技术标签: 项目
实体类
package com.stage3.haungzixiao.exam1.entity;
public class Player {
private Integer id; //玩家ID
private String name; //玩家名称
private Integer level; //玩家等级
private String game;//游戏名称
private String time;//注册时间
private Integer status;//账号状态 0封号 1正常
public Player() {
}
public Player(String name, Integer level, String game, String time, Integer status) {
this.name = name;
this.level = level;
this.game = game;
this.time = time;
this.status = status;
}
public Player(Integer id, String name, Integer level, String game, String time, Integer status) {
this.id = id;
this.name = name;
this.level = level;
this.game = game;
this.time = time;
this.status = status;
}
public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public Integer getLevel() {
return level;
}
public void setLevel(Integer level) {
this.level = level;
}
public String getGame() {
return game;
}
public void setGame(String game) {
this.game = game;
}
public String getTime() {
return time;
}
public void setTime(String time) {
this.time = time;
}
public Integer getStatus() {
return status;
}
public void setStatus(Integer status) {
this.status = status;
}
@Override
public String toString() {
return "Player{" +
"id=" + id +
", name='" + name + '\'' +
", level=" + level +
", game='" + game + '\'' +
", time='" + time + '\'' +
", status=" + status +
'}';
}
}
package com.stage3.haungzixiao.exam1.dao;
import com.stage3.haungzixiao.exam1.entity.Player;
import com.stage3.haungzixiao.exam1.util.DBUtils;
import org.apache.commons.dbutils.QueryRunner;
import org.apache.commons.dbutils.handlers.BeanHandler;
import org.apache.commons.dbutils.handlers.BeanListHandler;
import java.sql.SQLException;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.List;
public class PlayerDao {
private QueryRunner queryRunner = new QueryRunner(DBUtils.getDataSource());
/**
* 按照添加查询
* @param game 游戏名
* @param name 玩家姓名
* @param startTime 起始时间
* @param endTime 结束时间
* @param status 状态
* @return
*/
public List<Player> getPlayerList(String game,String name,String startTime,String endTime,Integer status){
String sql = "select id,name,level,game,`time`,status from tgame where 1=1 ";
List param = new ArrayList();
if(game!=null){
sql += " and game=? ";
param.add(game);
}
if(name!=null){
sql += " and name=? ";
param.add(name);
}
if(startTime!=null){
sql += "and `time`>? ";
param.add(startTime);
}
if(endTime!=null){
sql += " and `time`<? ";
param.add(endTime);
}
if(status!=null){
sql += " and status=? ";
param.add(status);
}
try {
return queryRunner.query(sql,new BeanListHandler<>(Player.class),param.toArray());
} catch (SQLException e) {
e.printStackTrace();
}
return null;
}
/**
* 获取所有游戏名称
* @return
*/
public List<Player> getGame(){
String sql = "select distinct game from tgame";
try {
return queryRunner.query(sql,new BeanListHandler<>(Player.class));
} catch (SQLException e) {
e.printStackTrace();
}
return null;
}
/**
* 添加玩家
* 时间自动获取当前系统时间
* @param player
* @return
*/
public int addPlayer(Player player){
String sql = "insert into tgame(name,level,game,`time`,status) values(?,?,?,?,?)";
try {
return queryRunner.update(sql,player.getName(),player.getLevel(),player.getGame(),player.getTime(),player.getStatus());
} catch (SQLException e) {
e.printStackTrace();
}
return 0;
}
/**
* 根据id查询一个玩家
* @param id
* @return
*/
public Player getPlayerById(Integer id){
String sql = "select id,name,level,game,`time`,status from tgame where id=?";
try {
return queryRunner.query(sql,new BeanHandler<>(Player.class),id);
} catch (SQLException e) {
e.printStackTrace();
}
return null;
}
/**
* 修改玩家
* @param player
* @return
*/
public int updatePlay(Player player){
String sql = "update tgame set name=?,level=?,game=?,`time`=?,status=? where id=?";
try {
return queryRunner.update(sql,player.getName(),player.getLevel(),player.getGame(),player.getTime(),player.getStatus(),player.getId());
} catch (SQLException e) {
e.printStackTrace();
}
return 0;
}
public int deletePlayer(Integer id){
String sql = "delete from tgame where id=?";
try {
return queryRunner.update(sql,id);
} catch (SQLException e) {
e.printStackTrace();
}
return 0;
}
}
package com.stage3.haungzixiao.exam1.service;
import com.stage3.haungzixiao.exam1.dao.PlayerDao;
import com.stage3.haungzixiao.exam1.entity.Player;
import java.util.List;
public class PlayerService {
/**
* 按照条件查询
*
* @return
*/
public List<Player> getPlayerList(String game, String name, String startTime, String endTime, Integer status) {
PlayerDao playerDao = new PlayerDao();
return playerDao.getPlayerList(game, name, startTime, endTime, status);
}
public List<Player> getGame() {
PlayerDao playerDao = new PlayerDao();
return playerDao.getGame();
}
public int addPlay(Player player) {
PlayerDao playerDao = new PlayerDao();
return playerDao.addPlayer(player);
}
public Player getPlayerById(Integer id) {
PlayerDao playerDao = new PlayerDao();
return playerDao.getPlayerById(id);
}
public int updatePlay(Player player) {
PlayerDao playerDao = new PlayerDao();
return playerDao.updatePlay(player);
}
public int deletePlayer(Integer id) {
PlayerDao playerDao = new PlayerDao();
return playerDao.deletePlayer(id);
}
}
package com.stage3.haungzixiao.exam1.servlet;
import com.stage3.haungzixiao.exam1.entity.Player;
import com.stage3.haungzixiao.exam1.service.PlayerService;
import com.stage3.haungzixiao.exam1.util.ParameterUtil;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
@WebServlet(name = "PlayerListServlet", urlPatterns = "/playerList")
public class PlayerListServlet extends HttpServlet {
private PlayerService playerService = new PlayerService();
@Override
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
String game = ParameterUtil.getString(request,"game");
String name = ParameterUtil.getString(request,"name");
String startTime = ParameterUtil.getString(request,"startTime");
String endTime = ParameterUtil.getString(request,"endTime");
Integer status = ParameterUtil.getInteger(request,"status");
List<Player> playerList=null;
List<Player> gameName=null;
System.out.println(game+name+startTime+endTime+status);
playerList = playerService.getPlayerList(game,name,startTime,endTime,status);
// for (Player player : playerList) {
// System.out.println(player);
// }
gameName = playerService.getGame();
System.out.println(gameName);
request.setAttribute("playerList",playerList);
request.setAttribute("gameName",gameName);
request.getRequestDispatcher("playerList.jsp").forward(request,response);
}
@Override
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
doPost(request, response);
}
}
package com.stage3.haungzixiao.exam1.servlet;
import com.stage3.haungzixiao.exam1.entity.Player;
import com.stage3.haungzixiao.exam1.service.PlayerService;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.util.List;
@WebServlet(name = "GameNameServlet", urlPatterns = "/toadd")
public class GameNameServlet extends HttpServlet {
private PlayerService playerService = new PlayerService();
@Override
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
List<Player> gameName = playerService.getGame();
request.setAttribute("gameName",gameName);
request.getRequestDispatcher("addPlayer.jsp").forward(request,response);
}
@Override
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
doPost(request, response);
}
}
package com.stage3.haungzixiao.exam1.servlet;
import com.stage3.haungzixiao.exam1.entity.Player;
import com.stage3.haungzixiao.exam1.service.PlayerService;
import com.stage3.haungzixiao.exam1.util.ParameterUtil;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.util.List;
@WebServlet(name = "ToUpdatePlayerServlet", urlPatterns = "/toupdate")
public class ToUpdatePlayerServlet extends HttpServlet {
private PlayerService playerService = new PlayerService();
@Override
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
Integer id = ParameterUtil.getInteger(request,"id");
Player player = playerService.getPlayerById(id);
List<Player> gameName = playerService.getGame();
request.setAttribute("player",player);
request.setAttribute("gameName",gameName);
request.getRequestDispatcher("updatePlayer.jsp").forward(request,response);
}
@Override
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
doPost(request, response);
}
}
package com.stage3.haungzixiao.exam1.servlet;
import com.stage3.haungzixiao.exam1.entity.Player;
import com.stage3.haungzixiao.exam1.service.PlayerService;
import com.stage3.haungzixiao.exam1.util.ParameterUtil;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
@WebServlet(name = "UpdatePlayerServlet", urlPatterns = "/update")
public class UpdatePlayerServlet extends HttpServlet {
private PlayerService playerService = new PlayerService();
@Override
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
System.out.println("更新");
Integer id = ParameterUtil.getInteger(request,"id");
String name = ParameterUtil.getString(request,"name");
String game = ParameterUtil.getString(request,"game");
Integer level = ParameterUtil.getInteger(request,"level");
String time = ParameterUtil.getString(request,"time");
Integer status = ParameterUtil.getInteger(request,"status");
Player player = new Player(id,name,level,game,time,status);
System.out.println(player);
int res = playerService.updatePlay(player);
response.sendRedirect("playerList");
}
@Override
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
doPost(request, response);
}
}
package com.stage3.haungzixiao.exam1.servlet;
import com.stage3.haungzixiao.exam1.service.PlayerService;
import com.stage3.haungzixiao.exam1.util.ParameterUtil;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
@WebServlet(name = "DeletePlayerServlet", urlPatterns = "/delete")
public class DeletePlayerServlet extends HttpServlet {
private PlayerService playerService = new PlayerService();
@Override
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
Integer id = ParameterUtil.getInteger(request,"id");
int res = playerService.deletePlayer(id);
response.sendRedirect("playerList");
}
@Override
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
doPost(request, response);
}
}
package com.stage3.haungzixiao.exam1.servlet;
import com.stage3.haungzixiao.exam1.entity.Player;
import com.stage3.haungzixiao.exam1.service.PlayerService;
import com.stage3.haungzixiao.exam1.util.ParameterUtil;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.lang.reflect.Parameter;
import java.util.List;
@WebServlet(name = "AddPlayerServlet", urlPatterns = "/add")
public class AddPlayerServlet extends HttpServlet {
private PlayerService playerService = new PlayerService();
@Override
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
response.setCharacterEncoding("utf-8");
response.setContentType("application/json;charset=utf-8");
String game = ParameterUtil.getString(request,"game");
String name = ParameterUtil.getString(request,"name");
Integer level = ParameterUtil.getInteger(request,"level");
String time = ParameterUtil.getString(request,"time");
Integer status = ParameterUtil.getInteger(request,"status");
System.out.println(name+level+game+time+status);
Player player = new Player(name,level,game,time,status);
int res = playerService.addPlay(player);
if(res>0){
response.getWriter().write("添加成功");
}else {
response.getWriter().write("添加失败");
}
response.sendRedirect("playerList");
}
@Override
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
doPost(request, response);
}
}
前端
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
<meta charset="UTF-8">
<title>玩家列表</title>
<link rel="stylesheet" href="css/bootstrap.min.css"></link>
<link rel="stylesheet" href="css/bootstrap-datetimepicker.css"></link>
<!-- 最新的 Bootstrap 核心 JavaScript 文件 -->
<script src="jquery-1.10.2.min.js"></script>
<script src="bootstrap.min.js"></script>
<script src="bootstrap-datetimepicker.min.js" charset="UTF-8"></script>
</head>
<body>
<div class="row">
<div class="col-lg-6">
<form action="playerList" method="post" class="form-inline" id="searchForm">
<div class="form-group">
<label>游戏</label>
<select class="form-control" name="game">
<option value="">请选择</option>
<c:forEach items="${gameName}" var="game">
<option value="${game.game}">${game.game}</option>
</c:forEach>
</select>
</div>
<div class="form-group">
<label>角色名</label>
<input type="text" class="form-control" name="name">
</div>
<div class="form-group span6">
<label>注册时间</label>
<input class="form-control" size="10" type="text" id="startTime" name="startTime"> -
<input class="form-control" size="10" type="text" id="endTime" name="endTime">
</div>
<div class="form-group">
<label>状态</label>
<select class="form-control" name="status">
<option value="">请选择</option>
<option value="1">正常</option>
<option value="0">封号</option>
</select>
</div>
<div class="form-group">
<button type="submit" class="btn">查询</button> <a href="toadd"><button type="button" class="btn btn-success">+添加</button></a>
</div>
</form>
<table class="table table-striped table-bordered" style="margin-top:20px">
<tr>
<td>角色ID</td>
<td>角色名</td>
<td>角色等级</td>
<td>所属游戏</td>
<td>注册日期</td>
<td>状态</td>
<td>操作</td>
</tr>
<c:forEach items="${playerList}" var="player">
<tr>
<td>${player.id}</td>
<td>${player.name}</td>
<td>${player.level}</td>
<td>${player.game}</td>
<td>${player.time}</td>
<c:if test="${player.status==1}">
<td>正常</td>
</c:if>
<c:if test="${player.status==0}">
<td>封号</td>
</c:if>
<td><a href="toupdate?id=${player.id}">修改</a> <a href="delete?id=${player.id}">删除</a></td>
</tr>
</c:forEach>
</table>
<ul class="pagination">
<!--不可点击的样式-->
<li class="disabled"><a href="#">首页</a></li>
<li><a href="#">上一页</a></li>
<li><a href="#">1</a></li>
<li><a href="#">2</a></li>
<!--当前页-->
<li class="active"><a href="#">3</a></li>
<li><a href="#">4</a></li>
<li><a href="#">5</a></li>
<li><a href="#">下一页</a></li>
<li><a href="#">末页</a></li>
</ul>
</div>
</div>
<script>
$(function () {
$('#startTime').datetimepicker({
format: 'yyyy-mm-dd',
autoclose: true,
minView: 2
});
$('#endTime').datetimepicker({
format: 'yyyy-mm-dd',
autoclose: true,
minView: 2
});
})
</script>
</body>
</html>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
<title>更新玩家</title>
<meta charset="UTF-8">
<link rel="stylesheet" href="css/bootstrap.min.css"></link>
<link rel="stylesheet" href="css/bootstrap-datetimepicker.css"></link>
<!-- 最新的 Bootstrap 核心 JavaScript 文件 -->
<script src="jquery-1.10.2.min.js"></script>
<script src="bootstrap.min.js"></script>
<script src="bootstrap-datetimepicker.min.js" charset="UTF-8"></script>
</head>
<body>
<div class="row">
<div class="col-lg-4">
<form action="update" method="post" id="registForm" class="form-horizontal" >
<input type="hidden" name="id" value="${player.id}">
<div class="form-group">
<label class="col-sm-2 control-label">游戏:</label>
<div class="col-sm-10">
<select class="form-control" name="game">
<option value="">请选择</option>
<c:forEach items="${gameName}" var="game">
<c:if test="${player.game==game.game}">
<option value="${game.game}" selected>${
game.game}</option>
</c:if>
<option value="${game.game}">${
game.game}</option>
</c:forEach>
</select>
</div>
</div>
<div class="form-group">
<label class="col-sm-2 control-label">角色名:</label>
<div class="col-sm-10">
<input type="text" class="form-control" value="${player.name}" name="name">
</div>
</div>
<div class="form-group">
<label class="col-sm-2 control-label">角色等级:</label>
<div class="col-sm-10">
<input type="text" class="form-control" value="${player.level}" name="level">
</div>
</div>
<div class="form-group">
<label class="col-sm-2 control-label">注册日期:</label>
<div class="col-sm-10">
<input type="text" class="form-control" value="${player.time}" readonly name="time">
</div>
</div>
<div class="form-group">
<label class="col-sm-2 control-label">状态:</label>
<div class="col-sm-10">
<c:if test="${player.status==1}">
<label class="control-label"><input type="radio" name="status" value="1" checked>正常</label>
<label class="control-label"><input type="radio" name="status" value="0">禁用</label>
</c:if>
<c:if test="${player.status==0}">
<label class="control-label"><input type="radio" name="status" value="1">正常</label>
<label class="control-label"><input type="radio" name="status" value="0" checked>禁用</label>
</c:if>
</div>
</div>
<div class="form-group">
<div class="col-sm-offset-2 col-sm-2">
<button type="submit" id="btn" class="btn btn-success">提交</button>
</div>
</div>
</form>
</div>
</div>
</body>
</html>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<%@ page import="java.text.SimpleDateFormat" %>
<%@ page import="java.util.Calendar" %>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
<meta charset="UTF-8">
<title>添加玩家</title>
<link rel="stylesheet" href="css/bootstrap.min.css"></link>
<link rel="stylesheet" href="css/bootstrap-datetimepicker.css"></link>
<!-- 最新的 Bootstrap 核心 JavaScript 文件 -->
<script src="jquery-1.10.2.min.js"></script>
<script src="bootstrap.min.js"></script>
<script src="bootstrap-datetimepicker.min.js" charset="UTF-8"></script>
</head>
<body>
<div class="row">
<div class="col-lg-4">
<form method="post" id="registForm" class="form-horizontal" action="add">
<div class="form-group">
<label class="col-sm-2 control-label">游戏:</label>
<div class="col-sm-10">
<select class="form-control" name="game">
<option value="">请选择</option>
<c:forEach items="${gameName}" var="game">
<option value="${game.game}">${
game.game}</option>
</c:forEach>
</select>
</div>
</div>
<div class="form-group">
<label class="col-sm-2 control-label">角色名:</label>
<div class="col-sm-10">
<input type="text" class="form-control" name="name">
</div>
</div>
<div class="form-group">
<label class="col-sm-2 control-label">角色等级:</label>
<div class="col-sm-10">
<input type="text" class="form-control" name="level">
</div>
</div>
<div class="form-group">
<label class="col-sm-2 control-label">注册日期:</label>
<div class="col-sm-10">
<input type="text" class="form-control" name="time" value="<%=new SimpleDateFormat("yyyy-MM-dd").format(Calendar.getInstance().getTime())%>" readonly>
</div>
</div>
<div class="form-group">
<label class="col-sm-2 control-label">状态:</label>
<div class="col-sm-10">
<label class="control-label"><input type="radio" name="status" value="1" checked>正常</label>
<label class="control-label"><input type="radio" name="status" value="0">禁用</label>
</div>
</div>
<div class="form-group">
<div class="col-sm-offset-2 col-sm-2">
<button type="submit" id="btn" class="btn btn-success">提交</button>
</div>
</div>
</form>
</div>
</div>
</body>
</html>
文章浏览阅读5.8k次。在大数据的发展当中,大数据技术生态的组件,也在不断地拓展开来,而其中的Hive组件,作为Hadoop的数据仓库工具,可以实现对Hadoop集群当中的大规模数据进行相应的数据处理。今天我们的大数据入门分享,就主要来讲讲,Hive应用场景。关于Hive,首先需要明确的一点就是,Hive并非数据库,Hive所提供的数据存储、查询和分析功能,本质上来说,并非传统数据库所提供的存储、查询、分析功能。Hive..._hive应用场景
文章浏览阅读496次。Zblog是由Zblog开发团队开发的一款小巧而强大的基于Asp和PHP平台的开源程序,但是插件市场上的Zblog采集插件,没有一款能打的,要么就是没有SEO文章内容处理,要么就是功能单一。很少有适合SEO站长的Zblog采集。人们都知道Zblog采集接口都是对Zblog采集不熟悉的人做的,很多人采取模拟登陆的方法进行发布文章,也有很多人直接操作数据库发布文章,然而这些都或多或少的产生各种问题,发布速度慢、文章内容未经严格过滤,导致安全性问题、不能发Tag、不能自动创建分类等。但是使用Zblog采._zblog 网页采集插件
文章浏览阅读2.4k次,点赞2次,收藏2次。restUI页面提交1.1 添加上传jar包1.2 提交任务job1.3 查看提交的任务2. 命令行提交./flink-1.9.3/bin/flink run -c com.qu.wc.StreamWordCount -p 2 FlinkTutorial-1.0-SNAPSHOT.jar3. 命令行查看正在运行的job./flink-1.9.3/bin/flink list4. 命令行查看所有job./flink-1.9.3/bin/flink list --all._flink定时运行job
文章浏览阅读1k次,点赞2次,收藏6次。这个项目是基于STM32的LED闪烁项目,主要目的是让学习者熟悉STM32的基本操作和编程方法。在这个项目中,我们将使用STM32作为控制器,通过对GPIO口的控制实现LED灯的闪烁。这个STM32 LED闪烁的项目是一个非常简单的入门项目,但它可以帮助学习者熟悉STM32的编程方法和GPIO口的使用。在这个项目中,我们通过对GPIO口的控制实现了LED灯的闪烁。LED闪烁是STM32入门课程的基础操作之一,它旨在教学生如何使用STM32开发板控制LED灯的闪烁。_嵌入式stm32闪烁led实验总结
文章浏览阅读63次。本文介绍了安装和部署Debezium的详细步骤,并演示了如何将Debezium服务托管到systemctl以进行方便的管理。本文将详细介绍如何安装和部署Debezium,并将其服务托管到systemctl。解压缩后,将得到一个名为"debezium"的目录,其中包含Debezium的二进制文件和其他必要的资源。注意替换"ExecStart"中的"/path/to/debezium"为实际的Debezium目录路径。接下来,需要下载Debezium的压缩包,并将其解压到所需的目录。
文章浏览阅读4.4k次。需求:在诗词曲文项目中,诗词整篇朗读的时候,文章没有读完会因为屏幕熄灭停止朗读。要求:在文章没有朗读完毕之前屏幕常亮,读完以后屏幕常亮关闭;1.权限配置:设置电源管理的权限。
文章浏览阅读2.3k次。目标检测简介、评估标准、经典算法_目标检测
文章浏览阅读6.3k次,点赞4次,收藏9次。实训时需要安装SQL server2008 R所以我上网上找了一个.exe 的安装包链接:https://pan.baidu.com/s/1_FkhB8XJy3Js_rFADhdtmA提取码:ztki注:解压后1.04G安装时Microsoft需下载.NET,更新安装后会自动安装如下:点击第一个傻瓜式安装,唯一注意的是在修改路径的时候如下不可修改:到安装实例的时候就可以修改啦数据..._sqlserver 127 0 01 无法连接
文章浏览阅读7.4k次。1. Object.keys(item); 获取到了key之后就可以遍历的时候直接使用这个进行遍历所有的key跟valuevar infoItem={ name:'xiaowu', age:'18',}//的出来的keys就是[name,age]var keys=Object.keys(infoItem);2. 通常用于以下实力中 <div *ngFor="let item of keys"> <div>{{item}}.._js 遍历对象的key
文章浏览阅读2.2w次,点赞51次,收藏310次。粒子群算法求解路径规划路径规划问题描述 给定环境信息,如果该环境内有障碍物,寻求起始点到目标点的最短路径, 并且路径不能与障碍物相交,如图 1.1.1 所示。1.2 粒子群算法求解1.2.1 求解思路 粒子群优化算法(PSO),粒子群中的每一个粒子都代表一个问题的可能解, 通过粒子个体的简单行为,群体内的信息交互实现问题求解的智能性。 在路径规划中,我们将每一条路径规划为一个粒子,每个粒子群群有 n 个粒 子,即有 n 条路径,同时,每个粒子又有 m 个染色体,即中间过渡点的_粒子群算法路径规划
文章浏览阅读353次。所谓稳健的评估指标,是指在评估的过程中数据的轻微变化并不会显著的影响一个统计指标。而不稳健的评估指标则相反,在对交易系统进行回测时,参数值的轻微变化会带来不稳健指标的大幅变化。对于不稳健的评估指标,任何对数据有影响的因素都会对测试结果产生过大的影响,这很容易导致数据过拟合。_rar 海龟
文章浏览阅读607次,点赞2次,收藏7次。–基于STM32F103ZET6的UART通讯实现一、什么是IAP,为什么要IAPIAP即为In Application Programming(在应用中编程),一般情况下,以STM32F10x系列芯片为主控制器的设备在出厂时就已经使用J-Link仿真器将应用代码烧录了,如果在设备使用过程中需要进行应用代码的更换、升级等操作的话,则可能需要将设备返回原厂并拆解出来再使用J-Link重新烧录代码,这就增加了很多不必要的麻烦。站在用户的角度来说,就是能让用户自己来更换设备里边的代码程序而厂家这边只需要提供给_value line devices connectivity line devices