JavaEE(SSM框架，黑马程序员) P193~P201 完结

Posted 2022-03-22 Scean周

一、SSM框架整合

1.1 原始方式整合

1.准备工作

2.创建Maven工程

3.导入Maven坐标

           <!--spring相关-->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-context</artifactId>
            <version>5.0.5.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>org.aspectj</groupId>
            <artifactId>aspectjweaver</artifactId>
            <version>1.8.7</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-tx</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-webmvc</artifactId>
            <version>5.0.5.RELEASE</version>
        </dependency>

        <!--servlet和jsp-->
        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>servlet-api</artifactId>
            <version>2.5</version>
        </dependency>
        <dependency>
            <groupId>javax.servlet.jsp</groupId>
            <artifactId>jsp-api</artifactId>
            <version>2.0</version>
        </dependency>

        <!--mybatis相关-->
        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis</artifactId>
            <version>3.4.5</version>
        </dependency>
        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis-spring</artifactId>
            <version>1.3.1</version>
        </dependency>
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>5.1.6</version>
        </dependency>
        <dependency>
            <groupId>c3p0</groupId>
            <artifactId>c3p0</artifactId>
            <version>0.9.1.2</version>
        </dependency>
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>4.12</version>
        </dependency>
        <dependency>
            <groupId>jstl</groupId>
            <artifactId>jstl</artifactId>
            <version>1.2</version>
        </dependency>
        <dependency>
            <groupId>log4j</groupId>
            <artifactId>log4j</artifactId>
            <version>1.2.17</version>
        </dependency>
    </dependencies>

4.编写实体类

public class Account 
    private int id;
    private String name;
    private double money;
    //省略getter和setter方法

5.编写Mapper接口

public interface AccountMapper 
    //保存账户数据
    void save(Account account);
    //查询账户数据
    List<Account> findAll();

6.编写Service接口

public interface AccountService 
    void save(Account account); //保存账户数据
    List<Account> findAll(); //查询账户数据

7.编写Service接口实现

@Service("accountService")
public class AccountServiceImpl implements AccountService 
    public void save(Account account) 
        SqlSession sqlSession = MyBatisUtils.openSession();
        AccountMapper accountMapper = sqlSession.getMapper(AccountMapper.class);
        accountMapper.save(account);
        sqlSession.commit();
        sqlSession.close();
    
    public List<Account> findAll() 
        SqlSession sqlSession = MyBatisUtils.openSession();
        AccountMapper accountMapper = sqlSession.getMapper(AccountMapper.class);
        return accountMapper.findAll();
    

MyBatisUtils.java

public class MyBatisUtils 
    public static SqlSession openSession() throws IOException 
        InputStream resourceAsStream = Resources.getResourceAsStream("SqlMapConfig.xml");
        SqlSessionFactory sqlSessionFactory = new SqlSessionFactoryBuilder().build(resourceAsStream);
        SqlSession sqlSession = sqlSessionFactory.openSession();
        return sqlSession;
    

8.编写Controller

@Controller
@RequestMapping("/account")
public class AccountController 
    @Autowired
    private AccountService accountService;
    
    //保存
    //produces = "text/html;charset=UTF-8" 解决中文乱码
    @RequestMapping("/save",produces = "text/html;charset=UTF-8")
    @ResponseBody
    public String save(Account account) 
        accountService.save(account);
        return "保存成功";
    
    //查询
    @RequestMapping("/findAll")
    public ModelAndView findAll()
        ModelAndView modelAndView = new ModelAndView();
        modelAndView.setViewName("accountList");
        modelAndView.addObject("accountList",accountService.findAll());
        return modelAndView;
    

9.编写添加页面

<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>Title</title>
</head>
<body>
    <h1>保存账户信息表单</h1>
    <form action="$pageContext.request.contextPath/account/save" method="post">
        用户名称<input type="text" name="name"><br/>
        账户金额<input type="text" name="money"><br/>
        <input type="submit" value="保存"><br/>
    </form>
</body>
</html>

10.编写列表页面

<table border="1">
    <tr>
        <th>账户id</th>
        <th>账户名称</th>
        <th>账户金额</th>
    </tr>
    <c:forEach items="$accountList" var="account">
        <tr>
            <td>$account.id</td>
            <td>$account.name</td>
            <td>$account.money</td>
        </tr>
    </c:forEach>
</table>

11.编写相应配置文件

•Spring配置文件：applicationContext.xml

<!--   组件扫描 扫描service和mapper-->
    <context:component-scan base-package="com.itheima">
        <!--        排除controller的扫描,主要在spring-mvc配置-->
        <context:exclude-filter type="annotation" expression="org.springframework.stereotype.Controller"/>
    </context:component-scan>

•SprngMVC配置文件：spring-mvc.xml

    <!--    1、mvc注解驱动-->
    <mvc:annotation-driven/>

    <!--    2、配置内部资源视图解析器-->
    <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <!--        前缀-->
        <property name="prefix" value="/WEB-INF/pages/"></property>
        <!--        后缀-->
        <property name="suffix" value=".jsp"></property>
    </bean>

    <!--    3、开放静态资源权限-->
    <mvc:default-servlet-handler/>

    <!--    4、注解的组件扫描 主要扫描controller-->
    <context:component-scan base-package="com.itheima.controller">

    </context:component-scan>

•MyBatis映射文件：AccountMapper.xml

<?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.itheima.mapper.AccountMapper">

    <insert id="save" parameterType="account">
        insert into account
        values (#id, #name, #money)
    </insert>

    <select id="findAll" resultType="account">
        select *
        from account
    </select>

</mapper>

•MyBatis核心文件：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>

    <!--    加载外部properties-->
    <properties resource="jdbc.properties"></properties>

    <!--自定义别名-->
    <typeAliases>
        <!--        <typeAlias type="com.itheima.domain.Account" alias="account"></typeAlias>-->
        <package name="com.itheima.domain"></package>
    </typeAliases>

    <!--    配置环境-->
    <environments default="developement">
        <environment id="developement">
            <transactionManager type="JDBC"></transactionManager>
            <dataSource type="POOLED">
                <property name="driver" value="$jdbc.driver"/>
                <property name="url" value="$jdbc.url"/>
                <property name="username" value="$jdbc.user"/>
                <property name="password" value="$jdbc.password"/>
            </dataSource>
        </environment>
    </environments>

    <!--    加载映射文件-->
    <mappers>
        <!--        <mapper resource="com\\itheima\\mapper\\AccountMapper.xml"></mapper>-->
        <package name="com.itheima.mapper"/>
    </mappers>

</configuration>

•数据库连接信息文件：jdbc.properties

jdbc.driver=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql://localhost:3306/ssm
jdbc.user=root
jdbc.password=123456

•Web.xml文件：web.xml

<?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_4_0.xsd"
         version="4.0">
    <!--    配置Spring监听器-->
    <listener>
        <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
    </listener>
    <!--    全局的初始化参数-->
    <context-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>classpath:applicationContext.xml</param-value>
    </context-param>
    <!--    SpringMVC的前端控制器-->
    <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>
        <load-on-startup>1</load-on-startup>
    </servlet>
    <servlet-mapping>
        <servlet-name>DispatcherServlet</servlet-name>
        <url-pattern>/</url-pattern>
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