SSM创建配置测试超级无敌详细版本
1.创建
2.配置tomcat
3.创建webapp
step01,war包
step02
创建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">
</web-app>
4.构建SpringMVC
导入jar包
<!--springMVC-->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<version>5.3.23</version>
</dependency>
<!--servlet-->
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>javax.servlet-api</artifactId>
<version>4.0.1</version>
<scope>provided</scope>
</dependency>
web.xml配置DispacheServlet,核心拦截器
<?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">
<!--配置DispacheServlet,核心拦截器-->
<servlet>
<servlet-name>springmvc</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<!-- 切换目录并改名 -->
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:springmvc.xml</param-value>
</init-param>
</servlet>
<servlet-mapping>
<servlet-name>springmvc</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
</web-app>
springmvc.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:p="http://www.springframework.org/schema/p"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:util="http://www.springframework.org/schema/util"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xmlns:tx="http://www.springframework.org/schema/tx"
xmlns:aop="http://www.springframework.org/schema/aop"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-4.0.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-4.0.xsd
http://www.springframework.org/schema/util
http://www.springframework.org/schema/util/spring-util-4.0.xsd
http://www.springframework.org/schema/mvc
http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd
http://www.springframework.org/schema/tx
http://www.springframework.org/schema/tx/spring-tx-4.0.xsd
http://www.springframework.org/schema/aop
http://www.springframework.org/schema/aop/spring-aop-4.0.xsd
">
<!--扫描Controller所在包,但是注意包下的类必须有@Controller或者@RestController-->
<context:component-scan base-package="com.einmeer.controller"></context:component-scan>
</beans>
5.SpringIOC
创建配置文件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"
xmlns:p="http://www.springframework.org/schema/p"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:util="http://www.springframework.org/schema/util"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xmlns:tx="http://www.springframework.org/schema/tx"
xmlns:aop="http://www.springframework.org/schema/aop"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-4.0.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-4.0.xsd
http://www.springframework.org/schema/util
http://www.springframework.org/schema/util/spring-util-4.0.xsd
http://www.springframework.org/schema/mvc
http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd
http://www.springframework.org/schema/tx
http://www.springframework.org/schema/tx/spring-tx-4.0.xsd
http://www.springframework.org/schema/aop
http://www.springframework.org/schema/aop/spring-aop-4.0.xsd
">
</beans>
配置监听器,该监听器的作用是在服务器启动的时候读ioc配置文件
继续在web.xml中添加
<!--为监听器配置参数,目的是为了告诉监听器,要读的文件在哪-->
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:applicationcontext.xml</param-value>
</context-param>
<!--配置监听器读applicationcontext.xml-->
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
6.MyBatis
导入jar包
<!--MyBatis-->
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis</artifactId>
<version>3.5.6</version>
</dependency>
<!--mysql-->
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>8.0.28</version>
</dependency>
<!--MyBatis Spring-->
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis-spring</artifactId>
<version>2.0.6</version>
</dependency>
<!--orm关系映射-->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-orm</artifactId>
<version>5.3.23</version>
</dependency>
<!--Druid连接池-->
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>druid</artifactId>
<version>1.2.8</version>
</dependency>
在MyConfig中创建3个bean,加入IOC
applicationcontext.xml
<!--扫描配置类所在的包-->
<context:component-scan base-package="com.einmeer.config"></context:component-scan>
MyConfig
package com.einmeer.config;
import com.alibaba.druid.pool.DruidDataSource;
import org.mybatis.spring.SqlSessionFactoryBean;
import org.mybatis.spring.mapper.MapperScannerConfigurer;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import javax.sql.DataSource;
/**
* @author 芊嵛
* @date 2024/3/4
*/
@Configuration
public class MyConfig {
/**
* 配置连接池
* @return
*/
@Bean
DataSource getDataSource(){
DruidDataSource dataSource = new DruidDataSource();
dataSource.setDriverClassName("com.mysql.cj.jdbc.Driver");
dataSource.setUrl("jdbc:mysql://192.168.21.130:3306/test?useUnicode=true&characterEncoding=utf8");
dataSource.setUsername("root");
dataSource.setPassword("2459689935");;
dataSource.setMinIdle(8);
dataSource.setMaxActive(20);
return dataSource;
}
@Bean
SqlSessionFactoryBean getSqlSessionFactory(){
SqlSessionFactoryBean bean = new SqlSessionFactoryBean();
bean.setDataSource(getDataSource());
bean.setTypeAliasesPackage("com.einmeer.entity");
return bean;
}
@Bean
MapperScannerConfigurer getMapperScanner(){
MapperScannerConfigurer bean = new MapperScannerConfigurer();
bean.setBasePackage("com.einmeer.mapper");
return bean;
}
}
mapper.xml固定的头
<?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="换成上面接口的路径">
</mapper>
7.简化entity
下载lombok插件
导入jar
<!--lombok-->
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<version>1.18.24</version>
<scope>provided</scope>
</dependency>
8.截至到目前的配置整合
8.1MyConfig.java
package com.einmeer.config;
import com.alibaba.druid.pool.DruidDataSource;
import org.mybatis.spring.SqlSessionFactoryBean;
import org.mybatis.spring.mapper.MapperScannerConfigurer;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import javax.sql.DataSource;
/**
* @author 芊嵛
* @date 2024/3/4
*/
@Configuration
public class MyConfig {
/**
* 配置连接池
*
* @return
*/
@Bean
DataSource getDataSource() {
DruidDataSource dataSource = new DruidDataSource();
dataSource.setDriverClassName("com.mysql.cj.jdbc.Driver");
dataSource.setUrl("jdbc:mysql://192.168.21.130:3306/test?useUnicode=true&characterEncoding=utf8");
dataSource.setUsername("root");
dataSource.setPassword("2459689935");
;
dataSource.setMinIdle(8);
dataSource.setMaxActive(20);
return dataSource;
}
@Bean
SqlSessionFactoryBean getSqlSessionFactory() {
SqlSessionFactoryBean bean = new SqlSessionFactoryBean();
bean.setDataSource(getDataSource());
// 包别名,不写的话,mapper中返回值类型要写全
bean.setTypeAliasesPackage("com.einmeer.entity");
return bean;
}
@Bean
MapperScannerConfigurer getMapperScanner() {
MapperScannerConfigurer bean = new MapperScannerConfigurer();
// mapper别名
bean.setBasePackage("com.einmeer.mapper");
return bean;
}
}
8.2applicationcontext.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:p="http://www.springframework.org/schema/p"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:util="http://www.springframework.org/schema/util"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xmlns:tx="http://www.springframework.org/schema/tx"
xmlns:aop="http://www.springframework.org/schema/aop"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-4.0.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-4.0.xsd
http://www.springframework.org/schema/util
http://www.springframework.org/schema/util/spring-util-4.0.xsd
http://www.springframework.org/schema/mvc
http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd
http://www.springframework.org/schema/tx
http://www.springframework.org/schema/tx/spring-tx-4.0.xsd
http://www.springframework.org/schema/aop
http://www.springframework.org/schema/aop/spring-aop-4.0.xsd
">
<!--扫描配置类所在的包-->
<context:component-scan base-package="com.einmeer.config"></context:component-scan>
</beans>
8.3springmvc.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:p="http://www.springframework.org/schema/p"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:util="http://www.springframework.org/schema/util"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xmlns:tx="http://www.springframework.org/schema/tx"
xmlns:aop="http://www.springframework.org/schema/aop"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-4.0.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-4.0.xsd
http://www.springframework.org/schema/util
http://www.springframework.org/schema/util/spring-util-4.0.xsd
http://www.springframework.org/schema/mvc
http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd
http://www.springframework.org/schema/tx
http://www.springframework.org/schema/tx/spring-tx-4.0.xsd
http://www.springframework.org/schema/aop
http://www.springframework.org/schema/aop/spring-aop-4.0.xsd
">
<!--扫描Controller所在包,但是注意包下的类必须有@Controller或者@RestController-->
<context:component-scan base-package="com.einmeer.controller"></context:component-scan>
</beans>
8.4web.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">
<!--配置DispacheServlet,核心拦截器-->
<servlet>
<servlet-name>springmvc</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:springmvc.xml</param-value>
</init-param>
</servlet>
<servlet-mapping>
<servlet-name>springmvc</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
<!--为监听器配置参数,目的是为了告诉监听器,要读的文件在哪-->
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:applicationcontext.xml</param-value>
</context-param>
<!--配置监听器读applicationcontext.xml-->
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
</web-app>
9.测试
9.1Business.java
package com.einmeer.entity;
import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;
import java.math.BigDecimal;
/**
* @author 芊嵛
* @date 2024/3/4
*/
@Data // get/set方法
@AllArgsConstructor // 有参(全参)
@NoArgsConstructor // 无参
public class Business {
private Integer businessId;
private String businessName;
private String businessAddress;
private String businessExplain;
private String businessImg;
private Integer orderTypeId;
private BigDecimal startPrice;
private BigDecimal deliveryPrice;
private String remarks;
}
9.2BusinessMapper.java
package com.einmeer.mapper;
import com.einmeer.entity.Business;
import java.util.List;
/**
* @author 芊嵛
* @date 2024/3/4
*/
public interface BusinessMapper {
// 查询所有信息
List<Business> list();
}
9.3BusinessMapper.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">
<!-- 全路径 -->
<mapper namespace="com.einmeer.mapper.BusinessMapper">
<!--id代表上面Business接口中的方法名字,必须完全一致;后面的是返回值类型,由于MyConfig文件中配置了因此不用写全路径,写名字就行,不如就得向上面那样从com开始-->
<select id="list" resultType="Business">
select businessId,
businessName,
businessAddress,
businessExplain,
businessImg,
orderTypeId,
startPrice,
deliveryPrice,
remarks
from business;
</select>
</mapper>
9.4BusinessController
package com.einmeer.controller;
import com.einmeer.entity.Business;
import com.einmeer.mapper.BusinessMapper;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import javax.annotation.Resource;
import java.util.List;
/**
* @author 芊嵛
* @date 2024/3/4
*/
//返回字符串
@RestController
// 多一层路径
@RequestMapping("/business")
public class BusinessController {
// 自动new,只限一次
@Resource
BusinessMapper businessMapper;
// 调用方法的路径
@GetMapping("/list")
String list() {
System.out.println(businessMapper.list());
return "index";
}
}
10.输出到页面上
截至目前能打印到控制台,要想出入到页面上需要继续配置
导入jar,转换成JSON字符串
<!--fastjson-->
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>fastjson</artifactId>
<version>2.0.32</version>
</dependency>
springmvc.xml配置消息转换器与跨域
<!--配置消息转换器-->
<mvc:annotation-driven>
<mvc:message-converters>
<bean class="com.alibaba.fastjson.support.spring.FastJsonHttpMessageConverter">
<property name="supportedMediaTypes">
<value>application/json;charset-utf-8</value>
</property>
</bean>
</mvc:message-converters>
</mvc:annotation-driven>
<!--配置跨域-->
<mvc:cors>
<mvc:mapping path="/**" allowed-origins="*"/>
</mvc:cors>
BusinessController.java修改一下
package com.einmeer.controller;
import com.einmeer.entity.Business;
import com.einmeer.mapper.BusinessMapper;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import javax.annotation.Resource;
import java.util.List;
/**
* @author 芊嵛
* @date 2024/3/4
*/
//返回字符串
@RestController
// 多一层路径
@RequestMapping("/business")
public class BusinessController {
// 自动new,只限一次
@Resource
BusinessMapper businessMapper;
// 调用方法的路径
@GetMapping("/list")
List<Business> list() {
return businessMapper.list();
}
}
11.把sql语句输出到控制窗口
导包
<!--输出sql到控制窗口-->
<dependency>
<groupId>org.duracloud</groupId>
<artifactId>common</artifactId>
<version>7.0.0</version>
</dependency>
12.一次性插入多条数据
<!--添加-->
<!--collection如果是数组array,要是集合list item自定义 以,分割-->
<insert id="businessAdd" parameterType="Business">
INSERT INTO business ( businessName, businessAddress, businessExplain, businessImg, orderTypeId, startPrice,
deliveryPrice, remarks )
VALUES
<foreach collection="list" item="abusiness" separator=",">
(#{abusiness.businessName},
#{abusiness.businessAddress},
#{abusiness.businessExplain},
#{abusiness.businessImg},
#{abusiness.orderTypeId},
#{abusiness.startPrice},
#{abusiness.deliveryPrice},
#{abusiness.remarks}
)
</foreach>;
</insert>
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