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前言

SSM勸退的90%理由就是配置太煩了,傳說(shuō)中的配置地獄纬乍。
那么這篇博文就是用了kari本人平時(shí)的開(kāi)發(fā)習(xí)慣來(lái)配置的,做的一套SSM整合的增刪改查。比如Kari平時(shí)用lombok來(lái)簡(jiǎn)化pojo編寫(xiě),用c3p0數(shù)據(jù)庫(kù)連接池。那這些都沒(méi)有關(guān)系,同學(xué)們不用在乎這個(gè),這些都只不過(guò)融入了下面的配置中瞬痘。而且kari選擇了maven項(xiàng)目,并且在maven中加入了阿里倉(cāng)庫(kù)的遠(yuǎn)程依賴(lài),所以項(xiàng)目導(dǎo)入速度是比較快的。

我們不可能每次做項(xiàng)目都自己整合一次ssm,一般都用一個(gè)像這種以book數(shù)據(jù)表為基礎(chǔ)的基礎(chǔ)增刪改查的基本項(xiàng)目,保存基本版本,以后每次做項(xiàng)目的時(shí)候復(fù)制這個(gè)基礎(chǔ)項(xiàng)目,然后改代碼就行了序臂。比如這個(gè)項(xiàng)目里用的是book類(lèi),那下一次項(xiàng)目用user類(lèi)的話(huà)就依葫蘆畫(huà)瓢改就行了席爽。

建議先跟著本篇博文進(jìn)行項(xiàng)目配置,如果實(shí)在不行就下載kari上傳到百度網(wǎng)盤(pán)的成品
鏈接: https://pan.baidu.com/s/1lkpSHKzfP4Hk28fWZnn3nw 提取碼: 3fan

image.png

數(shù)據(jù)庫(kù)環(huán)境

一次性插入可能存在問(wèn)題,建議先創(chuàng)庫(kù),再創(chuàng)表,最后插入記錄

CREATE DATABASE `ssmbuild`;

USE `ssmbuild`;

DROP TABLE IF EXISTS `books`;

CREATE TABLE `books` (
`bookID` INT(10) NOT NULL AUTO_INCREMENT COMMENT '書(shū)id',
`bookName` VARCHAR(100) NOT NULL COMMENT '書(shū)名',
`bookCounts` INT(11) NOT NULL COMMENT '數(shù)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,'從入門(mén)到放棄'),
(2,'MySQL',10,'從刪庫(kù)到跑路'),
(3,'Linux',5,'從進(jìn)門(mén)到進(jìn)牢');

基本環(huán)境搭建

image.png

image.png

1、新建一Maven項(xiàng)目（我起名ssmbuild） 勾選webapp辩尊。 添加web的支持

2、導(dǎo)入相關(guān)的pom依賴(lài)？导（獎(jiǎng)以下代碼復(fù)制到pom.xml中）

<dependencies>
    <!-- https://mvnrepository.com/artifact/com.fasterxml.jackson.core/jackson-databind -->
    <dependency>
        <groupId>com.alibaba</groupId>
        <artifactId>fastjson</artifactId>
        <version>1.2.47</version>
    </dependency>


    <!--Junit-->
    <dependency>
        <groupId>junit</groupId>
        <artifactId>junit</artifactId>
        <version>4.12</version>
    </dependency>
    <!--數(shù)據(jù)庫(kù)驅(qū)動(dòng)-->
    <dependency>
        <groupId>mysql</groupId>
        <artifactId>mysql-connector-java</artifactId>
        <version>5.1.47</version>
    </dependency>
    <!-- 數(shù)據(jù)庫(kù)連接池 -->
    <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>
    <!--lombok-->
    <dependency>
        <groupId>org.projectlombok</groupId>
        <artifactId>lombok</artifactId>
        <version>1.18.12</version>
        <scope>provided</scope>
    </dependency>

</dependencies>

3摄欲、Maven資源過(guò)濾設(shè)置

    <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、建立基本結(jié)構(gòu)和配置框架疮薇！

• com.chk.pojo

• com.chk.mapper

• com.chk.service

• com.chk.controller

  
  
  image.png

• 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層編寫(xiě)

1胸墙、數(shù)據(jù)庫(kù)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=root

2、編寫(xiě)MyBatis的核心配置文件 mybatis-config.xml

<!DOCTYPE configuration
        PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
        "http://mybatis.org/dtd/mybatis-3-config.dtd">
<configuration>
    <typeAliases>
        <package name="com.chk.pojo"/>
    </typeAliases>
    <mappers>
        <mapper resource="com/chk/mapper/BookMapper.xml"/>
    </mappers>
</configuration>

3按咒、編寫(xiě)數(shù)據(jù)表對(duì)應(yīng)的實(shí)體類(lèi) com.chk.pojo.Books

解釋 :這里我寫(xiě)了
@AllArgsConstructor
@NoArgsConstructor
@Data
三個(gè)注解,這個(gè)是lombok的注解方法迟隅，寫(xiě)上這三個(gè)注解就不用再手動(dòng)去生成有參無(wú)參構(gòu)造包括get set。因?yàn)閘ombok已經(jīng)幫我們生成了励七。那lombok需要下載嗎智袭？不用的,之前在pom.xml里已經(jīng)加入了lombok的依賴(lài)了。

package com.chk.pojo;

import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;

@AllArgsConstructor
@NoArgsConstructor
@Data
public class Books {
    private int bookID;
    private String bookName;
    private int bookCounts;
    private String detail;
}

4掠抬、編寫(xiě) Mapper層的 Mapper接口

BookMapper

package com.chk.mapper;

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

public interface BookMapper {
    //增加一個(gè)Book
    int addBook(Books book);

    //根據(jù)id刪除一個(gè)Book
    int deleteBookById(int id);

    //更新Book
    int updateBook(Books books);

    //根據(jù)id查詢(xún),返回一個(gè)Book
    Books queryBookById(int id);

    //查詢(xún)?nèi)緽ook,返回list集合
    List<Books> queryAllBook();
}

5吼野、編寫(xiě)接口對(duì)應(yīng)的 Mapper.xml 文件。

BookMapper.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="com.chk.mapper.BookMapper">

    <!--增加一個(gè)Book-->
    <insert id="addBook" parameterType="Books">
      insert into ssmbuild.books(bookName,bookCounts,detail)
      values (#{bookName}, #{bookCounts}, #{detail})
   </insert>

    <!--根據(jù)id刪除一個(gè)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>

    <!--根據(jù)id查詢(xún),返回一個(gè)Book-->
    <select id="queryBookById" resultType="Books">
      select * from ssmbuild.books
      where bookID = #{bookID}
   </select>

    <!--查詢(xún)?nèi)緽ook-->
    <select id="queryAllBook" resultType="Books">
      SELECT * from ssmbuild.books
   </select>
</mapper>

6两波、編寫(xiě)Service層的接口和實(shí)現(xiàn)類(lèi)

接口: BookService

package com.chk.service;

import com.chk.pojo.Books;

import java.util.List;

public interface BookService {
    //增加一個(gè)Book
    int addBook(Books book);
    //根據(jù)id刪除一個(gè)Book
    int deleteBookById(int id);
    //更新Book
    int updateBook(Books books);
    //根據(jù)id查詢(xún),返回一個(gè)Book
    Books queryBookById(int id);
    //查詢(xún)?nèi)緽ook,返回list集合
    List<Books> queryAllBook();
}

實(shí)現(xiàn)類(lèi):BookServiceImpl

package com.chk.service;

import com.chk.mapper.BookMapper;
import com.chk.pojo.Books;
import java.util.List;

public class BookServiceImpl implements BookService {
    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();
    }
}

OK瞳步，到此闷哆，底層需求操作編寫(xiě)完畢！

Spring層

1谚攒、配置Spring整合MyBatis阳准，我們這里數(shù)據(jù)源使用c3p0連接池

(不用大家去下載什么,一開(kāi)始在pom.xml已經(jīng)導(dǎo)入了依賴(lài)）

2、我們?nèi)ゾ帉?xiě)Spring整合Mybatis的相關(guān)的配置文件

spring-mapper.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">

    <!-- 配置整合mybatis -->
    <!-- 1.關(guān)聯(lián)數(shù)據(jù)庫(kù)文件 -->
    <context:property-placeholder location="classpath:database.properties"/>

    <!-- 2.數(shù)據(jù)庫(kù)連接池 -->
    <!--數(shù)據(jù)庫(kù)連接池
        dbcp 半自動(dòng)化操作 不能自動(dòng)連接
        c3p0 自動(dòng)化操作（自動(dòng)的加載配置文件 并且設(shè)置到對(duì)象里面）
    -->
    <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
        <!-- 配置連接池屬性 -->
        <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連接池的私有屬性 -->
        <property name="maxPoolSize" value="30"/>
        <property name="minPoolSize" value="10"/>
        <!-- 關(guān)閉連接后不自動(dòng)commit -->
        <property name="autoCommitOnClose" value="false"/>
        <!-- 獲取連接超時(shí)時(shí)間 -->
        <property name="checkoutTimeout" value="10000"/>
        <!-- 當(dāng)獲取連接失敗重試次數(shù) -->
        <property name="acquireRetryAttempts" value="2"/>
    </bean>

    <!-- 3.配置SqlSessionFactory對(duì)象 -->
    <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
        <!-- 注入數(shù)據(jù)庫(kù)連接池 -->
        <property name="dataSource" ref="dataSource"/>
        <!-- 配置MyBaties全局配置文件:mybatis-config.xml -->
        <property name="configLocation" value="classpath:mybatis-config.xml"/>
    </bean>

    <!-- 4.配置掃描Dao接口包馏臭，動(dòng)態(tài)實(shí)現(xiàn)Dao接口注入到spring容器中 -->
    <!--解釋 ：https://www.cnblogs.com/jpfss/p/7799806.html-->
    <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        <!-- 注入sqlSessionFactory -->
        <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"/>
        <!-- 給出需要掃描Dao接口包 -->
        <property name="basePackage" value="com.chk.mapper"/>
    </bean>
</beans>

3野蝇、Spring整合service層

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

    <!-- 掃描service相關(guān)的bean -->
    <context:component-scan base-package="com.chk.service" />

    <!--BookServiceImpl注入到IOC容器中-->
    <bean id="BookServiceImpl" class="com.chk.service.BookServiceImpl">
        <property name="bookMapper" ref="bookMapper"/>
    </bean>

    <!-- 配置事務(wù)管理器 -->
    <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
        <!-- 注入數(shù)據(jù)庫(kù)連接池 -->
        <property name="dataSource" ref="dataSource" />
    </bean>
</beans>

Spring層搞定!

SpringMVC層

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>
            <!--一定要注意:我們這里加載的是總的配置文件括儒，之前被這里坑了绕沈！-->
            <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過(guò)期時(shí)間-->
    <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">

    <!-- 配置SpringMVC -->
    <!-- 1.開(kāi)啟SpringMVC注解驅(qū)動(dòng) -->
    <mvc:annotation-driven />
    <!-- 2.靜態(tài)資源默認(rèn)servlet配置-->
    <mvc:default-servlet-handler/>

    <!-- 3.配置jsp 顯示ViewResolver視圖解析器 -->
    <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.掃描web相關(guān)的bean -->
    <context:component-scan base-package="com.chk.controller" />

</beans>

3帮寻、Spring配置整合文件乍狐，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-mapper.xml"/>
    <import resource="spring-service.xml"/>
    <import resource="spring-mvc.xml"/>
</beans>

配置文件，暫時(shí)結(jié)束

Controller 和 視圖層編寫(xiě)

1固逗、BookController 類(lèi)編寫(xiě) 浅蚪， 方法一：查詢(xún)?nèi)繒?shū)籍

@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、編寫(xiě)首頁(yè) index.jsp

<!DOCTYPE HTML>
<html>
<head>
   <title>首頁(yè)</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">點(diǎn)擊進(jìn)入列表頁(yè)</a>
</h3>
</body>
</html>

3烫罩、書(shū)籍列表頁(yè)面 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>書(shū)籍列表</title>
   <meta name="viewport" content="width=device-width, initial-scale=1.0">
   <!-- 引入 Bootstrap -->
   <link  rel="stylesheet">
</head>
<body>

<div class="container">

   <div class="row clearfix">
       <div class="col-md-12 column">
           <div class="page-header">
               <h1>
                   <small>書(shū)籍列表 —— 顯示所有書(shū)籍</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">新增</a>
       </div>
   </div>

   <div class="row clearfix">
       <div class="col-md-12 column">
           <table class="table table-hover table-striped">
               <thead>
               <tr>
                   <th>書(shū)籍編號(hào)</th>
                   <th>書(shū)籍名字</th>
                   <th>書(shū)籍?dāng)?shù)量</th>
                   <th>書(shū)籍詳情</th>
                   <th>操作</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=${book.getBookID()}">更改</a> |
                           <a href="${pageContext.request.contextPath}/book/del/${book.getBookID()}">刪除</a>
                       </td>
                   </tr>
               </c:forEach>
               </tbody>
           </table>
       </div>
   </div>
</div>
</body>
</html>

4惜傲、BookController 類(lèi)編寫(xiě) ， 方法二：添加書(shū)籍

@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贝攒、添加書(shū)籍頁(yè)面：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>新增書(shū)籍</title>
   <meta name="viewport" content="width=device-width, initial-scale=1.0">
   <!-- 引入 Bootstrap -->
   <link  rel="stylesheet">
</head>
<body>
<div class="container">

   <div class="row clearfix">
       <div class="col-md-12 column">
           <div class="page-header">
               <h1>
                   <small>新增書(shū)籍</small>
               </h1>
           </div>
       </div>
   </div>
   <form action="${pageContext.request.contextPath}/book/addBook" method="post">
      書(shū)籍名稱(chēng)：<input type="text" name="bookName"><br><br><br>
      書(shū)籍?dāng)?shù)量：<input type="text" name="bookCounts"><br><br><br>
      書(shū)籍詳情：<input type="text" name="detail"><br><br><br>
       <input type="submit" value="添加">
   </form>
</div>
</body>
</html>

6盗誊、BookController 類(lèi)編寫(xiě) ， 方法三：修改書(shū)籍

@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隘弊、修改書(shū)籍頁(yè)面 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>修改信息</title>
   <meta name="viewport" content="width=device-width, initial-scale=1.0">
   <!-- 引入 Bootstrap -->
   <link  rel="stylesheet">
</head>
<body>
<div class="container">

   <div class="row clearfix">
       <div class="col-md-12 column">
           <div class="page-header">
               <h1>
                   <small>修改信息</small>
               </h1>
           </div>
       </div>
   </div>

   <form action="${pageContext.request.contextPath}/book/updateBook" method="post">
       <input type="hidden" name="bookID" value="${book.getBookID()}"/>
      書(shū)籍名稱(chēng)：<input type="text" name="bookName" value="${book.getBookName()}"/>
      書(shū)籍?dāng)?shù)量：<input type="text" name="bookCounts" value="${book.getBookCounts()}"/>
      書(shū)籍詳情：<input type="text" name="detail" value="${book.getDetail() }"/>
       <input type="submit" value="提交"/>
   </form>
</div>
</body>
</html>

8哈踱、BookController 類(lèi)編寫(xiě) ， 方法四：刪除書(shū)籍

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

配置Tomcat梨熙，然后運(yùn)行

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我用的是IDEA,如果同學(xué)們用的是esclipse的話(huà)就還和以前一樣配置tomcat
如果用idea啟動(dòng)這個(gè)項(xiàng)目不了,十有八九是因?yàn)橐婚_(kāi)始創(chuàng)建maven項(xiàng)目的時(shí)候創(chuàng)建的是空白項(xiàng)目开镣。請(qǐng)跟我這樣做往lib里添加jar包。

image.png

image.png

image.png

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esclipse如果遇到了類(lèi)似問(wèn)題,自行百度怎么往lib下添加jar包 但是一般esclipse創(chuàng)建maven的時(shí)候只要勾選webapp就沒(méi)問(wèn)題

最后運(yùn)行效果

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關(guān)注kari的git博客https://chenhuakai.github.io/