/*
Navicat MySQL Data Transfer
Source Server : Java实现数据库的编程
Source Server Version : 50624
Source Host : 127.0.0.1:3306
Source Database : leave
Target Server Type : MYSQL
Target Server Version : 50624
File Encoding : 65001
Date: 2019-11-07 15:42:32
*/
SET FOREIGN_KEY_CHECKS=0;
-- ----------------------------
-- Table structure for leaverecords
-- ----------------------------
DROP TABLE IF EXISTS `leaverecords`;
CREATE TABLE `leaverecords` (
`id` int(11) NOT NULL AUTO_INCREMENT COMMENT '编号',
`Name` varchar(255) NOT NULL COMMENT '姓名',
`Time` datetime NOT NULL COMMENT '请假时间',
`Reason` varchar(255) NOT NULL COMMENT '请假原因',
PRIMARY KEY (`id`)
) ENGINE=InnoDB AUTO_INCREMENT=15 DEFAULT CHARSET=utf8;
3.
下面开始写java代码：
在pojo包中新建Leave.java
package com.pojo;
import lombok.Data;
/**
* Created by ASUS on 2019/11/6.
*/
public class leave {
private int id;
private String Name;
private String Time;
private String Reason;
}
package com.service;
import com.pojo.leave;
import java.util.List;
/**
* Created by ASUS on 2019/11/6.
*/
public interface leaveService {
List findall();
int add(leave le);
int delete(int id);
int update(leave le);
leave findid(int id);
}
在service包下新建impl包，并在此包中新建LeaServiceImpl.java
package com.service;
import com.mapper.LeaveMapper;
import com.pojo.leave;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import java.util.List;
/**
* Created by ASUS on 2019/11/6.
*/
@Service("leaveService")
public class leaServiceImpl implements leaveService {
@Autowired
private LeaveMapper leaveMapper;
@Override
public List findall() {
return leaveMapper.findall();
}
@Override
public int add(leave le) {
return leaveMapper.add(le);
}
@Override
public int delete(int id) {
return leaveMapper.delete(id);
}
@Override
public int update(leave le) {
return leaveMapper.update(le);
}
@Override
public leave findid(int id) {
return leaveMapper.findid(id);
}
}
在dao包中新建接口 LeaveMapper.java
package com.mapper;
import com.pojo.leave;
import java.util.List;
/**
* Created by ASUS on 2019/11/6.
*/
public interface LeaveMapper {
List findall();
int add(leave le);
int delete(int id);
int update(leave le);
leave findid(int id);
}
在controller包中新建 LeaveController.java
package com.web;
import com.pojo.leave;
import com.service.leaveService;
import org.apache.ibatis.annotations.Param;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;
import java.util.List;
/**
* Created by ASUS on 2019/11/6.
*/
@Controller
public class leaveController {
@Autowired
private leaveService leave;
@RequestMapping("index.html")
public String findall(Model model){
List list = leave.findall();
model.addAttribute("list",list);
return "index";
}
@RequestMapping("add")
public String all(leave le){
int i= leave.add(le);
if(i>0){
System.out.println("添加成功");
return "redirect:/index.html";
}
return "index";
}
@RequestMapping("delete")
public String delete(int id){
int i = leave.delete(id);
if(i>0){
System.out.println("删除成功");
return "redirect:/index.html";
}
return "index";
}
@RequestMapping("update")
public String update(leave le){
int i = leave.update(le);
if(i>0){
System.out.println("修改成功");
return "redirect:/index.html";
}
return "index";
}
@RequestMapping("findid")
public String findid(@Param("id")int id, @Param("model") Model model){
leave lea = leave.findid(id);
model.addAttribute("lea",lea);
return "update";
}
}
insert into leaverecords(Name,Time,Reason)values(#{Name},#{Time},#{Reason})
delete from leaverecords where id=#{id}
update leaverecords set Name=#{Name},Time=#{Time},Reason=#{Reason} where id=#{id}
<%--
Created by IntelliJ IDEA.
User: ASUS
Date: 2019/10/30
Time: 15:44
To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
Title
添加学员信息
updateLeave.jsp
<%--
Created by IntelliJ IDEA.
User: ASUS
Date: 2019/11/6
Time: 15:56
To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
Title
修改学员信息
4.利用tomcat进行项目部署
下载 安装 tomcat：tomcat 9 下载地址
IDEA配置tomcat：
点击上方的 Run 选项，选择Edit Configuration
选择default -> tomcat -> local 选择下载安装到本地的tomcat服务器的地址
如果希望workflow存储最近20次的log，在session里的Config Object设置，log options做配置，save session log :sessions run ;savesessio log for these runs:20
session下面的source 里面有个tracing
今天遇到一个客户BUG，当前的jdbc连接用户是root，然后部分删除操作都会报下面这个错误：The user specified as a definer ('aaa'@'localhost') does not exist
最后找原因发现删除操作做了触发器，而触发器里面有这样一句
/*!50017 DEFINER = ''aaa@'localhost' */
原来最初
O7_DICTIONARY_ACCESSIBILITY参数控制对数据字典的访问.设置为true,如果用户被授予了如select any table等any table权限,用户即使不是dba或sysdba用户也可以访问数据字典.在9i及以上版本默认为false,8i及以前版本默认为true.如果设置为true就可能会带来安全上的一些问题.这也就为什么O7_DICTIONARY_ACCESSIBIL
#h1#
0、完成课堂例子
1、将一个四位数逆序打印
1234 ==> 4321
实现方法一：
# include <stdio.h>
int main(void)
{
int i = 1234;
int one = i%10;
int two = i / 10 % 10;
int three = i / 100 % 10;
===================================================================
第一个
===================================================================
try{
CString sql;
sql.Format("select * from p
