记录搭建ssm项目
搞java也快3年了，搭建一个ssm居然有点吃力。
参考链接：https://blog.csdn.net/gebitan505/article/details/44455235/
环境准备：jdk8、maven、idea
1、新建maven项目，增加web模块
2、集成spring
导入基本jar包：
<properties>
<java-version>1.8</java-version>
<spring-verion>4.3..RELEASE</spring-verion>
<mybatis-version>3.4.</mybatis-version>
</properties> <dependencies> <!-- spring -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-core</artifactId>
<version>${spring-verion}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context</artifactId>
<version>${spring-verion}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-jdbc</artifactId>
<version>${spring-verion}</version>
</dependency>
<dependency>
<groupId>org.springframework.batch</groupId>
<artifactId>spring-batch-infrastructure</artifactId>
<version>3.0..RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-web</artifactId>
<version>${spring-verion}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-aop</artifactId>
<version>${spring-verion}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-beans</artifactId>
<version>${spring-verion}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<version>${spring-verion}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-test</artifactId>
<version>${spring-verion}</version>
</dependency> <!-- aop dependencies-->
<dependency>
<groupId>org.aspectj</groupId>
<artifactId>aspectjweaver</artifactId>
<version>1.8.</version>
</dependency>
<!-- bean validate -->
<dependency>
<groupId>javax.validation</groupId>
<artifactId>validation-api</artifactId>
<version>1.1..Final</version>
</dependency>
2、集成mybatis
spring的话什么也不写的话就只需要书写一下ApplicationContext.xml即可。所以直接准备与mybatis集成
导入jar：
<!-- mybatis -->
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis</artifactId>
<version>${mybatis-version}</version>
</dependency>
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis-spring</artifactId>
<version>1.3.</version>
</dependency>
<!-- mysql -->
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>8.0.</version>
</dependency>
然后写好简单的目录结构：
书写spring-mybatis的配置文件：
包含功能：spring的基本扫描，datascource的管理，sessionFactory的配置，transManage的配置，mybatis-mapper的扫描
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:context="http://www.springframework.org/schema/context"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd"> <!-- spring和mybatis进行整合。主要进行扫描、注入、配置数据库 --> <context:property-placeholder location="classpath:config/props/jdbc.properties" ignore-unresolvable="true"/> <!-- 扫描 -->
<context:component-scan base-package="com.testweb">
<!-- 避免重复扫描controller -->
<context:exclude-filter type="annotation" expression="org.springframework.stereotype.Controller" />
</context:component-scan> <!-- 配置数据源 -->
<bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
<property name="driverClassName"><value>${jdbc.driverClassName}</value></property>
<property name="url"><value>${jdbc.url}</value></property>
<property name="username"><value>${jdbc.username}</value></property>
<property name="password"><value>${jdbc.password}</value></property>
</bean> <!-- session工厂 -->
<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
<property name="dataSource" ref="dataSource" />
<!-- 自动扫描mapping.xml文件 -->
<property name="mapperLocations" value="classpath:com/testweb/dal/mapper/UserDOMapper.xml"></property>
</bean> <!-- 扫描mapper接口 -->
<!-- 使用tk.mybatis所以注释掉mybatis的
<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
<property name="basePackage" value="com.testweb.dal.mapper"/>
<property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"/>
</bean>
-->
<bean class="tk.mybatis.spring.mapper.MapperScannerConfigurer">
<property name="basePackage" value="com.testweb.dal.mapper"/>
<property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"/>
</bean> <!-- 事务管理 -->
<bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
<property name="dataSource" ref="dataSource"/>
</bean> </beans>
tk.mybatis是通用mapper，为了简化xml编写的一个第三方插件
<!-- tk.mybatis -->
<dependency>
<groupId>tk.mybatis</groupId>
<artifactId>mapper</artifactId>
<version>4.0.</version>
</dependency>
然后准备测试一下与spring与mybatis的整合是否成功
使用mybatis-generator进行实体的生成等。
依赖：
<!-- mybatis-generator -->
<dependency>
<groupId>org.mybatis.generator</groupId>
<artifactId>mybatis-generator-core</artifactId>
<version>1.3.</version>
</dependency>
<!-- junit -->
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.12</version>
<scope>test</scope>
</dependency>
测试用到junit所以干脆把junit也带过来。
测试使用junit与spring集成，需要spring-test包：
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-test</artifactId>
<version>${spring-verion}</version>
</dependency>
mybatis-generator.xml：
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE generatorConfiguration
PUBLIC "-//mybatis.org//DTD MyBatis Generator Configuration 1.0//EN"
"http://mybatis.org/dtd/mybatis-generator-config_1_0.dtd">
<generatorConfiguration>
<!--数据库驱动-->
<classPathEntry location="D:\idea\repository\mysql\mysql-connector-java\8.0.11\mysql-connector-java-8.0.11.jar"/>
<context id="DB2Tables" targetRuntime="MyBatis3">
<commentGenerator>
<property name="suppressDate" value="true"/>
<property name="suppressAllComments" value="true"/>
</commentGenerator>
<!--数据库链接地址账号密码-->
<jdbcConnection driverClass="com.mysql.cj.jdbc.Driver"
connectionURL="jdbc:mysql://localhost:3306/testweb?useSSL=false" userId="root" password="961012gz">
</jdbcConnection>
<javaTypeResolver>
<property name="forceBigDecimals" value="false"/>
</javaTypeResolver>
<!--生成Model类存放位置-->
<javaModelGenerator targetPackage="com.testweb.dal.model" targetProject="src/main/java">
<property name="enableSubPackages" value="true"/>
<property name="trimStrings" value="true"/>
</javaModelGenerator>
<!--生成映射文件存放位置-->
<sqlMapGenerator targetPackage="com.testweb.dal.mapper" targetProject="src/main/resources">
<property name="enableSubPackages" value="true"/>
</sqlMapGenerator>
<!--生成Dao类存放位置-->
<javaClientGenerator type="XMLMAPPER" targetPackage="com.testweb.dal.mapper" targetProject="src/main/java">
<property name="enableSubPackages" value="true"/>
</javaClientGenerator>
<!--生成对应表及类名-->
<table tableName="t_user" domainObjectName="UserDO" enableCountByExample="false" enableUpdateByExample="false" enableDeleteByExample="false" enableSelectByExample="false" selectByExampleQueryId="false"></table>
</context>
</generatorConfiguration>
mybatis-generator为了idea运行配置插件：
<!-- mybatis逆向工程 -->
<plugin>
<groupId>org.mybatis.generator</groupId>
<artifactId>mybatis-generator-maven-plugin</artifactId>
<version>1.3.</version>
<configuration>
<!--配置文件的位置-->
<configurationFile>src/main/resources/generatorConfig.xml</configurationFile>
<verbose>true</verbose>
<overwrite>true</overwrite>
</configuration>
</plugin>
测试类：
package build; import com.testweb.common.enums.UserLockStatusEnum;
import com.testweb.dal.mapper.UserDOMapper;
import com.testweb.dal.model.UserDO;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner; /**
* @author zhen
* @Date 2018/5/23 13:36
*/
@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(locations = {"classpath:config/spring/spring-mybatis.xml"})
public class TestMyBatis { @Autowired
private UserDOMapper userDOMapper; @Test
public void testAddUser(){
UserDO userDO = new UserDO();
userDO.setName("admin");
userDO.setPassword("");
userDO.setPhone("");
userDO.setStatus(UserLockStatusEnum.NORMAL.getCode());
int i = userDOMapper.insert(userDO);
System.out.println(i);
}
}
然后进行spring与mvc的耦合：
写spring-mvc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:context="http://www.springframework.org/schema/context"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/tool http://www.springframework.org/schema/tool/spring-tool.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd"> <mvc:annotation-driven></mvc:annotation-driven>
<!-- 扫描Controller -->
<context:component-scan base-package="com.testweb.controller"></context:component-scan> <!-- 使用mvc:annotation-driven替代，它有默认配置
注解处理器适配器
<bean class="org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter"></bean>
注解处理器映射器
<bean class="org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerMapping"></bean>
JSON转换器，支持@RequestBody与@ResponseBody
<bean class="org.springframework.http.converter.json.MappingJackson2HttpMessageConverter">
<property name="supportedMediaTypes">
<list>
<value>text/html;charset=UTF-</value>
</list>
</property>
</bean>
--> <!-- 视图解析器 -->
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<!-- 前缀 -->
<property name="prefix" value="/WEB-INF/jsp/"/>
<!-- 后缀 -->
<property name="suffix" value=".jsp"/>
</bean> <!-- 文件上传 -->
<bean id="multipartResolver"
class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
<!-- 上传文件大小上限，单位为字节（10MB） -->
<property name="maxUploadSize">
<value></value>
</property>
<!-- 请求的编码格式，必须和jSP的pageEncoding属性一致，以便正确读取表单的内容，默认为ISO-- -->
<property name="defaultEncoding">
<value>UTF-</value>
</property>
</bean> </beans>
对了，配置log4j
配置文件：
log4j.rootLogger=INFO,Console,File
#定义日志输出目的地为控制台
log4j.appender.Console=org.apache.log4j.ConsoleAppender
log4j.appender.Console.Target=System.out
#可以灵活地指定日志输出格式，下面一行是指定具体的格式
log4j.appender.Console.layout = org.apache.log4j.PatternLayout
log4j.appender.Console.layout.ConversionPattern=[%c] - %m%n #文件大小到达指定尺寸的时候产生一个新的文件
log4j.appender.File = org.apache.log4j.RollingFileAppender
#指定输出目录
log4j.appender.File.File = E:/logs/testweb/testweb.log
#定义文件最大大小
log4j.appender.File.MaxFileSize = 10MB
# 输出所以日志，如果换成DEBUG表示输出DEBUG以上级别日志
log4j.appender.File.Threshold = ALL
log4j.appender.File.layout = org.apache.log4j.PatternLayout
log4j.appender.File.layout.ConversionPattern =[%p] [%d{yyyy-MM-dd HH\:mm\:ss}][%c]%m%n
因为log4j的位置放在的不是默认的路径下，所以需要在web.xml中配置监听：
<!-- log4j 配置文件的位置-->
<context-param>
<param-name>log4jConfigLocation</param-name>
<param-value>classpath:config/props/log4j.properties</param-value>
</context-param> <listener>
<listener-class>org.springframework.web.util.Log4jConfigListener</listener-class>
</listener>
web.xml配置spring和springMVC：
<!-- 添加Spring监听 -->
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:config/spring/spring-mybatis.xml</param-value>
</context-param>
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener> <!-- Spring&mvc -->
<servlet>
<servlet-name>springMvc</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:config/spring/spring-mvc.xml</param-value>
</init-param>
</servlet>
<servlet-mapping>
<servlet-name>springMvc</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping> <!-- 编码过滤器 -->
<filter>
<filter-name>encodingFilter</filter-name>
<filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
<init-param>
<param-name>encoding</param-name>
<param-value>UTF-</param-value>
</init-param>
</filter>
<filter-mapping>
<filter-name>encodingFilter</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
简单书写代码进行测试：
这里跑项目配合本地tomcat打包有点问题，直接使用jetty插件跑的：
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<configuration>
<source>1.8</source>
<target>1.8</target>
</configuration>
</plugin> <!-- jetty 插件 -->
<plugin>
<groupId>org.eclipse.jetty</groupId>
<artifactId>jetty-maven-plugin</artifactId>
<version>9.3..M1</version>
</plugin>
其他jar包：
<!-- common -->
<!-- log -->
<dependency>
<groupId>commons-logging</groupId>
<artifactId>commons-logging</artifactId>
<version>1.2</version>
</dependency>
<dependency>
<groupId>log4j</groupId>
<artifactId>log4j</artifactId>
<version>1.2.</version>
</dependency> <!-- json -->
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-databind</artifactId>
<version>2.8.</version>
</dependency>
整个pom.xml:
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.</modelVersion> <groupId>test-web</groupId>
<artifactId>test-web</artifactId>
<version>1.0-SNAPSHOT</version> <properties>
<java-version>1.8</java-version>
<spring-verion>4.3..RELEASE</spring-verion>
<mybatis-version>3.4.</mybatis-version>
</properties> <dependencies> <!-- spring -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-core</artifactId>
<version>${spring-verion}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context</artifactId>
<version>${spring-verion}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-jdbc</artifactId>
<version>${spring-verion}</version>
</dependency>
<dependency>
<groupId>org.springframework.batch</groupId>
<artifactId>spring-batch-infrastructure</artifactId>
<version>3.0..RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-web</artifactId>
<version>${spring-verion}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-aop</artifactId>
<version>${spring-verion}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-beans</artifactId>
<version>${spring-verion}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<version>${spring-verion}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-test</artifactId>
<version>${spring-verion}</version>
</dependency> <!-- aop dependencies-->
<dependency>
<groupId>org.aspectj</groupId>
<artifactId>aspectjweaver</artifactId>
<version>1.8.</version>
</dependency>
<!-- bean validate -->
<dependency>
<groupId>javax.validation</groupId>
<artifactId>validation-api</artifactId>
<version>1.1..Final</version>
</dependency>
<!-- framework -->
<dependency>
<groupId>org.freemarker</groupId>
<artifactId>freemarker</artifactId>
<version>2.3.</version>
</dependency> <!-- mybatis -->
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis</artifactId>
<version>${mybatis-version}</version>
</dependency>
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis-spring</artifactId>
<version>1.3.</version>
</dependency>
<!-- mysql -->
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>8.0.</version>
</dependency> <!-- jsp、servlet、jstl-->
<dependency>
<groupId>javax.servlet.jsp</groupId>
<artifactId>jsp-api</artifactId>
<version>2.1</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>javax.servlet-api</artifactId>
<version>3.1.</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>jstl</artifactId>
<version>1.2</version>
</dependency> <!-- common -->
<!-- log -->
<dependency>
<groupId>commons-logging</groupId>
<artifactId>commons-logging</artifactId>
<version>1.2</version>
</dependency>
<dependency>
<groupId>log4j</groupId>
<artifactId>log4j</artifactId>
<version>1.2.</version>
</dependency> <!-- json -->
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-databind</artifactId>
<version>2.8.</version>
</dependency> <!-- mybatis-generator -->
<dependency>
<groupId>org.mybatis.generator</groupId>
<artifactId>mybatis-generator-core</artifactId>
<version>1.3.</version>
</dependency>
<!-- tk.mybatis -->
<dependency>
<groupId>tk.mybatis</groupId>
<artifactId>mapper</artifactId>
<version>4.0.</version>
</dependency> <!-- junit -->
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.12</version>
<scope>test</scope>
</dependency> <!-- dom4j -->
<dependency>
<groupId>dom4j</groupId>
<artifactId>dom4j</artifactId>
<version>1.6.</version>
</dependency>
<!-- xpath -->
<dependency>
<groupId>jaxen</groupId>
<artifactId>jaxen</artifactId>
<version>1.1.</version>
</dependency> <!-- poi -->
<dependency>
<groupId>org.apache.poi</groupId>
<artifactId>poi</artifactId>
<version>3.17</version>
</dependency>
<dependency>
<groupId>org.apache.poi</groupId>
<artifactId>poi-ooxml</artifactId>
<version>3.17</version>
</dependency> <!-- samba -->
<dependency>
<groupId>org.samba.jcifs</groupId>
<artifactId>jcifs</artifactId>
<version>1.2.</version>
</dependency> </dependencies> <build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<configuration>
<source>1.8</source>
<target>1.8</target>
</configuration>
</plugin> <!-- jetty 插件 -->
<plugin>
<groupId>org.eclipse.jetty</groupId>
<artifactId>jetty-maven-plugin</artifactId>
<version>9.3..M1</version>
</plugin> <!-- mybatis逆向工程 -->
<plugin>
<groupId>org.mybatis.generator</groupId>
<artifactId>mybatis-generator-maven-plugin</artifactId>
<version>1.3.</version>
<configuration>
<!--配置文件的位置-->
<configurationFile>src/main/resources/generatorConfig.xml</configurationFile>
<verbose>true</verbose>
<overwrite>true</overwrite>
</configuration>
</plugin>
</plugins>
</build> </project>
项目的代码：链接: https://pan.baidu.com/s/1iSLiu1RUMOsODHG149kGNw 密码: pjw4
记录搭建ssm项目的更多相关文章
- Maven 搭建 SSM 项目 （oracle）
简单谈一下maven搭建 ssm 项目 (使用数据库oracle,比 mysql 难,所以这里谈一下) 在创建maven 的web项目时,常常会缺了main/java , main/test 两个文件 ...
- 自动搭建ssm项目
手把手教你搭建ssm项目 注意,必须修改:包名.数据库名称.账号.密码 注意:必须配置好第一次,“引入后”才能配置第二次 第一步:打开idea选择创建maven项目 import java.io.*; ...
- 搭建SSM项目时报错（org.springframework.jdbc.CannotGetJdbcConnectionException）
严重: Servlet.service() for servlet [SpringMVC] in context with path [/ssm] threw exception [Request p ...
- 用idea搭建SSM项目，原来这么简单
目录 前言 软件环境 创建项目 数据库文件 配置文件 pom.xml log4j.properties jdbc.properties applicationContext.xml spring-mv ...
- 搭建ssm项目框架
[声明]转载注明链接,源码联系公众号:aandb7获取 [此处组织名groupId:com.dayuanit,可替换公司域名:项目名artifactid:...] 此处第二个配置文件选择maven安装 ...
- 模拟Springboot一:(零xml配置搭建SSM项目)
在spring官网文档中无论是spring的基础文档,还是spring-mvc文档都推荐我们使用javaconfig的方式来搭建项目 间接说明 (优点:javaconfig配置>xml配置) 其 ...
- Spring Boot2 系列教程(一)纯 Java 搭建 SSM 项目
在 Spring Boot 项目中,正常来说是不存在 XML 配置,这是因为 Spring Boot 不推荐使用 XML ,注意,并非不支持,Spring Boot 推荐开发者使用 Java 配置来搭 ...
- （05节）快速搭建SSM项目
1.1 快速搭建Web项目 注意点:name:archetypeCatalog,value:internal 原因:Intellij IDEA根据maven archetype的本质,执行mvn a ...
- 搭建SSM项目框架全过程及思考
1.前言 之前都是在现有框架下进行写代码或者总是看一些别人的架构,总会眼高手低.于是打算自己完整的走一遍流程,同时把所遇到的问题,思考的问题记下来,供大家参考.由于是工作年限不高,属于新手,不足之处还 ...
随机推荐
- fMRI在认知心理学上的研究
参考:Principles of fMRI 1 问题: 1. fMRI能做什么不能做什么? 第一周:fMRI简介,data acquisition and reconstruction 大致分为两类: ...
- Linux（centos7）上安装最新版R3.4.1
说来惭愧,居然没有在Linux安装R的经验,因为一直很少用R,用也是在win平台. 下载路径:https://cran.rstudio.com/src/base/R-3/ 强烈建议不要安装最新的R,除 ...
- （转）python 全栈开发，Day74(基于双下划线的跨表查询,聚合查询,分组查询,F查询,Q查询)
昨日内容回顾 # 一对多的添加方式1(推荐) # book=Book.objects.create(title="水浒传",price=100,pub_date="164 ...
- piggy.lnk 简析
piggy.lnk 简析 SECTIONS { .data : { input_len = .; LONG(input_data_end - input_data) input_data = .; * ...
- Northcott Game HDU - 1730
Tom和Jerry正在玩一种Northcott游戏,可是Tom老是输,因此他怀疑这个游戏是不是有某种必胜策略,郁闷的Tom现在向你求救了,你能帮帮他么? 游戏规则是这样的: 如图所示,游戏在一个n行m ...
- Appium 自动化测试(1)--环境安装：安装Appium
一.安装nodejs Node.js安装包及源码下载地址为:https://nodejs.org/en/download/. 安装过程参考:http://www.runoob.com/nodejs/n ...
- array 数组去重 过滤空值等方法
去重操作 第一种方式, ES 6 引入的新书据结构 Set 本身就是没有重复数据的, 可以使用这个数据结构来转化数组.时间复杂度 O(n) 123456 const target = [];const ...
- echarts3使用总结2
接着上一篇文章补充一点项目中遇到的问题及解决方法 1.y轴正负轴调换 yAxis: { inverse: false, //y轴正负轴调换 }, 2.去掉图表背景线 yAxis: [ ...
- python中的apscheduler模块
1.简介 apscheduler是python中的任务定时模块,它包含四个组件:触发器(trigger),作业存储(job store),执行器(executor),调度器(scheduler). 2 ...
- 用SQL命令手工创建CDB
1.设置环境变量 $ export ORACLE_SID=ora12c $ export ORACLE_HOME=/home/oracle/product/12.1.0/db1 $ export ...