标签：smb not jin his ring books tde 放弃 lazy
学完了ssm框架之后针对图书管理的几个小功能进行针对于ssm框架的整合
首先数据库是最为关键的，同时也是一个项目的基础
use `ssmbuild`; create table `books`( `bookID` int(10) not null auto_increment comment ‘书id‘, `bookName` varchar(100) not null comment ‘书名‘, `bookCounts` int(10) not null comment ‘书数量‘, `detail` varchar(200) not null comment‘描述‘, primary key(`bookID`) )engine=innodb 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‘);
我们创建一个数据库，然后创建一张books的表，之后给他插入几行数据
现在开始整合Mybatis
创建一个maven工程：并且导入依赖，还有为防止maven出现资源泄露的问题也加上相关的组件
<!--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> <!--资源导出问题--> <build> <resources> <resource> <directory>src/main/resources</directory> <includes> <include>**/*.properties</include> <include>**/*.xml</include> </includes> <filtering>false</filtering> </resource> <resource> <directory>src/main/java</directory> <includes> <include>**/*.properties</include> <include>**/*.xml</include> </includes> <filtering>false</filtering> </resource> </resources> </build>
之后开始搭建项目的结构
我们先开始创建dao层的接口：BookMapper,并添加几个简单地增删改查的小功能
public interface BookMapper { //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 updateBook(Books books); //查询一本书 Books queryBookById(@Param("bookId") int id); //查询全部的书 List<Books> queryAllBook(); }
之后马上开始对功能进行sql语句的编写（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.jin.dao.BookMapper"> <insert id="addBook" parameterType="Books"> insert into ssmbuild.books(bookID, bookName, bookCounts, detail) values (#{bookID},#{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 bookName=#{bookName},bookCounts=#{bookCounts},detail=#{detail} where bookID=#{bookId}; </update> <select id="queryBookById" parameterType="int" resultType="Books"> select * from ssmbuild.books where bookID=#{bookId} </select> <select id="queryAllBook" resultType="Books"> select * from ssmbuild.books </select> </mapper>
写完以后我们把这个接口注册到mybatis的核心配置文件里面去
<?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> <!--配置数据源spring去做--> <typeAliases> <package name="com.jin.pojo"/> </typeAliases> <mappers> <mapper class="com.jin.dao.BookMapper"/> </mappers> </configuration>
补充一下，实体类忘创建了.......
public class Books { private int bookID; private String bookName; private int bookCounts; private String detail; public Books() { } public Books(int bookID, String bookName, int bookCounts, String detail) { this.bookID = bookID; this.bookName = bookName; this.bookCounts = bookCounts; this.detail = detail; } public int getBookID() { return bookID; } public void setBookID(int bookID) { this.bookID = bookID; } public String getBookName() { return bookName; } public void setBookName(String bookName) { this.bookName = bookName; } public int getBookCounts() { return bookCounts; } public void setBookCounts(int bookCounts) { this.bookCounts = bookCounts; } public String getDetail() { return detail; } public void setDetail(String detail) { this.detail = detail; } @Override public String toString() { return "books{" + "bookID=" + bookID + ", bookName=‘" + bookName + ‘\‘‘ + ", bookCounts=" + bookCounts + ", detail=‘" + detail + ‘\‘‘ + ‘}‘; } }
之后开始编写service层（业务层）这个借口里的代码跟dao层里面的代码几乎是一样的因为service层只需要调用dao层就好
public interface BookService { //增加一本书 int addBook(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); //查询全部的书 List<Books> queryAllBook();
之后是bookService的实现类，要引入dao层只需要引入dao层接口的引用就好
public class BookServiceImpl implements BookService { //service调用dao层 private BookMapper bookMapper; public void setBookMapper(BookMapper bookMapper) { this.bookMapper = bookMapper; } public int addBook(Books books) { return bookMapper.addBook(books); } public int deleteBookById(int id) { return bookMapper.deleteBookById(id); } public int updateBook(Books books) { return bookMapper.updateBook(books); } public Books queryBookById(int id) { return bookMapper.queryBookById(id); } public List<Books> queryAllBook() { return bookMapper.queryAllBook(); } }
这样Mybatis的整合就好了，等待着spring的接管还有springMVC的视图转发就好
标签：smb not jin his ring books tde 放弃 lazy
原文地址：https://www.cnblogs.com/joyboy007/p/13837011.html
