SSM整合
课程任务目标
* 实现SSM框架整合
1.1 需求和步骤分析
需求
使用ssm框架完成对account表的增删改查操作。
步骤分析
1. 准备数据库和表记录
2. 创建web项目
3. 编写mybatis在ssm环境中可以单独使用
4. 编写spring在ssm环境中可以单独使用
5. spring整合mybatis
6. 编写springMVC在ssm环境中可以单独使用
7. spring整合springMVC
1.2 环境搭建
1）准备数据库和表记录
CREATE TABLE account (
id int(11) NOT NULL AUTO_INCREMENT,
name varchar(32) DEFAULT NULL,
money double DEFAULT NULL,
PRIMARY KEY (id)
) ENGINE=InnoDB AUTO_INCREMENT=3 DEFAULT CHARSET=utf8;
insert into account(id,name,money) values (1,'tom',1000),
(2,'jerry',1000);
2）创建web项目
1.3 编写mybatis在ssm环境中可以单独使用
需求：基于mybatis先来实现对account表的查询
1）相关坐标
<!--mybatis坐标-->
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>5.1.47</version>
</dependency>
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>druid</artifactId>
<version>1.1.15</version>
</dependency>
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis</artifactId>
<version>3.5.1</version>
</dependency>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.12</version>
</dependency>
2）Account实体
public class Account {
private Integer id;
private String name;
private Double money;
}
3）AccountDao接口
public interface AccountDao {
public List<Account> findAll();
}
4）AccountDao.xml映射
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
"http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="com.lagou.dao.AccountDao">
<select id="findAll" resultType="Account">
select * from account
</select>
</mapper>
5）mybatis核心配置文件
jdbc.properties
jdbc.driver=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql://localhost:3306/spring_db
jdbc.username=root
jdbc.password=root
SqlMapConfig.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>
<!--加载properties-->
<properties resource="jdbc.properties"/>
<!--类型别名配置-->
<typeAliases>
<package name="com.lagou.domain"/>
</typeAliases>
<!--环境配置-->
<environments default="mysql">
<!--使用MySQL环境-->
<environment id="mysql">
<transactionManager type="JDBC"/>
<dataSource type="POOLED">
<property name="driver" value="${jdbc.driver}"/>
<property name="url" value="${jdbc.url}"/>
<property name="username" value="${jdbc.username}"/>
<property name="password" value="${jdbc.password}"/>
</dataSource>
</environment>
</environments>
<!--加载映射-->
<mappers>
<package name="com.lagou.dao"/>
</mappers>
</configuration>
6）测试代码
public class MyBatisTest {
@Test
public void testMybatis() throws Exception {
// 加载核心配置文件
InputStream is = Resources.getResourceAsStream("SqlMapConfig.xml");
// 获得sqlsession工厂对象
SqlSessionFactory sqlSessionFactory = new
SqlSessionFactoryBuilder().build(is);
// 获得sqlsession会话对象
SqlSession sqlSession = sqlSessionFactory.openSession();
// 获得mapper代理对象
AccountDao accountDao = sqlSession.getMapper(AccountDao.class);
// 执行
List<Account> list = accountDao.findAll();
for (Account account : list) {
System.out.println(account);
}
// 释放资源
sqlSession.close();
}
}
1.4 编写spring在ssm环境中可以单独使用
1）相关坐标
<!--spring坐标-->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context</artifactId>
<version>5.1.5.RELEASE</version>
</dependency>
<dependency>
<groupId>org.aspectj</groupId>
<artifactId>aspectjweaver</artifactId>
<version>1.8.13</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-jdbc</artifactId>
<version>5.1.5.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-tx</artifactId>
<version>5.1.5.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-test</artifactId>
<version>5.1.5.RELEASE</version>
</dependency>
2）AccountService接口
public interface AccountService {
public List<Account> findAll();
}
3）AccountServiceImpl实现
@Service
public class AccountServiceImpl implements AccountService {
@Override
public List<Account> findAll() {
System.out.println("findAll执行了....");
return null;
}
}
4）spring核心配置文件
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:tx="http://www.springframework.org/schema/tx"
xmlns:aop="http://www.springframework.org/schema/aop"
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/tx
http://www.springframework.org/schema/tx/spring-tx.xsd
http://www.springframework.org/schema/aop
http://www.springframework.org/schema/aop/spring-aop.xsd">
<!--注解组件扫描-->
<context:component-scan base-package="com.lagou.service"/>
</beans>
5）测试代码
@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration("classpath:applicationContext.xml")
public class SpringTest {
@Autowired
private AccountService accountService;
@Test
public void testSpring() throws Exception {
List<Account> list = accountService.findAll();
System.out.println(list);
}
}
1.5 spring整合mybatis
1）整合思想
将mybatis接口代理对象的创建权交给spring管理，我们就可以把dao的代理对象注入到service中，此时也就完成了spring与mybatis的整合了。
2）导入整合包
<!--mybatis整合spring坐标-->
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis-spring</artifactId>
<version>1.3.1</version>
</dependency>
3）spring配置文件管理mybatis
注意：此时可以将mybatis主配置文件删除。
<?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:tx="http://www.springframework.org/schema/tx"
xmlns:aop="http://www.springframework.org/schema/aop"
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/tx
http://www.springframework.org/schema/tx/spring-tx.xsd
http://www.springframework.org/schema/aop
http://www.springframework.org/schema/aop/spring-aop.xsd">
<!--注解组件扫描-->
<context:component-scan base-package="com.lagou.service"/>
<!--spring整合mybatis-->
<context:property-placeholder location="classpath:jdbc.properties"/>
<bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource">
<property name="driverClassName" value="${jdbc.driver}"/>
<property name="url" value="${jdbc.url}"/>
<property name="username" value="${jdbc.username}"/>
<property name="password" value="${jdbc.password}"/>
</bean>
<!--SqlSessionFactory创建交给spring的IOC容器-->
<bean id="sqlSessionFactory"
class="org.mybatis.spring.SqlSessionFactoryBean">
<!--数据库环境配置-->
<property name="dataSource" ref="dataSource"/>
<!--类型别名配置-->
<property name="typeAliasesPackage" value="com.lagou.domain"/>
<!--如果要引入mybatis主配置文件，可以通过如下配置-->
<!--<property name="configLocation"
value="classpath:SqlMapConfig.xml"/>-->
</bean>
<!--映射接口扫描配置，由spring创建代理对象，交给IOC容器-->
<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
<property name="basePackage" value="com.lagou.dao"/>
</bean>
</beans>
4）修改AccountServiceImpl
@Service
public class AccountServiceImpl implements AccountService {
@Autowired
private AccountDao accountDao;
@Override
public List<Account> findAll() {
return accountDao.findAll();
}
}
1.6 编写springMVC在ssm环境中可以单独使用
需求：访问到controller里面的方法查询所有账户，并跳转到list.jsp页面进行列表展示
1）相关坐标
<!--springMVC坐标-->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<version>5.1.5.RELEASE</version>
</dependency>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>javax.servlet-api</artifactId>
<version>3.1.0</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>javax.servlet.jsp</groupId>
<artifactId>jsp-api</artifactId>
<version>2.2</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>jstl</groupId>
<artifactId>jstl</artifactId>
<version>1.2</version>
</dependency>
2）导入页面资源
3）前端控制器DispathcerServlet
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee
http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd"
version="3.1">
<!--前端控制器-->
<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:spring-mvc.xml</param-value>
</init-param>
<!-- 配置servlet随着应用加载创建 -->
<load-on-startup>2</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>DispatcherServlet</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
<!--post中文处理-->
<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>
</filter>
<filter-mapping>
<filter-name>CharacterEncodingFilter</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
</web-app>
4）AccountController和 list.jsp
@Controller
@RequestMapping("/account")
public class AccountController {
@RequestMapping("/findAll")
public String findAll(Model model) {
List<Account> list = new ArrayList<>();
list.add(new Account(1,"张三",1000d));
list.add(new Account(2,"李四",1000d));
model.addAttribute("list", list);
return "list";
}
}
<c:forEach items="${list}" var="account">
<tr>
<td>
<input type="checkbox" name="ids">
</td>
<td>${account.id}</td>
<td>${account.name}</td>
<td>${account.money}</td>
<td>
<a class="btn btn-default btn-sm" href="update.jsp">修改</a>
<a class="btn btn-default btn-sm" href="">删除</a>
</td>
</tr>
</c:forEach>
5）springMVC核心配置文件
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/mvc
http://www.springframework.org/schema/mvc/spring-mvc.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context.xsd">
<!--组件扫描-->
<context:component-scan base-package="com.lagou.controller"/>
<!--mvc注解增强-->
<mvc:annotation-driven/>
<!--视图解析器-->
<bean
class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="prefix" value="/"/>
<property name="suffix" value=".jsp"/>
</bean>
<!--实现静态资源映射-->
<mvc:default-servlet-handler/>
</beans>
1.7 spring整合springMVC
1）整合思想
spring和springMVC其实根本就不用整合，本来就是一家。
但是我们需要做到spring和web容器整合，让web容器启动的时候自动加载spring配置文件，web容器销毁的时候spring的ioc容器也销毁。
2）spring和web容器整合
ContextLoaderListener加载【掌握】
可以使用spring-web包中的ContextLoaderListener监听器，可以监听servletContext容器的创建和销毁，来同时创建或销毁IOC容器。
<!--spring 与 web容器整合-->
<listener>
<listener-class>
org.springframework.web.context.ContextLoaderListener
</listener-class>
</listener>
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:applicationContext.xml</param-value>
</context-param>
3）修改AccountController
@Controller
@RequestMapping("/account")
public class AccountController {
@Autowired
private AccountService accountService;
@RequestMapping("/findAll")
public String findAll(Model model) {
List<Account> list = accountService.findAll();
model.addAttribute("list", list);
return "list";
}
}
1.8 spring配置声明式事务
1）spring配置文件加入声明式事务
<!--事务管理器-->
<bean id="transactionManager"
class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
<property name="dataSource" ref="dataSource"></property>
</bean>
<!--开启事务注解支持-->
<tx:annotation-driven/>
@Service
@Transactional
public class AccountServiceImpl implements AccountService {
}
2）add.jsp
<form action="${pageContext.request.contextPath}/account/save" method="post">
<div class="form-group">
<label for="name">姓名：</label>
<input type="text" class="form-control" id="name" name="name"
placeholder="请输入姓名">
</div>
<div class="form-group">
<label for="age">余额：</label>
<input type="text" class="form-control" id="age" name="age"
placeholder="请输入余额">
</div>
<div class="form-group" style="text-align: center">
<input class="btn btn-primary" type="submit" value="提交" />
<input class="btn btn-default" type="reset" value="重置" />
<input class="btn btn-default" type="button" onclick="history.go(-1)"
value="返回" />
</div>
</form>
3）AccountController
@RequestMapping("/save")
public String save(Account account){
accountService.save(account);
return "redirect:/account/findAll";
}
4）AccountService接口和实现类
public void save(Account account);
@Service
@Transactional
public class AccountServiceImpl implements AccountService {
@Override
public void save(Account account) {
accountDao.save(account);
}
}
5）AccountDao
void save(Account account);
6）AccountDao.xml映射
<insert id="save" parameterType="Account">
insert into account (name, money) values (#{name}, #{money})
</insert>
1.9 修改操作
1.9.1 数据回显
① AccountController
@RequestMapping("/findById")
public String findById(Integer id, Model model) {
Account account = accountService.findById(id);
model.addAttribute("account", account);
return "update";
}
② AccountService接口和实现类
Account findById(Integer id);
@Override
public Account findById(Integer id) {
return accountDao.findById(id);
}
③ AccountDao接口和映射文件
Account findById(Integer id);
<select id="findById" parameterType="int" resultType="Account">
select * from account where id = #{id}
</select>
④ update.jsp
<form action="${pageContext.request.contextPath}/account/update" method="post">
<input type="hidden" name="id" value="${account.id}">
<div class="form-group">
<label for="name">姓名：</label>
<input type="text" class="form-control" id="name" name="name"
value="${account.name}" placeholder="请输入姓名">
</div>
<div class="form-group">
<label for="money">余额：</label>
<input type="text" class="form-control" id="money" name="money"
value="${account.money}" placeholder="请输入余额">
</div>
<div class="form-group" style="text-align: center">
<input class="btn btn-primary" type="submit" value="提交" />
<input class="btn btn-default" type="reset" value="重置" />
<input class="btn btn-default" type="button" onclick="history.go(-1)"
value="返回" />
</div>
</form>
1.9.2 账户更新
① AccountController
@RequestMapping("/update")
public String update(Account account){
accountService.update(account);
return "redirect:/account/findAll";
}
② AccountService接口和实现类
void update(Account account);
@Override
public void update(Account account) {
accountDao.update(account);
}
③ AccountDao接口和映射文件
void update(Account account);
<update id="update" parameterType="Account">
update account set name = #{name},money = #{money} where id = #{id}
</update>
1.10 批量删除
1）list.jsp
<script>
$('#checkAll').click(function () {
$('input[name="ids"]').prop('checked', $(this).prop('checked'));
})
$('#deleteBatchBtn').click(function () {
if (confirm('您确定要删除吗?')) {
if ($('input[name="ids"]:checked').length > 0) {
$('#deleteBatchForm').submit();
} else {
alert('想啥呢？')
}
}
})
</script>
2）AccountController
@RequestMapping("/deleteBatch")
public String deleteBatch(Integer[] ids) {
accountService.deleteBatch(ids);
return "redirect:/account/findAll";
}
3）AccountService接口和实现类
void deleteBatch(Integer[] ids);
@Override
public void deleteBatch(Integer[] ids) {
accountDao.deleteBatch(ids);
}
4）AccountDao接口和映射文件
void deleteBatch(Integer[] ids);
<delete id="deleteBatch" parameterType="int">
delete from account
<where>
<foreach collection="array" open="id in(" close=")" separator=","
item="id">
#{id}
</foreach>
</where>
</delete>
本文来自博客园，作者：寒露凝珠，转载请注明原文链接：https://www.cnblogs.com/china-soldier/p/15546471.html
