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整合ssm（一）
2022-08-02 05:04:00 【橘子ꦿ.๓】
项目整体结构
数据库环境
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,'从进门到进牢');环境依赖
pom.xml
<?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.bdqn</groupId>
<artifactId>ssmbuild</artifactId>
<version>1.0-SNAPSHOT</version>
<!--依赖：Junit，数据库驱动，连接池，servlet，jsp，mybatis，mybattis-spring,spring-->
<!--Junit-->
<dependencies>
<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>
<!--添加Servlet和JSP依赖-->
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>javax.servlet-api</artifactId>
<version>3.1.0</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>
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>fastjson</artifactId>
<version>1.2.75</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-jdbc</artifactId>
<version>5.2.7.RELEASE</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>
<dependency>
<groupId>org.aspectj</groupId>
<artifactId>aspectjweaver</artifactId>
<version>1.8.13</version>
</dependency>
<!--Lombok-->
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<version>1.16.10</version>
</dependency>
</dependencies>Maven资源过滤问题
<!--静态资源导出失败问题-->
<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>
</project>建立基本结构
1.com.bdqn.pojo
2.com.bdqn.dao
3.com.bdqn.service
4.com.bdqn.controllermybatis-config.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>
</configuration>Mapper.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="">
</mapper>Spring的配置文件
spring-mvc.xml、spring-service.xml、spring-dao.xml,applicationContext.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"xsi:schemaLocation="http://www.springframework.org/schema/beanshttp://www.springframework.org/schema/beans/springbeans.xsd">
</beans>Mybatis层编写
数据库配置文件：jdbc.properties
在resources目录下jdbc.properties
jdbc.driver=com.mysql.jdbc.Driver
url: jdbc:mysql://localhost:3306/ssmbuild?useSSL=true&characterEncoding=utf-8
jdbc.username=root
jdbc.password=123456MyBatis的核心配置文件 mybatis-config.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>
<settings>
<setting name="logImpl" value="STDOUT_LOGGING"/>
</settings>
<!--配置数据源，交给Spring去做-->
<typeAliases>
<package name="com.bdqn.pojo"/>
</typeAliases>
<mappers>
<mapper class="com.bdqn.dao.BookMapper"></mapper>
</mappers>
</configuration>编写数据库对应的实体类
package com.bdqn.pojo;
import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;
@Data
@AllArgsConstructor
@NoArgsConstructor
public class Books {
private int bookId;
private String bookName;
private int bookCounts;
private String detail;
}
编写Dao层的Mapper接口
package com.bdqn.dao;
import com.bdqn.pojo.Books;
import org.apache.ibatis.annotations.Param;
import java.awt.print.Book;
import java.util.List;
public interface BookMapper {
//增加一本书
int addBooks(Books books);
//删除一本书
int deleteBookById(@Param("bookId") int id);
//更新一本书
int updateBook(Books books);
//查询一本书
Books queryBookById(@Param("bookId") int id);
//查询全部书
List<Books> queryAllBook();
//根据书名查询信息
Books queryBookByName(@Param("bookName")String bookName);
}
编写接口对应的Mapper.xml文件。需要导入MyBatis的包
<?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.bdqn.dao.BookMapper">
//增加一个book
<insert id="addBooks" parameterType="Books">
insert into ssmbuild.books(bookName, bookCounts, detail)
values (#{bookName},#{bookCounts},#{detail})
</insert>
//根据id删除一个book
<delete id="deleteBookById" parameterType="int">
delete from ssmbuild.books where bookId=#{bookId}
</delete>
//更新book
<update id="updateBook" parameterType="Books">
update ssmbuild.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 ssmbuild.books
where bookId=#{bookId}
</select>
//查询全部书籍
<select id="queryAllBook" resultType="Books">
select * from ssmbuild.books;
</select>
//通过书名查找书籍
<select id="queryBookByName" resultType="Books">
select * from ssmbuild.books where bookName=#{bookName};
</select>
</mapper>
编写Service层的接口和实现类
BookService接口
package com.bdqn.service;
import com.bdqn.pojo.Books;
import java.util.List;
public interface BookService {
//增加一本书
int addBooks(Books books);
//删除一本书
int deleteBookById(int id);
//更新一本书
int updateBook(Books books);
//查询一本书
Books queryBookById(int id);
//查询全部书
List<Books> queryAllBook();
//根据书名查询信息
Books queryBookByName(String bookName);
}
BookServiceImpl实现类
package com.bdqn.service;
import com.bdqn.dao.BookMapper;
import com.bdqn.pojo.Books;
import java.util.List;
public class BookServiceImpl implements BookService {
//service调dao层： 组合dao
private BookMapper bookMapper;
public void setBookMapper(BookMapper bookMapper) {
this.bookMapper = bookMapper;
}
public int addBooks(Books books) {
return bookMapper.addBooks(books);
}
public int deleteBookById(int id) {
return bookMapper.deleteBookById(id);
}
public int updateBook(Books books) {
System.out.println("BookServiceImpl:updateBook=>"+books);
return bookMapper.updateBook(books);
}
public Books queryBookById(int id) {
return bookMapper.queryBookById(id);
}
public List<Books> queryAllBook() {
return bookMapper.queryAllBook();
}
public Books queryBookByName(String bookName) {
return bookMapper.queryBookByName(bookName);
}
}
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