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SSM整合

程序员文章站 2022-03-10 19:17:45
搭建整合环境 整合可以有很多种方式，这里用 的方式 1、环境要求 IDEA MySQL 5.7.29 Tomcat 9.0 Maven 3.6.1 2、创建数据库和表 sql CREATE DATABASE ; USE ; CREATE TABLE ( INT(10) NOT NULL AUTO_I ......

1. 数据库准备

CREATE DATABASE ssmbuild;
USE ssmbuild;
CREATE TABLE `books`(
`bookID` INT NOT NULL AUTO_INCREMENT COMMENT '书id',
`bookName` VARCHAR(100) NOT NULL COMMENT '书名',
`bookCounts` INT NOT NULL COMMENT '数量',
`detail` VARCHAR(200) NOT NULL COMMENT '描述',
KEY `bookID`(`bookID`)
)ENGINE=INNODB DEFAULT CHARSET=utf8

INSERT INTO `books`(`bookID`,`bookName`,`bookCounts`,`detail`)VALUES
(1,'Java',1,'从入门到放弃'),
(2,'MySQL',10,'从删库到跑路'),
(3,'Linux',5,'从进门到进牢')

2.新建maven项目SSM整合

3.导入依赖

<?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/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>com.hzu</groupId>
    <artifactId>ssmbuild</artifactId>
    <version>1.0-SNAPSHOT</version>

    <!--SSM整合导入依赖: junit,mysql,数据连接池:c3p0,servlet,jsp,mybatis,mybatis-spring,springwebmvc,spring-jdbc  -->
    <dependencies>
        <!--junit-->
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>4.13</version>
        </dependency>
        <!--mysql-->
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>5.1.47</version>
        </dependency>
        <!--数据库连接池c3p0-->
        <dependency>
            <groupId>com.mchange</groupId>
            <artifactId>c3p0</artifactId>
            <version>0.9.5.2</version>
        </dependency>
        <!--servlet-->
        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>servlet-api</artifactId>
            <version>2.5</version>
        </dependency>
        <!--jsp-->
        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>jsp-api</artifactId>
            <version>2.0</version>
        </dependency>
        <!--mybatis-->
        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis</artifactId>
            <version>3.5.5</version>
        </dependency>
        <!--mybatis-spring-->
        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis-spring</artifactId>
            <version>2.0.5</version>
        </dependency>
        <!--spring-webmvc-->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-webmvc</artifactId>
            <version>5.2.7.RELEASE</version>
        </dependency>
        <!--spring-jdbc-->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-jdbc</artifactId>
            <version>5.2.7.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <version>1.18.6</version>
        </dependency>
        <!--jstl-->
        <dependency>
            <groupId>jstl</groupId>
            <artifactId>jstl</artifactId>
            <version>1.2</version>
        </dependency>
    </dependencies>

    <!--静态资源过滤-->
    <build>
        <!--资源过滤，maven默认只加载resource下的配置文件-->
        <resources>
            <resource>
                <directory>src/main/java</directory>
                <includes>
                    <include>**/*.properties</include>
                    <include>**/*.xml</include>
                </includes>
                <filtering>true</filtering>
            </resource>
            <!--resources也配置一下，以防读取不到-->
            <resource>
                <directory>src/main/resources</directory>
                <includes>
                    <include>**/*.properties</include>
                    <include>**/*.xml</include>
                </includes>
                <filtering>true</filtering>
            </resource>
        </resources>
    </build>

</project>

4.mybatis整合

4.1 mybatis-config.xml(mybatis的核心配置文件)

<?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">
<!--mybatis核心配置文件-->
<configuration>
    <!--数据源配置，整合后交给spring管理-->
    <!--取别名-->
    <typeAliases>
        <!--包扫描-->
        <package name="com.hzu.pojo"/>
    </typeAliases>
    <!--xxxMapper.xml配置文件，可以交给spring管理-->
</configuration>

4.2 pojo

package com.hzu.pojo;

import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;

@Data//gettter、setter，equals、hashCode、toString、无参构造
@AllArgsConstructor//有参构造
@NoArgsConstructor//无参构造
public class Books {
    private int bookID;
    private String bookName;
    private int bookCounts;
    private String detail;
}

4.3 mapper

4.3.1 bookMapper.java

package com.hzu.mapper;

import com.hzu.pojo.Books;
import org.apache.ibatis.annotations.Param;

import java.util.List;

public interface BooksMapper {

    //1.增加一本书
    public int addBook(Books book);
    //2.删除一本书
    public int deleteBookById(@Param("bookId") int id);
    //3.更新一本书
    public int updateBook(Books book);
    //4.查询一本书
    public Books queryBookById(@Param("bookId") int id);
    //5.查询所有书
    public List<Books> queryAllBooks();
}

4.3.2 bookMapper.xml

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE mapper
        PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
        "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="com.hzu.mapper.BooksMapper">

    <insert id="addBook" parameterType="Books">
        insert into ssmbuild.books (bookName, bookCounts, detail)
        values (#{bookName}，#{bookCounts}，#{detail})
    </insert>

    <delete id="deleteBookById" parameterType="_int">
        delete from ssmbuild.books where bookID=#{bookId}
    </delete>

    <update id="updateBook" parameterType="Books">
        update ssmbuild.books
        <set>
          <if test="bookName!=null">
              bookName=#{bookName},
          </if>
          <if test="bookCounts!=null">
              bookCounts=#{bookCounts},
          </if>
          <if test="detail!=null">
              detail=#{detail}
          </if>
        </set>
    </update>

    <select id="queryBookById" parameterType="_int" resultType="Books">
        select * from ssmbuild.books where bookID=#{bookId}
    </select>

    <select id="queryAllBooks" resultType="Books">
        select * from ssmbuild.books
    </select>
</mapper>

5.service层构建

5.1 BookService

package com.hzu.service;

import com.hzu.pojo.Books;
import org.apache.ibatis.annotations.Param;

import java.util.List;

public interface BooksService {
    //1.增加一本书
    public int addBook(Books book);
    //2.删除一本书
    public int deleteBookById(@Param("bookId") int id);
    //3.更新一本书
    public int updateBook(Books book);
    //4.查询一本书
    public Books queryBookById(@Param("bookId") int id);
    //5.查询所有书
    public List<Books> queryAllBooks();
}

5.2 BookServiceImpl

package com.hzu.service;

import com.hzu.mapper.BooksMapper;
import com.hzu.pojo.Books;

import java.util.List;

public class BooksServiceImpl implements BooksService {
    private BooksMapper booksMapper;

    //set方法可以通过Spring将其注入
    public void setBooksMapper(BooksMapper booksMapper) {
        this.booksMapper = booksMapper;
    }

    @Override
    public int addBook(Books book) {
        return booksMapper.addBook(book);
    }

    @Override
    public int deleteBookById(int id) {
        return booksMapper.deleteBookById(id);
    }

    @Override
    public int updateBook(Books book) {
        return booksMapper.updateBook(book);
    }

    @Override
    public Books queryBookById(int id) {
        return booksMapper.queryBookById(id);
    }

    @Override
    public List<Books> queryAllBooks() {
        return booksMapper.queryAllBooks();
    }
}

6. spring整合mybatis

6.1 spring-dao.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"
       xsi:schemaLocation="http://www.springframework.org/schema/beans
        https://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd">
    <!--1. 关联数据库配置文件-->
    <context:property-placeholder location="classpath:db.properties"/>
    <!--
       2.连接池
        dbcp:半自动化，不能自动连接
        c3p0:自动化操作（自动化的加载配置文件，并且可以自动化的设置到对象中！）
        druid:
    -->
    <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
        <property name="driverClass" value="${jdbc.driver}"/>
        <property name="jdbcUrl" value="${jdbc.url}"/>
        <property name="user" value="${jdbc.username}"/>
        <property name="password" value="${jdbc.password}"/>
        <!--c3p0的私有属性-->
        <property name="maxPoolSize" value="30"/>
        <property name="minPoolSize" value="10"/>
        <!--关闭连接后不自动commit-->
        <property name="autoCommitOnClose" value="false"/>
        <!--获取连接超时时间-->
        <property name="checkoutTimeout" value="10000"/>
        <!--获取连接失败后的重连次数-->
        <property name="acquireRetryAttempts" value="2"/>
    </bean>

    <!--3.sqlSessionFactory-->
    <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
        <property name="dataSource" ref="dataSource"/>
        <!--绑定Mybatis配置文件-->
        <property name="configLocation" value="classpath:mybatis-config.xml"/>
    </bean>
    <!--4.配置dao的接口扫描，动态实现了Dao接口注入到Spring容器中-->
    <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        <!--注入sqlSessionFactory-->
        <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"/>
        <!--扫描的dao接口-->
        <property name="basePackage" value="com.hzu.mapper"/>
    </bean>
</beans>

6.2 db.properties

jdbc.driver=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql://localhost:3306/ssmbuild?useUnicode=true&characterEncoding=UTF-8&zeroDateTimeBehavior=convertToNull&allowMultiQueries=true
jdbc.username=root
jdbc.password=123456

6.3 spring-service

<?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"
       xsi:schemaLocation="http://www.springframework.org/schema/beans
        https://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd">

    <!--1. 扫描该报下的所有组件注解-->
    <context:component-scan base-package="com.hzu.service"/>
    <!--2. 将我们所有的业务类，注入到spring中，可以通过注解，也可以通过配置-->
    <bean id="BooksServiceImpl" class="com.hzu.service.BooksServiceImpl">
        <property name="booksMapper" ref="booksMapper"/>
    </bean>
    <!--3.声明式事务-->
    <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
        <!--注入数据源-->
        <property name="dataSource" ref="dataSource"/>
    </bean>
    <!--4.aop事务支持！-->
</beans>

7.springmvc整合

7.1 web.xml配置

<?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">
    <!--DispatcherServlet:前端控制器-->
    <servlet>
        <servlet-name>springmvc</servlet-name>
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
        <init-param>
            <param-name>contextConfigLocation</param-name>
            <param-value>classpath:applicationContext.xml</param-value>
        </init-param>
        <load-on-startup>1</load-on-startup>
    </servlet>
    <servlet-mapping>
        <servlet-name>springmvc</servlet-name>
        <url-pattern>/</url-pattern>
    </servlet-mapping>
    <!--乱码过滤-->
    <!--springmvc的过滤器-->
    <filter>
        <filter-name>encoding</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>encoding</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping>
</web-app>

7.2 spring-mvc.xml配置

<?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
        https://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">

    <!--1.注解驱动的处理器映射器和处理器适配器-->
    <mvc:annotation-driven/>
    <!--2.静态资源过滤-->
    <mvc:default-servlet-handler/>
    <!--3.视图解析器-->
    <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name="prefix" value="/WEB-INF/jsp/"/>
        <property name="suffix" value=".jsp"/>
    </bean>
    <!--4.组件扫描-->
    <context:component-scan base-package="com.hzu.controller"/>
</beans>

7.3 applicationContext.xml配置文件

<?xml version="1.0" encoding="UTF-8"?>
<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
        https://www.springframework.org/schema/beans/spring-beans.xsd">

    <import resource="classpath:spring-dao.xml"/>

    <import resource="classpath:spring-service.xml"/>

    <import resource="classpath:spring-mvc.xml"/>
</beans>

7.4 BookController

package com.hzu.controller;

import com.hzu.pojo.Books;
import com.hzu.service.BooksService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;

import java.util.List;

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

    //controller调用service
    @Autowired
    @Qualifier("BooksServiceImpl")
    private BooksService booksService;

    @RequestMapping("/allBook")
    public String queryAllBooks(Model model){
        List<Books> books = booksService.queryAllBooks();
        model.addAttribute("books",books);
        return "allBook";
    }
}

8 测试

8.1 index.jsp

<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
  <head>
    <title>首页</title>
    <style>
      a{
        text-decoration: none;
        color: black;
        font-size: 20px;
      }
      h3{
        width: 180px;
        height: 50px;
        margin: 100px auto;/*设置外边距 auto居中显示*/
        text-align: center;/*文本居中*/
        line-height: 50px;/*行高跟字体一样就居中*/
        background-color: deepskyblue;
        border-radius: 5px;
      }
    </style>
  </head>
  <body>
  <h3>
    <a href="${pageContext.request.contextPath}/book/allBook">进入书籍页面</a>
  </h3>
  </body>
</html>

8.2 addBook.jsp

<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>查询所有书籍</title>
    <%--bootStrap美化页面--%>
    <link rel="stylesheet" href="//netdna.bootstrapcdn.com/bootstrap/3.1.1/css/bootstrap.min.css"></head>
<body>
<div class="bs-example" data-example-id="panel-without-body-with-table">
    <div class="panel panel-default">
        <div class="panel-heading">书籍展示</div>
        <!-- Table -->
        <table class="table">
            <thead>
            <tr>
                <th>编号</th>
                <th>书名</th>
                <th>数量</th>
                <th>描述</th>
            </tr>
            </thead>
            <tbody>
            <c:forEach var="book" items="${books}">
                <tr>
                    <td>${book.bookID}</td>
                    <td>${book.bookName}</td>
                    <td>${book.bookCounts}</td>
                    <td>${book.detail}</td>
                </tr>
            </c:forEach>
            </tbody>
        </table>
    </div>
</div>
</body>
</html>

8. 3 结果展示

SSM整合

8.4 目录结构

SSM整合

本文地址：https://blog.csdn.net/weixin_42291877/article/details/110918194

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