SSM框架整合笔记
源地址 ：https://blog.csdn.net/qq_41112238/article/details/104180699
ps.不要出门 戴好口罩
搭建环境
创建数据库和表
创建test数据库，建立一张账户表并插入3条数据记录
CREATE TABLE account(
id INT PRIMARY KEY AUTO_INCREMENT,
NAME VARCHAR(20),
money DOUBLE
);
INSERT INTO account(NAME,money) VALUES('kobe',1000),('james',2000),('davis',3000); 创建maven工程
新建一个maven工程
在最后一步点击＋号添加archetypeCatalog internal属性键值对，可以提高项目创建速度。
创建完成后，修改pom.xml文件，首先将编译版本改为1.8
之后导入相关依赖
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.12</version>
<scope>test</scope>
</dependency>
<!-- spring框架相关的依赖 -->
<!-- aop相关 -->
<dependency>
<groupId>org.aspectj</groupId>
<artifactId>aspectjweaver</artifactId>
<version>1.9.4</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-aop</artifactId>
<version>5.2.1.RELEASE</version>
</dependency>
<!-- context -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context</artifactId>
<version>5.2.1.RELEASE</version>
</dependency>
<!-- web -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-web</artifactId>
<version>5.2.1.RELEASE</version>
</dependency>
<!-- mvc -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<version>5.2.1.RELEASE</version>
</dependency>
<!-- 单元测试 -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-test</artifactId>
<version>5.2.1.RELEASE</version>
</dependency>
<!-- 事务 -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-tx</artifactId>
<version>5.2.1.RELEASE</version>
</dependency>
<!-- jdbc -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-jdbc</artifactId>
<version>5.2.1.RELEASE</version>
</dependency>
<!-- mysql-->
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>5.1.44</version>
</dependency>
<!-- servlet -->
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>servlet-api</artifactId>
<version>2.5</version>
<scope>provided</scope>
</dependency>
<!-- jsp -->
<dependency>
<groupId>javax.servlet.jsp</groupId>
<artifactId>jsp-api</artifactId>
<version>2.0</version>
<scope>provided</scope>
</dependency>
<!-- jstl -->
<dependency>
<groupId>jstl</groupId>
<artifactId>jstl</artifactId>
<version>1.2</version>
</dependency>
<!-- 日志相关 -->
<dependency>
<groupId>log4j</groupId>
<artifactId>log4j</artifactId>
<version>1.2.17</version>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-api</artifactId>
<version>1.7.5</version>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-log4j12</artifactId>
<version>1.6.6</version>
</dependency>
<!-- mybatis -->
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis</artifactId>
<version>3.4.5</version>
</dependency>
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis-spring</artifactId>
<version>1.3.0</version>
</dependency>
<!-- c3p0数据库连接池 -->
<dependency>
<groupId>c3p0</groupId>
<artifactId>c3p0</artifactId>
<version>0.9.1.2</version>
<type>jar</type>
<scope>compile</scope>
</dependency>
<!-- druid连接池-->
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>druid</artifactId>
<version>1.0.9</version>
</dependency> 之后在main文件夹下创建目录用来保存源代码和配置文件
创建和数据库account表对应的实体类Account
public class Account implements Serializable {
private Integer id;
private String name;
private Double money;
public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public Double getMoney() {
return money;
}
public void setMoney(Double money) {
this.money = money;
}
@Override
public String toString() {
return "Account{" +
"id=" + id +
", name='" + name + '\'' +
", money=" + money +
'}';
}
} 在resources目录下导入log4j配置文件
log4j.appender.std=org.apache.log4j.ConsoleAppender
log4j.appender.std.Target=System.err
log4j.appender.std.layout=org.apache.log4j.PatternLayout
log4j.appender.std.Conversion=%d{yyyy-MM-dd HH:mm:ss} %5p %c{1}:%L - %m%n
log4j.appender.file=org.apache.log4j.FileAppender
log4j.appender.file.File=mylog.log
log4j.appender.file.layout=org.apache.log4j.PatternLayout
log4j.appender.file.layout.Conversion=%d{ABSOLUTE} %5p %c{1}:%L - %m%n
log4j.rootLogger=debug,std,file 整合SpringMVC
1 创建web控制器
AccountController类：
@Controller
@RequestMapping("/account")
public class AccountController {
@RequestMapping("/findAll")
public String findAll(){
return "success";
}
}
2 配置mvc
先在webapp目录下创建css/img/js文件夹存放静态资源，在WEB-INF下新建pages文件夹存放jsp页面
在resources目录下创建mvc配置文件spring-mvc.xml
spring-mvc.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: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 https://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/mvc https://www.springframework.org/schema/mvc/spring-mvc.xsd">
<!-- 开启包扫描 -->
<context:component-scan base-package="com"/>
<!-- 注册视图解析器 -->
<bean id="internalResourceViewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<!--前缀配置 -->
<property name="prefix" value="/WEB-INF/pages/"/>
<!--后缀配置 -->
<property name="suffix" value=".jsp"/>
</bean>
<!-- 忽略静态资源 -->
<mvc:resources mapping="/img/**" location="/img/"/>
<mvc:resources mapping="/js/**" location="/js/"/>
<mvc:resources mapping="/css/**" location="/css/"/>
<!-- 开启注解驱动 -->
<mvc:annotation-driven/>
</beans> 3 配置web.xml
<!DOCTYPE web-app PUBLIC
"-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"
"http://java.sun.com/dtd/web-app_2_3.dtd" >
<web-app>
<display-name>ssm</display-name>
<!-- 配置编码过滤器 -->
<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-8</param-value>
</init-param>
</filter>
<filter-mapping>
<filter-name>encodingFilter</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
<!-- 配置前端控制器 -->
<servlet>
<servlet-name>dispatcherServlet</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<!-- 读取springmvc.xml -->
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:springmvc.xml</param-value>
</init-param>
<!-- 启动后加载 -->
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>dispatcherServlet</servlet-name>
<!--
/* 匹配所有资源
/ 匹配除jsp之外的所有资源
-->
<url-pattern>/</url-pattern>
</servlet-mapping>
<!-- 服务器启动主页 -->
<welcome-file-list>
<welcome-file>index.jsp</welcome-file>
</welcome-file-list>
</web-app> 4 测试
在pages文件夹下新建success.jsp
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
<title>Title</title>
</head>
<body>
<h1>启动成功</h1>
</body>
</html>
修改index.jsp
<%@ page contentType="text/html;charset=UTF-8" language="java" %> <html> <body> <h2>整合ssm</h2> <a href="account/findAll">test</a> </body> </html>
配置tomcat服务器
启动测试
点击test
优化SpringMVC整合（注入业务层）
1 创建service接口和实现类
接口：
public interface AccountService {
//查询所有账户
List<Account> findAll();
} 实现类：
@Service("accountService")
public class AccountServiceImpl implements AccountService {
@Override
public List<Account> findAll() {
System.out.println("accountService");
return null;
}
} 2 在控制器中注入service
使用@Autowired注解：
@Controller
@RequestMapping("/account")
public class AccountController {
@Autowired
private AccountService accountService;
@RequestMapping("/findAll")
public String findAll(){
accountService.findAll();
System.out.println("accountController");
return "success";
}
} 3 测试
成功调用了service层
整合Mybatis
1 创建dao接口
不需要具体实现类（由mybatis实现）
@Repository("accountDao")
public interface AccountDao {
//查询全部账户
@Select("select * from account")
List<Account> findAll();
} 2 配置mybatis
在resources目录下新建mybatis配置文件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>
<environments default="mysql">
<!-- 默认开发环境 -->
<environment id="mysql">
<transactionManager type="JDBC"/>
<dataSource type="POOLED">
<property name="driver" value="com.mysql.jdbc.Driver"/>
<property name="url" value="jdbc:mysql:///test?serverTimezone=UTC"/>
<property name="username" value="root"/>
<property name="password" value=""/>
</dataSource>
</environment>
</environments>
<!-- 使用的是注解 -->
<mappers>
<!-- 开启包扫描 该包下所有的dao接口都可以使用 -->
<package name="com.dao"/>
</mappers>
</configuration> 3 测试
新建test-java目录，并标记为测试目录
新建一个测试类
public class MybatisTest {
@Test
public void testFindAll(){
SqlSessionFactory factory = new SqlSessionFactoryBuilder().build(MybatisTest.class.getClassLoader().
getResourceAsStream("sqlMapConfig.xml"));
SqlSession sqlSession = factory.openSession();
AccountDao accountDao = sqlSession.getMapper(AccountDao.class);
List<Account> accounts = accountDao.findAll();
System.out.println(accounts);
}
}
进行测试：
优化mybatis整合
1 存在的问题
- 连接池是mybatis自带的 =>通过spring管理连接池
- sqlSessionFactory还是自己创建的 =>通过spring管理factory
- dao包扫描还是由mybatis加载的 =>通过spring扫描包
- 事务还是由mybatis管理的 =>通过spring管理事务
2 创建spring配置文件
在resources目录下新建springconfig文件spring-service.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:aop="http://www.springframework.org/schema/aop"
xmlns:tx="http://www.springframework.org/schema/tx"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans.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">
<!-- 注册数据源 -->
<bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource">
<property name="driverClassName" value="com.mysql.jdbc.Driver"/>
<property name="url" value="jdbc:mysql:///test?serverTimezone=UTC"/>
<property name="username" value="root"/>
<property name="password" value=""/>
</bean>
<!-- 注册sqlSessionFactory -->
<bean id="sessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
<!-- 注入上面配置的数据源 -->
<property name="dataSource" ref="dataSource"/>
<!-- 建议配置 导入sqlMapConfig.xml -->
<property name="configLocation" value="classpath:sqlMapConfig.xml"/>
</bean>
<!--扫描dao接口 -->
<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
<property name="basePackage" value="com.dao"/>
</bean>
<!-- 配置事务 -->
<!-- 配置事务管理器 -->
<bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
<property name="dataSource" ref="dataSource"/>
</bean>
<!--配置事务规则 -->
<tx:advice id="advice" transaction-manager="transactionManager">
<tx:attributes>
<tx:method name="*" read-only="false"/>
<tx:method name="find*" read-only="true"/>
</tx:attributes>
</tx:advice>
<!-- 配置aop -->
<aop:config>
<aop:pointcut id="pc1" expression="execution(* com.service.*.*(..))"/>
<aop:advisor advice-ref="advice" pointcut-ref="pc1"/>
</aop:config>
</beans> 3 在web.xml中配置
将初始化加载的配置文件改为spring*，可以匹配spring-mvc.xml和spring-service.xml
整合结果
查询账户
修改accountServiceImpl
@Service("accountService")
public class AccountServiceImpl implements AccountService {
@Autowired
private AccountDao accountDao;
@Override
public List<Account> findAll() {
List<Account> accounts = accountDao.findAll();
return accounts;
}
} 修改accountController
@Controller
@RequestMapping("/account")
public class AccountController {
@Autowired
private AccountService accountService;
@RequestMapping("/findAll")
public String findAll(){
List<Account> accounts = accountService.findAll();
request.setAttribute("accounts",accounts);
return "success";
}
} 启动服务器，进行测试
<stron>
</stron>
添加账户
修改dao接口，增加添加账户的接口
使用#{属性名}获取对应的属性值
//添加账户
@Insert("insert into account(name,money) values (#{name},#{money})")
void add(Account account); 修改service接口和实现类
//增加账户
void add(Account account); @Override
public void add(Account account) {
accountDao.add(account);
} 修改控制器
@RequestMapping("/add")
public String add(Account account){
accountService.add(account);
return "add";
} 添加add.jsp
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
<title>Title</title>
</head>
<body>
<h1>添加成功</h1>
</body>
</html> 修改index.jsp
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<body>
<h2>整合ssm</h2>
<a href="account/findAll">查询所有账户</a>
<form action="account/add" method="post">
name：<input type="text" name="name"><br>
money：<input type="text" name="money"><br>
<input type="submit" value="add account"><br>
</form>
</body>
</html> 启动服务器，填写表单，点击add account按钮。
添加成功后，返回上一步，再次查询
SSM整合小结
Controller
创建controller，定义方法，添加注解
创建spring-mvc.xml
- 开启包扫描 - 注册视图解析器 - 忽略静态资源 - 配置注解驱动
配置web.xml
- 配置前端控制器 - 配置编码过滤器
注入service
Service
创建service接口，实现类，注册（xml或注解）
创建spring-service.xml
- 注入数据源
- 配置事务管理器和事务
- 配置aop
注入dao
Dao
- 创建dao接口，定义方法，添加注解
- 注册数据源（4个基本项）
- 注册sqlSesisonFactory
- 开启dao包扫描（MapperScannerConfigurer）
项目整体结构
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