SSM整合

2023-11-24 09:34:40

目录
SSM框架整合
 搭建数据库(MySQL)
基本项目的搭建
 Mybatis层
 Spring层
 SpringMVC层
 小结(MySQL数据库主键无法连续自增问题)

SSM框架整合

环境

IDEA
MySQL 5.5
Tomcat 8.5.34
Maven 3.6.0

搭建数据库(MySQL)

CREATE DATABASE `ssmbuild`;

USE `ssmbuild`;

DROP TABLE IF EXISTS `books`;

CREATE TABLE `books` (
`bookID` INT(10) NOT NULL AUTO_INCREMENT COMMENT '书id',
`bookName` VARCHAR(100) NOT NULL COMMENT '书名',
`bookCounts` INT(11) 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,'从入门到进牢');

基本项目的搭建

新建maven项目,添加web支持

导入相关的maven依赖

<dependencies>
   <!--Junit-->
   <dependency>
       <groupId>junit</groupId>
       <artifactId>junit</artifactId>
       <version>4.12</version>
   </dependency>
   <!--数据库驱动-->
   <dependency>
       <groupId>mysql</groupId>
       <artifactId>mysql-connector-java</artifactId>
       <version>5.1.47</version>
   </dependency>
   <!-- 数据库连接池 -->
   <dependency>
       <groupId>com.mchange</groupId>
       <artifactId>c3p0</artifactId>
       <version>0.9.5.2</version>
   </dependency>

   <!--Servlet - 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>2.2</version>
   </dependency>
   <dependency>
       <groupId>javax.servlet</groupId>
       <artifactId>jstl</artifactId>
       <version>1.2</version>
   </dependency>

   <!--Mybatis-->
   <dependency>
       <groupId>org.mybatis</groupId>
       <artifactId>mybatis</artifactId>
       <version>3.5.2</version>
   </dependency>
   <dependency>
       <groupId>org.mybatis</groupId>
       <artifactId>mybatis-spring</artifactId>
       <version>2.0.2</version>
   </dependency>

   <!--Spring-->
   <dependency>
       <groupId>org.springframework</groupId>
       <artifactId>spring-webmvc</artifactId>
       <version>5.1.9.RELEASE</version>
   </dependency>
   <dependency>
       <groupId>org.springframework</groupId>
       <artifactId>spring-jdbc</artifactId>
       <version>5.1.9.RELEASE</version>
   </dependency>
</dependencies>

3.Maven资源过滤问题

<build>
   <resources>
       <resource>
           <directory>src/main/java</directory>
           <includes>
               <include>**/*.properties</include>
               <include>**/*.xml</include>
           </includes>
           <filtering>false</filtering>
       </resource>
       <resource>
           <directory>src/main/resources</directory>
           <includes>
               <include>**/*.properties</include>
               <include>**/*.xml</include>
           </includes>
           <filtering>false</filtering>
       </resource>
   </resources>
</build>

建立基本结构和配置框架

com.inspur.pojo (持久层)
com.inspur.dao (Dao层)
com.inspur.service (业务处理层)
com.inspur.controller (业务控制层)

mybatis-config.xml (可在IDEA中设置xml模版) --> File | Settings | 编辑器 | 文件和代码模板

<?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>
    
    <!-- 别名设置 pojo:实体类上可加注解 @Alias("books")-->
    <!--可在Mapper.xml文件中使用时无需类的全限定名,默认为类名 -->
    <typeAliases>
        <package name=""/>
    </typeAliases>
    <!-- mapper文件路径 -->
    <mappers>
        <mapper resource=""></mapper>
    </mappers>
</configuration>

applicationContext.xml (IDEA含有spring的初始化的配置文件)

<?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 		    http://www.springframework.org/schema/beans/spring-beans.xsd">

</beans>

Mybatis层

数据库配置文件db.properties (设为模版,同上), --> 在Spring配置文件中读取

jdbc.driver=com.mysql.jdbc.Driver
#如果使用MySQL8.0+,需要增加一个时区的配置; &serverTimezone=Asia/Shanghai
jdbc.url=jdbc:mysql://localhost:3306/ssmbuild?useSSL=true&useUnicode=true&characterEncoding=utf8
jdbc.username=root
jdbc.password=123456

IDEA关联数据库(idea自带的数据库链接)

编写(完善配置信息注意标签的顺序)MyBatis的核心配置文件(mybatis-config.xml)

    <!-- 标准的 日志工厂实现  -->
    <settings>
        <setting name="logImpl" value="STDOUT_LOGGING"/>
        <!--  是否开启自动驼峰命名规则 (camel case)映射 -->
        <!--  <setting name="mapUnderscoreToCamelCase" value="true"/>-->
		<!-- 开启全局缓存  -->
        <setting name="cacheEnabled" value="true"/>
    </settings>


<typeAliases>
	<package name="com.inspur.pojo"/>
</typeAliases>
<mappers>
	<mapper resource="com.inspur.dao.BookNapper.xml"/>
</mappers>

编写数据库对应的实体类com.inspur.pojo.Books

使用Lombok插件

import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;
import org.apache.ibatis.type.Alias;
import java.io.Serializable;
/**
 * @author 12093
 * @Created by 12093
 */
@Data
@AllArgsConstructor
@NoArgsConstructor
@Alias("books")   //可在Mapper.xml文件中使用,无需类的全限定名
public class Books implements Serializable {
     //我们需要将实体类序列化(implements Serializable)！否则就会报错！
     private int bookID;
     private String bookName;
     private int bookCounts;
     private String detail;
}

编写Dao层的Mapper接口

import com.inspur.pojo.Books;
import org.apache.ibatis.annotations.Param;
import java.util.List;
/**
 * @author 12093
 */
public interface BookMapper {
    //实现 增/删/改/查
    // 增加一本书
    int addBook(Books books);
    //  删除一本书
    int deleteBookById(@Param("bookID") int id);
    // 更新一本书
    int updateBookById(Books books);
	// 查询一本书
    Books queryBookById(@Param("bookID") int id);
    // 查询全部的书
    List<Books> queryAllBook();
    //根据ID查询一本书
    List queryBookByName(@Param("bookName") String bookName);
    
}

编写接口对应的Mapper.xml文件(最好与其接口同名/同路径)

<?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">
<!--   MyBatis映射文件  -->
<!--namespace=绑定一个对应的Dao/Mapper接口-->
<mapper namespace="com.inspur.dao.BookMapper">
    <cache/>   <!-- 设置此xml文件,使用二级缓存  -->
    
    <!--增加一个Book-->
    <insert id="addBook" parameterType="Books">
        insert into books (bookName,bookCounts,detail)
        values (#{bookName},#{bookCounts},#{detail});
    </insert>

     <!--根据id删除一个Book-->
    <delete id="deleteBookById" parameterType="int">
        delete from books where bookID = #{bookID}
    </delete>

    <!--更新Book-->
    <update id="updateBookById" parameterType="Books">
        update books
        set bookName=#{bookName},bookCounts=#{bookCounts},detail=#{detail}
        where bookID=#{bookID};
    </update>

    <!--根据id查询,返回一个Book-->
    <select id="queryBookById" resultType="Books">
        select * from books 
        where bookID = #{bookID}
    </select>
    
    <!--查询全部Book-->
    <select id="queryAllBook" resultType="Books">
        select * from books;
    </select>
    
    <!--根据bookName查询,返回一个Book-->
    <select id="queryBookByName" resultType="Books">
        select * from books where bookName like "%"#{bookName}"%"
    </select>
    
</mapper>

编写Service层的接口和实现类

接口:

package com.inspur.service;

import com.inspur.pojo.Books;
import java.util.List;
/**
 * @author 12093
 * @Classname BookService
 * @Date 2020/11/8 22:58
 *   BookService:底下需要去实现,调用dao层
 */
public interface BookService {
    // 增加一本Book
    int addBook(Books books);
    
    //根据id删除一本书Book
    int deleteBookById(int id);

    // 更新Book
    int updateBookById(Books books);

    //根据ID查询,返回一个Book
    Books queryBookById(int id);

    //查询全部Book,返回list集合
    List<Books> queryAllBook();
    
    //根据书名模糊查询一本书
 List<Books> queryBookByName(@Param("bookName") String bookName);
}

   
   实现类:
   
   ```java
   mport com.inspur.dao.BookMapper;
   import com.inspur.pojo.Books;
   import java.util.List;
   public class BookServiceImpl implements BookService{
      
       //service调dao层:  组合Dao    可添加业务
       private BookMapper bookMapper;
   
       public void setBookMapper(BookMapper bookMapper) {
           this.bookMapper = bookMapper;
       }
   
       @Override
       public int addBook(Books books) {
           return bookMapper.addBook(books);
       }
   
       @Override
       public int deleteBookById(int id) {
           return bookMapper.deleteBookById(id);
       }
   
       @Override
       public int updateBookById(Books books) {
           return bookMapper.updateBookById(books);
       }
   
       @Override
       public Books queryBookById(int id) {
           return bookMapper.queryBookById(id);
       }
   
       @Override
       public List<Books> queryAllBook() {
           return bookMapper.queryAllBook();
    }
       
     @Override
       public List<Books> queryBookByName(String bookName) {
           return bookMapper.queryBookByName(bookName);
       }
   }

底层需求操作完毕

码农公寓

SSM框架整合

环境

搭建数据库(MySQL)

基本项目的搭建

新建maven项目,添加web支持

导入相关的maven依赖

3.Maven资源过滤问题

建立基本结构和配置框架

Mybatis层

数据库配置文件db.properties (设为模版,同上), --> 在Spring配置文件中读取

IDEA关联数据库(idea自带的数据库链接)

编写(完善配置信息 注意标签的顺序)MyBatis的核心配置文件(mybatis-config.xml)

编写数据库对应的实体类com.inspur.pojo.Books

使用Lombok插件

编写Dao层的Mapper接口

编写接口对应的Mapper.xml文件(最好与其接口 同名/同路径)

Spring层

相关文章

编写(完善配置信息注意标签的顺序)MyBatis的核心配置文件(mybatis-config.xml)

编写接口对应的Mapper.xml文件(最好与其接口同名/同路径)