一、入门

controller

package com.itheima.controller;

import javax.ws.rs.GET;
import javax.ws.rs.Path;
import javax.ws.rs.Produces;
import javax.ws.rs.core.MediaType;


@Path("/person")
public class PersonResource {
	@GET
	@Produces(MediaType.TEXT_PLAIN)
	public String get(){
		return "GET Person resource";
	}
}

配置类

package com.itheima.config;

import com.itheima.controller.PersonResource;
import org.glassfish.jersey.server.ResourceConfig;


//配置类，配置这个项目有什么资源
public class ApiResourceConfig extends ResourceConfig {
	public ApiResourceConfig() {
		register(PersonResource.class);
	}
}

前端控制器配置web.xml

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_4_0.xsd"
         version="4.0">

    <servlet>
        <servlet-name>jerseyServlet</servlet-name>
        <servlet-class>org.glassfish.jersey.servlet.ServletContainer</servlet-class>
        <init-param>
            <param-name>javax.ws.rs.Application</param-name>
            <param-value>com.itheima.config.ApiResourceConfig</param-value>
        </init-param>
        <load-on-startup>1</load-on-startup>
    </servlet>
    
    <servlet-mapping>
        <servlet-name>jerseyServlet</servlet-name>
        <url-pattern>/*</url-pattern>
    </servlet-mapping>
    
</web-app>

二、注解

1、@Path

@Path("/person")
public class PersonResource {
	@GET
	@Path("{id}")
	@Produces(MediaType.TEXT_PLAIN)
	public String get(@PathParam("id") Long id){
		return "GET Person resource"+id;
	}
}

不仅支持路径参数，还支持表达式

@Path("/person")
public class PersonResource {

	@GET
	@Path("/{username: [a-zA-Z]{5,8}}")//支持正则表达式：大小写字母并且5到8个字符之间
	@Produces(MediaType.TEXT_PLAIN)
	public String getUser(@PathParam("username") String username){
		return "GET Person resource"+username;
	}
}

2、请求方式的注解

3、@Produces

@Path("/person")
//@Produces(MediaType.TEXT_PLAIN)
public class PersonResource {
	@GET
	@Path("/text")
	@Produces({"text/plain","text/html"})
	public String getTextOrHtml(){
		return "hello";
	}
}

设置Accept为text/plain或text/html

@Path("/person")
//@Produces(MediaType.TEXT_PLAIN)
public class PersonResource {
	@GET
	@Path("/text")
    //服务端指定，text/plain 品质因数为0.9
	@Produces({"text/plain; qs=0.9","text/html"})
	public String getTextOrHtml(){
		return "hello";
	}
}