Maven+jersey快速构建RESTful Web service集成mongodb-短小而精悍-值得拥有

浏览数：56 / 时间：2015年06月12日

源码下载地址：http://pan.baidu.com/s/1gdIN4fp

转载请注明原著地址：http://blog.csdn.net/tianyijavaoracle/article/details/41708217

Jersey是JAX-RS(JSR311)开源参考实现用于构建RESTful Web service。此外Jersey还提供一些额外的API和扩展机制,所以开发人员能够按照自己的需要对Jersey进行扩展

理论的东西在这里我就不多说了！这个实例是实现了REST的三个基本get、put、delete功能，数据存储在mongo里。下面的截图是整个工程的目录结构

工程入口是App.java 里的main,

运行结果如下图：运行app类中入口后，程序监听8080端口，大家会发现，我们不需要tomcat等web容器即可轻松创建web服务，简洁快速。

下面这张图是运行完TestClient测试客户端的输出结果，增删改查输出结果

下面这张图是运行添加数据后，mongo中添加成功的数据。

下面我来依依列出代码

一、maven的pom.xml代码如下：

<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.example</groupId>
	<artifactId>jerseyUserDemo</artifactId>
	<packaging>war</packaging>
	<version>0.0.1-SNAPSHOT</version>
	<name>jerseyUserDemo Maven Webapp</name>
	<url>http://maven.apache.org</url>
	<repositories>
		<repository>
			<id>snapshot-repository.java.net</id>
			<name>Java.net Snapshot Repository for Maven</name>
			<url>https://maven.java.net/content/repositories/snapshots/</url>
			<layout>default</layout>
		</repository>
		<repository>
			<id>spring.test-mvc</id>
			<url>http://repo.springsource.org/libs-milestone</url>
		</repository>
		<repository>
			<id>repo1</id>
			<name>repo1</name>
			<url>http://repo1.maven.org/maven2</url>
		</repository>
		<repository>
			<id>jboss-cache</id>
			<name>jboss-cache</name>
			<url>http://repository.jboss.org/maven2</url>
		</repository>
		<repository>
			<id>mvnsearch</id>
			<name>mvnsearch Maven Repository</name>
			<url>http://www.mvnsearch.org/maven2</url>
		</repository>
		<repository>
			<id>ibiblio</id>
			<name>ibiblio Maven Repository</name>
			<url>http://www.ibiblio.org/maven2</url>
		</repository>
		<repository>
			<id>mirrors.ibiblio</id>
			<name>mirrors.ibiblio Maven Repository</name>
			<url>http://mirrors.ibiblio.org/pub/mirrors/maven2</url>
		</repository>
	</repositories>
	<dependencies>
		<!-- Tomcat Servlet API -->
		<dependency>
			<groupId>javax.servlet</groupId>
			<artifactId>javax.servlet-api</artifactId>
			<version>3.1.0</version>
		</dependency>

		<dependency>
			<groupId>org.glassfish.jersey.containers</groupId>
			<artifactId>jersey-container-grizzly2-servlet</artifactId>
			<version>2.13</version>
		</dependency>

		<dependency>
			<groupId>org.glassfish.jersey.containers</groupId>
			<artifactId>jersey-container-servlet-core</artifactId>
			<version>2.13</version>
		</dependency>
		<dependency>
			<groupId>org.glassfish.jersey.media</groupId>
			<artifactId>jersey-media-json-jackson</artifactId>
			<version>2.13</version>
		</dependency>
		<!-- Required only when you are using JAX-RS Client -->
		<dependency>
			<groupId>org.glassfish.jersey.core</groupId>
			<artifactId>jersey-client</artifactId>
			<version>2.13</version>
		</dependency>
		<!-- mongodb -->
		<dependency>
			<groupId>org.mongodb</groupId>
			<artifactId>mongo-java-driver</artifactId>
			<version>2.12.4</version>
		</dependency>


	</dependencies>
	<build>
		<finalName>jerseyUserDemo</finalName>
	</build>
</project>

二、User实体类代码如下

package model;

import java.io.Serializable;

 
public class User  implements Serializable{

	/**
	 * 
	 */
	private static final long serialVersionUID = 1L;
	private String id;
	private String userName;
	private String phone;
	public User(){}
	public User(String id, String userName, String phone) {
		super();
		this.id = id;
		this.userName = userName;
		this.phone = phone;
	}
	public String getId() {
		return id;
	}
	public void setId(String id) {
		this.id = id;
	}
	public String getUserName() {
		return userName;
	}
	public void setUserName(String userName) {
		this.userName = userName;
	}
	public String getPhone() {
		return phone;
	}
	public void setPhone(String phone) {
		this.phone = phone;
	} 
	@Override
	public String toString() {
		return "User [id=" + id + ", userName=" + userName + ", phone=" + phone +   "]";
	}
	@Override
	public int hashCode() {
		final int prime = 31;
		int result = 1;
		result = prime * result + ((id == null) ? 0 : id.hashCode());
		return result;
	}
	@Override
	public boolean equals(Object obj) {
		if (this == obj)
			return true;
		if (obj == null)
			return false;
		if (getClass() != obj.getClass())
			return false;
		User other = (User) obj;
		if (id == null) {
			if (other.id != null)
				return false;
		} else if (!id.equals(other.id))
			return false;
		return true;
	}

}

三、UserResource类代码如下，这里制定了访问的路径。

package resource;

import java.util.List;

import javax.inject.Singleton;
import javax.ws.rs.Consumes;
import javax.ws.rs.DELETE;
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 model.User;
import service.UserService;

@Singleton
@Path("/users")
public class UserResource {

	@GET
	@Produces({ "application/json", "application/xml" })
	public List<User> getMyResources() {
		List<User> users = UserService.getUsers(); 
		return users;
	}

	@GET
	@Path("/list")
	@Produces({ "application/json", "application/xml" })
	public List<User> getListOfUsers() {
		List<User> users = UserService.getUsers(); 
		return users;
	}

	@GET
	@Path("/{id}")
	@Produces({ "application/json" })
	public User getUser(@PathParam("id") String id) { 
		User u=UserService.getUserById(id);
		return u;
	}

	@PUT
	//@Path("/ids/{id}")
	@Consumes({ "application/json", "application/xml" })
	public void putUser(User user) {

		UserService.updateUser(user); 

	}
	@POST
	//@Path("/ids/{id}")
	@Consumes({ "application/json", "application/xml" })
	public void postUser(User user) {

		UserService.addUser(user); 

	}
	@DELETE
	@Path("/{id}")
	public void deleteUser(@PathParam("id") String id) { 
		UserService.delUserById(id);
	}

}

四、MyApplication类，通过将UserResourcer加载到应用中

package main;

import java.util.HashSet;
import java.util.Set;

import javax.ws.rs.ApplicationPath;
import javax.ws.rs.core.Application;

import resource.UserResource;

/**
 * @author Pavel Bucek (pavel.bucek at oracle.com)
 */
@ApplicationPath("/")
public class MyApplication extends Application {
    @Override
    public Set<Class<?>> getClasses() {
        final Set<Class<?>> classes = new HashSet<Class<?>>();
        // register root resource
        classes.add(UserResource.class);
        return classes;
    }
}

五、App类是整个工程的入口，通过运行该类中的main函数启动即可

启动后可以通过运行TestClient类中的客户端测试代码进行测试。我继续贴代码。

代码如下：

package main;

import java.io.IOException;
import java.net.URI;
import java.util.HashMap;
import java.util.Map;
import java.util.logging.Level;
import java.util.logging.Logger;

import org.glassfish.grizzly.http.server.HttpServer;
import org.glassfish.jersey.grizzly2.servlet.GrizzlyWebContainerFactory;
import org.glassfish.jersey.server.ServerProperties;
import org.glassfish.jersey.servlet.ServletContainer;

import resource.UserResource;

/**
 * @author Pavel Bucek (pavel.bucek at oracle.com)
 */
public class App {

    private static final URI BASE_URI = URI.create("http://localhost:8080/webapp/");
    public static final String ROOT_PATH = "users";

    public static void main(String[] args) {
        try {
       
            Map<String, String> initParams = new HashMap<String, String>();
            initParams.put(ServerProperties.PROVIDER_PACKAGES,  UserResource.class.getPackage().getName());
            
            final HttpServer server = GrizzlyWebContainerFactory.create(BASE_URI, ServletContainer.class, initParams);

            System.out.println(String.format("Application started.%nTry out %s%s%nHit enter to stop it...",
                    BASE_URI, ROOT_PATH));
            System.in.read();
            server.shutdownNow();
        } catch (IOException ex) {
            Logger.getLogger(App.class.getName()).log(Level.SEVERE, null, ex);
        }
    }
}

六、TestClient测试客户端代码：

package client;

import javax.ws.rs.client.Client;
import javax.ws.rs.client.ClientBuilder;
import javax.ws.rs.client.Entity;
import javax.ws.rs.client.WebTarget;
import javax.ws.rs.core.MediaType;
import javax.ws.rs.core.Response;

import model.User;

import com.fasterxml.jackson.jaxrs.json.JacksonJsonProvider;
/**
 * 
 * @author zhongtianyi
 *
 */
public class TestClient {

	private static String serverUri = "http://localhost:8080/webapp";

	/**
	 * @param args
	 */
	public static void main(String[] args) {
		User user = new User("006", "tianyi", "12355123891");
		addUser(user);
		getAllUsers();
		user = new User("006", "tianyi", "33");
		String id = user.getId();
		updateUser(user);
		getUserById(id);
		getAllUsers();
		delUser(id);
		getAllUsers();

	}

	/**
	 * 添加用户
	 */
	private static void addUser(User user) {
		System.out.println("****增加用户addUser****");

		Client client = ClientBuilder.newClient();
		WebTarget target = client.target(serverUri + "/users");
		Response response = target.request()
				.buildPost(Entity.entity(user, MediaType.APPLICATION_JSON))
				.invoke();
		response.close();
	}

	/**
	 * 删除用户
	 */
	private static void delUser(String id) {
		System.out.println("****删除用户****");
		Client client = ClientBuilder.newClient();
		WebTarget target = client.target(serverUri + "/users/" + id);
		Response response = target.request().delete();
		response.close();
	}

	/**
	 * 修改用户
	 */
	private static void updateUser(User user) {
		System.out.println("****修改用户updateUser****");

		Client client = ClientBuilder.newClient();
		WebTarget target = client.target(serverUri + "/users");
		Response response = target.request()
				.buildPut(Entity.entity(user, MediaType.APPLICATION_JSON))
				.invoke();
		response.close();
	}

	/**
	 * 根据id查询用户
	 */
	private static void getUserById(String id) {
		System.out.println("****根据id查询用户****");
		Client client = ClientBuilder.newClient().register(
				JacksonJsonProvider.class);// 注册json 支持
		WebTarget target = client.target(serverUri + "/users/" + id);
		Response response = target.request().get();
		User user = response.readEntity(User.class);
	 	System.out.println(user.getId() + user.getUserName());
		response.close();
	}

	/**
	 * 查询所有用户
	 */
	private static void getAllUsers() {
		System.out.println("****查询所有getAllUsers****");

		Client client = ClientBuilder.newClient();

		WebTarget target = client.target(serverUri + "/users");
		Response response = target.request().get();
		String value = response.readEntity(String.class);
		System.out.println(value);
		response.close(); // 关闭连接
	}

}

七、其他代码

package utils;
 
import java.util.ArrayList; 
import java.util.List;

import model.User;

import com.mongodb.BasicDBList;
import com.mongodb.BasicDBObject;
import com.mongodb.DB;
import com.mongodb.DBCollection;
import com.mongodb.DBCursor;
import com.mongodb.DBObject;
import com.mongodb.Mongo;
import com.mongodb.MongoOptions;
import com.mongodb.ServerAddress;

public class MongoDBUtils {

	public static Mongo mongo = null;

	public static DB db = null;
	private static String dbName = "UserAdmin";
	private static String mongodbServerAddress = "127.0.0.1:2005";
	private static String colName = "User";

	public static DBCollection getDBCollection() {
		try {
			if (mongo == null) {
				 
				List<ServerAddress> addList = new ArrayList<ServerAddress>();
				String[] addrs = mongodbServerAddress.split(";");
				for (String address : addrs) {
					ServerAddress addr = new ServerAddress(address);
					addList.add(addr);
				}
			 	mongo = new Mongo(addList); 
				// mongodb连接池数
				MongoOptions opt = mongo.getMongoOptions();
				opt.connectionsPerHost = 400;
				opt.threadsAllowedToBlockForConnectionMultiplier = 20;
				opt.maxWaitTime = 5000;
				opt.socketTimeout = 0;
				opt.connectTimeout = 15000;

			}

			if (db == null) {
				db = mongo.getDB(dbName);
			}

		} catch (Exception e) {

		}
		return db.getCollection(colName);
	}

	public static User findUserByID(String id) {

		DBCollection coll = null;
	 
		coll = getDBCollection();

	 
		DBCursor cur = coll.find(new BasicDBObject("id", id));
		User user = new User();
		if (cur.size() > 0) {

			while (cur.hasNext()) {

				DBObject o = (DBObject) cur.next();

				String userName = o.get("username").toString();

				String phone = o.get("phone").toString();
				user.setId(id);
				user.setPhone(phone);
				user.setUserName(userName);
			}
		}

		return user;
	}

	public static List<User>  findUsers() {

		DBCollection coll = null;
		DBObject queryType = null;

		coll = getDBCollection();

		List<User> users=new ArrayList<User>();
		DBCursor cur = coll.find();
		
		if (cur.size() > 0) {

			while (cur.hasNext()) {
				User user = new User();
				DBObject o = (DBObject) cur.next();

				String id = o.get("id").toString();
				String userName = o.get("username").toString();

				String phone = o.get("phone").toString();
				user.setId(id);
				user.setPhone(phone);
				user.setUserName(userName);
				users.add(user);
			}
		}

		return users;
	}
	
	public static void removeByID(String value) {

		DBCollection coll = null;
		try {
			coll = getDBCollection();
			coll.remove(new BasicDBObject().append("id", value));
		} catch (Exception e) {

		}

	}

	public static void insertUserData(User user) {

		DBCollection dbCol = null;
		try {
			dbCol = getDBCollection();

			List<DBObject> dbList = new ArrayList<DBObject>();
			BasicDBObject subscribe = new BasicDBObject();

			subscribe.put("id", user.getId());
			subscribe.put("username", user.getUserName());
			subscribe.put("phone", user.getPhone());

			dbList.add(subscribe);
			dbCol.insert(dbList);
		} catch (Exception e) {

		}
	}

	public static void updateByUser(User user) {

		DBCollection coll = null;
		try {
			coll = getDBCollection();

			BasicDBObject newDocument3 = new BasicDBObject().append("$set",
					new BasicDBObject().append("username", user.getUserName())
					.append("phone", user.getPhone()));

			coll.update(new BasicDBObject().append("id", user.getId()), newDocument3);

		} catch (Exception e) {

		}

	}

	public static void close() {
		try {
			if (mongo != null) {
				mongo.close();
			}
		} catch (Exception e) {
			e.printStackTrace();
		}

	}
}

package service;

import java.util.List;

import dao.UserDao;
import model.User;

public class UserService {

	public static User  getUserById(String id) {

		return UserDao.getUserById(id);
	}

	public  static List<User> getUsers() {

		return UserDao.getUsers();
	}

	public static void delUserById(String id) {
		UserDao.delUserById(id);
	}

 

	public static void addUser(User user) {
		 
		UserDao.addUser(user);
	}

	public static void updateUser(User user) {
		 
		UserDao.updateUser(user);
	}
	
}

package dao;

import java.util.ArrayList;
import java.util.List;

import utils.MongoDBUtils;
import model.User;

public class UserDao {

	private UserDao() {
	}

	private static List<User> users = new ArrayList<User>();

	public static void addUser(User u) {
		//users.add(u);
		MongoDBUtils.insertUserData(u);
	}

	public static User getUserById(String id) {
		return MongoDBUtils.findUserByID(id);
		/*for (User u : users) {
			if (u.getId().equals(id)) {
				return u;
			}
		}
		return null;*/

	}

	public static List<User> getUsers() {
		return MongoDBUtils.findUsers();
	}

	public static void delUserById(String id) {
		MongoDBUtils.removeByID(id);
		/*User user = null;
		for (User u : users) {
			if (u.getId().equals(id)) {
				user = u;
			}
		}

		if (user != null) {
			users.remove(user);
		}*/
	}

	public static void updateUser(User user) {
/*
		for (User u : users) {
			if (u.getId().equals(user.getId())) {
				u.setUserName(user.getUserName());
				u.setPhone(user.getPhone());
			}
		}*/
		MongoDBUtils.updateByUser(user);

	}

	 

}

运行结果如下图：运行app类中入口后，程序监听8080端口，大家会发现，我们不需要tomcat等web容器即可轻松创建web服务，简洁快速。

下面这张图是运行完TestClient测试客户端的输出结果，增删改查输出结果

下面这张图是运行添加数据后，mongo中添加成功的数据。

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Maven+jersey快速构建RESTful Web service集成mongodb-短小而精悍-值得拥有