ssm-maven-web结构的基础整合
导入依赖
<properties>
<spring_version>5.2.4.RELEASE</spring_version>
<jstl_version>1.2</jstl_version>
</properties>
<dependencies>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>3.8.1</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context</artifactId>
<version>${spring_version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<version>${spring_version}</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.springframework/spring-core -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-core</artifactId>
<version>${spring_version}</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.springframework/spring-beans -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-beans</artifactId>
<version>${spring_version}</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.springframework/spring-web -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-web</artifactId>
<version>${spring_version}</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.springframework/spring-aop -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-aop</artifactId>
<version>${spring_version}</version>
</dependency>
<!-- https://mvnrepository.com/artifact/javax.servlet.jsp.jstl/jstl-api -->
<dependency>
<groupId>javax.servlet.jsp.jstl</groupId>
<artifactId>jstl-api</artifactId>
<version>${jstl_version}</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.glassfish.web/jstl-impl -->
<dependency>
<groupId>org.glassfish.web</groupId>
<artifactId>jstl-impl</artifactId>
<version>${jstl_version}</version>
</dependency>
<dependency>
<groupId>jstl</groupId>
<artifactId>jstl</artifactId>
<version>1.2</version>
</dependency>
<!-- https://mvnrepository.com/artifact/mysql/mysql-connector-java -->
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>8.0.19</version>
</dependency>
<!-- https://mvnrepository.com/artifact/com.alibaba/druid -->
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>druid</artifactId>
<version>1.1.21</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.springframework/spring-jdbc -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-jdbc</artifactId>
<version>${spring_version}</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.mybatis/mybatis -->
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis</artifactId>
<version>3.5.4</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.mybatis/mybatis-spring -->
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis-spring</artifactId>
<version>2.0.3</version>
</dependency>
</dependencies>
配置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">
<!-- 启动spring容器 -->
<!-- needed for ContextLoaderListener -->
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:applicationContext.xml</param-value>
</context-param>
<!-- Bootstraps the root web application context before servlet initialization -->
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
<!-- 启动springmvc的前端控制器 ,拦截所有请求 -->
<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:spring-mvc.xml</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>
<!-- Map all requests to the DispatcherServlet for handling -->
<servlet-mapping>
<servlet-name>springmvc</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
<!-- 编码过滤器 -->
<!-- <filter>-->
<!-- <filter-name>CharacterEncodingFilter</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>-->
<!-- <init-param>-->
<!-- <param-name>forceRequestEncoding</param-name>-->
<!-- <param-value>true</param-value>-->
<!-- </init-param>-->
<!-- <init-param>-->
<!-- <param-name>forceResponseEncoding</param-name>-->
<!-- <param-value>true</param-value>-->
<!-- </init-param>-->
<!-- </filter>-->
<!-- <filter-mapping>-->
<!-- <filter-name>CharacterEncodingFilter</filter-name>-->
<!-- <url-pattern>/</url-pattern>-->
<!-- </filter-mapping>-->
<!-- 使用Rest风格的URL -->
<!-- <filter>-->
<!-- <filter-name>HiddenHttpMethodFilter</filter-name>-->
<!-- <filter-class>org.springframework.web.filter.HiddenHttpMethodFilter</filter-class>-->
<!-- </filter>-->
<!-- <filter-mapping>-->
<!-- <filter-name>HiddenHttpMethodFilter</filter-name>-->
<!-- <url-pattern>/</url-pattern>-->
<!-- </filter-mapping>-->
</web-app>
创建applicationContext和spring-mvc配置文件
创建jdbc属性文件
写入基本属性:
jdbc.driverClassName=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql://localhost:3306/mydb?serverTimezone=UTC
jdbc.username=root
jdbc.password=
配置applicationContext.xml文件
<?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">
<context:component-scan base-package="com.yyf"/>
<!--数据库属性文件-->
<context:property-placeholder location="classpath:jdbc.properties" ignore-unresolvable="true"/>
<!--配置数据源-->
<bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource" init-method="init" destroy-method="close">
<property name="driverClassName" value="${jdbc.driverClassName}"/>
<property name="url" value="${jdbc.url}"/>
<property name="username" value="${jdbc.username}"/>
<property name="password" value="${jdbc.password}"/>
</bean>
<!-- 配置sqlSessionFactory -->
<bean id="sqlsessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
<!-- 注入数据库连接词 -->
<property name="dataSource" ref="dataSource"/>
<!--配置映射文件路径-->
<property name="mapperLocations" value="classpath:mapper/*.xml"/>
<!--配置别名包-->
<property name="typeAliasesPackage" value="com.yyf.enity"/>
</bean>
<!--sqlSession配置-->
<bean id="sqlSession" class="org.mybatis.spring.SqlSessionTemplate">
<!--配置构造函数参数,及对应位置-->
<constructor-arg index="0" ref="sqlsessionFactory"/>
</bean>
<bean id="mapperScannerConfigurer" class="org.mybatis.spring.mapper.MapperScannerConfigurer">
<property name="sqlSessionFactoryBeanName" value="sqlsessionFactory"/>
<property name="basePackage" value="com.yyf.mapper"/>
</bean>
</beans>
配置spring-mvc文件
<?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 https://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/mvc https://www.springframework.org/schema/mvc/spring-mvc.xsd">
<!-- 配置控制器-->
<context:component-scan base-package="com.yyf.controller"/>
<mvc:annotation-driven/>
<!--视图解析器-->
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="viewClass" value="org.springframework.web.servlet.view.JstlView"/>
<property name="prefix" value="/WEB-INF/views/"/>
<property name="suffix" value=".jsp"/>
</bean>
</beans>
配置完成,开始测试::创建如图包结构
mapper目录下直接创建mapper模板(如何配置请看:https://blog.csdn.net/qq_41906510/article/details/105621228)
UserMapper:
package com.yyf.mapper;
import com.yyf.enity.User;
import org.springframework.stereotype.Repository;
import java.util.List;
@Repository
public interface UserMapper {
public List<User> findAll();
}
userMapper.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.yyf.mapper.UserMapper">
<select id="findAll" resultType="user">
select * from user_table
</select>
</mapper>
实体类User,请与自己的数据库对应
package com.yyf.enity;
import org.springframework.stereotype.Component;
@Component
public class User {
private long id;
private String ming;
private String password;
private String age;
private String sex;
private String hobby;
@Override
public String toString() {
return "User{" +
"id=" + id +
", ming='" + ming + '\'' +
", password='" + password + '\'' +
", age='" + age + '\'' +
", sex='" + sex + '\'' +
", hobby='" + hobby + '\'' +
'}';
}
}
UserService及UserServiceImpl
package com.yyf.service;
import com.yyf.enity.User;
import java.util.List;
public interface UserService {
public List<User> findAll();
}
package com.yyf.service.impl;
import com.yyf.enity.User;
import com.yyf.mapper.UserMapper;
import com.yyf.service.UserService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import java.util.List;
@Service
public class UserServiceImpl implements UserService {
@Autowired
private UserMapper userMapper;
public List<User> findAll() {
return userMapper.findAll();
}
}
HelloController
在package com.yyf.controller;
import com.yyf.service.UserService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import javax.annotation.Resource;
@Controller
@RequestMapping
public class HelloController {
@Resource
private UserService userService;
@GetMapping("test")
public void test(){
System.out.println("开始");
System.out.println(userService.findAll());
}
}