如何用Java实现简单聊天机器人

创建数据库和表，准备表数据（MySQL）

首先创建一个数据库android
然后创建一个表dictionary，字段：

id int
receive varchar(100)
response varchar(100)

receive 表示受到的信息
response 表示回应的信息

create database android;

use android;

create table dictionary(
   id int AUTO_INCREMENT,
   receive varchar(100),
   response varchar(100),
   PRIMARY KEY (id)
)  DEFAULT CHARSET=utf8;

insert into dictionary values(null,'你好','好你妹！');
insert into dictionary values(null,'你叫什么','你想泡我啊？');
insert into dictionary values(null,'你叫什么','同志，不约');
insert into dictionary values(null,'打你哦','来啊，来打我啊');

对象设置（ORM）

对象关系映射，设置对象对应数据库中的各字段。

package socket;

public class Dictionary {
    public int id;
    public String receive;  // 接收
    public String response; // 回应
}

数据访问对象（DAO）

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package socket;

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.ArrayList;
import java.util.List;

public class DictionaryDAO {

    public DictionaryDAO() {
        try {
            Class.forName("com.mysql.jdbc.Driver");
        } catch (ClassNotFoundException e) {
            e.printStackTrace();
        }
    }

    public Connection getConnection() throws SQLException {
        return DriverManager.getConnection("jdbc:mysql://127.0.0.1:3306/android?characterEncoding=UTF-8", "root",
                "admin");
    }

    public List query(String recieve) {
        List ds = new ArrayList();

        String sql = "select * from dictionary where receive = ? ";

        try (Connection c = getConnection(); PreparedStatement ps = c.prepareStatement(sql);) {
            ps.setString(1, recieve);
            ResultSet rs = ps.executeQuery();
            while (rs.next()) {
                Dictionary d = new Dictionary();
                int id = rs.getInt(1);
                String receive = rs.getString("receive");
                String response = rs.getString("response");
                d.id = id;
                d.receive = receive;
                d.response = response;
                ds.add(d);
            }
        } catch (SQLException e) {

            e.printStackTrace();
        }
        return ds;
    }
}

此处，如果不是代码编写问题，出现jdbc错误，请注意是否打开MySQL数据库。

server端

主要是正常的socket入门编程。
通过输入流收到Client端发来的数据（打印），然后查询语料对话库，查到返回正常对话，查不到表示听不懂。

package socket;

import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.ServerSocket;
import java.net.Socket;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;

public class Server {

    private static List cannotUnderstand= new ArrayList<>();
    static{
        cannotUnderstand.add("听求不懂啊");
        cannotUnderstand.add("说人话");
        cannotUnderstand.add("再说一遍？");
        cannotUnderstand.add("大声点");
        cannotUnderstand.add("老子在忙，一边玩儿去");
    }
    public static void main(String[] args) {
        try {

            ServerSocket ss = new ServerSocket(8888);

            System.out.println("监听在端口号:8888");
            Socket s = ss.accept();

            InputStream is = s.getInputStream();
            DataInputStream dis = new DataInputStream(is);
            OutputStream os = s.getOutputStream();
            DataOutputStream dos = new DataOutputStream(os);

            while (true) {
                String msg = dis.readUTF();
                System.out.println(msg);

                List ds= new DictionaryDAO().query(msg);
                String response = null;
                if(ds.isEmpty()){
                    Collections.shuffle(cannotUnderstand);
                    response = cannotUnderstand.get(0);
                }
                else{
                    Collections.shuffle(ds);
                    response = ds.get(0).response;
                }
                dos.writeUTF(response);
            }

        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }

    }
}

Client端

正常的收发信息

package socket;

import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.Socket;
import java.net.UnknownHostException;
import java.util.Scanner;

public class Client {
    public static void main(String[] args) {
        try {
            // 连接到本机的8888端口
            Socket s = new Socket("127.0.0.1", 8888);
            //
            OutputStream os = s.getOutputStream();
            DataOutputStream dos = new DataOutputStream(os);
            InputStream is = s.getInputStream();
            DataInputStream dis = new DataInputStream(is);

            while (true) {
                Scanner sc = new Scanner(System.in);
                String str = sc.next();
                dos.writeUTF(str);
                String msg = dis.readUTF();
                System.out.println(msg);
            }
        } catch (UnknownHostException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}