小白 の SSM 框架整合

Coredump
488 阅读2分钟

1. SSM 框架整合目录

SSM 基本的框架目录如下：

ssmDirectory.png

2. 数据库表 account

CREATE DATABASE ssm;
CREATE TABLE account(
    id INT PRIMARY KEY AUTO_INCREMENT,
    NAME VARCHAR(100),
    money DOUBLE
);
INSERT INTO account VALUES(1,"KangK",5000),(2,"Jane",5000);

3. java

3.1 Account

public class Account {
    private int id;
    private String name;
    private double money;

    @Override
    public String toString() {
        return "Account{" +
                "id=" + id +
                ", name='" + name + '\'' +
                ", money=" + money +
                '}';
    }

    public int getId() {
        return id;
    }

    public void setId(int 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;
    }
}

3.2 AccountMapper

public interface AccountMapper {

    List<Account> selectAll();

    void saveAccount(Account account);

}

3.3 AccountService

public interface AccountService {
    List<Account> findAll();

    void save(Account account);
}

3.4 AccountServiceImpl

@Service
@Transactional
public class AccountServiceImpl implements AccountService {

    @Autowired
    private AccountMapper accountMapper;

    @Override
    public List<Account> findAll() {
        // 简单实现，省略处理Service层的业务
        return accountMapper.selectAll();
    }

    @Override
    public void save(Account account) {
        // 简单实现，省略处理Service层的业务
        accountMapper.saveAccount(account);
    }
}

3.5 AccountController

package one.controller;

import one.domain.Account;
import one.service.AccountService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.servlet.ModelAndView;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.UnsupportedEncodingException;
import java.util.List;

/**
 * @Author _KunA
 * @Date 2021/8/14 8:56
 * @Description TODO
 */
@RequestMapping("/account")
@Controller
public class AccountController {

    @Autowired
    private AccountService accountService;

    @RequestMapping("/select")
//    @ResponseBody // 页面跳转无需使用@ResponseBody!
    public ModelAndView select(ModelAndView modelAndView, HttpServletRequest request, HttpServletResponse response) throws UnsupportedEncodingException {

        List<Account> accountLists = accountService.findAll();

        // 控制台打印数据库中所有数据!
        for (Account account : accountLists) {
            System.out.println(account);
        }

        // 向ModelAndView对象中写入accountLists(用于在accountList.jsp中取出页面)
        modelAndView.addObject("accountLists", accountLists);
        // MayBe here has some questions...
        modelAndView.setViewName("accountList");


        // 亟待解决：客户端<==>服务端 请求与响应数据(中文)乱码问题！
        // 设置客户端===>服务端发送请求的编码格式
//        request.setCharacterEncoding("UTF-8");
        // 设置服务端===>客户端响应数据的编码格式
//        response.setCharacterEncoding("UTF-8");
//        response.setContentType("text/html; charset=UTF-8");

        return modelAndView;
    }

    @RequestMapping(value = "/insert", method = RequestMethod.POST)
    public String update(Account account) {
        accountService.save(account);
        return "redirect:/account/select";
    }
}

4. resources

4.1 AccountMapper.xml

要明白 #{} 与 ${} 之间的区别，详见博客：juejin.cn/post/684490…

<?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="one.mapper.AccountMapper">

    <select id="selectAll" resultType="account">
        select * from account;
    </select>

    <insert id="saveAccount" parameterType="account">
        insert into account value(#{id}, #{name}, #{money});
    </insert>

</mapper>

4.2 applicationContext-spring.xml

🔥DataSource 一般用于以下三处：

  • JdbcTemplate
  • DataSourceTransactionManager：涉及事务管理
  • SqlSessionFactory：涉及 MyBatis 框架涉及
<?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">

    <!-- 1.组件扫描(Service层) -->
    <context:component-scan base-package="one.service"/>

    <!-- 2.导入 jdbc.properties -->
    <context:property-placeholder location="classpath:jdbc.properties"/>

    <!-- 3.配置数据源DataSource: Don't not use c3p0, please use DruidDataSource!-->
    <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}"/>
        <property name="initialSize" value="${jdbc.initialSize}"/>
    </bean>

    <!-- 4.配置 MyBatis 的 SqlSessionFactory!-->
    <bean class="org.mybatis.spring.SqlSessionFactoryBean">
        <!-- 注入数据源DataSource: 用于SqlSessionFactory连接数据库(还用于下文配置事务管理) -->
        <property name="dataSource" ref="dataSource"/>
        <!-- 指定 MyBatis 配置文件所在位置-->
        <property name="configLocation" value="classpath:SqlMapConfig.xml"/>
    </bean>

    <!-- 5.配置Mapper扫描器: 扫描Mapper所在的包，为Mapper创建实现类 -->
    <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        <!-- 此处的 one.mapper 是指 AccountMapper.java 的类路径 -->
        <property name="basePackage" value="one.mapper"/>
    </bean>

    <!-- 6.配置事务管理 -->
    <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
        <property name="dataSource" ref="dataSource"/>
    </bean>

    <!-- 7.开启事务注解: 搭配@Transactional -->
    <tx:annotation-driven transaction-manager="transactionManager"/>

</beans>

4.3 applicationContext-springmvc.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 http://www.springframework.org/schema/context/spring-context.xsd
                           http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd">

    <!-- 1.扫描Controller层组件 -->
    <context:component-scan base-package="one.controller"/>

    <!-- 2.配置视图解析器(InternalResourceViewResolver) -->
    <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name="prefix" value="/WEB-INF/view/"/>
        <property name="suffix" value=".jsp"/>
    </bean>

    <!-- 3.加载mvc注解驱动 -->
    <mvc:annotation-driven/>

    <!-- 4.开启静态资源访问 -->
    <mvc:default-servlet-handler/>

</beans>

4.4 jdbc.properties

jdbc.driver=com.mysql.cj.jdbc.Driver
jdbc.url=jdbc:mysql:///ssm?useUnicode=true&characterEncoding=UTF-8&serverTimezone=Asia/Shanghai
jdbc.username=root
jdbc.password=123456
#jdbc.maxTotal=30   // 最大连接数: 已被删除
#jdbc.maxIdle=10    // 最大空闲连接数: 不再使用
jdbc.initialSize=5

4.5 log4j.properties

### direct log messages to 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{ABSOLUTE} %5p %c{1}:%L - %m%n

### direct messages to file mylog.log ###
log4j.appender.file=org.apache.log4j.FileAppender
log4j.appender.file.File=D:\\Temp\\log4j
log4j.appender.file.layout=org.apache.log4j.PatternLayout
log4j.appender.file.layout.ConversionPattern=%d{ABSOLUTE} %5p %c{1}:%L - %m%n

### set log levels - for more verbose logging change 'info' to 'debug' ###

log4j.rootLogger=info, stdout

4.6 SqlMapConfig.xml

Spring 整合 MyBatis 时，MyBatis 核心配置文件大多数都被 Spring 配置文件所替代。

<?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>

    <!-- 导入 jdbc.properties -->
<!--    <properties resource="jdbc.properties"/>-->

    <!-- 别名 -->
    <typeAliases>
        <package name="one.domain"/>
    </typeAliases>

    <!-- 配置环境：被被applicationContext-spring.xml中的SqlSessionFactoryBean所替代！ -->
    <!-- SqlSessionFactoryBean注入了DataSource，所以可以直接连接到数据库！ -->
<!--    <environments default="mysql_dev">-->
<!--        <environment id="mysql_dev">-->
<!--            <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>-->

	<!-- 被applicationContext-spring.xml中的MapperScannerConfigurer所替代！ -->
<!--    <mappers>-->
<!--        <mapper resource="one/mapper/AccountMapper.xml"/>-->
<!--    </mappers>-->

</configuration>

5. webapp

5.1 web.xml

<?xml version="1.0" encoding="UTF-8"?>

<web-app version="2.4"
         xmlns="http://java.sun.com/xml/ns/j2ee"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd">

    <!--1.配置加载Spring文件的监听器-->
    <context-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>classpath:applicationContext-spring.xml</param-value>
    </context-param>
    <listener>
        <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
    </listener>

    <!-- 2.配置 Spring MVC 前端核心控制器 -->
    <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:applicationContext-springmvc.xml</param-value>
        </init-param>
        <!-- 配置服务器启动后立即加载 Spring MVC 配置文件 -->
        <load-on-startup>1</load-on-startup>
    </servlet>
    <servlet-mapping>
        <servlet-name>DispatcherServlet</servlet-name>
        <!-- /:拦截所有请求(除了jsp) -->
        <url-pattern>/</url-pattern>
    </servlet-mapping>

    <!-- 3.乱码过滤器 -->
    <filter>
        <filter-name>CharacterEncoding</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>CharacterEncoding</filter-name>
        <url-pattern>/**</url-pattern>
    </filter-mapping>

</web-app>

5.2 accountList.jsp

<%--
  Created by IntelliJ IDEA.
  User: 57715
  Date: 2021/8/14
  Time: 10:14
  To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<html>
<head>
    <title>page</title>
</head>
<body>
<h1>展示账户数据列表</h1>


<table border="1">
    <tr>
        <th>id</th>
        <th>name</th>
        <th>money</th>
    </tr>
    <c:forEach items="${accountLists}" var="account">
        <tr>
            <td>${account.id}</td>
            <td>${account.name}</td>
            <td>${account.money}</td>
        </tr>
    </c:forEach>
</table>
</body>
</html>

5.3 index.jsp

<%--
  Created by IntelliJ IDEA.
  User: 57715
  Date: 2021/8/14
  Time: 14:47
  To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>账户信息窗口</title>
</head>
<body>
    <h1>添加账户信息表单</h1>
    <form name="accountForm" action="${pageContext.request.contextPath}/account/insert" method="post" content="text/html; charset=UTF-8">
        <label>账户名称:<input type="text" name="name"></label><br>
        <label>账户金额:<input type="text" name="money"></label><br>
        <input type="submit" value="保存"><br>
    </form>
</body>
</html>

6. pom.xml

SSM 框架中基本使用得到的依赖大致如下：

<?xml version="1.0" encoding="UTF-8"?>
<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/maven-v4_0_0.xsd">

    <modelVersion>4.0.0</modelVersion>
    <packaging>war</packaging>

    <name>SSM_Latest</name>
    <groupId>com.one</groupId>
    <artifactId>SSM_Latest</artifactId>
    <version>1.0-SNAPSHOT</version>

    <dependencies>
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>8.0.13</version>
        </dependency>
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>druid</artifactId>
            <version>1.1.10</version>
        </dependency>
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>4.12</version>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>javax.servlet-api</artifactId>
            <version>3.0.1</version>
            <scope>provided</scope>
        </dependency>
        <dependency>
            <groupId>javax.servlet.jsp</groupId>
            <artifactId>javax.servlet.jsp-api</artifactId>
            <version>2.2.1</version>
            <scope>provided</scope>
        </dependency>
        <dependency>
            <groupId>jstl</groupId>
            <artifactId>jstl</artifactId>
            <version>1.2</version>
        </dependency>
        <dependency>
            <groupId>com.fasterxml.jackson.core</groupId>
            <artifactId>jackson-core</artifactId>
            <version>2.9.0</version>
        </dependency>
        <dependency>
            <groupId>com.fasterxml.jackson.core</groupId>
            <artifactId>jackson-databind</artifactId>
            <version>2.9.0</version>
        </dependency>
        <dependency>
            <groupId>com.fasterxml.jackson.core</groupId>
            <artifactId>jackson-annotations</artifactId>
            <version>2.9.0</version>
        </dependency>
        <dependency>
            <groupId>commons-fileupload</groupId>
            <artifactId>commons-fileupload</artifactId>
            <version>1.3.1</version>
        </dependency>
        <dependency>
            <groupId>commons-io</groupId>
            <artifactId>commons-io</artifactId>
            <version>2.3</version>
        </dependency>
        <dependency>
            <groupId>commons-logging</groupId>
            <artifactId>commons-logging</artifactId>
            <version>1.2</version>
        </dependency>
        <dependency>
            <groupId>org.slf4j</groupId>
            <artifactId>slf4j-log4j12</artifactId>
            <version>1.7.7</version>
        </dependency>
        <dependency>
            <groupId>log4j</groupId>
            <artifactId>log4j</artifactId>
            <version>1.2.17</version>
        </dependency>
        <dependency>
            <groupId>org.aspectj</groupId>
            <artifactId>aspectjweaver</artifactId>
            <version>1.8.2</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-jdbc</artifactId>
            <version>5.0.5.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-test</artifactId>
            <version>5.0.5.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-web</artifactId>
            <version>5.0.5.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-webmvc</artifactId>
            <version>5.0.5.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-tx</artifactId>
            <version>5.0.5.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis</artifactId>
            <version>3.5.6</version>
        </dependency>
        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis-spring</artifactId>
            <version>2.0.6</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-context</artifactId>
            <version>5.0.5.RELEASE</version>
        </dependency>
    </dependencies>

</project>

原创不易🧠 转载请标明出处🌊
若本文对你有所帮助，点赞支持嗷🔥

avatar
文章
阅读
粉丝