SSM 简单整合

其他 2019-10-26 10:28:26 阅读次数: 0
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本文链接： https://blog.csdn.net/qq_42121746/article/details/102502666

SSM 简单整合

1.1环境准备

1.1.1 创建数据库和表结构

create database ssm;
create table account(
id int primary key auto_increment,
name varchar(100),
money double(7,2),
);

创建maven工程：
在这里插入图片描述

  1. 创建ssm_parent父工程（打包方式选择pom，必须的）
  2. 创建ssm_web子模块（打包方式是war包）
  3. 创建ssm_service子模块（打包方式是jar包）
  4. 创建ssm_dao子模块（打包方式是jar包）
  5. 创建ssm_domain子模块（打包方式是jar包）
  6. web依赖于service，service依赖于dao，dao依赖于domain
  7. 在ssm_parent的pom.xml文件中引入坐标依赖
<properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <maven.compiler.source>1.8</maven.compiler.source>
        <maven.compiler.target>1.8</maven.compiler.target>
        <spring.version>5.0.2.RELEASE</spring.version>
        <slf4j.version>1.6.6</slf4j.version>
        <log4j.version>1.2.12</log4j.version>
        <mysql.version>5.1.6</mysql.version>
        <mybatis.version>3.4.5</mybatis.version>
    </properties>

    <dependencies>
        <!-- spring -->
        <dependency>
            <groupId>org.aspectj</groupId>
            <artifactId>aspectjweaver</artifactId>
            <version>1.6.8</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-aop</artifactId>
            <version>${spring.version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-context</artifactId>
            <version>${spring.version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-web</artifactId>
            <version>${spring.version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-webmvc</artifactId>
            <version>${spring.version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-test</artifactId>
            <version>${spring.version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-tx</artifactId>
            <version>${spring.version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-jdbc</artifactId>
            <version>${spring.version}</version>
        </dependency>
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>4.12</version>
            <scope>compile</scope>
        </dependency>
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>${mysql.version}</version>
        </dependency>
        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>servlet-api</artifactId>
            <version>2.5</version>
            <scope>provided</scope>
        </dependency>
        <dependency>
            <groupId>javax.servlet.jsp</groupId>
            <artifactId>jsp-api</artifactId>
            <version>2.0</version>
            <scope>provided</scope>
        </dependency>
        <dependency>
            <groupId>jstl</groupId>
            <artifactId>jstl</artifactId>
            <version>1.2</version>
        </dependency> <!-- log start -->
        <dependency>
            <groupId>log4j</groupId>
            <artifactId>log4j</artifactId>
            <version>${log4j.version}</version>
        </dependency>
        <dependency>
            <groupId>org.slf4j</groupId>
            <artifactId>slf4j-api</artifactId>
            <version>${slf4j.version}</version>
        </dependency>
        <dependency>
            <groupId>org.slf4j</groupId>
            <artifactId>slf4j-log4j12</artifactId>
            <version>${slf4j.version}</version>
        </dependency> <!-- log end -->
        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis</artifactId>
            <version>${mybatis.version}</version>
        </dependency>
        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis-spring</artifactId>
            <version>1.3.0</version>
        </dependency>
        <dependency>
            <groupId>c3p0</groupId>
            <artifactId>c3p0</artifactId>
            <version>0.9.1.2</version>
            <type>jar</type>
            <scope>compile</scope>
        </dependency>
    </dependencies>
    <build>
        <finalName>ssm</finalName>
        <pluginManagement>
            <plugins>
                <plugin>
                    <groupId>org.apache.maven.plugins</groupId>
                    <artifactId>maven-compiler-plugin</artifactId>
                    <version>3.2</version>
                    <configuration>
                        <source>1.8</source>
                        <target>1.8</target>
                        <encoding>UTF-8</encoding>
                        <showWarnings>true</showWarnings>
                    </configuration>
                </plugin>
            </plugins>
        </pluginManagement>
    </build>
  1. 部署ssm_web的项目，只要把ssm_web项目加入到tomcat服务器中即可

编写实体类，在ssm_domain项目中编写
在这里插入图片描述

package com.liuwk.domain;

import java.io.Serializable;

public class Account implements Serializable {
    private static final long serialVersionUID = 7355810572012650248L;
    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{" +
                "name='" + name + '\'' +
                ", money=" + money +
                '}';
    }
}
  1. 编写dao接口
package com.liuwk.dao;

import com.liuwk.domain.Account;
import org.apache.ibatis.annotations.Insert;
import org.apache.ibatis.annotations.Select;
import org.springframework.stereotype.Repository;

import java.util.List;

@Repository
public interface AccountDao {
    @Insert(value = "insert into account (name,money) values (#{name},#{money})")
    public void saveAccount(Account account);

    @Select("select * from account")
    public List<Account> findAll();
}
  1. 编写service接口和实现类
package com.liuwk.service;

import com.liuwk.domain.Account;

import java.util.List;

public interface AccountService {
    public void saveAccount(Account account);

    public List<Account> findAll();
}


package com.liuwk.service.impl;

import com.liuwk.dao.AccountDao;
import com.liuwk.domain.Account;
import com.liuwk.service.AccountService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.util.List;

@Service("accountService")
public class AccountServiceImpl implements AccountService {
    @Autowired
    private AccountDao accountDao;

    public void saveAccount(Account account) {
        accountDao.saveAccount(account);
    }

    public List<Account> findAll() {
        System.out.println("业务层：查询所有账户...");
        List<Account> list = accountDao.findAll();
        return list;
    }
}

Spring框架代码的编写

1. 搭建和测试Spring的开发环境

  1. 在ssm_web项目中创建applicationContext.xml的配置文件，编写具体的配置信息。
<?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/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/aop
       http://www.springframework.org/schema/aop/spring-aop.xsd
http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd"> <!-- 开启注解扫描，要扫描的是service和dao层的注解，要忽略web层注解，因为web层让SpringMVC框架 去管理 -->
    <context:component-scan base-package="com.liuwk"> <!-- 配置要忽略的注解 -->
        <context:exclude-filter type="annotation" expression="org.springframework.stereotype.Controller"/>
    </context:component-scan>
<beans/>

在ssm_web项目中编写测试方法，进行测试

package com.liuwk.test;

import com.liuwk.service.AccountService;
import org.junit.Test;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

public class ServiceTest {
    @Test
    public void run1() {
        ApplicationContext ac = new ClassPathXmlApplicationContext("classpath:applicationContext.xml");
        AccountService as = (AccountService) ac.getBean("accountService");
        as.findAll();
    }
}

Spring整合SpringMVC框架

1. 搭建和测试SpringMVC的开发环境

  1. 在web.xml中配置DispatcherServlet前端控制器
  2. 在web.xml中配置DispatcherServlet过滤器解决中文乱码
<!-- 配置解决中文乱码的过滤器 -->
    <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>

    <!-- 配置前端控制器：服务器启动必须加载，需要加载springmvc.xml配置文件 -->
    <servlet>
        <servlet-name>dispatcherServlet</servlet-name>
        <servlet-class>org.springframework.web.servlet.DispatcherServlet
        </servlet-class> <!-- 配置初始化参数，创建完DispatcherServlet对象，加载springmvc.xml配置文件 -->
        <init-param>
            <param-name>contextConfigLocation</param-name>
            <param-value>classpath:springmvc.xml</param-value>
        </init-param> <!-- 服务器启动的时候，让DispatcherServlet对象创建 -->
        <load-on-startup>1</load-on-startup>
    </servlet>
    <servlet-mapping>
        <servlet-name>dispatcherServlet</servlet-name>
        <url-pattern>/</url-pattern>
    </servlet-mapping>
  1. 创建springmvc.xml的配置文件，编写配置文件
<?xml version="1.0" encoding="UTF-8"?>
<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"> <!-- 扫描controller的注解，别的不扫描 -->
    <context:component-scan base-package="com.liuwk">
        <context:include-filter type="annotation" expression="org.springframework.stereotype.Controller"/>
    </context:component-scan> <!-- 配置视图解析器 -->
    <bean id="viewResolver"
          class="org.springframework.web.servlet.view.InternalResourceViewResolver"> <!-- JSP文件所在的目录 -->
        <property name="prefix" value="/WEB-INF/pages/"/> <!-- 文件的后缀名 -->
        <property name="suffix" value=".jsp"/>
    </bean> <!-- 设置静态资源不过滤 -->
    <mvc:resources location="/css/" mapping="/css/**"/>
    <mvc:resources location="/images/" mapping="/images/**"/>
    <mvc:resources location="/js/" mapping="/js/**"/> <!-- 开启对SpringMVC注解的支持 -->
    <mvc:annotation-driven/>
</beans>
  1. 测试SpringMVC的框架搭建是否成功
    1.1 编写index.jsp和list.jsp编写，超链接
    index.jsp
<%@ page language="java" contentType="text/html; charset=UTF-8"
         pageEncoding="UTF-8" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
"http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
    <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
    <title>主页</title>
</head>
<body>
<a href="account/findAll">访问查询账户</a>
<hr/>
<form action="account/saveAccount" method="post">
    账户名称：<input type="text" name="name"/><br/>
    账户金额：<input type="text" name="money"><br/>
    <input type="submit" value="保存"/>
</form>
</body>
</html>

list.jsp

<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>Title</title>
</head>
<body>
<h1>list.jsp</h1>
</body>
</html>

1.2 创建AccountController类，编写方法，进行测试

import org.springframework.web.bind.annotation.RequestMapping;

import java.util.List;

@Controller
@RequestMapping("/account")
public class AccountController {

    /*** 查询所有的数据 * @return */
    @RequestMapping("/findAll")
    public String findAll() {
        System.out.println("表现层：查询所有账户...");
        return "list";
    }

    @RequestMapping("/saveAccount")
    public String saveAccount(Account account) {
        return "list";
    }
}

2. Spring整合SpringMVC的框架

  1. 目的：在controller中能成功的调用service对象中的方法。
  2. 在项目启动的时候，就去加载applicationContext.xml的配置文件，在web.xml中配置
    ContextLoaderListener监听器（该监听器只能加载WEB-INF目录下的applicationContext.xml的配置文
    件）。
<!-- 配置Spring的监听器 -->
    <listener>
        <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
    </listener> <!-- 配置加载类路径的配置文件 -->
    <context-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>classpath:applicationContext.xml</param-value>
    </context-param>
  1. 在controller中注入service对象，调用service对象的方法进行测试
@Controller
@RequestMapping("/account")
public class AccountController {
    @Autowired
    private AccountService accountService;

    /*** 查询所有的数据 * @return */
    @RequestMapping("/findAll")
    public String findAll() {
        System.out.println("表现层：查询所有账户...");
        List<Account> list = accountService.findAll();
        for (Account account : list) {
            System.out.println(account);
        }
        return "list";
    }

    @RequestMapping("/saveAccount")
    public String saveAccount(Account account) {
        accountService.saveAccount(account);
        return "list";
    }
}

Spring整合MyBatis框架

1. 搭建和测试MyBatis的环境

  1. 在web项目中编写SqlMapConfig.xml的配置文件，编写核心配置文件
<?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">
        <environment id="mysql">
            <transactionManager type="JDBC"/>
            <dataSource type="POOLED">
                <property name="driver" value="com.mysql.jdbc.Driver"/>
                <property name="url" value="jdbc:mysql:///ssm"/>
                <property name="username" value="root"/>
                <property name="password" value="root"/>
            </dataSource>
        </environment>
    </environments> <!-- 使用的是注解 -->
    <mappers> <!-- <mapper class="cn.itcast.dao.AccountDao"/> --> <!-- 该包下所有的dao接口都可以使用 -->
        <package name="com.liuwk.dao"/>
    </mappers>
</configuration>
  1. 在AccountDao接口的方法上添加注解，编写SQL语句
package com.liuwk.dao;

import com.liuwk.domain.Account;
import org.apache.ibatis.annotations.Insert;
import org.apache.ibatis.annotations.Select;
import org.springframework.stereotype.Repository;

import java.util.List;

@Repository
public interface AccountDao {
    @Insert(value = "insert into account (name,money) values (#{name},#{money})")
    public void saveAccount(Account account);

    @Select("select * from account")
    public List<Account> findAll();
}
  1. 编写测试的方法
package com.liuwk.test;

import java.io.InputStream;
import java.util.List;

import com.liuwk.dao.AccountDao;
import com.liuwk.domain.Account;
import org.apache.ibatis.io.Resources;
import org.apache.ibatis.session.SqlSession;
import org.apache.ibatis.session.SqlSessionFactory;
import org.apache.ibatis.session.SqlSessionFactoryBuilder;
import org.junit.Test;

public class Demo1 {
    @Test
    public void run1() throws Exception {
        // 加载配置文件
        InputStream inputStream = Resources.getResourceAsStream("SqlMapConfig.xml");
        // 创建工厂
        SqlSessionFactory factory = new SqlSessionFactoryBuilder().build(inputStream);
        // 创建sqlSession对象
        SqlSession session = factory.openSession(); // 获取代理对象
        AccountDao dao = session.getMapper(AccountDao.class);
        // 调用查询的方法
        List<Account> list = dao.findAll();
        for (Account account : list) {
            System.out.println(account);
        }
        // 释放资源
        session.close();
        inputStream.close();
    }

    @Test
    public void run2() throws Exception {
        Account account = new Account();
        account.setName("熊大");
        account.setMoney(400d);
        // 加载配置文件
        InputStream inputStream = Resources.getResourceAsStream("SqlMapConfig.xml");
        // 创建工厂
        SqlSessionFactory factory = new SqlSessionFactoryBuilder().build(inputStream);
        // 创建sqlSession对象
        SqlSession session = factory.openSession();
        // 获取代理对象
        AccountDao dao = session.getMapper(AccountDao.class);
        dao.saveAccount(account);
        // 提交事务
        session.commit();
        // 释放资源
        session.close();
        inputStream.close();
    }
}

2. Spring整合MyBatis框架

  1. 目的：把SqlMapConfig.xml配置文件中的内容配置到applicationContext.xml配置文件中
  2. 在AccountDao接口中添加@Repository注解
  3. 在service中注入dao对象，进行测试
  4. 配置Spring的声明式事务管理
<?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/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/aop
       http://www.springframework.org/schema/aop/spring-aop.xsd
http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd"> <!-- 开启注解扫描，要扫描的是service和dao层的注解，要忽略web层注解，因为web层让SpringMVC框架 去管理 -->
    <context:component-scan base-package="com.liuwk"> <!-- 配置要忽略的注解 -->
        <context:exclude-filter type="annotation" expression="org.springframework.stereotype.Controller"/>
    </context:component-scan>

    <!-- 配置C3P0的连接池对象 -->
    <bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
        <property name="driverClassName" value="com.mysql.jdbc.Driver"/>
        <property name="url" value="jdbc:mysql:///ssm"/>
        <property name="username" value="root"/>
        <property name="password" value="root"/>
    </bean> <!-- 配置SqlSession的工厂 -->
    <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
        <property name="dataSource" ref="dataSource"/>
    </bean> <!-- 配置扫描dao的包 -->
    <bean id="mapperScanner" class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        <property name="basePackage" value="com.liuwk.dao"/>
    </bean>
    <bean id="transactionManager"
          class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
        <property name="dataSource" ref="dataSource"></property>
    </bean>

    <tx:advice id="txAdvice" transaction-manager="transactionManager">
        <tx:attributes>
            <tx:method name="*" propagation="REQUIRED" read-only="false"/>
            <tx:method name="find*" propagation="SUPPORTS" read-only="true"/>
        </tx:attributes>
    </tx:advice>
    <!-- 配置 aop -->
    <aop:config>
        <!-- 配置切入点表达式 -->
        <aop:pointcut expression="execution(* com.liuwk.service.impl.*.*(..))"
                      id="pt1"/>
        <!-- 建立通知和切入点表达式的关系 -->
        <aop:advisor advice-ref="txAdvice" pointcut-ref="pt1"/>
    </aop:config>
</beans>

测试保存帐户的方法
在这里插入图片描述

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