服务启动出现该问题会是什么原因，代码复制文档的，solr网页中搜索正常

代码如下：

from tkinter import *
from tkinter import messagebox, Label

class Application(Frame):

    def __init__(self,master=None):
        super().__init__(master)
        self.master = master
        self.pack()
        self.createWidget()

    def createWidget(self):
        '''创建组件'''
        global photo
        photo = PhotoImage(file="imgs/timg.gif")
        label = Label(self,image=photo)
        label.pack()
        label.bind("<ButtonPress-1>",self.songhua)

    def songhua(self):
        messagebox.showinfo("送花", "送你99朵玫瑰花")

root = Tk()
root.geometry("800x400+200+300")
root.title("一个经典的GUI程序类的测试")
app = Application(master=root)
root.mainloop()

老师，您好，我想问下，为什么我运行以上代码会报 我给了2个参数给songhua()这个方法？

遇到同样的问题具体怎么操作

按照下面的回答试了很多次

老师，在Pycharm中如下得出结果为啥不是小数3.0，而是3？

b=(b)
(b)

老师好，为什么我把tank25，用pyinstaller -F,打包成exe，打包成功后，为什么没办法打开运行

老师，那个证书问题怎么解决呢。网上的方法也没解决了。

package cn.sxt.game;

import java.awt.Color;

import java.awt.Font;

import java.awt.Graphics;

import java.awt.Image;

import java.awt.event.WindowAdapter;

import java.awt.event.WindowEvent;

import javax.swing.JFrame;

/**

 * 飞机游戏的主窗口

 * @author 

 *

 */

public class MyGameFrame extends JFrame{

Image ball=GameUtil.getImage("images/ball.pang");

@Override

public void paint(Graphics g) { //自动被调用。g相当于一只画笔

Color c=g.getColor();

Font f=g.getFont();

g.setColor(Color.BLUE);

g.drawLine(100,100,300,300);

g.drawRect(100,100,300,300);

g.drawOval(100,100,300,300);

g.fillRect(100,100,40,40);

g.setColor(Color.red);

g.setFont(new Font("宋体",Font.BOLD,50));

g.drawString("我是谁？",200,200);

g.drawImage(ball, 250, 250, null);

g.setColor(c);

g.setFont(f);

}

/**

* 初始化窗口

*/

public void launchFrame() {

this.setTitle("尚学堂学院_程序猿作品");

this.setVisible(true);

this.setSize(500,500);

this.setLocation(300,300);

this.addWindowListener(new WindowAdapter() {

@Override

public void windowClosing(WindowEvent e) {

System.exit(0);

}

});

}

public static void main(String[]args) {

MyGameFrame f=new MyGameFrame();

f.launchFrame(); 

}

}

老师，我完全照抄为啥运行不出来？

Exception in thread "main" java.lang.IllegalArgumentException: input == null!

at javax.imageio.ImageIO.read(ImageIO.java:1388)

at cn.sxt.game.GameUtil.getImage(GameUtil.java:24)

at cn.sxt.game.MyGameFrame.<init>(MyGameFrame.java:19)

at cn.sxt.game.MyGameFrame.main(MyGameFrame.java:60)

package com.bjsxt;

import java.sql.Connection;

import java.sql.DriverManager;

import java.sql.SQLException;

import java.sql.Statement;

public class JdbcTest {

    //向departments表中添加一条数据

    public void insertDepartments(String department_name,int location_id){

        Connection conn = null;

        Statement state = null;

        try {

            //驱动注册

            Class.forName("com.mysql.jdbc.Driver");

            //创建连接

            conn = DriverManager.getConnection("jdbc:mysql://localhost:3306/bjsxt?useUnicode=true&characterEncoding=utf-8","root","123456");

            //执行sql

            String sql="insert into departments values(default,'"+department_name+"',"+location_id+")";

            state = conn.createStatement();

            int falg = state.executeUpdate(sql);

            System.out.println(falg);

        } catch (Exception e) {

            e.printStackTrace();

        }finally {

            if (state !=null){

                try {

                    state.close();

                } catch (SQLException e) {

                    e.printStackTrace();

                }

            }

        }

        if (conn !=null){

            try {

                conn.close();

            } catch (SQLException e) {

                e.printStackTrace();

            }

        }

    }

    public static void main(String[] args) {

        JdbcTest test = new JdbcTest();

        test.insertDepartments("研发部",8);

    }

}

还在报错。

com.bjsxt;

java.sql.Connection;
java.sql.DriverManager;
java.sql.SQLException;
java.sql.Statement;

JdbcTest {
    insertDepartments(String department_name,location_id){
        Connection conn = ;
        Statement state = ;
        {
            Class.();
            conn = DriverManager.(,,);
            String sql=+department_name++location_id+;
            state = conn.createStatement();
            falg = state.executeUpdate(sql);
            System..println(falg);
        } (Exception e) {
            e.printStackTrace();
        }{
            (state !=){
                {
                    state.close();
                } (SQLException e) {
                    e.printStackTrace();
                }
            }
        }
        (conn !=){
            {
                conn.close();
            } (SQLException e) {
                e.printStackTrace();
            }
        }
    }
    main(String[] args) {
        JdbcTest test = JdbcTest();
        test.insertDepartments(,);
    }
}

还在报错，请老师解惑。

com.bjsxt;

java.sql.Connection;
java.sql.DriverManager;
java.sql.SQLException;
java.sql.Statement;

JdbcTest {
    insertDepartments(String department_name,location_id){
        Connection conn = ;
        Statement state = ;
        {
            Class.();
            conn = DriverManager.(,,);
            String sql=+department_name++location_id+;
            state = conn.createStatement();
            falg = state.executeUpdate(sql);
            System..println(falg);
        } (Exception e) {
            e.printStackTrace();
        }{
            (state !=){
                {
                    state.close();
                } (SQLException e) {
                    e.printStackTrace();
                }
            }
        }
        (conn !=){
            {
                conn.close();
            } (SQLException e) {
                e.printStackTrace();
            }
        }
    }
    main(String[] args) {
        JdbcTest test = JdbcTest();
        test.insertDepartments(,);
    }
}

老师：String sql="insert into departments values(default,'"+department_name+"',"+location_id+")";（逗号加了后运行还在报错）

Mon Nov 04 18:55:35 CST 2019 WARN: Establishing SSL connection without server's identity verification is not recommended. According to MySQL 5.5.45+, 5.6.26+ and 5.7.6+ requirements SSL connection must be established by default if explicit option isn't set. For compliance with existing applications not using SSL the verifyServerCertificate property is set to 'false'. You need either to explicitly disable SSL by setting useSSL=false, or set useSSL=true and provide truststore for server certificate verification.

java.sql.SQLException: Access denied for user 'root'@'localhost' (using password: YES)

at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:965)

at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3978)

at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3914)

at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:871)

at com.mysql.jdbc.MysqlIO.proceedHandshakeWithPluggableAuthentication(MysqlIO.java:1714)

at com.mysql.jdbc.MysqlIO.doHandshake(MysqlIO.java:1224)

at com.mysql.jdbc.ConnectionImpl.coreConnect(ConnectionImpl.java:2199)

at com.mysql.jdbc.ConnectionImpl.connectOneTryOnly(ConnectionImpl.java:2230)

at com.mysql.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:2025)

at com.mysql.jdbc.ConnectionImpl.<init>(ConnectionImpl.java:778)

at com.mysql.jdbc.JDBC4Connection.<init>(JDBC4Connection.java:47)

at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)

at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)

at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)

at java.lang.reflect.Constructor.newInstance(Constructor.java:423)

at com.mysql.jdbc.Util.handleNewInstance(Util.java:425)

at com.mysql.jdbc.ConnectionImpl.getInstance(ConnectionImpl.java:386)

at com.mysql.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:330)

at java.sql.DriverManager.getConnection(DriverManager.java:664)

at java.sql.DriverManager.getConnection(DriverManager.java:247)

at com.bjsxt.JdbcTest.insertDepartments(JdbcTest.java:17)

at com.bjsxt.JdbcTest.main(JdbcTest.java:44)

请老师再帮忙检查下。

TCP不是具有保活机制吗，如果客户端断开了连接，服务端就没法收到ACK响应，这样的话

服务端不是可以在有限次数之内进行重发吗，如果达到了次数就自动断开了吗，为什么RabbitMQ是基于

TCP的但是它不会保活

老师，您看下最后一题我这思路有问题吗，如果可以的话我这代码哪出问题了

请问高老师怎么把10这个值传进去到递归算法里的阿