马心宇的博客

editor.ui.registry.addSplitButton('myButtonWebPrinter', { text: 'WebPrinter', icon: ' ', tooltip: 'This is an example split-button', ...

if (m_list.GetSelectedCount() > 0) {POSITION pos= m_list.GetFirstSelectedItemPosition();while (pos){ int nSelected = m_list.GetNextSelectedItem(pos); //获取选中行的索引 m_list.DeleteItem(nSelected); //根据索引删除 pos = m_list.GetFirstSelectedItemP

@desc API 统一返回状态码 /* 用户错误：20001-29999*/ USER_HAS_EXISTED(20005, “用户已存在”),没有合适的MySQL JDBC驱动 No suitable driver found for localhostMybatis不鼓励捕捉异常，但在某些特定场景下需要捕捉，这个时候通过try catch是捕捉不到的，mybatis有自己的处理方式，它把...

修改账号状态会导致角色信息删除的问题：SELECT * FROM background.manager_role; UPDATE background.manager_role SET role_name = ‘角色未启用1’ WHERE (role_id = ‘0’);点击了修改状态按钮切换，封号状态manager_user.status=1时候导致角色重置manager_role.role...

import java.util.Scanner;public class Main { public static void main(String[] args) { Scanner input = new Scanner(System.in); while(input.hasNextInt()){ int num = inpu...

public static boolean isHuiWenShu(int num) { int max=num; int min=0; while(max!=0) { int d=max%10; max=max/10; min=10*min+d; } return num==...

import java.util.Scanner;public class Main {public static void main(String[] args) {Scanner input = new Scanner(System.in);int flag = 0, temp = 0, count = 1;for (int a = 1; a <= 100; a++) {if...

<?xml version="1.0" encoding="UTF-8"?>4.0.0org.springframework.bootspring-boot-starter-parent2.2.2.RELEASE com.mxydemo0.0.1-SNAPSHOTdemoDemo project for Spring Boot<properties&g...

如何从异常中断返回？异常中断处理程序结构什么样？何为异常中断向量表？哪一种异常中断优先级最高？

su - rootuseradd tompasswd tomuseradd marypasswd marysu - tomcd homevi secret.txttrycp /home/mary#no<-exitusermod -G tom ,mary tomtrysu - tomcp secret.txt /home/marysu - marychmod...

用户和用户组管理目录1 组管理 21.1 新建组与系统组 21.2 更改组名和组ID 21.3 删除组 21.4 切换用户组 22 用户管理 22.1 新建用户定制参数 22.2 新建系统用户 32.3 修改用户相关备注信息 32.4 修改用户账户过期时间 32.5 锁定用户并解锁 32.6 更改用户主目录（家目录） 32.7 更改用户相关备注信息 32.8 查看用户...

Hello world!

set serveroutput ondeclear vname %type; vsal %type; a integer; b integer;begin a:=&150; b:=&550; select firstname,salary into vname,vsal from employees where employee_id=a or employ...

create or replaceTRIGGER trg_secure_empbefore INSERT OR UPDATE OR DELETEON employeesBEGIN IF TO_CHAR (SYSDATE, 'HH24:MI') NOT BETWEEN '08:00' AND '12:00' THEN RAISE_APPLICATION_ERROR(-200...

CREATE OR REPLACE PROCEDURE proc_return_deptinfo(p_deptno employees.department_id%TYPE,p_avgsal OUT employees.salary%TYPE,p_count OUT NUMBER)ASBEGINSELECT avg(salary),count(*) INTO p_avgsal,p_c...

1、*.tar 用 tar –xvf 解压2、*.gz 用 gzip -d或者gunzip 解压3、*.tar.gz和*.tgz 用 tar –xzf 解压4、*.bz2 用 bzip2 -d或者用bunzip2 解压5、*.tar.bz2用tar –xjf 解压6、*.Z 用 uncompress 解压7、*.tar.Z 用tar –xZf 解压8、*.rar 用 unrar e解...

给多个用户发送邮件，多个收件人之间用空格隔开 mail tom1 tom2 tom3 < file1.txt mail -s “test” tom1 tom2 tom3 < file1.txt

＃!/bin/bash ＃script_cp1 ＃ echo -e "input a file name in the current directory:\c" read FILE echo ${FILE:?"you must input a file name,please try again"}cp $FILE ${FILE}_bak vi $FI...

举例echo -n “hi”echo -e “hi\c”echo “a\tb”echo -e “a\tb”echo -e “a\nb”vi fileecho "input a number:" #echo -e "input a number:_\b\c" read a echo "$a" 保存文件 chmod 700 f...

···@shell#!/bin/bash#largest_testechoecho -e “please input three numbers and I will show you the largest of them:\c”read N1 N2 N3echo $N1 $N2 N3iftest“N3if test “N3iftest“N1” -ge “N2”th...