SSM整合小Demo
SSM整合小Demo
开发工具
- IDEA2020
- Maven3.6.3
- MySql
准备环境 配置文件 jar包
我的pom.xml里面这次用到的一些jar包的坐标如下
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<maven.compiler.source>1.7</maven.compiler.source>
<maven.compiler.target>1.7</maven.compiler.target>
<spring.version>4.1.1.RELEASE</spring.version> //控制Jar包的版本
</properties>
<dependencies>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.11</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context-support</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-core</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-web</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-aop</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-jdbc</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-beans</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-tx</artifactId>
<version>${spring.version}</version>
</dependency>
<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>2.0</version>
</dependency>
<dependency>
<groupId>jstl</groupId>
<artifactId>jstl</artifactId>
<version>1.2</version>
</dependency>
<dependency>
<groupId>org.apache.taglibs</groupId>
<artifactId>taglibs-standard-impl</artifactId>
<version>1.2.5</version>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>5.1.48</version>
</dependency>
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis</artifactId>
<version>3.5.4</version>
</dependency>
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis-spring</artifactId>
<version>2.0.4</version>
</dependency>
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<version>1.16.6</version>
</dependency>
<dependency>
<groupId>joda-time</groupId>
<artifactId>joda-time</artifactId>
<version>2.9.1</version>
</dependency>
<dependency>
<groupId>log4j</groupId>
<artifactId>log4j</artifactId>
<version>1.2.17</version>
</dependency>
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>druid</artifactId>
<version>1.0.25</version>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-databind</artifactId>
<version>2.9.8</version>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-core</artifactId>
<version>2.9.8</version>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-annotations</artifactId>
<version>2.9.0</version>
</dependency>
<dependency>
<groupId>com.mchange</groupId>
<artifactId>c3p0</artifactId>
<version>0.9.5.5</version>
</dependency>
</dependencies>
最最最基本的数据库配置文件
jdbc.driver=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql://localhost:3306/ssm
jdbc.username=root
jdbc.password=ok
这两个基本的配置文件完成之后，开始正式进我小Demo的开发，苦笑哈哈。
今天的这个SSM整合小Demo很简单，一个对图书的查询，一个对图书的添加。非常的简单基础，主要是练习一下
SSM的整合。、
后台代码实现
首先我们从实体类开始
这里很简单四个属性 三个注解把它搞定，我来解释这三个注解
- @Data 封装属性 让所有的属性生成Getter Setter方法方法
- @NoArgsConstructor 生成无参的构造方法
- @AllArgsConstructor 生成带参的构造方法
使用这三个注解 我们需要导入lombok的jar包坐标，上面pom.xml里面有，并且IDEA需要安装Lombok的插件
package com.it.entity;
import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;
@Data
@NoArgsConstructor
@AllArgsConstructor
public class Book {
private int bid;
private String bname;
private int bcount;
private int bmoney;
private String bauthor;
}
Dao层AndMapper
dao层就简单的两个方法
mapper也是对应的映射
package com.it.dao;
import com.it.entity.Book;
import org.springframework.stereotype.Repository;
import java.util.List;
@Repository //使这个类被spring去管理
public interface BookDao {
List<Book> findListBook();
void addBook(Book book);
}
//Mapper.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.it.dao.BookDao">
<resultMap id="BookReslut" type="Book">
<result property="bid" column="bid" ></result>
<result property="bname" column="bname" ></result>
<result property="bcount" column="bcount" ></result>
<result property="bmoney" column="bmoney" ></result>
<result property="bauthor" column="bauthor" ></result>
</resultMap>
<!--查询-->
<select id="findListBook" resultMap="BookReslut">
select *from Book
</select>
<!--添加-->
<insert id="addBook" parameterType="Book">
insert into book values(#{bid},#{bname},#{bcount},#{bmoney},#{bauthor})
</insert>
</mapper>
Service And Impl
额，这里也没什么好说的。哭笑哭笑
package com.it.service;
import com.it.entity.Book;
import java.util.List;
public interface BookService {
List<Book> findListBook();
void addBook(Book book);
}
//实现类
package com.it.service.impl;
import com.it.dao.BookDao;
import com.it.entity.Book;
import com.it.service.BookService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;
import java.util.List;
@Service
public class BookServiceImpl implements BookService {
@Autowired
BookDao bookDao;
@Override
public List<Book> findListBook() {
System.out.println("这里是Service");
return bookDao.findListBook();
}
@Transactional //基本的事务注解
@Override
public void addBook(Book book) {
bookDao.addBook(book);
}
}
Controller层
package com.it.controller;
import com.it.entity.Book;
import com.it.service.BookService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.ui.ModelMap;
import org.springframework.web.bind.annotation.RequestMapping;
import java.util.List;
@Controller
public class BookController {
@Autowired
BookService bookService;
@RequestMapping("QueryListBook")
public String QuerylistBook(ModelMap model)
{
System.out.println("这里是Controller");
List<Book> bookList= bookService.findListBook();
model.put("bookList",bookList);
return "list";
}
//添加学生
@RequestMapping("AddBook")
public String AddBook(Book book)
{
bookService.addBook(book);
return "redirect:/QueryListBook"; //添加成功 重定向到查询页面
}
}
那么后台实现就先到这里，下面来配置文件。
配置文件
**先来看Dao层数据源方面的配置 **
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xmlns:tx="http://www.springframework.org/schema/tx"
xmlns:context="http://www.springframework.org/schema/context"
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
http://www.springframework.org/schema/mvc
http://www.springframework.org/schema/mvc/spring-mvc.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context.xsd
http://www.springframework.org/schema/tx
http://www.springframework.org/schema/tx/spring-tx.xsd
">
<context:property-placeholder location="classpath:database.properties"/>
<!--开启注解支持-->
<mvc:annotation-driven></mvc:annotation-driven>
<!--扫描dao层的包-->
<context:component-scan base-package="com.it.dao">
</context:component-scan>
<!--配置数据源-->
<bean id="datadource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
<property name="driverClass" value="${jdbc.driver}"/>
<property name="jdbcUrl" value="${jdbc.url}"></property>
<property name="user" value="${jdbc.username}" ></property>
<property name="password" value="${jdbc.password}"></property>
</bean>
<!--配置工厂-->
<bean id="sqlSessionFactoryBean" class="org.mybatis.spring.SqlSessionFactoryBean" >
<property name="dataSource" ref="datadource"/>
<property name="typeAliasesPackage" value="com.it.entity" />
</bean>
<!--Dao接口的扫描包-->
<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer" >
<property name="sqlSessionFactoryBeanName" value="sqlSessionFactoryBean" ></property>
<property name="basePackage" value="com.it.dao"></property>
</bean>
</beans>
Service层的配置文件
这里就很简单 对service业务层添加注解的支持 包的扫描 和事务的注解
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xmlns:tx="http://www.springframework.org/schema/tx"
xmlns:context="http://www.springframework.org/schema/context"
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
http://www.springframework.org/schema/mvc
http://www.springframework.org/schema/mvc/spring-mvc.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context.xsd
http://www.springframework.org/schema/tx
http://www.springframework.org/schema/tx/spring-tx.xsd
">
<!--开启注解支持-->
<mvc:annotation-driven></mvc:annotation-driven>
<context:component-scan base-package="com.it.service"/>
<!--增加事务-->
<!--这里需要用到datasource数据源 但是数据源配置在spring-dao的xml里 所以我们需要引入-->
<!--引入spring -dao的xml-->
<import resource="classpath:spring-dao.xml"></import>
<bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
<property name="dataSource" ref="datadource"></property>
</bean>
</beans>
Spring MVC层的配置
还有一个application.xml的配置文件就不放出来了，
那我我做的事情就是 引入刚才的所有的配置就OK了，然 后在容器在应用启动时就加载并初始化这个servlet
加载这个文件就行了，那么看下web.xml
<!DOCTYPE web-app PUBLIC
"-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"
"http://java.sun.com/dtd/web-app_2_3.dtd" >
<web-app>
<display-name>Archetype Created Web Application</display-name>
<!--配置字符编码过滤器-->
<filter>
<filter-name>charecter</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>charecter</filter-name>
<url-pattern>/*