基礎(chǔ)環(huán)境搭配
1.創(chuàng)建一個(gè)maven工程
2.引入項(xiàng)目依賴的jar包
3.引入bootstrap,jquery
4.創(chuàng)建項(xiàng)目包結(jié)構(gòu)
5.編寫web.xml配置文件
6.編寫sping,springmvc,mybatis配置文件
7.創(chuàng)建數(shù)據(jù)庫(kù)表
CASCADE：父表delete、update的時(shí)候，子表會(huì)delete、update掉關(guān)聯(lián)記錄；
SET NULL：父表delete、update的時(shí)候，子表會(huì)將關(guān)聯(lián)記錄的外鍵字段所在列設(shè)為null，所以注意在設(shè)計(jì)表時(shí)外鍵不能設(shè)為not null；
RESTRICT：如果想要?jiǎng)h除父表的記錄時(shí)，而在子表中有關(guān)聯(lián)該父表的記錄，則不允許刪除父表中的記錄；NO ACTION：同 RESTRICT，也是首先先檢查外鍵；
8.使用mybatis逆向工程自動(dòng)生成dao接口以及mapper映射文件
1、創(chuàng)建一個(gè)maven工程
創(chuàng)建項(xiàng)目成功之后，可能會(huì)報(bào)錯(cuò)，右鍵項(xiàng)目名稱，選擇最下方的Properties
2.引入項(xiàng)目依賴的jar包
<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>4.0.0</modelVersion>
<groupId>com.igeek</groupId>
<artifactId>ssm</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>war</packaging>
<!--引入項(xiàng)目依賴的jar包 -->
<!-- SpringMVC、Spring -->
<!-- https://mvnrepository.com/artifact/org.springframework/spring-webmvc -->
<dependencies>
<!--引入pageHelper分頁(yè)插件 自己封裝過的那個(gè)分頁(yè)的bean-->
<dependency>
<groupId>com.github.pagehelper</groupId>
<artifactId>pagehelper</artifactId>
<version>5.0.0</version>
</dependency>
<!-- MBG .xml實(shí)體類-->
<!-- https://mvnrepository.com/artifact/org.mybatis.generator/mybatis-generator-core -->
<dependency>
<groupId>org.mybatis.generator</groupId>
<artifactId>mybatis-generator-core</artifactId>
<version>1.3.5</version>
</dependency>
<!-- springmvc的jar。。。 -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<version>4.3.7.RELEASE</version>
</dependency>
<!-- 返回json字符串的支持 -->
<!-- https://mvnrepository.com/artifact/com.fasterxml.jackson.core/jackson-databind -->
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-databind</artifactId>
<version>2.8.8</version>
</dependency>
<!--JSR303數(shù)據(jù)校驗(yàn)支持；tomcat7及以上的服務(wù)器，
tomcat7以下的服務(wù)器：el表達(dá)式。額外給服務(wù)器的lib包中替換新的標(biāo)準(zhǔn)的el
-->
<!-- https://mvnrepository.com/artifact/org.hibernate/hibernate-validator -->
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-validator</artifactId>
<version>5.4.1.Final</version>
</dependency>
<!-- Spring-Jdbc -->
<!-- https://mvnrepository.com/artifact/org.springframework/spring-jdbc -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-jdbc</artifactId>
<version>4.3.7.RELEASE</version>
</dependency>
<!--Spring-test -->
<!-- https://mvnrepository.com/artifact/org.springframework/spring-test -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-test</artifactId>
<version>4.3.7.RELEASE</version>
</dependency>
<!-- Spring面向切面編程 -->
<!-- https://mvnrepository.com/artifact/org.springframework/spring-aspects -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-aspects</artifactId>
<version>4.3.7.RELEASE</version>
</dependency>
<!--MyBatis -->
<!-- https://mvnrepository.com/artifact/org.mybatis/mybatis -->
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis</artifactId>
<version>3.4.2</version>
</dependency>
<!-- MyBatis整合Spring的適配包 -->
<!-- https://mvnrepository.com/artifact/org.mybatis/mybatis-spring -->
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis-spring</artifactId>
<version>1.3.1</version>
</dependency>
<!-- 數(shù)據(jù)庫(kù)連接池、驅(qū)動(dòng) -->
<!-- https://mvnrepository.com/artifact/c3p0/c3p0 -->
<dependency>
<groupId>c3p0</groupId>
<artifactId>c3p0</artifactId>
<version>0.9.1</version>
</dependency>
<!-- https://mvnrepository.com/artifact/mysql/mysql-connector-java -->
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>5.1.41</version>
</dependency>
<!-- （jstl，servlet-api，junit） -->
<!-- https://mvnrepository.com/artifact/jstl/jstl -->
<dependency>
<groupId>jstl</groupId>
<artifactId>jstl</artifactId>
<version>1.2</version>
</dependency>
<!-- https://mvnrepository.com/artifact/javax.servlet/javax.servlet-api -->
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>javax.servlet-api</artifactId>
<version>3.0.1</version>
<scope>provided</scope>
</dependency>
<!-- junit -->
<!-- https://mvnrepository.com/artifact/junit/junit -->
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.12</version>
</dependency>
</dependencies>
</project>
3.引入bootstrap,jquery
4.創(chuàng)建項(xiàng)目包結(jié)構(gòu)
包結(jié)構(gòu).PNG
5.編寫web.xml配置文件
<?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>ssm</display-name>
<welcome-file-list>
<welcome-file>index.html</welcome-file>
<welcome-file>index.htm</welcome-file>
<welcome-file>index.jsp</welcome-file>
<welcome-file>default.html</welcome-file>
<welcome-file>default.htm</welcome-file>
<welcome-file>default.jsp</welcome-file>
</welcome-file-list>
<!-- 配置監(jiān)聽器。當(dāng)前web應(yīng)用被加載的時(shí)候 幫你來創(chuàng)建spring的IOC容器對(duì)象
//當(dāng)前頁(yè)面 請(qǐng)求域 會(huì)話 服務(wù)器。。。
-->
<context-param>
<!-- 配置一個(gè)全局初始化參數(shù) 類執(zhí)行spring配置文件的位置 -->
<param-name>contextConfigLocation</param-name>
<param-value>classpath:applicationContext.xml</param-value>
</context-param>
<listener>
<!-- 注冊(cè)spring 監(jiān)聽，作用就是當(dāng)前項(xiàng)目被放到服務(wù)器上面
會(huì)自動(dòng)創(chuàng)建spring IOC容器對(duì)象，然后
-->
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
<!--2、springmvc的前端控制器，攔截所有請(qǐng)求 -->
<!-- The front controller of this Spring Web application, responsible for handling all application requests -->
<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:spingmvc.xml</param-value>
</init-param> -->
<load-on-startup>1</load-on-startup>
</servlet>
<!-- Map all requests to the DispatcherServlet for handling -->
<servlet-mapping>
<servlet-name>dispatcherServlet</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
<!-- 3、字符編碼過濾器，一定要放在所有過濾器之前 -->
<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>
<!-- 請(qǐng)求的編碼 -->
<init-param>
<param-name>forceRequestEncoding</param-name>
<param-value>true</param-value>
</init-param>
<init-param>
<!-- 響應(yīng)的編碼 -->
<param-name>forceResponseEncoding</param-name>
<param-value>true</param-value>
</init-param>
</filter>
<!-- 攔截所有請(qǐng)求 -->
<filter-mapping>
<filter-name>CharacterEncodingFilter</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
</web-app>
6.編寫sping,springmvc,mybatis配置文件
Springmvc
SpringMvc.PNG
<?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/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.3.xsd
http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.2.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.3.xsd">
<!--SpringMVC的配置文件，包含網(wǎng)站跳轉(zhuǎn)邏輯的控制，配置 -->
<context:component-scan base-package="com.igeek" use-default-filters="false">
<!--只掃描控制器。 -->
<context:include-filter type="annotation" expression="org.springframework.stereotype.Controller"/>
</context:component-scan>
<!--配置視圖解析器，方便頁(yè)面返回 -->
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="prefix" value="/WEB-INF/views/"></property>
<property name="suffix" value=".jsp"></property>
</bean>
<!--兩個(gè)標(biāo)準(zhǔn)配置 -->
<!-- 將springmvc不能處理的請(qǐng)求交給tomcat -->
<mvc:default-servlet-handler/>
<!-- 能支持springmvc更高級(jí)的一些功能，JSR303校驗(yàn)，快捷的ajax...映射動(dòng)態(tài)請(qǐng)求 -->
<mvc:annotation-driven/>
</beans>
Spring和Mybatis
注：Spring的配置文件為applicationContext.xml
Mybatis的配置文件為mybatis-config.xml
dbconfig.properties則存放連接數(shù)據(jù)庫(kù)的基本信息
mybatis.PNG
applicationContext.xml
<?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:aop="http://www.springframework.org/schema/aop"
xmlns:tx="http://www.springframework.org/schema/tx"
xsi:schemaLocation="http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.3.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-4.3.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.3.xsd">
<!-- 配置需要掃描的注解 。都交給springIOC容器 來統(tǒng)一管理 。。。 -->
<context:component-scan base-package="com.igeek">
<context:exclude-filter type="annotation"
expression="org.springframework.stereotype.Controller" />
</context:component-scan>
<!-- Spring的配置文件，這里主要配置和業(yè)務(wù)邏輯有關(guān)的 -->
<!--=================== 數(shù)據(jù)源，事務(wù)控制，xxx ================-->
<context:property-placeholder location="classpath:dbconfig.properties" />
<!-- c3p0 數(shù)據(jù)庫(kù)連接池 。。。 -->
<bean id="pooledDataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
<property name="jdbcUrl" value="${jdbc.jdbcUrl}"></property>
<property name="driverClass" value="${jdbc.driverClass}"></property>
<property name="user" value="${jdbc.user}"></property>
<property name="password" value="${jdbc.password}"></property>
</bean>
<!--================== 配置和MyBatis的整合=============== -->
<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
<!-- 指定mybatis全局配置文件的位置 -->
<property name="configLocation" value="classpath:mybatis-config.xml"></property>
<property name="dataSource" ref="pooledDataSource"></property>
<!-- 指定mybatis，mapper文件的位置 -->
<property name="mapperLocations" value="classpath:mapper/*.xml"></property>
</bean>
<!-- 配置掃描器，將mybatis接口的實(shí)現(xiàn)加入到ioc容器中 -->
<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
<!--掃描所有dao接口的實(shí)現(xiàn)，加入到ioc容器中 -->
<property name="basePackage" value="com.igeek.crud.dao"></property>
</bean>
<!-- 配置一個(gè)可以執(zhí)行批量的sqlSession -->
<bean id="sqlSession" class="org.mybatis.spring.SqlSessionTemplate">
<constructor-arg name="sqlSessionFactory" ref="sqlSessionFactory"></constructor-arg>
<constructor-arg name="executorType" value="BATCH"></constructor-arg>
</bean>
<!--============================================= -->
<!-- ===============事務(wù)控制的配置 ================-->
<bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
<!--控制住數(shù)據(jù)源 -->
<property name="dataSource" ref="pooledDataSource"></property>
</bean>
<!--開啟基于注解的事務(wù)，使用xml配置形式的事務(wù)（必要主要的都是使用配置式） -->
<aop:config>
<!-- 切入點(diǎn)表達(dá)式 -->
<aop:pointcut expression="execution(* com.igeek.crud.service..*(..))" id="txPoint"/>
<!-- 配置事務(wù)增強(qiáng) -->
<aop:advisor advice-ref="txAdvice" pointcut-ref="txPoint"/>
</aop:config>
<!--配置事務(wù)增強(qiáng)，事務(wù)如何切入 -->
<tx:advice id="txAdvice" transaction-manager="transactionManager">
<tx:attributes>
<!-- 所有方法都是事務(wù)方法 -->
<tx:method name="*"/>
<!--以get開始的所有方法 -->
<tx:method name="get*" read-only="true"/>
</tx:attributes>
</tx:advice>
<!-- Spring配置文件的核心點(diǎn)（數(shù)據(jù)源、與mybatis的整合，事務(wù)控制） -->
</beans>
dbconfig.properties
jdbc.jdbcUrl=jdbc:mysql://localhost:3306/ssm
jdbc.driverClass=com.mysql.jdbc.Driver
jdbc.user=root
jdbc.password=root123
mybatis-config.xml
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE configuration
PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
"http://mybatis.org/dtd/mybatis-3-config.dtd">
<configuration>
<settings>
<!-- 開啟駝峰命名規(guī)則 。。。 -->
<setting name="mapUnderscoreToCamelCase" value="true"/>
</settings>
<typeAliases>
<!-- 批量注冊(cè)別名。 -->
<package name="com.igeek.crud.bean"/>
</typeAliases>
<plugins>
<plugin interceptor="com.github.pagehelper.PageInterceptor">
<!--分頁(yè)參數(shù)合理化 -->
<property name="reasonable" value="true"/>
</plugin>
</plugins>
</configuration>
7.創(chuàng)建數(shù)據(jù)庫(kù)表
8.使用mybatis逆向工程自動(dòng)生成dao接口以及mapper映射文件
在項(xiàng)目下配置mbg.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>
<context id="DB2Tables" targetRuntime="MyBatis3">
<commentGenerator>
<property name="suppressAllComments" value="true" />
</commentGenerator>
<!-- 配置數(shù)據(jù)庫(kù)連接 -->
<jdbcConnection driverClass="com.mysql.jdbc.Driver"
connectionURL="jdbc:mysql://localhost:3306/ssm" userId="root"
password="root123">
</jdbcConnection>
<javaTypeResolver>
<property name="forceBigDecimals" value="false" />
</javaTypeResolver>
<!-- 指定javaBean生成的位置 -->
<javaModelGenerator targetPackage="com.igeek.crud.bean"
targetProject=".\src\main\java">
<property name="enableSubPackages" value="true" />
<property name="trimStrings" value="true" />
</javaModelGenerator>
<!--指定sql映射文件生成的位置 -->
<sqlMapGenerator targetPackage="mapper" targetProject=".\src\main\resources">
<property name="enableSubPackages" value="true" />
</sqlMapGenerator>
<!-- 指定dao接口生成的位置，mapper接口 -->
<javaClientGenerator type="XMLMAPPER"
targetPackage="com.igeek.crud.dao" targetProject=".\src\main\java">
<property name="enableSubPackages" value="true" />
</javaClientGenerator>
<!-- table指定每個(gè)表的生成策略 -->
<table tableName="employee" domainObjectName="Employee"></table>
<table tableName="department" domainObjectName="Department"></table>
</context>
</generatorConfiguration>
在包結(jié)構(gòu)下的test中，新建MBGTest.java文件
package com.igeek.crud.test;
import java.io.File;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import org.mybatis.generator.api.MyBatisGenerator;
import org.mybatis.generator.config.Configuration;
import org.mybatis.generator.config.xml.ConfigurationParser;
import org.mybatis.generator.exception.XMLParserException;
import org.mybatis.generator.internal.DefaultShellCallback;
public class MBGTest {
public static void main(String[] args) throws Exception {
// TODO Auto-generated method stub
List<String> warnings = new ArrayList<String>();
boolean overwrite = true;
File configFile = new File("mbg.xml");
ConfigurationParser cp = new ConfigurationParser(warnings);
Configuration config = cp.parseConfiguration(configFile);
DefaultShellCallback callback = new DefaultShellCallback(overwrite);
MyBatisGenerator myBatisGenerator = new MyBatisGenerator(config,
callback, warnings);
myBatisGenerator.generate(null);
}
}
運(yùn)行成功之后，會(huì)自動(dòng)在包結(jié)構(gòu)下的bean包中生成數(shù)據(jù)庫(kù)表對(duì)應(yīng)的實(shí)體類
在dao層中生成ssm封裝好的接口（其中包含了基本的增刪改查方法）
dao.PNG
所對(duì)應(yīng)的，他會(huì)在src/main/resources下的mapper中，生成接口所對(duì)應(yīng)的配置語(yǔ)句
mapper.PNG
配置好一切之后，便可進(jìn)行開發(fā)了，可以再test包中創(chuàng)建類測(cè)試一下，是否能成功連接數(shù)據(jù)庫(kù)，調(diào)用生成接口中的方法進(jìn)行增刪改查
package com.igeek.crud.test;
import java.util.UUID;
import org.apache.ibatis.session.SqlSession;
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;
import com.igeek.crud.bean.Department;
import com.igeek.crud.bean.Employee;
import com.igeek.crud.dao.DepartmentMapper;
import com.igeek.crud.dao.EmployeeMapper;
/*
* 使用spring的單元測(cè)試
*
*
* @ContextConfiguration主要作用就是用來指定spring配置文件的位置。
* 這個(gè)注解的作用 自動(dòng)幫你創(chuàng)建springIOC的容器對(duì)象
* @RunWith 表示如果說方法被@Test修飾 那么使用 spring 提供的單元測(cè)試類
* */
@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(locations={"classpath:applicationContext.xml"})
public class SpringTest {
@Autowired
private DepartmentMapper departmentMapper;
@Autowired
private EmployeeMapper employeeMapper;
@Autowired
private SqlSession sqlSession;
@Test
public void test1(){
//System.out.println(departmentMapper);
/*Department dept = new Department(10,"魚翅");
departmentMapper.insert(dept);*/
for (int i = 8; i < 1007; i++) {
EmployeeMapper mapper = sqlSession.getMapper(EmployeeMapper.class);
mapper.deleteByPrimaryKey(i);
}
//批量添加
/*for (int i = 0; i < 1000; i++) {
String uuid = UUID.randomUUID().toString().substring(0,5);
Employee emp = new Employee(null,uuid+"敖冠海","A",uuid+"qq.com",5);
EmployeeMapper mapper = sqlSession.getMapper(EmployeeMapper.class);
mapper.insertSelective(emp);
}*/
}
}
