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Integrate SSM to realize search of addition, deletion, modification and query

2022-07-28 03:33:00 【Mighty CRUD】

Integrate SSM Add, delete, modify, search

Realization effect

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Project structure chart

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Environmental Science

Environmental Science ：

IDEA
MySQL 5.7.19
Tomcat 9
Maven 3.6

requirement ：

Need to master MySQL database ,Spring,JavaWeb And MyBatis knowledge , Simple front-end knowledge ;

Database environment

Create a database table to store book data

CREATE DATABASE `ssmbuild`;

USE `ssmbuild`;

DROP TABLE IF EXISTS `books`;

CREATE TABLE `books` (
`bookID` INT(10) NOT NULL AUTO_INCREMENT COMMENT ' book id',
`bookName` VARCHAR(100) NOT NULL COMMENT ' Title ',
`bookCounts` INT(11) NOT NULL COMMENT ' Number ',
`detail` VARCHAR(200) NOT NULL COMMENT ' describe ',
KEY `bookID` (`bookID`)
) ENGINE=INNODB DEFAULT CHARSET=utf8

INSERT  INTO `books`(`bookID`,`bookName`,`bookCounts`,`detail`)VALUES
(1,'Java',1,' From entry to abandonment '),
(2,'MySQL',10,' From delete to run away '),
(3,'Linux',5,' From the door to the prison ');

Basic environment construction

1、 New one Maven project ！ssmbuild , add to web Support for

2、 Import related pom rely on ！

<dependencies>
   <!--Junit-->
   <dependency>
       <groupId>junit</groupId>
       <artifactId>junit</artifactId>
       <version>4.12</version>
   </dependency>
   <!-- Database driven -->
   <dependency>
       <groupId>mysql</groupId>
       <artifactId>mysql-connector-java</artifactId>
       <version>5.1.47</version>
   </dependency>
   <!--  Database connection pool  -->
   <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 Resource filtering settings

<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>

4、 Establish the basic structure and configuration framework ！

pojo
dao
service
controller
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>

</configuration>

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

</beans>

Mybatis Layer

1、 Database configuration file 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=111111

2、IDEA Associated database

3、 To write MyBatis Core profile for

<?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>
   
   <typeAliases>
       <package name="com.syj.pojo"/>
   </typeAliases>
   <mappers>
       <mapper resource="com/syj/dao/BookMapper.xml"/>
   </mappers>

</configuration>

4、 Write the entity class corresponding to the database

package com.syj.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;
   
}

5、 To write Dao Layer of Mapper Interface ！

package com.syj.dao;

import com.kuang.pojo.Books;
import java.util.List;

public interface BookMapper {
    

   // Add one more Book
   int addBook(Books book);

   // according to id Delete one Book
   int deleteBookById(int id);

   // to update Book
   int updateBook(Books books);

   // according to id Inquire about , Return to one Book
   Books queryBookById(int id);

   // Query all Book, return list aggregate 
   List<Books> queryAllBook();

}

6、 Write the interface corresponding to Mapper.xml file . Import required MyBatis My bag ;

<?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.syj.dao.BookMapper">

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

   <!-- according to id Delete one Book-->
   <delete id="deleteBookById" parameterType="int">
      delete from ssmbuild.books where bookID=#{bookID}
   </delete>

   <!-- to update Book-->
   <update id="updateBook" parameterType="Books">
      update ssmbuild.books
      set bookName = #{bookName},bookCounts = #{bookCounts},detail = #{detail}
      where bookID = #{bookID}
   </update>

   <!-- according to id Inquire about , Return to one Book-->
   <select id="queryBookById" resultType="Books">
      select * from ssmbuild.books
      where bookID = #{bookID}
   </select>

   <!-- Query all Book-->
   <select id="queryAllBook" resultType="Books">
      SELECT * from ssmbuild.books
   </select>

</mapper>

7、 To write Service Layer interface and implementation class

Interface ：

package com.syj.service;

import com.kuang.pojo.Books;

import java.util.List;

//BookService: The following needs to be realized , call dao layer 
public interface BookService {
    
   // Add one more Book
   int addBook(Books book);
   // according to id Delete one Book
   int deleteBookById(int id);
   // to update Book
   int updateBook(Books books);
   // according to id Inquire about , Return to one Book
   Books queryBookById(int id);
   // Query all Book, return list aggregate 
   List<Books> queryAllBook();
}

Implementation class ：

package com.syj.service;

import com.kuang.dao.BookMapper;
import com.kuang.pojo.Books;
import java.util.List;

public class BookServiceImpl implements BookService {
    

   // call dao The operation of the layer , Set up a set Interface , convenient Spring management 
   private BookMapper bookMapper;

   public void setBookMapper(BookMapper bookMapper) {
    
       this.bookMapper = bookMapper;
  }
   
   public int addBook(Books book) {
    
       return bookMapper.addBook(book);
  }
   
   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();
  }
}

Spring layer

1、 To configure Spring Integrate MyBatis, We use the data source here c3p0 Connection pool ;

2、 Let's write Spring Integrate Mybatis Related configuration files of ;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 http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd">

   <!--  Configuration integration mybatis -->
   <!-- 1. Associate database file  -->
   <context:property-placeholder location="classpath:database.properties"/>

   <!-- 2. Database connection pool  -->
   <!-- Database connection pool 
       dbcp  Semi automatic operation   Can't automatically connect 
       c3p0  Automation （ Automatically load the configuration file   And set it in the object ）
   -->
   <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
       <!--  Configure connection pool properties  -->
       <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 Private properties of connection pool  -->
       <property name="maxPoolSize" value="30"/>
       <property name="minPoolSize" value="10"/>
       <!--  Do not automatically close the connection commit -->
       <property name="autoCommitOnClose" value="false"/>
       <!--  Get connection timeout  -->
       <property name="checkoutTimeout" value="10000"/>
       <!--  Number of retries when get connection failed  -->
       <property name="acquireRetryAttempts" value="2"/>
   </bean>

   <!-- 3. To configure SqlSessionFactory object  -->
   <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
       <!--  Inject the database connection pool  -->
       <property name="dataSource" ref="dataSource"/>
       <!--  To configure MyBaties Global profile :mybatis-config.xml -->
       <property name="configLocation" value="classpath:mybatis-config.xml"/>
   </bean>

   <!-- 4. Configure scan Dao Interface package , Dynamic implementation Dao Interface injection to spring In the container  -->
   <!-- explain  ：https://www.cnblogs.com/jpfss/p/7799806.html-->
   <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
       <!--  Inject sqlSessionFactory -->
       <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"/>
       <!--  Give need to scan Dao Interface package  -->
       <property name="basePackage" value="com.kuang.dao"/>
   </bean>

</beans>

3、Spring Integrate service layer

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

   <!--  scanning service dependent bean -->
   <context:component-scan base-package="com.syj.service" />

   <!--BookServiceImpl Injection into IOC In the container -->
   <bean id="BookServiceImpl" class="com.kuang.service.BookServiceImpl">
       <property name="bookMapper" ref="bookMapper"/>
   </bean>

   <!--  Configure transaction manager  -->
   <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
       <!--  Inject the database connection pool  -->
       <property name="dataSource" ref="dataSource" />
   </bean>

</beans>

Spring Layer is done ！ Understand again ,Spring It's a hodgepodge , A container ！ Right ！

SpringMVC layer

1、web.xml

<?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-->
   <servlet>
       <servlet-name>DispatcherServlet</servlet-name>
       <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
       <init-param>
           <param-name>contextConfigLocation</param-name>
           <!-- Be sure to pay attention to : What we're loading here is the general configuration file , Before I was trapped here ！-->  
           <param-value>classpath:applicationContext.xml</param-value>
       </init-param>
       <load-on-startup>1</load-on-startup>
   </servlet>
   <servlet-mapping>
       <servlet-name>DispatcherServlet</servlet-name>
       <url-pattern>/</url-pattern>
   </servlet-mapping>

   <!--encodingFilter-->
   <filter>
       <filter-name>encodingFilter</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>encodingFilter</filter-name>
       <url-pattern>/*</url-pattern>
   </filter-mapping>
   
   <!--Session Expiration time -->
   <session-config>
       <session-timeout>15</session-timeout>
   </session-config>
   
</web-app>

2、spring-mvc.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"
      xmlns:mvc="http://www.springframework.org/schema/mvc"
      xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/mvc https://www.springframework.org/schema/mvc/spring-mvc.xsd">

   <!--  To configure SpringMVC -->
   <!-- 1. Turn on SpringMVC Annotation driven  -->
   <mvc:annotation-driven />
   <!-- 2. Static resource default servlet To configure -->
   <mvc:default-servlet-handler/>

   <!-- 3. To configure jsp  Show ViewResolver view resolver  -->
   <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
       <property name="viewClass" value="org.springframework.web.servlet.view.JstlView" />
       <property name="prefix" value="/WEB-INF/jsp/" />
       <property name="suffix" value=".jsp" />
   </bean>

   <!-- 4. scanning web dependent bean -->
   <context:component-scan base-package="com.kuang.controller" />

</beans>

3、Spring Configuration integration file ,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/beans http://www.springframework.org/schema/beans/spring-beans.xsd">

   <import resource="spring-dao.xml"/>
   <import resource="spring-service.xml"/>
   <import resource="spring-mvc.xml"/>
   
</beans>

The configuration file , For the time being ！Controller and View layer writing

1、BookController Class writing , Method 1 ： Search all books

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

   @Autowired
   @Qualifier("BookServiceImpl")
   private BookService bookService;

   @RequestMapping("/allBook")
   public String list(Model model) {
    
       List<Books> list = bookService.queryAllBook();
       model.addAttribute("list", list);
       return "allBook";
  }
}

2、 Write the home page index.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8" %>
<!DOCTYPE HTML>
<html>
<head>
   <title> home page </title>
   <style type="text/css">
       a {
    
           text-decoration: none;
           color: black;
           font-size: 18px;
      }
       h3 {
    
           width: 180px;
           height: 38px;
           margin: 100px auto;
           text-align: center;
           line-height: 38px;
           background: deepskyblue;
           border-radius: 4px;
      }
   </style>
</head>
<body>

<h3>
   <a href="${pageContext.request.contextPath}/book/allBook"> Click to enter the list page </a>
</h3>
</body>
</html>

3、 Book list page allbook.jsp

<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
   <title> List of books </title>
   <meta name="viewport" content="width=device-width, initial-scale=1.0">
   <!--  introduce  Bootstrap -->
   <link href="https://cdn.bootcss.com/bootstrap/3.3.7/css/bootstrap.min.css" rel="stylesheet">
</head>
<body>

<div class="container">

   <div class="row clearfix">
       <div class="col-md-12 column">
           <div class="page-header">
               <h1>
                   <small> List of books  ——  Show all books </small>
               </h1>
           </div>
       </div>
   </div>

   <div class="row">
       <div class="col-md-4 column">
           <a class="btn btn-primary" href="${pageContext.request.contextPath}/book/toAddBook"> newly added </a>
       </div>
   </div>

   <div class="row clearfix">
       <div class="col-md-12 column">
           <table class="table table-hover table-striped">
               <thead>
               <tr>
                   <th> Book number </th>
                   <th> The name of the book </th>
                   <th> Number of books </th>
                   <th> Book details </th>
                   <th> operation </th>
               </tr>
               </thead>

               <tbody>
               <c:forEach var="book" items="${requestScope.get('list')}">
                   <tr>
                       <td>${book.getBookID()}</td>
                       <td>${book.getBookName()}</td>
                       <td>${book.getBookCounts()}</td>
                       <td>${book.getDetail()}</td>
                       <td>
                           <a href="${pageContext.request.contextPath}/book/toUpdateBook?id=${book.getBookID()}"> change </a> |
                           <a href="${pageContext.request.contextPath}/book/del/${book.getBookID()}"> Delete </a>
                       </td>
                   </tr>
               </c:forEach>
               </tbody>
           </table>
       </div>
   </div>
</div>

4、BookController Class writing , Method 2 ： Add books

@RequestMapping("/toAddBook")
public String toAddPaper() {
    
   return "addBook";
}

@RequestMapping("/addBook")
public String addPaper(Books books) {
    
   System.out.println(books);
   bookService.addBook(books);
   return "redirect:/book/allBook";
}

5、 Add a Book page ：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> New books </title>
   <meta name="viewport" content="width=device-width, initial-scale=1.0">
   <!--  introduce  Bootstrap -->
   <link href="https://cdn.bootcss.com/bootstrap/3.3.7/css/bootstrap.min.css" rel="stylesheet">
</head>
<body>
<div class="container">

   <div class="row clearfix">
       <div class="col-md-12 column">
           <div class="page-header">
               <h1>
                   <small> New books </small>
               </h1>
           </div>
       </div>
   </div>
   <form action="${pageContext.request.contextPath}/book/addBook" method="post">
       Book name ：<input type="text" name="bookName"><br><br><br>
       Number of books ：<input type="text" name="bookCounts"><br><br><br>
       Book details ：<input type="text" name="detail"><br><br><br>
       <input type="submit" value=" add to ">
   </form>

</div>

6、BookController Class writing , Method 3 ： Revise a book

@RequestMapping("/toUpdateBook")
public String toUpdateBook(Model model, int id) {
    
   Books books = bookService.queryBookById(id);
   System.out.println(books);
   model.addAttribute("book",books );
   return "updateBook";
}

@RequestMapping("/updateBook")
public String updateBook(Model model, Books book) {
    
   System.out.println(book);
   bookService.updateBook(book);
   Books books = bookService.queryBookById(book.getBookID());
   model.addAttribute("books", books);
   return "redirect:/book/allBook";
}

7、 Modify the book page updateBook.jsp

<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
   <title> Modify the information </title>
   <meta name="viewport" content="width=device-width, initial-scale=1.0">
   <!--  introduce  Bootstrap -->
   <link href="https://cdn.bootcss.com/bootstrap/3.3.7/css/bootstrap.min.css" rel="stylesheet">
</head>
<body>
<div class="container">

   <div class="row clearfix">
       <div class="col-md-12 column">
           <div class="page-header">
               <h1>
                   <small> Modify the information </small>
               </h1>
           </div>
       </div>
   </div>

   <form action="${pageContext.request.contextPath}/book/updateBook" method="post">
       <input type="hidden" name="bookID" value="${book.getBookID()}"/>
       Book name ：<input type="text" name="bookName" value="${book.getBookName()}"/>
       Number of books ：<input type="text" name="bookCounts" value="${book.getBookCounts()}"/>
       Book details ：<input type="text" name="detail" value="${book.getDetail() }"/>
       <input type="submit" value=" Submit "/>
   </form>

</div>

8、BookController Class writing , Method four ： Delete books

@RequestMapping("/del/{bookId}")
public String deleteBook(@PathVariable("bookId") int id) {
    
   bookService.deleteBookById(id);
   return "redirect:/book/allBook";
}