Resteasy配置及其使用
resteasy秉承restful风格，它的简单已配置比使用servlet更加方便。它支持PUT 、 POST 、 GET 等常用HTTP请求方式，并且提供annotation的 Java类可配置功能将Java对象数据JSON转化。
1、访问方式
PUT POST GET （常用HTTP请求方式）2、下载资源jar包支持[如图]
3、web.xml配置
<context-param> <param-name>resteasy.resources</param-name> <param-value>com.rest.UserService</param-value> </context-param> <context-param> <param-name>resteasy.servlet.mapping.prefix</param-name> <param-value>/service</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>/services/*</url-pattern> </servlet-mapping>4、编写控制访问
package com.rest;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import javax.ws.rs.GET;
import javax.ws.rs.Path;
import javax.ws.rs.PathParam;
//import javax.ws.rs.FormParam;//获取表单参数
import javax.ws.rs.Produces;
//import javax.ws.rs.core.Context;//请求上下文HttpServletRequest
//import javax.ws.rs.QueryParam;//用于获取数据库查询参数
@Path("userservice")
public class UserService {
/**
* 初始化用户数据
*/
static Map<Integer,Object> map=new HashMap<Integer, Object>();
static{
User user1=new User("linda","623423","[email protected]",23,"female");
map.put(1, user1);
User user2=new User("veppa","734423","[email protected]",21,"male");
map.put(2, user2);
User user3=new User("nokka","973423","[email protected]",23,"female");
map.put(3, user3);
}
/**
* 获取指定Id的用户信息
* @param id
* @return
*/
@GET
@Path("user/{id}")
@Produces("application/json")
public User getById(@PathParam("id") Integer id) {
return (User) map.get(id);
}
/**
* 获取所有用户列表的JSON数据
* @return
*/
@GET
@Path("users")
@Produces("application/json")
public List<User> getUsers() {
List<User> users=new ArrayList<User>();
for(Integer index: map.keySet()){
User user=(User) map.get(index);
users.add(user);
}
return users;
}
/**
* 获取的用户传入的信息
* @param msg
* @return
*/
@GET
@Path("user/trans/{msg}")
public String getMessage(@PathParam("msg") String msg) {
return "[Hello dear! ]"+",MSG:{"+msg+"}";
}
}
5、测试
输入访问:http://localhost:8080/resteasy/services/userservice/users
打印结果： [{"email":"[email protected]","age":23,"gender":"female","name":"linda","password":"623423"},
{"email":"[email protected]","age":21,"gender":"male","name":"veppa","password":"734423"},
{"email":"[email protected]","age":23,"gender":"female","name":"nokka","password":"973423"}]