RMI example

package com.danny.rim;

import java.rmi.AlreadyBoundException;
import java.rmi.RemoteException;
import java.rmi.registry.LocateRegistry;
import java.rmi.registry.Registry;
import java.rmi.server.UnicastRemoteObject;

public class AppEntry {

	public static void main(String[] args) throws AlreadyBoundException, RemoteException {
		UserInfoImpl userInfoImpl = new UserInfoImpl();
		//Export the remote object using the specific port provided to be able to receive incoming calls.
		UserInfoInterface userInfoInterface = (UserInfoInterface)UnicastRemoteObject.exportObject(userInfoImpl,0);
		//Create and export a Registry instance on the localhost that accepts requests from the specified port
		Registry registry = LocateRegistry.createRegistry(8080);
		//Bind a remote reference to the specified name in this registry.
		registry.rebind("UserInfo", userInfoInterface);
		System.out.println("The server is ready to be called at any time.");
	}
}

package com.danny.rim;

import java.rmi.RemoteException;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

public class UserInfoImpl implements UserInfoInterface {

	public UserInfo getUserInfo() throws RemoteException {
		UserInfo userInfo = new UserInfo();
		userInfo.setUser_id("admin");
		userInfo.setUser_name("System Administrator");
		userInfo.setUser_password("888888");
		userInfo.setUser_email("[email protected]");
		userInfo.setUser_dept("Information Suggestion Center");
		return userInfo;
	}

	public String getUserName() throws RemoteException {
		return "System Administrator";
	}

	public String getUserPassword() throws RemoteException {
		return "888888";
	}

	/*
	 * Get the basic information of the user, the return value of this method is a map
	 */
	public Map<String,String> getUserInfoMap() throws RemoteException{
		Map<String,String> map = new HashMap<String, String>();
		map.put("UserId", "admin");
		map.put("UserPassword", "888888");
		return map;
	}
	
	/*
	 * Get the basic information of the user, the return value of this method is a List set of javabeans
	 */
	public List<UserInfo> getUserInfoListBean() throws RemoteException{
		List<UserInfo> list = new ArrayList<UserInfo>();
		UserInfo userOne = new UserInfo();
		userOne.setUser_id("userOne");
		userOne.setUser_name("User 111");
		userOne.setUser_password("111111");
		userOne.setUser_email("[email protected]");
		userOne.setUser_dept("Administration Department");
		list.add(userOne);
		
		UserInfo userTwo = new UserInfo();
		userTwo.setUser_id("userTwo");
		userTwo.setUser_name("用户222");
		userTwo.setUser_password("222222");
		userTwo.setUser_email("[email protected]");
		userTwo.setUser_dept("Human Resources");
		list.add(userTwo);
		
		UserInfo userThree = new UserInfo();
		userThree.setUser_id("userThree");
		userThree.setUser_name("User 333");
		userThree.setUser_password("333333");
		userThree.setUser_email("[email protected]");
		userThree.setUser_dept("Sales");
		list.add(userThree);
		return list;
	}
	
	/*
	 * Get the basic information of the user, the return value of this method is a List set of maps
	 */
	public List<Map<String,String>> getCityInfoListMap() throws RemoteException{
		List<Map<String,String>> list = new ArrayList<Map<String,String>>();
		Map<String,String> mapSY = new HashMap<String, String>();
		mapSY.put("cityName", "沈阳");
		mapSY.put("cityArea", "东北");
		list.add(mapSY);
		Map<String,String> mapBJ = new HashMap<String, String>();
		mapBJ.put("cityName", "北京");
		mapBJ.put("cityArea", "华北");
		list.add(mapBJ);
		Map<String,String> mapSH = new HashMap<String, String>();
		mapSH.put("cityName", "上海");
		mapSH.put("cityArea", "华东");
		list.add(mapSH);
		Map<String,String> mapGZ = new HashMap<String, String>();
		mapGZ.put("cityName", "广州");
		mapGZ.put("cityArea", "华南");
		list.add(mapGZ);
		Map<String,String> mapXA = new HashMap<String, String>();
		mapXA.put("cityName", "西安");
		mapXA.put("cityArea", "西北");
		list.add(mapXA);
		Map<String,String> mapCD = new HashMap<String, String>();
		mapCD.put("cityName", "成都");
		mapCD.put("cityArea", "西南");
		list.add(mapCD);
		return list;
	}
}

package com.danny.rim;

import java.io.Serializable;

public class UserInfo implements Serializable{

	private static final long serialVersionUID = 1L;

	private String user_id;
	
	private String user_name;
	
	private String user_password;
	
	private String user_email;
	
	private String user_dept;

	public String getUser_id() {
		return user_id;
	}

	public void setUser_id(String user_id) {
		this.user_id = user_id;
	}

	public String getUser_name() {
		return user_name;
	}

	public void setUser_name(String user_name) {
		this.user_name = user_name;
	}

	public String getUser_password() {
		return user_password;
	}

	public void setUser_password(String user_password) {
		this.user_password = user_password;
	}

	public String getUser_email() {
		return user_email;
	}

	public void setUser_email(String user_email) {
		this.user_email = user_email;
	}

	public String getUser_dept() {
		return user_dept;
	}

	public void setUser_dept(String user_dept) {
		this.user_dept = user_dept;
	}
}

package com.danny.rim;

import java.rmi.Remote;
import java.rmi.RemoteException;
import java.util.List;
import java.util.Map;


public interface UserInfoInterface extends Remote{

	/*
	 * Get user name
	 */
	public String getUserName() throws RemoteException;
	
	/*
	 * Get user password
	 */
	public String getUserPassword() throws RemoteException;
	
	/*
	 * Get basic user information, the return value of this method is a JavaBean
	 */
	public UserInfo getUserInfo() throws RemoteException;
	
	/*
	 * Get the basic information of the user, the return value of this method is a map
	 */
	public Map<String,String> getUserInfoMap() throws RemoteException;
	
	/*
	 * Get the basic information of the user, the return value of this method is a List set of javabeans
	 */
	public List<UserInfo> getUserInfoListBean() throws RemoteException;
	
	/*
	 * Get the basic information of the user, the return value of this method is a List set of maps
	 */
	public List<Map<String,String>> getCityInfoListMap() throws RemoteException;
}

package com.danny.rim;

import java.rmi.NotBoundException;
import java.rmi.RemoteException;
import java.rmi.registry.LocateRegistry;
import java.rmi.registry.Registry;
import java.util.List;
import java.util.Map;

public class AppTest {

	public static void main(String[] args) {
		try {
			//Returns a reference to the remote object Registry on the specified host and port. If host is null, localhost is used.
			Registry registry = LocateRegistry.getRegistry("127.0.0.1", 8080);
			//Return the remote reference bound to the specified name in the registry
			UserInfoInterface userInfoInterface = (UserInfoInterface) registry.lookup("UserInfo");
			
			System.out.println("/*****************RMI String 返回********************/");
			System.out.println("User name: " + userInfoInterface.getUserName());
			System.out.println("User Password: " + userInfoInterface.getUserPassword());
			
			System.out.println("/*****************RMI JavaBean 返回********************/");
			UserInfo userInfo = userInfoInterface.getUserInfo();
			System.out.println("User department: " + userInfo.getUser_dept());
			System.out.println("User mailbox number: " + userInfo.getUser_email());
			
			System.out.println("/****************RMI Map return ********************/" );
			Map<String,String> map = userInfoInterface.getUserInfoMap();
			System.out.println("Map user ID: " + map.get("UserId"));
			System.out.println("Map UserPassword:" + map.get("UserPassword"));
			
			System.out.println("/*****************RMI List<Object> List套JavaBean 返回********************/");
			List<UserInfo> userList = userInfoInterface.getUserInfoListBean();
			for (int i = 0; i < userList.size(); i++) {
				UserInfo users = (UserInfo)userList.get(i);
				System.out.println("User name:" + users.getUser_name() + "--department:" + users.getUser_dept() + "--mail:" + users.getUser_email());
			}
			
			System.out.println("/********************RMI List set Map return ******************** /");
			List<Map<String,String>> cityList = userInfoInterface.getCityInfoListMap();
			for (int i = 0; i < cityList.size(); i++) {
				Map<String,String> mapCity = (Map<String,String>)cityList.get(i);
				System.out.println("城市名称：" + mapCity.get("cityName") + "----区域：" + mapCity.get("cityArea"));
			}
			
		} catch (RemoteException e) {
			// TODO Auto-generated catch block
			e.printStackTrace ();
		} catch (NotBoundException e) {
			// TODO Auto-generated catch block
			e.printStackTrace ();
		}
	}
}