环境要求
环境:
- IDEA
- MySQL 5.7.19
- Tomcat 9
- Maven 3.6
要求:
- 需要熟练掌握MySQL数据库,Spring,JavaWeb及MyBatis知识,简单的前端知识;
项目结构图
java目录
- pojo
- dao
- service
- controller
resources目录
- database.properties
- mybatis-config.xml
- spring-dao.xml
- spring-service.xml
- spring-mvc.xml
- applicationContext.xml
web目录
- index.jsp
- WEB-INF
- jsp目录
- web.xml
数据库环境
创建一个存放书籍数据的数据库表
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');
基本环境搭建
1、新建一Maven项目!ssmbuild , 添加web的支持
2、导入相关的pom依赖!
junit
junit
4.12
mysql
mysql-connector-java
5.1.47
com.mchange
c3p0
0.9.5.2
javax.servlet
servlet-api
2.5
javax.servlet.jsp
jsp-api
2.2
javax.servlet
jstl
1.2
org.mybatis
mybatis
3.5.2
org.mybatis
mybatis-spring
2.0.2
org.springframework
spring-webmvc
5.1.9.RELEASE
org.springframework
spring-jdbc
5.1.9.RELEASE
org.projectlombok
lombok
1.16.10
org.aspectj
aspectjweaver
1.8.13
3、Maven资源过滤设置
src/main/java
**/*.properties
**/*.xml
false
src/main/resources
**/*.properties
**/*.xml
false
4、建立基本结构和配置框架!
java目录 下建立四个包
com.qiu.pojo
com.qiu.dao
com.qiu.service
com.qiu.controller
mybatis-config.xml
applicationContext.xml
Mybatis层编写
1、数据库配置文件 database.properties
jdbc.driver=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql://localhost:3306/ssmbuild?useSSL=true&useUnicode=true&characterEncoding=utf8
jdbc.username=root
jdbc.password=123456
2、IDEA关联数据库
3、编写MyBatis的核心配置文件
4、编写数据库对应的实体类 com.qiu.pojo.Books
使用 lombok 插件!
package com.qiu.pojo;
import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;
@NoArgsConstructor
@AllArgsConstructor
@Data
public class Books {
private int bookID;
private String bookName;
private int bookCounts;
private String detail;
}
5、编写Dao层的 Mapper 接口!
package com.qiu.dao;
import com.qiu.pojo.Books;
import org.apache.ibatis.annotations.Param;
import java.util.List;
public interface BookMapper {
//增加一本图书
int addBook(Books books);
//删除一本图书
int deleteBook(@Param("bookId") int id);
//更新一本图书
int updateBook(Books books);
//查询一本图书
Books queryBookById(@Param("bookId") int id);
//查询全部的图书
List queryAllBook();
//根据书名查询图书
List queryBookByName(@Param("bookName") String bookName);
}
6、编写接口对应的 BookMapper.xml 文件。需要导入 MyBatis 的包;
insert into ssmbuild.books (bookName, bookCounts, detail)
values (#{bookName}, #{bookCounts}, #{detail});
delete from ssmbuild.books where bookID = #{bookId};
update ssmbuild.books
set bookName = #{bookName},bookCounts = #{bookCounts},detail = #{detail}
where bookID = #{bookID};
7、编写 Service 层的接口和实现类
接口:
package com.qiu.service;
import com.qiu.pojo.Books;
import java.util.List;
public interface BookService {
//增加一本图书
int addBook(Books books);
//删除一本图书
int deleteBook(int id);
//更新一本图书
int updateBook(Books books);
//查询一本图书
Books queryBookById(int id);
//查询全部的图书
List queryAllBook();
//根据书名查询图书
List queryBookByName(String bookName);
}
实现类:
package com.qiu.service;
import com.qiu.dao.BookMapper;
import com.qiu.pojo.Books;
import java.util.List;
public class BookServiceImpl implements BookService {
//调用dao层的操作,设置一个set接口,方便Spring管理
private BookMapper bookMapper;
public void setBookMapper(BookMapper bookMapper) {
this.bookMapper = bookMapper;
}
public int addBook(Books books) {
return bookMapper.addBook(books);
}
public int deleteBook(int id) {
return bookMapper.deleteBook(id);
}
public int updateBook(Books books) {
return bookMapper.updateBook(books);
}
public Books queryBookById(int id) {
return bookMapper.queryBookById(id);
}
public List queryAllBook() {
return bookMapper.queryAllBook();
}
public List queryBookByName(String bookName) {
return bookMapper.queryBookByName(bookName);
}
}
底层需求操作编写完毕!
Spring层编写
1、配置Spring整合MyBatis,我们这里数据源使用c3p0连接池;
2、我们去编写Spring整合Mybatis的相关的配置文件;【spring-dao.xml】
3、Spring整合service层(配置文件:spring-service.xml )
Spring层搞定!
SpringMVC层编写
1、web.xml
SpringMVC
org.springframework.web.servlet.DispatcherServlet
contextConfigLocation
classpath:applicationContext.xml
1
SpringMVC
/
encodingFilter
org.springframework.web.filter.CharacterEncodingFilter
encoding
utf-8
encodingFilter
/*
15
2、spring-mvc.xml
3、Spring配置整合文件,applicationContext.xml
配置文件,暂时结束!
Controller 和 视图层
1、BookController 类编写 ,方法一:查询全部书籍
import com.qiu.pojo.Books;
import com.qiu.service.BookService;
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 层
@Autowired
@Qualifier("bookServiceImpl")
private BookService bookService;
//查询全部的书籍,并且返回到一个书籍展示页面
@RequestMapping("/allBook")
public String list(Model model){
List books = bookService.queryAllBook();
model.addAttribute("list",books);
return "allBook";
}
}
2、编写首页 index.jsp
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
主页
进入书籍展示页面
3、书籍列表页面 allBook.jsp
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
书籍展示
<%--BootStrap 美化界面--%>
4、BookController 类编写 , 方法二:添加书籍
//跳转到增加书籍页面
@RequestMapping("/toAddBook")
public String toAddPaper(){
return "addBook";
}
//添加书籍的请求
@RequestMapping("/addBook")
public String addBook(Books books){
System.out.println("addBook=>" + books);
bookService.addBook(books);
return "redirect:/book/allBook"; //重定向到我们的allBook
}
5、添加书籍页面:addBook.jsp
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
新增图书
<%--BootStrap 美化界面--%>
新增书籍
6、BookController 类编写 , 方法三:修改书籍
//跳转到修改书籍页面
@RequestMapping("/toUpdateBook/{bookId}")
public String toUpdatePaper(@PathVariable ("bookId") int id,Model model){
Books book = bookService.queryBookById(id);
model.addAttribute("QBook",book);
return "updateBook";
}
//修改书籍的请求
@RequestMapping("/updateBook")
public String updateBook(Books books){
System.out.println("updateBook=>" + books);
bookService.updateBook(books);
return "redirect:/book/allBook";
}
7、修改书籍页面 updateBook.jsp
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
修改图书
<%--BootStrap 美化界面--%>
修改书籍
8、BookController 类编写 , 方法四:删除书籍
//删除书籍
@RequestMapping("/deleteBook/{bookId}")
public String deleteBook(@PathVariable ("bookId") int id){
bookService.deleteBook(id);
return "redirect:/book/allBook";
}
9、BookController 类编写 , 方法五:根据书名模糊查询书籍
//查询书籍
@RequestMapping("/queryBook")
public String queryBook(String queryBookName,Model model){
List books = bookService.queryBookByName(queryBookName);
if(books.size()==0){
books=bookService.queryAllBook();
model.addAttribute("error","未查到");
}
model.addAttribute("list",books);
return "allBook";
}
配置Tomcat,进行运行!
到目前为止,这个SSM项目整合已经完全的OK了,可以直接运行进行测试!
本篇总结参考 B站狂神说Java:https://space.bilibili.com/95256449