spring 一般增量sql 修改放在哪个目录

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墨舞青云 2024-12-10 10:54:08

文章标签 java spring mybatis mysql xml 文章分类 架构后端开发

SpringMVC项目实现增删改查

一、创建MAVEN项目

二、把项目设置成WEB项目

选择项目–>右键–>Add Framework Support

spring 一般增量sql 修改放在哪个目录_mysql

选中Web Application 点击确定

spring 一般增量sql 修改放在哪个目录_spring_02

有这个web/WEB-INF文件夹说明创建成功

spring 一般增量sql 修改放在哪个目录_mybatis_03

三、打开pom.xml添加依赖，静态资源导出

依赖：junit，数据库驱动，连接池，servlet，jsp，mybatis，mybatis-spring，spring

<dependencies>
        <!--junit-->
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>4.13.1</version>
        </dependency>
        <!--数据库驱动-->
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>8.0.23</version>
        </dependency>
        <!--数据库连接池-->
        <dependency>
            <groupId>com.mchange</groupId>
            <artifactId>c3p0</artifactId>
            <version>0.9.5.5</version>
        </dependency>

        <!--servlet - JSP-->
        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>servlet-api</artifactId>
            <version>2.5</version>
        </dependency>
        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>jstl</artifactId>
            <version>1.2</version>
        </dependency>
        <dependency>
            <groupId>javax.servlet.jsp</groupId>
            <artifactId>jsp-api</artifactId>
            <version>2.2.1-b03</version>
        </dependency>

        <!--Mybatis-->
        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis</artifactId>
            <version>3.5.6</version>
        </dependency>
        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis-spring</artifactId>
            <version>2.0.6</version>
        </dependency>
        <!--spring-->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-webmvc</artifactId>
            <version>5.3.5</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-jdbc</artifactId>
            <version>5.3.5</version>
        </dependency>
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <version>1.18.20</version>
        </dependency>
    </dependencies>

静态资源导出

<!--静态资源导出-->
    <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>

等待依赖下载完成即可

spring 一般增量sql 修改放在哪个目录_mybatis_04

四、添加配置文件
打开web文件夹下的web.xml，添加DispatchServlet以及乱码过滤

<?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">
    <!--DispatchServlet-->
    <servlet>
    	 <!--名字自定义，和下面的servlet-name一致-->
        <servlet-name>springmvc</servlet-name>
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
        <init-param>
            <param-name>contextConfigLocation</param-name>
            <param-value>classpath:applicationContext.xml</param-value>
        </init-param>
        <load-on-startup>1</load-on-startup>
    </servlet>
    <servlet-mapping>
        <servlet-name>springmvc</servlet-name>
        <url-pattern>/</url-pattern>
    </servlet-mapping>
    
    <!--乱码过滤-->
    <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-->
    <session-config>
        <session-timeout>15</session-timeout>
    </session-config>
</web-app>

在src/main/resources下创建applicationContext.xml
在src/main/resources创建database.properties并配置

jdbc.driver=com.mysql.cj.jdbc.Driver
jdbc.url=jdbc:mysql://127.0.0.1:3306/数据库名?autoReconnect=true&useUnicode=true&characterEncoding=utf-8&useSSL=false&serverTimezone=Asia/Shanghai
jdbc.username=数据库账号
jdbc.password=数据库密码

这里注意：mysql8.0以上建议使用jdbc.driver=com.mysql.cj.jdbc.Driver，8.0以下建议使用jdbc.driver=com.mysql.jdbc.Driver

创建要使用的package：controller、dao、pojo、service

spring 一般增量sql 修改放在哪个目录_java_05

在pojo包下创建Books实体类

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

在service下创建接口BookService

public interface BookService {
    //增加
    int addBook(Books books);
    //删除
    int deleteBookById(int id);
    //更新
    int updateBook(Books books);
    //查询
    Books queryBookById(int id);
    //查询全部
    List<Books> queryAllBooks();
    //模糊查询
    List<Books> queryBookByName(String bookName);
}

创建BookService的实现类BookServiceImpl

public class BookServiceImpl implements BookService {

    //service调dao层：组合Dao
    private BookMapper bookMapper;
    public void setBookMapper(BookMapper bookMapper) {
        this.bookMapper = bookMapper;
    }

    @Override
    public int addBook(Books books) {
        return bookMapper.addBook(books);
    }

    @Override
    public int deleteBookById(int id) {
        return bookMapper.deleteBookById(id);
    }

    @Override
    public int updateBook(Books books) {
        return bookMapper.updateBook(books);
    }

    @Override
    public Books queryBookById(int id) {
        return bookMapper.queryBookById(id);
    }

    @Override
    public List<Books> queryAllBooks() {
        return bookMapper.queryAllBooks();
    }

    @Override
    public List<Books> queryBookByName(String bookName) {
        return bookMapper.queryBookByName(bookName);
    }
}

在dao包下创建接口类BookMapper

public interface BookMapper {
    //增加
    int addBook(Books books);

    //删除
    int deleteBookById(@Param("bookId") int id);

    //更新
    int updateBook(Books books);

    //查询
    Books queryBookById(@Param("bookId") int id);

    //查询全部
    List<Books> queryAllBooks();

    //模糊查询
    List<Books> queryBookByName(@Param("bookName") String bookName);
}

创建BookMapper.xml实现sql

<?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.swt.dao.BookMapper">
    <insert id="addBook" parameterType="Books">
        insert into ssmbuild.books (bookName, bookCounts, detail)
        values (#{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" resultType="Books">
        select * from ssmbuild.books
        where bookID=#{bookId};
    </select>

    <select id="queryAllBooks" resultType="Books">
        select * from ssmbuild.books;
    </select>

    <select id="queryBookByName" resultType="Books">
        select * from ssmbuild.books where bookName like concat('%',#{bookName},'%');
    </select>
</mapper>

在src/main/resources创建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:contexxt="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">

    <!--1.关键数据库文件-->
    <contexxt:property-placeholder location="classpath:database.properties"/>

    <!--2.连接池
        dbcp:半自动化操作，不能够自动连接
        c3p0:自动化操作（自动加载配置文件，并且可以自动设置到对象中）
        druid:
        hikari:
    -->
    <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
        <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连接池的私有属性-->
        <property name="maxPoolSize" value="30"/>
        <property name="minPoolSize" value="10"/>
        <property name="initialPoolSize" value="10"/>
        <!--关闭连接池不自动commit-->
        <property name="autoCommitOnClose" value="false"/>
        <!--获取连接池超时时间-->
        <property name="checkoutTimeout" value="10000"/>
        <!--获取当前连接失败重试次数-->
        <property name="acquireRetryAttempts" value="2"/>
    </bean>

    <!--3.sqlSessionFactory-->
    <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
        <property name="dataSource" ref="dataSource"/>
        <!--绑定myBatis的配置文件-->
        <property name="configLocation" value="classpath:mybatis-config.xml"/>
    </bean>

    <!--4.配置dao接口扫描包，动态的实现了dao接口可以注入到Spring容器中-->
    <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        <!--注入sqlSessionFactory-->
        <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"/>
        <!--要扫描的dao包-->
        <property name="basePackage" value="com.swt.dao"/>
    </bean>

</beans>

在src/main/resources创建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.swt.pojo"/>
    </typeAliases>

    <mappers>
        <mapper class="com.swt.dao.BookMapper"/>
    </mappers>
</configuration>

在src/main/resources创建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 https://www.springframework.org/schema/context/spring-context.xsd">

    <!--1.扫描service下的包-->
    <context:component-scan base-package="com.swt.service"/>

    <!--2.将我们的所有业务类注入到spring，可以通过配置或者注解实现-->
    <bean id="BookServiceImpl" class="com.swt.service.BookServiceImpl">
        <property name="bookMapper" ref="bookMapper"/>
    </bean>

    <!--3.声明事物配置-->
    <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
        <!--注入数据源-->
        <property name="dataSource" ref="dataSource"/>
    </bean>
</beans>

web/WEB-INF下创建jsp文件夹

spring 一般增量sql 修改放在哪个目录_java_06

在src/main/resources创建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:mvc="http://www.springframework.org/schema/mvc"
       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/mvc
       http://www.springframework.org/schema/mvc/spring-mvc.xsd http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd">

    <!--1.注解驱动-->
    <mvc:annotation-driven/>

    <!--2.静态资源过滤-->
    <mvc:default-servlet-handler/>

    <!--3.扫描包 controller-->
    <context:component-scan base-package="com.swt.controller"/>

    <!--4.视图解析器-->
    <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver" id="resolver">
        <!--前缀-->
        <property name="prefix" value="/WEB-INF/jsp/"/>
        <!--后缀-->
        <property name="suffix" value=".jsp"/>
    </bean>
</beans>

最后在applicationContext.xml中加入

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

配置文件完成！

五、创建数据库，添加数据

打开数据库可视化界面，执行以下SQL

CREATE DATABASE `ssmbuild`;

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(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');

注意：此数据库名和database.properties配置文件夹中的文件名必须保持一致

六、创建jsp文件
创建之前首先先在index.jsp中添加进入书籍按钮

<%--
  Created by IntelliJ IDEA.
  User: swt
  Date: 2021/4/23
  Time: 14:13
  To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
  <head>
    <title>首页</title>

    <style>
      a{
        text-decoration: none;
        color: black;
        font-size: 18px;
      }
      h3{
        width: 150px;
        height: 38px;
        margin: 100px auto;
        text-align: center;
        line-height: 38px;
        background: deepskyblue;
        border-radius: 5px;
      }
    </style>
  </head>
  <body>
  <h3>
    <a href="${pageContext.request.contextPath}/book/allBooks">进入书籍页面</a>
  </h3>
  </body>
</html>

在web/WEB-INF/jsp下创建allBooks.jsp

<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
    <head>
        <title>书籍展示页面</title>
        <%--BootStrap--%>
        <link href="https://cdn.staticfile.org/twitter-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>书籍列表 -------- 显示所有书籍</small>
                        </h1>
                    </div>
                </div>
                <div class="row clearfix">
                    <div class="col-md-4 column" style="float: left">
                        <a class="btn btn-primary" href="${pageContext.request.contextPath}/book/toAddBook">新增书籍</a>
                    </div>
                    <div class="col-md-4 column">
                        <form action="${pageContext.request.contextPath}/book/queryBook" method="post" style="float: right" class="form-inline">
                            <input type="text" name="queryBookName" class="form-control" placeholder="请输入书籍名称" required>
                            <input type="submit" value="查询" class="btn btn-primary">
                        </form>
                    </div>
                </div>
            </div>
        </div>

        <div class="row clearfix">
            <div class="col-md-12 column">
                <table class="table table-hover table-striped">
                    <thead>
                    <tr>
                        <th>书籍编号</th>
                        <th>书籍名称</th>
                        <th>书籍数量</th>
                        <th>书籍详情</th>
                        <th>操作</th>
                    </tr>
                    </thead>

                    <%--书籍从数据库中查询出来，从这个隶属台中遍历出来  foreach--%>
                    <tbody>
                        <c:forEach var="book" items="${list}">
                            <tr>
                                <td>${book.bookID}</td>
                                <td>${book.bookName}</td>
                                <td>${book.bookCounts}</td>
                                <td>${book.detail}</td>
                                <td>
                                    <span style="color: red; font-weight: bold">${error}</span>
                                    <a href="${pageContext.request.contextPath}/book/toUpdate?id=${book.bookID}">修改</a>
                                      |  
                                    <a href="${pageContext.request.contextPath}/book/deleteBook/${book.bookID}">删除</a>
                                </td>
                            </tr>
                        </c:forEach>
                    </tbody>
                </table>
            </div>

        </div>

    </body>
</html>

addBook.jsp

<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
    <head>
        <title>新增书籍</title>
        <link href="https://cdn.staticfile.org/twitter-bootstrap/3.3.7/css/bootstrap.min.css" rel="stylesheet">    </head>

    </head>
    <body>
        <div class="container">
            <div class="row clearfix">
                <div class="col-md-12 column">
                    <div class="page-header">
                        <h1>
                            <small>新增书籍</small>
                        </h1>
                    </div>
                </div>
            </div>
        </div>

        <form action="${pageContext.request.contextPath}/book/addBook" method="post">
            <div class="form-group">
                <label>书籍名称：</label>
                <input type="text" name="bookName" class="form-control" required>
            </div>
            <div class="form-group">
                <label>书籍数量：</label>
                <input type="text" name="bookCounts" class="form-control" required>
            </div>
            <div class="form-group">
                <label>书籍描述：</label>
                <input type="text" name="detail" class="form-control" required>
            </div>
            <div class="form-group">
                <input type="submit" class="form-control" value="添加">
            </div>
        </form>
    </body>
</html>

updateBook.jsp

<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
    <head>
        <title>修改书籍</title>
        <link href="https://cdn.staticfile.org/twitter-bootstrap/3.3.7/css/bootstrap.min.css" rel="stylesheet">    </head>

    </head>
    <body>
        <div class="container">
            <div class="row clearfix">
                <div class="col-md-12 column">
                    <div class="page-header">
                        <h1>
                            <small>修改书籍</small>
                        </h1>
                    </div>
                </div>
            </div>
        </div>

        <form action="${pageContext.request.contextPath}/book/updateBook" method="post">
            <%--配置隐藏域--%>
            <input type="hidden" name="bookID" value="${QBook.bookID}">
            <div class="form-group">
                <label>书籍名称：</label>
                <input type="text" name="bookName" value="${QBook.bookName}" class="form-control" required>
            </div>
            <div class="form-group">
                <label>书籍数量：</label>
                <input type="text" name="bookCounts" value="${QBook.bookCounts}"  class="form-control" required>
            </div>
            <div class="form-group">
                <label>书籍描述：</label>
                <input type="text" name="detail" value="${QBook.detail}"  class="form-control" required>
            </div>
            <div class="form-group">
                <input type="submit" class="form-control" value="修改">
            </div>
        </form>
    </body>
</html>

最后，创建BookController实现类并配置tomcat启动就可以了

package com.swt.controller;

import com.swt.pojo.Books;
import com.swt.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.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;

import java.util.ArrayList;
import java.util.List;

@Controller
@RequestMapping("/book")
public class BookController {
    //controller 调 service层
    @Autowired
    @Qualifier("BookServiceImpl")
    private BookService bookService;

    //查询全部的书籍，并且返回到一个书籍的展示页面
    @RequestMapping("/allBooks")
    public String getAllBooks(Model model) {
        List<Books> list = bookService.queryAllBooks();
        model.addAttribute("list", list);

        return "allBooks";
    }

    //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);

        //重定向到我们的 @RequestMapping("/allBooks") 请求
        return "redirect:/book/allBooks";
    }

    //跳转到修改页面
    @RequestMapping("/toUpdate")
    public String toUpdatePaper(int id, Model model) {
        Books books = bookService.queryBookById(id);
        model.addAttribute("QBook", books);
        return "updateBook";
    }

    //修改书籍
    @RequestMapping("/updateBook")
    public String updateBook(Books books) {
        System.out.println("updateBook===" + books);
        bookService.updateBook(books);
        //重定向到我们的 @RequestMapping("/allBooks") 请求
        return "redirect:/book/allBooks";
    }

    //删除书籍
    @RequestMapping("/deleteBook/{bookID}")
    public String deleteBook(@PathVariable("bookID") int id) {
        bookService.deleteBookById(id);
        //重定向到我们的 @RequestMapping("/allBooks") 请求
        return "redirect:/book/allBooks";
    }

    //书籍查询
    @RequestMapping("/queryBook")
    public String queryBookName(String queryBookName, Model model) {
        List<Books> list = bookService.queryBookByName(queryBookName);
        if (list.size() == 0) {
            return "redirect:/book/allBooks";
        }
        model.addAttribute("list", list);
        return "allBooks";
    }
}

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