技术标签: spring spring mvc ssh 《Java Web/SSM/SSH实战》 ssh整合 hibernate
spring springmvc hibernate(ssh)项目整合开发---总体架构搭建
国庆觉得没啥地方想去,于是乎想自己搭建一个长期的用于练手的ssh项目(注意:这里的ssh指的是spring4 springmvc4 hibernate4),在其中融进自己学到的技术,并持续进行更新,与诸位博友共享。目前开发了一个在web项目中比较实用的邮件通信工具类,其中在这个ssh项目中主要用于:“注册成功时采用邮箱验证”与“忘记密码时通过邮件找回密码”。我觉得两个是比较实用的小模块。
好了,废话不多说,在介绍上述的两个小模块之前,毫无疑问的,得先把项目的整体架构搭建起来!项目的后端架构采用spring4 springmvc4 hibernate4,前端采用jsp、jquery、ajax。
首先先预览一下项目的总体架构图:
放入jar包,可以到这里下载:ssh整合jar包
接下来,配置web.xml,如下所示:
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns="http://java.sun.com/xml/ns/javaee"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
id="WebApp_ID" version="2.5">
<display-name>springspringmvchibernate</display-name>
<welcome-file-list>
<welcome-file>index.jsp</welcome-file>
</welcome-file-list>
<!-- spring配置文件名称与位置 -->
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:applicationContext-spring.xml</param-value>
</context-param>
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
<!-- springmvc的配置 -->
<servlet>
<servlet-name>dispatcherServlet</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:applicationContext-springmvc.xml</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>dispatcherServlet</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
<!-- 配置编码过滤器 -->
<filter>
<filter-name>characterEncodingFilter</filter-name>
<filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
<init-param>
<param-name>encoding</param-name>
<param-value>utf-8</param-value>
</init-param>
<init-param>
<param-name>forceEncoding</param-name>
<param-value>true</param-value>
</init-param>
</filter>
<filter-mapping>
<filter-name>characterEncodingFilter</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
<listener>
<listener-class>org.springframework.web.util.Log4jConfigListener</listener-class>
</listener>
</web-app>
spring的配置文件:(已在xml文件中进行详细的注释,不多说明)
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:aop="http://www.springframework.org/schema/aop"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:tx="http://www.springframework.org/schema/tx"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.2.xsd
http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.0.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.0.xsd
http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.0.xsd">
<!-- 添加注解支持 -->
<context:annotation-config />
<!-- 扫描server层包 -->
<context:component-scan base-package="com.steadyjack.server"></context:component-scan>
<!-- 导入jdbc数据库连接信息的配置文件 -->
<context:property-placeholder location="classpath:jdbc.properties" />
<!-- 配置数据源 c3p0 -->
<bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
<property name="driverClass" value="${jdbc.driverClassName}"></property>
<property name="user" value="${jdbc.user}"></property>
<property name="password" value="${jdbc.password}"></property>
<property name="jdbcUrl" value="${jdbc.url}"></property>
<property name="initialPoolSize" value="${jdbc.initialPoolSize}"></property>
<property name="maxPoolSize" value="${jdbc.maxPoolSize}"></property>
<property name="acquireIncrement" value="${jdbc.acquireIncrement}"></property>
<property name="maxStatements" value="${jdbc.maxStatements}"></property>
<property name="maxStatementsPerConnection" value="${jdbc.maxStatementsPerConnection}"></property>
<property name="maxIdleTime" value="${jdbc.maxIdleTime}"></property>
</bean>
<!-- 配置hibernate的sessionFactory,并让spring的ioc进行管理 -->
<bean id="sessionFactory" class="org.springframework.orm.hibernate4.LocalSessionFactoryBean">
<!-- 配置数据源属性 -->
<property name="dataSource" ref="dataSource"></property>
<!-- 引入hibernate的属性配置文件 -->
<property name="configLocation" value="classpath:hibernate.cfg.xml"></property>
<!-- 扫描实体类,将其映射为具体的数据库表 -->
<property name="packagesToScan" value="com.steadyjack.server.model"></property>
</bean>
<!-- 配置事务管理,采用Hibernate4 -->
<bean id="transactionManager" class="org.springframework.orm.hibernate4.HibernateTransactionManager">
<property name="sessionFactory" ref="sessionFactory"></property>
</bean>
<!-- 配置事务传播属性,注意需要有事务管理(transaction-manager) : 其实就是事务(方法)发生的时间和要发生的故事-->
<tx:advice id="txAdvice" transaction-manager="transactionManager">
<tx:attributes>
<tx:method name="add*" propagation="REQUIRED"/>
<tx:method name="save*" propagation="REQUIRED"/>
<tx:method name="insert*" propagation="REQUIRED"/>
<tx:method name="delete*" propagation="REQUIRED"/>
<tx:method name="update*" propagation="REQUIRED"/>
<tx:method name="find*" propagation="REQUIRED" read-only="true"/>
<tx:method name="load*" propagation="REQUIRED" read-only="true"/>
<tx:method name="query*" propagation="REQUIRED" read-only="true"/>
<tx:method name="*" propagation="REQUIRED"/>
</tx:attributes>
</tx:advice>
<!-- 配置事务切面,并关联事务的传播属性: 其实就是一个方法,只是这个方法是事务性的事务,它的发生不是随机的,而是具有时间,地点和该发生的故事的 -->
<aop:config>
<!-- 切点: 其实就是告诉了地点 -->
<aop:pointcut expression="execution(* com.steadyjack.server.service.*.*(..))" id="pointCut"/>
<!-- 要执行那样的事务,那当然得需要通知,通知它什么时候发生,在哪里发生,发生啥事 -->
<aop:advisor advice-ref="txAdvice" pointcut-ref="pointCut"/>
</aop:config>
</beans>
数据库配置文件jdbc.properties:
jdbc.driverClassName=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql://localhost:3306/db_springspringmvchibernate?autoReconnect=true&useUnicode=true&characterEncoding=utf-8
jdbc.user=root
jdbc.password=123456
jdbc.initialPoolSize=4
jdbc.minPoolSize=3
jdbc.maxPoolSize=15
jdbc.acquireIncrement=3
jdbc.maxStatements=10
jdbc.maxStatementsPerConnection=5
jdbc.maxIdleTime=6000
hibernate配置文件:
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE hibernate-configuration PUBLIC
"-//Hibernate/Hibernate Configuration DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">
<hibernate-configuration>
<session-factory>
<property name="dialect">org.hibernate.dialect.MySQL5Dialect</property>
<property name="show_sql">true</property>
<property name="format_sql">true</property>
<property name="hbm2ddl.auto">update</property>
<!-- 配置二级缓存相关 -->
</session-factory>
</hibernate-configuration>
springmvc的配置文件:
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:aop="http://www.springframework.org/schema/aop"
xmlns:context="http://www.springframework.org/schema/context" xmlns:tx="http://www.springframework.org/schema/tx"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xsi:schemaLocation="http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.0.xsd
http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd
http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.2.xsd
http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.0.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.0.xsd">
<!-- 扫描web层 -->
<context:component-scan base-package="com.steadyjack.web.controller" />
<!-- 配置静态资源不经过dispatcher处理 -->
<mvc:default-servlet-handler/>
<mvc:annotation-driven />
<!-- 解析的结果: 前缀+ viewName +后缀 -->
<bean id="viewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="prefix" value="/WEB-INF/pages/"></property>
<property name="suffix" value=".jsp"></property>
</bean>
</beans>
最后是日志配置log4j.properties:
log4j.rootLogger = INFO, console, R
log4j.appender.console = org.apache.log4j.ConsoleAppender
log4j.appender.console.layout = org.apache.log4j.PatternLayout
log4j.appender.console.layout.ConversionPattern = %-d{yyyy-MM-dd HH:mm:ss} [%c]-[%p] %m%n
log4j.appender.R = org.apache.log4j.RollingFileAppender
log4j.appender.R.File = D:\\logs\\log.log
log4j.appender.R.MaxFileSize = 500KB
log4j.appender.R.MaxBackupIndex = 1
log4j.appender.R.layout = org.apache.log4j.PatternLayout
log4j.appender.R.layout.ConversionPattern=%-d{yyyy-MM-dd HH:mm:ss} [%c]-[%p] - %m%n
然后,建立com.steadyjack.server.dao、com.steadyjack.server.dao.impl这两个package,并在impl包创建BaseDaoImpl.java文件,用于获取hibernate的sessionFactory,以便给各个dao通用。
package com.steadyjack.server.dao.impl;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Repository;
@Repository
public class BaseDaoImpl{
@Autowired
private SessionFactory sessionFactory;
public Session getSession(){
return sessionFactory.getCurrentSession();
}
}
在com.steadyjack.server.model包下建立 User 这个Model
package com.steadyjack.server.model;
import java.io.Serializable;
import java.util.Date;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.Table;
@Entity
@Table(name="tb_user")
public class User implements Serializable{
/**
*
*/
private static final long serialVersionUID = -5813264827007873950L;
private Integer id;
private String userName;
private String password;
private String email;
//1-男 0-女
private Integer sex;
//序列码
private String validateSerCode;
//序列码过时日期
private Date validateOverDate;
//用户名的字节编码
private String userNameEncodes;
//是否已经被验证:0表示未验证 1表示已经验证
private Integer isValidated=0;
@Id
@GeneratedValue(strategy = GenerationType.AUTO)
public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
@Column(name="user_name")
public String getUserName() {
return userName;
}
public void setUserName(String userName) {
this.userName = userName;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
public Integer getSex() {
return sex;
}
public void setSex(Integer sex) {
this.sex = sex;
}
public String getEmail() {
return email;
}
public void setEmail(String email) {
this.email = email;
}
@Column(name="validate_ser_code")
public String getValidateSerCode() {
return validateSerCode;
}
public void setValidateSerCode(String validateSerCode) {
this.validateSerCode = validateSerCode;
}
@Column(name="validate_over_date")
public Date getValidateOverDate() {
return validateOverDate;
}
public void setValidateOverDate(Date validateOverDate) {
this.validateOverDate = validateOverDate;
}
@Column(name="user_name_encodes")
public String getUserNameEncodes() {
return userNameEncodes;
}
@Column(name="is_validated")
public Integer getIsValidated() {
return isValidated;
}
public void setIsValidated(Integer isValidated) {
this.isValidated = isValidated;
}
public void setUserNameEncodes(String userNameEncodes) {
this.userNameEncodes = userNameEncodes;
}
@Override
public String toString() {
return "User [id=" + id + ", userName=" + userName + ", password="
+ password + ", email=" + email + ", sex=" + sex + "]";
}
}
在com.steadyjack.server.dao建立UserDao以及在 com.steadyjack.server.dao.impl建立UserDaoImpl
package com.steadyjack.server.dao;
import java.util.List;
import com.steadyjack.server.model.User;
public interface UserDao {
public void saveUser(User user);
public User queryUser(User user);
public User findUserById(Integer id);
public User findUserPassword(String userName,String email);
public List<User> findUser(List<Object> params,String hql);
public void updateUser(User user);
public User findUserByUserName(String userName);
}
package com.steadyjack.server.dao.impl;
import java.util.List;
import org.hibernate.Query;
import org.springframework.stereotype.Repository;
import com.steadyjack.server.dao.UserDao;
import com.steadyjack.server.model.User;
@Repository
public class UserDaoImpl extends BaseDaoImpl implements UserDao {
@SuppressWarnings("unchecked")
public User queryUser(User user) {
String hql="from User where userName=? and password=?";
Query query=getSession().createQuery(hql);
query.setParameter(0, user.getUserName());
query.setParameter(1, user.getPassword());
User currentUser=null;
List<User> userList=query.list();
if (userList!=null && userList.size()>0) {
currentUser=userList.get(0);
}
return currentUser;
}
public void saveUser(User user) {
getSession().save(user);
}
public User findUserById(Integer id) {
String hql="from User where id=?";
Query query=getSession().createQuery(hql);
query.setParameter(0, id);
User user=(User) query.uniqueResult();
return user;
}
public User findUserPassword(String userName, String email) {
String hql="from User where userName=? and email=?";
Query query=getSession().createQuery(hql);
query.setParameter(0, userName);
query.setParameter(1, email);
User currentUser=(User) query.uniqueResult();
return currentUser;
}
public void updateUser(User user) {
getSession().update(user);
}
@SuppressWarnings("unchecked")
public List<User> findUser(List<Object> params,String hql) {
Query query=getSession().createQuery(hql);
if (params!=null && params.size()>0) {
for(int i=0;i<params.size();i++){
query.setParameter(i, params.get(i));
}
}
return query.list();
}
public User findUserByUserName(String userName) {
String hql="from User where userName=?";
Query query=getSession().createQuery(hql);
query.setParameter(0, userName);
return (User) query.uniqueResult();
}
}
在com.steadyjack.server.service包下建立UserService以及在com.steadyjack.server.service.impl包下建立UserServiceImpl
package com.steadyjack.server.service;
import java.util.List;
import java.util.Map;
import com.steadyjack.server.model.User;
public interface UserService {
public void addUser(User user);
public User queryUser(User user);
public User getUserById(Integer id);
public User findUserPassword(String userName,String email);
public List<User> findUsers(Map<String, Object> map);
public void updateUser(User user);
public void saveUser(User user);
public User findUserByUserName(String userName);
}
package com.steadyjack.server.service.impl;
import java.util.LinkedList;
import java.util.List;
import java.util.Map;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import com.steadyjack.server.dao.UserDao;
import com.steadyjack.server.model.User;
import com.steadyjack.server.service.UserService;
@Service
public class UserServiceImpl implements UserService {
@Autowired
private UserDao userDao;
public void addUser(User user) {
userDao.saveUser(user);
}
public User queryUser(User user) {
return userDao.queryUser(user);
}
public User getUserById(Integer id) {
return userDao.findUserById(id);
}
public User findUserPassword(String userName, String email) {
return userDao.findUserPassword(userName, email);
}
public void updateUser(User user) {
userDao.updateUser(user);
}
public List<User> findUsers(Map<String, Object> map) {
StringBuffer hql=new StringBuffer("from User where 1=1 ");
List<Object> params=new LinkedList<Object>();
if (map.get("userName")!=null) {
hql.append(" and userName=? ");
params.add(map.get("userName"));
}
if (map.get("email")!=null) {
hql.append(" and email=? ");
params.add(map.get("email"));
}
if (map.get("sex")!=null) {
hql.append(" and sex=? ");
params.add(map.get("sex"));
}
if (map.get("validateOverDate")!=null) {
hql.append(" and validateOverDate=? ");
params.add(map.get("validateOverDate"));
}
if (map.get("validateSerCode")!=null) {
hql.append(" and validateSerCode=? ");
params.add(map.get("validateSerCode"));
}
if (map.get("userNameEncodes")!=null) {
hql.append(" and userNameEncodes=? ");
params.add(map.get("userNameEncodes"));
}
System.out.println(hql.toString());
return userDao.findUser(params, hql.toString());
}
public User findUserByUserName(String userName) {
return userDao.findUserByUserName(userName);
}
public void saveUser(User user) {
userDao.saveUser(user);
}
}
最后,我们需要在com.steadyjack.web.controller包建立UserController(先介绍登录这个功能)
package com.steadyjack.web.controller;
import java.util.Date;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import javax.servlet.http.HttpServletRequest;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.ui.ModelMap;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;
import com.steadyjack.server.model.User;
import com.steadyjack.server.service.UserService;
import com.steadyjack.server.utils.DateUtils;
import com.steadyjack.server.utils.JavaMailUtils;
import com.steadyjack.server.utils.SystemUtils;
import com.steadyjack.server.utils.UUIDUtils;
@RequestMapping("/user")
@Controller
public class UserController {
@Autowired
private UserService userService;
@RequestMapping("/index/{id}")
public String index(ModelMap map,@PathVariable Integer id){
System.out.println(userService.getUserById(id));
map.put("loginUser", userService.getUserById(id));
return "user/index";
}
@ResponseBody
@RequestMapping("/login")
public Map<String, Object> userLogin(ModelMap map,HttpServletRequest request) throws Exception{
Map<String, Object> resultMap=new HashMap<String, Object>();
User user=new User();
user.setUserName(request.getParameter("userName"));
user.setPassword(request.getParameter("password"));
User currentUser=userService.queryUser(user);
if (currentUser!=null) {
resultMap.put("id", currentUser.getId());
resultMap.put("res", "yes");
}else{
resultMap.put("res", "no");
}
return resultMap;
}
}
最后是webContent的启动jsp文件index.jsp(这里用到了jquery ajax的交互):
<%@ page language="java" contentType="text/html; charset=utf-8"
pageEncoding="utf-8" %>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<c:set value="${pageContext.request.contextPath }" var="ctx"></c:set>
<script type="text/javascript" src="${ctx}/style/js/jquery-1.7.2.min.js"></script>
<title>用户登录</title>
<script type="text/javascript">
$(function(){
var serverUrl=$('#serverUrl').val();
$('#loginBtn').click(function(){
var userName = $('#userName').val();
var password = $('#password').val();
if (userName == null || password == null || trim(userName) == "" || trim(password) == "") {
$('#errorTip').html("用户名或密码不能为空!");
return false;
}
$('#errorTip').html("");
$.post(serverUrl+'/user/login',{
userName:userName,
password:password
},function(requestData){
if (requestData.res=='yes') {
window.location.href=serverUrl+'/user/index/'+parseInt(requestData.id);
} else {
$('#errorInfo').html('*用户名或者密码错误!');
}
});
});
});
function resetValue() {
$('#userName').val("");
$('#password').val("");
}
//去掉最后的空格
function trim(str) {
return str.replace(/(^\s+)|(\s+$)/g, "");
}
</script>
</head>
<body>
<input type="hidden" id="serverUrl" value="${pageContext.request.contextPath}" />
<div align="center" style="padding-top: 50px;">
<form>
<table>
<tr>
<td>用户名:</td>
<td><input type="text" id="userName" name="userName" /></td>
</tr>
<tr>
<td>密码:</td>
<td><input type="password" id="password" name="password" /></td>
</tr>
<tr>
<td><input type="button" value="登录" id="loginBtn"/></td>
<td><input type="button" value="重置" /></td>
</tr>
<tr>
<td></td>
<td id="errorInfo" style="color: #ff0000;"></td>
</tr>
</table>
<div id="errorTip"></div>
</form>
<a href="${ctx}/user/forgetPassword">忘记密码</a> <a href="${ctx}/user/toRegister">用户注册</a>
</div>
</body>
</html>
右键项目,run 到tomcat,跑起来。如果没有报错,说明启动成功了!然后我们需要在我们的数据库录入用户的信息,测试登录功能。如下图:
好了,初步就先介绍到这里吧,明天介绍博文开篇提到的两个小模块!
文章浏览阅读566次。地点:中国科学技术大学西区学生活动中心(一楼)报告厅【宣讲会专场1】让制造更高效、更智能、更可持续—智能制造学域时间:2023年11月16日(星期四)18:00【宣讲会专场2】在机器人和自主系统领域实现全球卓越—机器人与自主系统学域时间:2023年11月17日(星期五)14:30
文章浏览阅读1.1w次,点赞2次,收藏2次。大家好,今天讲下在开发RN过程中使用ScrollView控件出现的问题。最初的开发需求是显示一个界面,这个界面有两个特点:1)纵向很长,显示的内容有点多2)界面的下半部分中有TextInput控件要想满足第一个条件,首先想到的是将显示的这些内容最外层加上一层ScrollView控件包裹,经过测试,确实是可以的。TextInput控件后面根了一个删除按钮,删除按钮_rn控制软件盘消失
文章浏览阅读850次。大家有什么疑问可以留言,我们共同解决!留言哦!在“发送短信”按钮的单击事件处理的回调方法onClick()的实现中,实现发送短信的功能。btnSendSMS.setOnClickListener(new View.OnClickListener() { publ_andriod发短信回调
文章浏览阅读102次。class TQZAutoReport: __is_updating = False @classmethod def tqz_update(cls, settlement_jsonfile): """ Create or Update today auto report. """ if TQZAutoReport.__source_data_is_update( current_._@outerapi
文章浏览阅读4.9k次。根据《Java并发编程实践》一书整理的思维导图。希望能够有所帮助。
文章浏览阅读3.5k次。根据数学分析中傅里叶级数的相关结论和黎曼积分的思想推导一维连续傅里叶变换和其逆变换的公式。_连续傅里叶逆变换公式推导
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文章浏览阅读465次。写在面前偶然看到朋友圈有人分享的,书名叫做:《工业4.0通信与识别技术的实战技巧》我看了下目录,更像是西门子部分通讯产品的使用案例和应用技巧,介绍了西门子的工业交换机,工业无线产品,RFID等产品的基础原理和应用案例,应该适合于很多人,觉得对自己有帮助的朋友在文末找到关键字后台回复即可~昨天发了文章:然后就有朋友跑来问我,为啥不学学很多公众号,各种需要分享到朋友圈或者群聊才提供下载(..._工业4.0通信与识别技术的实战技巧
文章浏览阅读1.9k次。 在今天之前我一直以为不能使用eclipse输入命令行参数,所以我都是使用dos命令来输入命令行参数,但是后来才发现原来eclipse也是可以的,现在分享一下:1、右击工程,Run As -> Run Configurations2、在Arguments -> Program arguments处输入参数即可。 注:以前使用的是dos命令窗口 ..._泡沫参数在eclipse中如何输入进去
文章浏览阅读1.7k次。仪表板是表示任何类型数据的好方法,它是一种可以很好地理解我们正在处理的数据的形式。使用 HTML、CSS 和 JavaScript 框架构建令人惊叹的仪表板可能是一项非常棘手的工作,尤其是当您想要向仪表板添加复杂的功能和复杂的设计时。但不用担心,Python 会来拯救你。_streamlit设置css
文章浏览阅读2.3w次,点赞2次,收藏8次。PostgreSQL中charactercharacter varingtext数据类型的区别一测试环境测试表PostgreSQL中character、character varing、text数据类型的区别一.测试环境:PostgreSQL 9.6.5pgAdmin 4.1.0测试表:test表: ch4 chvar4 chvar tx character(4) c_postgresql的character va
文章浏览阅读421次。转自:http://www.cppblog.com/oosky/archive/2007/01/08/17422.htmltag:汇编,pascal,fastcall,stdcall,thiscall,cdecl,调用约定,函数调用约定,返回值传递方式摘要:文章讲述了几种主要程序语言中的函数调用约定;详细说明时主要以VC6中的函数调用约定为主,阐释方式主要是以C++___fastcall eax edx ecx