SSM整合

SSM整合

1. 准备工作

1.依赖问题

<dependencies>
    
    <dependency>
        <groupId>junitgroupId>
        <artifactId>junitartifactId>
        <version>4.11version>
        <scope>testscope>
    dependency>

    
    <dependency>
        <groupId>mysqlgroupId>
        <artifactId>mysql-connector-javaartifactId>
        <version>5.1.25version>
    dependency>

    
    <dependency>
        <groupId>com.alibabagroupId>
        <artifactId>druidartifactId>
        <version>1.2.8version>
    dependency>

    
    <dependency>
        <groupId>javax.servletgroupId>
        <artifactId>javax.servlet-apiartifactId>
        <version>3.1.0version>
        <scope>providedscope>
    dependency>

    
    <dependency>
        <groupId>javax.servlet.jspgroupId>
        <artifactId>jsp-apiartifactId>
        <version>2.1version>
        <scope>providedscope>
    dependency>

    
    <dependency>
        <groupId>javax.servletgroupId>
        <artifactId>jstlartifactId>
        <version>1.2version>
    dependency>

    
    <dependency>
        <groupId>org.mybatisgroupId>
        <artifactId>mybatisartifactId>
        <version>3.5.9version>
    dependency>
    
    <dependency>
        <groupId>org.mybatisgroupId>
        <artifactId>mybatis-springartifactId>
        <version>2.0.6version>
    dependency>

    
    <dependency>
        <groupId>org.springframeworkgroupId>
        <artifactId>spring-webmvcartifactId>
        <version>5.3.15version>
    dependency>
    
    <dependency>
        <groupId>org.springframeworkgroupId>
        <artifactId>spring-jdbcartifactId>
        <version>5.3.15version>
    dependency>
    
    <dependency>
        <groupId>org.aspectjgroupId>
        <artifactId>aspectjweaverartifactId>
        <version>1.9.6version>
    dependency>


    
    <dependency>
        <groupId>org.projectlombokgroupId>
        <artifactId>lombokartifactId>
        <version>1.18.22version>
        <scope>providedscope>
    dependency>

    
    <dependency>
        <groupId>org.thymeleafgroupId>
        <artifactId>thymeleaf-spring5artifactId>
        <version>3.0.14.RELEASEversion>
    dependency>
dependencies>

2.静态资源导出问题（对于src/main/java目录下的非.java文件也拷贝到classes目录下）

<build>
    <resources>
        <resource>
            <directory>src/main/javadirectory> 
            <includes>
                <include>**/*.propertiesinclude> 
                <include>**/*.xmlinclude>
            includes>
            <filtering>falsefiltering>  
        resource>
    resources>
build>

3.包结构创建出来

main

----java (com.sutong.xxx)

----resource (xx.xml, xx.properties)

----webapp (WEB-INF, web.xml)

test

----java

----resource

2 MyBatis工作

0.sql-表结构

CREATE TABLE `t_books` (
  `id` int(11) NOT NULL AUTO_INCREMENT,
  `name` varchar(255) NOT NULL,
  `count` int(11) DEFAULT NULL,
  `detail` varchar(255) DEFAULT NULL,
  PRIMARY KEY (`id`)
) ENGINE=InnoDB AUTO_INCREMENT=8 DEFAULT CHARSET=utf8;

1.MyBatis配置文件 mybatis-config.xml

DOCTYPE configuration
        PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
        "http://mybatis.org/dtd/mybatis-3-config.dtd">
<configuration>
    
    <settings>
        <setting name="mapUnderscoreToCamelCase" value="true"/>
        <setting name="lazyLoadingEnabled" value="true"/>
        <setting name="aggressiveLazyLoading" value="false"/>
        <setting name="cacheEnabled" value="true"/>
    settings>

    <typeAliases>
        <package name="com.sutong.pojo"/>
    typeAliases>
configuration>

2.pojo准备好（偷懒可以导入lombok包，IDEA需要安装插件支持）

@Data            // @ToString @EqualsAndHashCode @Getter @Setter @RequiredArgsConstructor 集合
@AllArgsConstructor // 生成全参构造器
@NoArgsConstructor  // 生成无参构造器
public class Books {
    private Integer id;
    private String name;
    private Integer count;
    private String detail;
}

3.解决BookMapper.java接口和BookMapper.xml（增删查改！！）文件都放在dao包下

public interface BookMapper {
    void addBook(Books book);
    void deleteBook(Integer id);
    void updateBook(Books book);
    Books getBookById(Integer id);
    List<Books> getAllBook();
}

DOCTYPE mapper
        PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
        "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="com.sutong.dao.BookMapper">
    <insert id="addBook">
        insert into t_books(`name`, `count`, `detail`) values(#{name}, #{count}, #{detail})
    insert>

    <delete id="deleteBook">
        delete from t_books where id = #{id}
    delete>

    <update id="updateBook">
        update t_books set `name` = #{name}, `count` = #{count}, `detail` = #{detail} where `id` = #{id}
    update>

    <select id="getBookById" resultType="books">
        select `id`, `name`, `count`, `detail` from t_books where `id` = #{id};
    select>

    <select id="getAllBook" resultType="books">
        select `id`, `name`, `count`, `detail` from t_books;
    select>
mapper>

4.编写BookService.java和BookServiceImpl.java类，Service调用Dao层

service增删改可能有事务问题！！！

@Transactional  // 所有方法开启事务了(不开启是操作一条数据提交一条)
public class BookServiceImpl implements BookService {

    private BookMapper bookMapper; // 这里下面的配置文件注入，也可以用注解

    @Override
    public void addBook(Books book) { bookMapper.addBook(book); }
    @Override
    public void deleteBook(Integer id) { bookMapper.deleteBook(id); }
    @Override
    public void updateBook(Books book) { bookMapper.updateBook(book); }
    @Override
    public Books getBookById(Integer id) { return bookMapper.getBookById(id); }
    @Override
    public List<Books> getAllBook() { return bookMapper.getAllBook(); }

    // 配置文件中注入bookMapper用的
    public void setBookMapper(BookMapper bookMapper) { this.bookMapper = bookMapper; }
}

3 Spring工作

database.properties

# 如果使用MySQL8+版本需要加上一个时区的配置，而且driver也不一样
jdbc.driver=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql://localhost:3306/mybatis?allowMultiQueries=true
jdbc.username=root
jdbc.password=9527

spring-dao.xml：

<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"
       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">

    
    <context:property-placeholder location="classpath:database.properties"/>

    
    <bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource"
          destroy-method="close">
        <property name="url" value="${jdbc.url}" />
        <property name="username" value="${jdbc.username}" />
        <property name="password" value="${jdbc.password}" />
        <property name="driverClassName" value="${jdbc.driver}" />
    bean>

    
    <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
        <property name="dataSource" ref="dataSource"/>
        <property name="configLocation" value="classpath:mybatis-config.xml"/>
        
        
        
    bean>


    
    <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        
        <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"/>
        
        <property name="basePackage" value="com.sutong.dao"/>
    bean>
    
    
    
beans>

spring-service.xml：

<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
                           https://www.springframework.org/schema/aop/spring-aop.xsd">

    
    <context:component-scan base-package="com.sutong.service"/>

    
    <bean id="bookServiceImpl" class="com.sutong.service.impl.BookServiceImpl">
        
        <property name="bookMapper" ref="bookMapper"/>
    bean>

    
    <bean id="transactionManager"
          class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
        <property name="dataSource" ref="dataSource"/>
    bean>

    
    <tx:annotation-driven transaction-manager="transactionManager"/>
    
    <aop:aspectj-autoproxy>aop:aspectj-autoproxy>
beans>

spring-mvc.xml：

<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">


    
    <context:component-scan base-package="com.sutong.controller"/>

    
    <bean id="viewResolver" class="org.thymeleaf.spring5.view.ThymeleafViewResolver">
        <property name="order" value="1"/> 
        <property name="characterEncoding" value="UTF-8"/>
        <property name="templateEngine">
            <bean class="org.thymeleaf.spring5.SpringTemplateEngine"> 
                <property name="templateResolver">
                    <bean class="org.thymeleaf.spring5.templateresolver.SpringResourceTemplateResolver">
                        
                        <property name="prefix" value="/WEB-INF/templates/"/>  
                        
                        <property name="suffix" value=".html"/>  
                        <property name="templateMode" value="HTML5"/>
                        <property name="characterEncoding" value="UTF-8" />
                    bean>
                property>
            bean>
        property>
    bean>

    
    <mvc:view-controller path="/" view-name="index"/>

    
    <mvc:annotation-driven>
        <mvc:message-converters>
            
            <bean class="org.springframework.http.converter.StringHttpMessageConverter">
                <property name="defaultCharset" value="UTF-8" />
                <property name="supportedMediaTypes">
                    <list>
                        <value>text/htmlvalue>
                        <value>text/plainvalue>
                        <value>application/jsonvalue>
                    list>
                property>
            bean>
        mvc:message-converters>
    mvc:annotation-driven>

    
    <mvc:default-servlet-handler/>
beans>

web.xml

<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">

    
    <filter>
        <filter-name>CharacterEncodingFilterfilter-name>
        <filter-class>org.springframework.web.filter.CharacterEncodingFilterfilter-class>
        <init-param>
            <param-name>encodingparam-name>
            <param-value>UTF-8param-value>
        init-param>
        <init-param>
            <param-name>forceResponseEncodingparam-name>
            <param-value>trueparam-value>
        init-param>
    filter>
    <filter-mapping>
        <filter-name>CharacterEncodingFilterfilter-name>
        <url-pattern>/*url-pattern>
    filter-mapping>

    
    <filter>
        <filter-name>HiddenHttpMethodFilterfilter-name>
        <filter-class>org.springframework.web.filter.HiddenHttpMethodFilterfilter-class>
    filter>
    <filter-mapping>
        <filter-name>HiddenHttpMethodFilterfilter-name>
        <url-pattern>/*url-pattern>
    filter-mapping>

    
    <servlet>
        <servlet-name>dispatcherServletservlet-name>
        <servlet-class>org.springframework.web.servlet.DispatcherServletservlet-class>
        <init-param>
            <param-name>contextConfigLocationparam-name>
            <param-value>classpath:applicationContext.xmlparam-value> 
            
        init-param>
        <load-on-startup>1load-on-startup>
    servlet>
    <servlet-mapping>
        <servlet-name>dispatcherServletservlet-name>
        <url-pattern>/url-pattern>
    servlet-mapping>

web-app>

4 application.xml

application.xml总配置，去包含其他三个Spring配置文件！！

<beans xmlns="http://www.springframework.org/schema/beans"
       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">

    <import resource="spring-dao.xml"/>
    <import resource="spring-service.xml"/>
    <import resource="spring-mvc.xml"/>
beans>

5 Controller层

@Controller
@RequestMapping("/book")
public class BookController {

    @Autowired  // 这里只有byType也行
    @Qualifier("bookServiceImpl")
    private BookService bookService;

    // 查询全部图书返回给页面显示
    @RequestMapping("/list")
    public String list(Model model) {
        List<Books> books = bookService.getAllBook();
        model.addAttribute("books", books);
        return "allBook";
    }
    
    @RequestMapping("/delete")
    public String delete(Integer id) {
        bookService.deleteBook(id);
        return "redirect:/book/list";
    }
}

WEB-INF/templates/index.html

<body>
    <h3>
        <a th:href="@{/book/list}">进入书籍页面a>
    h3>
body>

WEB-INF/templates/allBook.html

<body>
    <table>
        <tr>
            <th>书名th>
            <th>数量th>
            <th>描述th>
        tr>
        <tr th:each="book : ${books}">
            <td th:text="${book.name}">td>
            <td th:text="${book.count}">td>
            <td th:text="${book.detail}">td>
        tr>
    table>
body>

测试：http://localhost:8080/ 进入首页，点击超链接就可以进入allbook.html显示所有图书了