SSM(Spring+SpringMVC+MyBatis)框架集由Spring、SpringMVC、MyBatis三个开源框架整合而成,常作为数据源较简单的web项目的框架。
其中spring是一个轻量级的控制反转(IoC)和面向切面(AOP)的容器框架。
SpringMVC分离了控制器、模型对象、分派器以及处理程序对象的角色,这种分离让它们更容易进行定制。
MyBatis是一个支持普通SQL查询,存储过程和高级映射的优秀持久层框架。
- .idea文件夹和helloworld.iml是idea的一些配置文件,我们不用管,就算删了也没事,当然删了,重新打开项目,就得重新配置了
- src文件夹就是我们放项目代码的地方
- pom.xml是maven的配置文件,我们需要什么jar包,都可以在里面添加依赖,然后maven就会自己帮我们下到本地仓库里面
接下来就需要创建构思项目所需的文件结构,main下新建一个java,用来放java文件,src下新建一个test,用来放测试文件,main下新建一个resources文件夹,鼠标右键,找到make directory as,选择Resources root 如下图:
接下来继续完善项目结构:
- 在main的java文件夹上,鼠标右键,找到 make directory as,选择Sources root(如上图,下同)
- 在test的java文件夹上(如没有java文件,则手动创建,下同),鼠标右键,找到make directory as,选择Test Sources root
- 在test的resources文件夹上,鼠标右键,找到make directory as,选择Test Resources root
- src->main->java下新建package com,再新建package springmvc,这两个对应我们刚开始的groupid
- springmvc包下新建四个包,controller包用来放前台url映射文件,dao用来放与数据库的接口文件,entity用来放实体类文件,service用来放自己定义的接口
- applicationContext.xml是spring配置文件
- sqlmap文件夹里面放实体与数据库的映射文件
- generatorConfig.xml和generator.properties是mybatis的配置文件
- jdbc.properties是数据库相关信息
- log4j.properties是日志配置文件
- webapp下新建css、images等文件,用来放前端资源
- web-inf下新建views文件件,jsp文件就放这里面了
按照上面的流程修改后目录结构如下图:
配置Maven pom.xml,引入jar包
pom.xml主要描述了项目的maven坐标,依赖关系,开发者需要遵循的规则,缺陷管理系统,组织和licenses,以及其他所有的项目相关因素,是项目级别的配置文件。
这个是我配置前的pom.xml文件内容,还需要添加很多内容,继续看下面的文档
<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>4.0.0modelVersion>
<groupId>comgroupId>
<artifactId>testSSMartifactId>
<version>1.0-SNAPSHOTversion>
<packaging>warpackaging>
<name>testSSM Maven Webappname>
<url>http://www.example.comurl>
<properties>
<project.build.sourceEncoding>UTF-8project.build.sourceEncoding>
<maven.compiler.source>1.7maven.compiler.source>
<maven.compiler.target>1.7maven.compiler.target>
properties>
<dependencies>
<dependency>
<groupId>junitgroupId>
<artifactId>junitartifactId>
<version>4.11version>
<scope>testscope>
dependency>
dependencies>
<build>
<finalName>testSSMfinalName>
<pluginManagement>
<plugins>
<plugin>
<artifactId>maven-clean-pluginartifactId>
<version>3.1.0version>
plugin>
<plugin>
<artifactId>maven-resources-pluginartifactId>
<version>3.0.2version>
plugin>
<plugin>
<artifactId>maven-compiler-pluginartifactId>
<version>3.8.0version>
plugin>
<plugin>
<artifactId>maven-surefire-pluginartifactId>
<version>2.22.1version>
plugin>
<plugin>
<artifactId>maven-war-pluginartifactId>
<version>3.2.2version>
plugin>
<plugin>
<artifactId>maven-install-pluginartifactId>
<version>2.5.2version>
plugin>
<plugin>
<artifactId>maven-deploy-pluginartifactId>
<version>2.8.2version>
plugin>
plugins>
pluginManagement>
build>
project>
下面这个pom.xml是我添加了内容后的
改后的pom.xml
<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>4.0.0modelVersion>
<groupId>comgroupId>
<artifactId>testSSMartifactId>
<version>1.0-SNAPSHOTversion>
<packaging>warpackaging>
<name>testSSM Maven Webappname>
<url>http://www.example.comurl>
<properties>
<project.build.sourceEncoding>UTF-8project.build.sourceEncoding>
<maven.compiler.source>1.7maven.compiler.source>
<maven.compiler.target>1.7maven.compiler.target>
<spring.version>4.2.5.RELEASEspring.version>
<mybatis.version>3.2.4mybatis.version>
<slf4j.version>1.6.6slf4j.version>
<log4j.version>1.2.12log4j.version>
properties>
<dependencies>
<dependency>
<groupId>junitgroupId>
<artifactId>junitartifactId>
<version>4.11version>
<scope>testscope>
dependency>
<dependency>
<groupId>org.springframeworkgroupId>
<artifactId>spring-coreartifactId>
<version>${spring.version}version>
dependency>
<dependency>
<groupId>org.springframeworkgroupId>
<artifactId>spring-webartifactId>
<version>${spring.version}version>
dependency>
<dependency>
<groupId>org.springframeworkgroupId>
<artifactId>spring-oxmartifactId>
<version>${spring.version}version>
dependency>
<dependency>
<groupId>org.springframeworkgroupId>
<artifactId>spring-txartifactId>
<version>${spring.version}version>
dependency>
<dependency>
<groupId>org.springframeworkgroupId>
<artifactId>spring-jdbcartifactId>
<version>${spring.version}version>
dependency>
<dependency>
<groupId>org.springframeworkgroupId>
<artifactId>spring-webmvcartifactId>
<version>${spring.version}version>
dependency>
<dependency>
<groupId>org.springframeworkgroupId>
<artifactId>spring-aopartifactId>
<version>${spring.version}version>
dependency>
<dependency>
<groupId>org.springframeworkgroupId>
<artifactId>spring-context-supportartifactId>
<version>${spring.version}version>
dependency>
<dependency>
<groupId>org.springframeworkgroupId>
<artifactId>spring-testartifactId>
<version>${spring.version}version>
dependency>
<dependency>
<groupId>org.mybatisgroupId>
<artifactId>mybatisartifactId>
<version>${mybatis.version}version>
dependency>
<dependency>
<groupId>org.mybatisgroupId>
<artifactId>mybatis-springartifactId>
<version>1.2.2version>
dependency>
<dependency>
<groupId>mysqlgroupId>
<artifactId>mysql-connector-javaartifactId>
<version>5.1.29version>
dependency>
<dependency>
<groupId>javax.servletgroupId>
<artifactId>jstlartifactId>
<version>1.2version>
dependency>
<dependency>
<groupId>javax.servlet.jspgroupId>
<artifactId>jsp-apiartifactId>
<version>2.2.1-b03version>
<scope>providedscope>
dependency>
<dependency>
<groupId>javax.servletgroupId>
<artifactId>servlet-apiartifactId>
<version>2.5version>
<scope>providedscope>
dependency>
<dependency>
<groupId>com.fasterxml.jackson.coregroupId>
<artifactId>jackson-coreartifactId>
<version>2.7.1version>
dependency>
<dependency>
<groupId>com.fasterxml.jackson.coregroupId>
<artifactId>jackson-annotationsartifactId>
<version>2.7.1version>
dependency>
<dependency>
<groupId>com.fasterxml.jackson.coregroupId>
<artifactId>jackson-databindartifactId>
<version>2.7.1version>
dependency>
<dependency>
<groupId>net.sf.json-libgroupId>
<artifactId>json-libartifactId>
<version>2.4version>
<classifier>jdk15classifier>
dependency>
<dependency>
<groupId>commons-langgroupId>
<artifactId>commons-langartifactId>
<version>2.4version>
dependency>
<dependency>
<groupId>commons-logginggroupId>
<artifactId>commons-loggingartifactId>
<version>1.1version>
dependency>
<dependency>
<groupId>commons-poolgroupId>
<artifactId>commons-poolartifactId>
<version>1.5.6version>
dependency>
<dependency>
<groupId>commons-dbcpgroupId>
<artifactId>commons-dbcpartifactId>
<version>1.4version>
dependency>
<dependency>
<groupId>commons-beanutilsgroupId>
<artifactId>commons-beanutilsartifactId>
<version>1.8.3version>
dependency>
<dependency>
<groupId>commons-httpclientgroupId>
<artifactId>commons-httpclientartifactId>
<version>3.1version>
dependency>
<dependency>
<groupId>commons-collectionsgroupId>
<artifactId>commons-collectionsartifactId>
<version>3.1version>
dependency>
<dependency>
<groupId>commons-codecgroupId>
<artifactId>commons-codecartifactId>
<version>1.9version>
dependency>
<dependency>
<groupId>javax.annotationgroupId>
<artifactId>jsr250-apiartifactId>
<version>1.0version>
dependency>
<dependency>
<groupId>net.sf.ezmorphgroupId>
<artifactId>ezmorphartifactId>
<version>1.0.6version>
dependency>
<dependency>
<groupId>javax.activationgroupId>
<artifactId>activationartifactId>
<version>1.1version>
dependency>
<dependency>
<groupId>taglibsgroupId>
<artifactId>standardartifactId>
<version>1.1.2version>
dependency>
<dependency>
<groupId>log4jgroupId>
<artifactId>log4jartifactId>
<version>${log4j.version}version>
dependency>
<dependency>
<groupId>org.slf4jgroupId>
<artifactId>slf4j-apiartifactId>
<version>${slf4j.version}version>
dependency>
<dependency>
<groupId>org.slf4jgroupId>
<artifactId>slf4j-log4j12artifactId>
<version>${slf4j.version}version>
dependency>
<dependency>
<groupId>commons-fileuploadgroupId>
<artifactId>commons-fileuploadartifactId>
<version>1.3.1version>
dependency>
<dependency>
<groupId>commons-iogroupId>
<artifactId>commons-ioartifactId>
<version>2.4version>
dependency>
dependencies>
<build>
<finalName>testSSMfinalName>
<pluginManagement>
<plugins>
<plugin>
<artifactId>maven-clean-pluginartifactId>
<version>3.1.0version>
plugin>
<plugin>
<artifactId>maven-resources-pluginartifactId>
<version>3.0.2version>
plugin>
<plugin>
<artifactId>maven-compiler-pluginartifactId>
<version>3.8.0version>
plugin>
<plugin>
<artifactId>maven-surefire-pluginartifactId>
<version>2.22.1version>
plugin>
<plugin>
<artifactId>maven-war-pluginartifactId>
<version>3.2.2version>
plugin>
<plugin>
<artifactId>maven-install-pluginartifactId>
<version>2.5.2version>
plugin>
<plugin>
<artifactId>maven-deploy-pluginartifactId>
<version>2.8.2version>
plugin>
<plugin>
<groupId>org.mybatis.generatorgroupId>
<artifactId>mybatis-generator-maven-pluginartifactId>
<version>1.3.2version>
<configuration>
<verbose>trueverbose>
<overwrite>trueoverwrite>
configuration>
plugin>
plugins>
pluginManagement>
build>
project>
注意:如果有哪里显示红色报错,请检查settings.xml配置的是否正确(Maven里面的setting)如图我的setting路径。改完setting后,idea中的Maven会提示更新,更新后就没有红色报错了
改后的setting.xml(只留下了没有注释的内容),对照自己的setting文件进行修改即可
<settings xmlns="http://maven.apache.org/SETTINGS/1.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/SETTINGS/1.0.0 http://maven.apache.org/xsd/settings-1.0.0.xsd">
<localRepository>F:\apache-maven\mavanJarlocalRepository>
<pluginGroups>
pluginGroups>
<proxies>
<servers>
servers>
<mirrors>
<mirror>
<id>nexus-aliyunid>
<mirrorOf>centralmirrorOf>
<name>Nexus aliyunname>
<url>http://maven.aliyun.com/nexus/content/groups/publicurl>
mirror>
mirrors>
<profiles>
<profile>
<id>nexusid>
<repositories>
<repository>
<id>nexusid>
<name>local private nexusname>
<url>http://maven.oschina.net/content/groups/public/url>
<releases>
<enabled>trueenabled>
releases>
<snapshots>
<enabled>falseenabled>
snapshots>
repository>
repositories>
<pluginRepositories>
<pluginRepository>
<id>nexusid>
<name>local private nexusname>
<url>http://maven.oschina.net/content/groups/public/url>
<releases>
<enabled>trueenabled>
releases>
<snapshots>
<enabled>falseenabled>
snapshots>
pluginRepository>
pluginRepositories>
profile>
profiles>
settings>
配置jdbc.properties
driver=com.mysql.jdbc.Driver
url=jdbc:mysql://localhost:3306/mytest?useUnicode=true&characterEncoding=utf-8
username=root
#下面输入自己数据库的密码
password=***********
#定义初始连接数
initialSize=0
#定义最大连接数
maxActive=20
#定义最大空闲
maxIdle=20
#定义最小空闲
minIdle=1
#定义最长等待时间
maxWait=60000
配置applicationContext.xml
<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:beans="http://www.springframework.org/schema/beans"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-4.3.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-4.3.xsd
http://www.springframework.org/schema/mvc
http://www.springframework.org/schema/mvc/spring-mvc-4.3.xsd" >
<context:component-scan base-package="com.springmvc"/>
<mvc:annotation-driven />
<mvc:resources location="/images/" mapping="/images/**"/>
<mvc:resources location="/css/" mapping="/css/**"/>
<mvc:resources location="/js/" mapping="/js/**"/>
<bean class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter">
<property name="messageConverters">
<list>
<ref bean="mappingJacksonHttpMessageConverter"/>
list>
property>
bean>
<bean id="mappingJacksonHttpMessageConverter" class="org.springframework.http.converter.json.MappingJackson2HttpMessageConverter">
<property name="supportedMediaTypes">
<list>
<value>application/json;charset=UTF-8value>
list>
property>
bean>
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="viewClass" value="org.springframework.web.servlet.view.JstlView"/>
<property name="prefix" value="/WEB-INF/views/" />
<property name="suffix" value=".jsp" />
bean>
<property name="locations">
<list>
<value>classpath:jdbc.propertiesvalue>
list>
property>
bean>
<bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close">
<property name="driverClassName" value="${driver}"/>
<property name="url" value="${url}"/>
<property name="username" value="${username}"/>
<property name="password" value="${password}"/>
<property name="initialSize" value="1"/>
<property name="maxActive" value="100"/>
<property name="maxIdle" value="5"/>
<property name="maxWait" value="80000"/>
bean>
<bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
<property name="dataSource" ref="dataSource" />
bean>
<mvc:interceptors>
<bean class="org.springframework.web.servlet.i18n.LocaleChangeInterceptor" />
mvc:interceptors>
beans>
配置log4j.properties
Log4j是Apache的一个开源项目,通过使用Log4j,我们可以控制日志信息输送的目的地是控制台、文件、GUI组件,甚至是套接口服务器、NT的事件记录器、UNIX Syslog守护进程等;我们也可以控制每一条日志的输出格式;通过定义每一条日志信息的级别,我们能够更加细致地控制日志的生成过程。这些可以通过一个配置文件来灵活地进行配置,而不需要修改应用的代码。
### set log levels ###
log4j.rootLogger = INFO,D
###输出到控制台###
log4j.logger.toConsole=debug,stdout
log4j.appender.stdout = org.apache.log4j.ConsoleAppender
log4j.appender.stdout.Target = System.out
log4j.appender.stdout.layout = org.apache.log4j.PatternLayout
log4j.appender.stdout.layout.ConversionPattern =%d{yyyy-MM-dd HH\:mm\:ss} [%5p] - %c -%F(%L) -%m%n
### 输出到日志文件 ###
## 其中File 可以采用绝对路径 亦可以采用相对路径 catalina.home 是tomcat目录 如果没有logs文件夹 将会报错 ##
## 更加倾向于将日志文件放在 tomcat的日志目录下${catalina.home}/logs/salesmanb2bError.log ##
## 绝对路径如:e:/salesmanb2bError.log ##
log4j.logger.daily=INFO,D
log4j.appender.D = org.apache.log4j.DailyRollingFileAppender
log4j.appender.D.File = ${catalina.home}/logs/helloworld/helloworld.log
log4j.appender.D.Append = true
log4j.appender.D.Threshold = INFO
log4j.appender.D.layout = org.apache.log4j.PatternLayout
log4j.appender.D.layout.ConversionPattern =%d{yyyy-MM-dd HH\:mm\:ss} [%5p] - %c -%F(%L) -%m%n
##log4j.logger.org.apache.ibatis=debug,stdout
##log4j.logger.java.sql=debug,stdout
配置web.xml
<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_3_0.xsd" version="3.0">
<display-name>helloworlddisplay-name>
<filter>
<filter-name>encodingFilterfilter-name>
<filter-class>org.springframework.web.filter.CharacterEncodingFilterfilter-class>
<init-param>
<param-name>encodingparam-name>
<param-value>UTF-8param-value>
init-param>
<init-param>
<param-name>forceEncodingparam-name>
<param-value>trueparam-value>
init-param>
filter>
<filter-mapping>
<filter-name>encodingFilterfilter-name>
<url-pattern>/*url-pattern>
filter-mapping>
<servlet>
<servlet-name>springServletservlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServletservlet-class>
<init-param>
<param-name>contextConfigLocationparam-name>
<param-value> classpath:spring/applicationContext.xmlparam-value>
init-param>
<load-on-startup>1load-on-startup>
servlet>
<servlet-mapping>
<servlet-name>springServletservlet-name>
<url-pattern>/url-pattern>
servlet-mapping>
<listener>
<listener-class>
org.springframework.web.context.ContextLoaderListener
listener-class>
listener>
<servlet-mapping>
<servlet-name>defaultservlet-name>
<url-pattern>*.mdurl-pattern>
servlet-mapping>
<context-param>
<param-name>contextConfigLocationparam-name>
<param-value> classpath:spring/applicationContext.xmlparam-value>
context-param>
<welcome-file-list>
<welcome-file>/index.jspwelcome-file>
welcome-file-list>
<session-config>
<session-timeout>600session-timeout>
session-config>
web-app>
到这一步springmvc框架就基本搭好了,我们先运行检验一下,这就需要先配置tomcat
这里我们选择war exploded模式,网上关于这两个模式的解释是
war模式—-将WEB工程以包的形式上传到服务器
war exploded模式—-将WEB工程以当前文件夹的位置关系上传到服务器
on frame换成update classes and resources,这样修改了jsp页面不用重启服务器,实现热部署,然后点击OK,效果如下图
启动项目。启动成功了,但是发现路径是这样的,因为我们之前选择war exploded模式影响的
正常启动,这个时候springmvc已经完全配置好了.
先在spring文件里面增加SqlSessionFactory配置,将这个配置添加到applicationContext.xml文件里面
<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
<property name="dataSource" ref="dataSource"/>
<property name="mapperLocations" value="classpath:sqlmap/*Mapper.xml"/>
<property name="typeAliasesPackage" value="com.springmvc.entity" />
bean>
<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
<property name="basePackage" value="com.springmvc.dao"/>
<property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"/>
bean>
配置mybatis-generator添加到generatorConfig.xml文件
<generatorConfiguration>
<properties resource="generator.properties"/>
<classPathEntry
location="F:\apache-maven\mavanJar\mysql\mysql-connector-java\5.1.29\mysql-connector-java-5.1.29.jar" />
<context id="context1">
<commentGenerator>
<property name="suppressAllComments" value="true" />
<property name="suppressDate" value="true" />
commentGenerator>
<jdbcConnection driverClass="${driver}"
connectionURL="${url}"
userId="${username}"
password="${password}" />
<javaTypeResolver>
<property name="forceBigDecimals" value="false" />
javaTypeResolver>
<javaModelGenerator targetPackage="${modelPackage}"
targetProject="${modelProject}" />
<sqlMapGenerator targetPackage="${sqlPackage}" targetProject="${sqlProject}" />
<javaClientGenerator targetPackage="${mapperPackage}"
targetProject="${mapperProject}" type="XMLMAPPER" />
<table schema="" tableName="${table}" enableCountByExample="false"
enableUpdateByExample="false" enableDeleteByExample="false"
enableSelectByExample="false" selectByExampleQueryId="false"/>
context>
generatorConfiguration>
请注意的是上面的classPathEntry节点的location属性值是本地的mysql-connector-java.jar的位置,因为连接数据库是需要驱动的,我们用maven已经自动帮我们下好了jar包,在左边的External Libraries里面寻找JAR包的路径(下图帮你找寻路径)。
我们按照上图点击Copy Path,然后找到classPathEntry节点的location属性值Ctrl + v 更换为本地mysql jar包路径即可
配置generator.properties
这里面保存的是连接数据库的相关信息,是在使用mybatis-generator这个功能的时候用到的;其实在jdbc.properties是系统运行时用到的。这两个信息差不多,图方便的话,也可以将两个合并成一个文件,分开写的话,好实现可插拔。
driver=com.mysql.jdbc.Driver
url=jdbc:mysql://localhost:3306/mytest?useUnicode=true&characterEncoding=utf-8
username=root
password=*********
#entity 包名和 java目录
modelPackage=com.springmvc.entity
modelProject=src/main/java
#sqlmap包名 和resources目录
sqlPackage=sqlmap
sqlProject=src/main/resources
#mapper包名和 java目录
mapperPackage=com.springmvc.dao
mapperProject=src/main/java
table=message
modelPackage是等会连接数据库自动生成的实体类保存的位置,sqlPackage是生成xml映射文件保存的位置,mapperPackage是生成数据库接口保存的位置,table是数据库里面的表的名字
创建数据表
这样,我们需要再mytest数据库里创建一个测试用的表。
mybatis基本配置的差不多了,执行maven的mybatis-generator操作,尽管双击便是。
我当时出现一个问题就是找不到mybatis-generator,如果你也出现了这个问题,那就可以参考该博客解决:idea创建Maven项目时插件内看不到mybatis-generator问题解决
当日志中提示"BUILD SUCCESS"意为生成成功,成功以后会对应生成mapper.xml、dao层和entity层的文件,具体效果见下图:
如果写完一段代码,想去验证他的正确性,并不一定需要去启动tomcat跑跑看或者debug,这时我们就会想到可以使用测试工具来验证,这儿配置junit测试。 那就来测试一下刚生成的message接口有没有用,因为spring的标签,我们先去messagemapper文件加一个@Repository标签,表明它是数据访问组件,即DAO组件
如下图:
接下来就可以新建测试文件开始测试,将鼠标移到MessageMapper后(箭头所指方向),然后键盘上按下快捷键alt+enter键,接着create test
如下图:
选中需要测试的函数方法,点击OK,但是可以发现我这里没有显示测试函数方法,也不用着急,继续看下面
如果上面你有测试函数方法并且点击了,之后会在test目录下生成MessageMapperTest测试文件;如果是没有测试方法的我们就按照下面目录自己建一个
如下图:
测试就开始编写MessageMapperTest,编写测试代码。
package com.springmvc.dao;
import com.springmvc.entity.Message;
import org.junit.After;
import org.junit.Before;
import org.junit.Test;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
/**
* @author yzh
* @date 2019-08-19 14:50
*/
public class MessageMapperTest {
private ApplicationContext applicationContext;
@Autowired
private MessageMapper mapper;
@Before
public void setUp() throws Exception {
// 加载spring配置文件
applicationContext = new ClassPathXmlApplicationContext("classpath:spring/applicationContext.xml");
// 导入需要测试的
mapper = applicationContext.getBean(MessageMapper.class);
}
@After
public void tearDown() throws Exception {
}
@Test
public void insert() throws Exception {
Message message = new Message();
message.setCommand("前端");
message.setContent("后端");
message.setDescription("都会点");
int result = mapper.insert(message);
System.out.println(result);
assert (result == 1);
}
}
OK,这样就完成了测试类的编码,接下来运行test,右击这个绿色的小三角,然后运行。
如下图:
我们刷新一下数据库看有没有被插入。
到了这里,就算是成功了!如果中间哪里出现了问题可以联系我。