一、配置Spring所需依赖
pom.xml项目中添加如下依赖
<?xml version="1.0" encoding="UTF-8"?> <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"> <modelVersion>4.0.0</modelVersion> <groupId>org.spring</groupId> <artifactId>SpringAPITest</artifactId> <version>1.0-SNAPSHOT</version> <packaging>war</packaging> <name>SpringAPITest Maven Webapp</name> <!-- FIXME change it to the project's website --> <url>http://www.example.com</url> <properties> <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding> <spring.version>4.3.25.RELEASE</spring.version> <mybatis.version>3.5.0</mybatis.version> </properties> <dependencies> <dependency> <groupId>junit</groupId> <artifactId>junit</artifactId> <version>4.11</version> <scope>test</scope> </dependency> <!-- 核心包 --> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-core</artifactId> <version>${spring.version}</version> </dependency> <!-- bean管理所需要的jar包 --> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-beans</artifactId> <version>${spring.version}</version> </dependency> <!-- 上下文支持jar包 --> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-context</artifactId> <version>${spring.version}</version> </dependency> <!-- 数据库访问层需要的jar包 --> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-jdbc</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-tx</artifactId> <version>${spring.version}</version> </dependency> <!-- spring 提供的测试插件 --> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-test</artifactId> <version>${spring.version}</version> </dependency> <!-- 网络支持jar包,可以使用Spring框架的支持开发Servlet代码. --> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-web</artifactId> <version>${spring.version}</version> </dependency> <!-- spring mvc所需包 --> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-webmvc</artifactId> <version>${spring.version}</version> </dependency> <!-- mybatis所需包 --> <dependency> <groupId>org.mybatis</groupId> <artifactId>mybatis</artifactId> <version>${mybatis.version}</version> </dependency> <!-- Mybatis和Spring关联包 --> <dependency> <groupId>org.mybatis</groupId> <artifactId>mybatis-spring</artifactId> <version>1.3.1</version> </dependency> <!-- 数据库连接 --> <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> <version>8.0.19</version> <scope>runtime</scope> </dependency> <!-- 数据库连接池 --> <dependency> <groupId>com.mchange</groupId> <artifactId>c3p0</artifactId> <version>0.9.5.2</version> </dependency> </dependencies> <build> <plugins> <plugin> <groupId>org.apache.maven.plugins</groupId> <artifactId>maven-compiler-plugin</artifactId> <version>3.8.0</version> <configuration> <!-- 指定source和target的版本 --> <source>1.8</source> <target>1.8</target> </configuration> </plugin> </plugins> </build> </project>
点击此处查看pom.xml文件
添加完依赖之后就是配置web.xml文件，使其关联起来我们的applicationContext.xml和Spring-mvc.xml配置
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" id="WebApp_ID" version="3.0"> <display-name>Archetype Created Web Application</display-name> <!-- 配置applicationContext --> <context-param> <param-name>contextConfigLocation</param-name> <param-value>classpath:applicationContext.xml</param-value> </context-param> <!-- 启动spring的容器 --> <listener> <listener-class> org.springframework.web.context.ContextLoaderListener </listener-class> </listener> <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> <servlet> <servlet-name>SpringMVC</servlet-name> <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class> <!-- 配置springMVC需要加载的配置文件--> <init-param> <param-name>contextConfigLocation</param-name> <param-value>classpath:spring-*.xml</param-value> </init-param> <load-on-startup>1</load-on-startup> <async-supported>true</async-supported> </servlet> <servlet-mapping> <servlet-name>SpringMVC</servlet-name> <!-- 匹配所有请求 --> <url-pattern>/</url-pattern> </servlet-mapping> </web-app>
点击此处查看web.xml文件
二、创建相关类
然后就是在项目中创建几个包类，大致结构如下
在pojo中创建一个User类
package org.spring.apitest.pojo;
public class User {
int id;
String username;
String password;
String address;
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getUsername() {
return username;
}
public void setUsername(String username) {
this.username = username;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
public String getAddress() {
return address;
}
public void setAddress(String address) {
this.address = address;
}
}
User类
再到dao里面
package org.spring.apitest.dao; import org.spring.apitest.pojo.User; public interface UserDao { User findUserById(int id); }
和service里建立对应类
package org.spring.apitest.service; import org.spring.apitest.pojo.User; public interface UserService { public User findUserById(int id); }
以及新建一个Impl接口实现类
package org.spring.apitest.service.impl; import org.spring.apitest.dao.UserDao; import org.spring.apitest.pojo.User; import org.spring.apitest.service.UserService; import org.springframework.beans.factory.annotation.Autowired; public class UserServiceImpl implements UserService { @Autowired UserDao userDao; @Override public User findUserById(int id) { return userDao.findUserById(id); } }
建立完成之后就可以配置数据库相关了
jdbc.driver=com.mysql.cj.jdbc.Driver #数据库地址 jdbc.url=jdbc:mysql://localhost:3306/ssm?useUnicode=true&characterEncoding=utf8&useSSL=false&serverTimezone=UTC&allowPublicKeyRetrieval=true #用户名 jdbc.username=root #密码 jdbc.password=root #最大连接数 c3p0.maxPoolSize=30 #最小连接数 c3p0.minPoolSize=10 #关闭连接后不自动commit c3p0.autoCommitOnClose=false #获取连接超时时间 c3p0.checkoutTimeout=10000 #当获取连接失败重试次数 c3p0.acquireRetryAttempts=2
jdbc.properties
以及Mapping的配置文件
<?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="org.spring.apitest.dao.UserDao"> <select id="selectUserByUname" resultType="org.spring.apitest.pojo.User" parameterType="java.lang.String"> select * from user where id = #{uname} </select> </mapper>
Mapping文件
最后就是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" xmlns:tx="http://www.springframework.org/schema/tx" 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/tx http://www.springframework.org/schema/tx/spring-tx.xsd"> <!-- 扫描apitest包下所有使用注解的类型 --> <context:component-scan base-package="org.spring.apitest"/> <!-- 配置数据库相关参数properties的属性：${url} --> <context:property-placeholder location="classpath:jdbc.properties"/> <!-- 数据库连接池 --> <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}"/> <property name="maxPoolSize" value="${c3p0.maxPoolSize}"/> <property name="minPoolSize" value="${c3p0.minPoolSize}"/> <property name="autoCommitOnClose" value="${c3p0.autoCommitOnClose}"/> <property name="checkoutTimeout" value="${c3p0.checkoutTimeout}"/> <property name="acquireRetryAttempts" value="${c3p0.acquireRetryAttempts}"/> </bean> <!-- 配置SqlSessionFactory对象 --> <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean"> <!-- 注入数据库连接池 --> <property name="dataSource" ref="dataSource"/> <!-- 扫描entity包 使用别名 --> <property name="typeAliasesPackage" value="org.spring.apitest.pojo"/> <!-- 扫描sql配置文件:mapper需要的xml文件 --> <property name="mapperLocations" value="classpath:Mapping/*.xml"/> </bean> <!-- 配置扫描Dao接口包，动态实现Dao接口，注入到spring容器中 --> <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer"> <!-- 注入sqlSessionFactory --> <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"/> <!-- 给出需要扫描Dao接口包 --> <property name="basePackage" value="org.spring.apitest.dao"/> </bean> <!-- 配置事务管理器 --> <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager"> <!-- 注入数据库连接池 --> <property name="dataSource" ref="dataSource"/> </bean> <!-- 配置基于注解的声明式事务 --> <tx:annotation-driven transaction-manager="transactionManager"/> </beans>
和Sprin-mvc.xml文件了
<?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:mvc="http://www.springframework.org/schema/mvc" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.1.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.1.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.3.xsd"> <!-- 配置springMVC --> <!-- 1.开启springMVC注解模式 --> <!--DispatcherServlet启用基于annotation的HandlerMapping --> <!-- a.自动注册DefaultAnnotationHandlerMapping,AnnotationMethodHandlerAdapter b.默认提供一系列的功能:数据绑定，数字和日期的[email protected],@DateTimeFormat c:xml,json的默认读写支持 --> <mvc:annotation-driven /> <!--2.静态资源默认servlet配置--> <!--1).加入对静态资源处理：js,gif,png 2).允许使用 "/" 做整体映射 --> <mvc:default-servlet-handler/> <!-- 定义视图文件解析 --> <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver"> <property name="prefix" value="/WEB-INF/view/" /> <property name="suffix" value=".jsp" /> </bean> <!-- 自动扫描该包，使SpringMVC认为包下用了@controller注解的类是控制器 --> <context:component-scan base-package="org.spring.apitest.controller"/> </beans>
之后创建Controller处理器
package org.spring.apitest.controller; import org.spring.apitest.dao.UserDao; import org.spring.apitest.pojo.User; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Controller; import org.springframework.ui.Model; import org.springframework.web.bind.annotation.RequestMapping; @Controller public class HttpTestController { @Autowired UserDao userDao; @RequestMapping("/select") public String select(int id, Model model) { User list = userDao.findUserById(id); model.addAttribute("userInfo", list); return "user"; } }
Controller处理器代码
以及视图层的user.jsp文件
<%-- Created by IntelliJ IDEA. User: peco Date: 2021/3/1 Time: 14:00 To change this template use File | Settings | File Templates. --%> <%@ page contentType="text/html;charset=UTF-8" language="java" %> <%@taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core"%> <html> <head> <title>Title</title> </head> <body> 用户信息 <br> ${userInfo.id } ${userInfo.username } ${userInfo.password } ${userInfo.address } <br> </body> </html>
JSP代码
最终架构如下图所示：
文章来源: https://www.cnblogs.com/wh4am1/p/14463543.html
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