servlet-name>resteasy</servlet-name>
		<url-pattern>/*</url-pattern>
	</servlet-mapping>
</web-app>

测试类

package com.gf;

import javax.ws.rs.DELETE;
import javax.ws.rs.FormParam;
import javax.ws.rs.GET;
import javax.ws.rs.POST;
import javax.ws.rs.PUT;
import javax.ws.rs.Path;
import javax.ws.rs.PathParam;
import javax.ws.rs.Produces;
import javax.ws.rs.QueryParam;

@Path("/testbean")
public class TestBean 
{
	@GET
	@Produces("application/json")
	@Path("test/{id}")
	public String get(@PathParam("id") String id)
	{
		return "Hi "+ id;
	}

	@Path("/test/save")
	@POST
	public String save(@FormParam("year") String year)
	{
		System.out.println("save year="+year);
		return year;
	}
	
	@Path("/test/update/{id}")
	@PUT
	public String update(@PathParam("id") String id,@QueryParam("name") String name)
	{
		System.out.println("update id="+id+",name="+name);
		return id+","+name;
	}
	
	@Path("/test/delete/{id}")
	@DELETE
	public String delete(@PathParam("id") String id)
	{
		System.out.println("delete id="+id);
		return id;
	}
}

启动Tomcat

mvn tomcat7:run

使用Postman测试