在idea中使用gradle搭建ssm项目

在 idea 新版本的创建项目中,无法自己选择创建项目是普通 java 工程还是 web 工程了【IDEA 旧版本是可以的】，所以我们如果想创建 web 工程，只需要自己在 src/main/目录下添加 webapp/WEB-INF/web.xml 及页面即可

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配置tomcat

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运行结果如上

代码

build.gradle

plugins {
    id 'java'
    id 'war'
}

group = 'top.qaqaq.groovy'
version = '1.0-SNAPSHOT'

repositories {
    mavenCentral()
}

dependencies {
    implementation 'org.springframework:spring-beans:4.1.7.RELEASE'
    implementation 'org.springframework:spring-web:4.1.7.RELEASE'
    implementation 'org.springframework:spring-webmvc:4.1.7.RELEASE'
    implementation 'org.springframework:spring-tx:4.1.7.RELEASE'
    implementation 'org.springframework:spring-test:4.0.5.RELEASE'
    implementation 'org.springframework:spring-jdbc:4.1.7.RELEASE'

    implementation 'org.mybatis:mybatis-spring:1.2.3'
    implementation 'org.mybatis:mybatis:3.3.0'

//    implementation 'mysql:mysql-connector-java:5.1.36'
    implementation 'mysql:mysql-connector-java:8.0.28' //版本改为8.0
    implementation 'com.alibaba:druid:1.0.15'

    implementation "com.fasterxml.jackson.core:jackson-databind:2.2.3"
    implementation "com.fasterxml.jackson.core:jackson-annotations:2.2.3"
    implementation "com.fasterxml.jackson.core:jackson-core:2.2.3"

    implementation 'org.aspectj:aspectjweaver:1.8.6'
    implementation 'log4j:log4j:1.2.17'
    implementation 'org.slf4j:slf4j-api:1.7.25'
    implementation 'jstl:jstl:1.2'
    compileOnly 'javax.servlet:servlet-api:2.5'
    testImplementation group: 'junit' ,name: 'junit', version: '4.12'
}

wepapp/WEB-INF/web.xml

<?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.4"
         xmlns="http://java.sun.com/xml/ns/j2ee"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee
        http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd">

    <context-param>
        <!-- 指定spring 配置文件的路径和名称 -->
        <param-name>contextConfigLocation</param-name>
        <param-value>classpath:applicationContext.xml</param-value>
    </context-param>

    <!-- 指定spring的监听器 -->
    <listener>
        <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
    </listener>

    <!-- 2.配置springmvc的前端控制器 -->
    <servlet>
        <servlet-name>DispatcherServlet</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>DispatcherServlet</servlet-name>
        <url-pattern>/</url-pattern>
    </servlet-mapping>

    <!-- 2.处理POST请求乱码的过滤器 -->
    <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>
    </filter>

    <filter-mapping>
        <filter-name>CharacterEncodingFilter</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping>

    <!-- 3.配置将POST请求转换为PUT或者DELETE请求的过滤器 -->
    <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>

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: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">

      <!-- 1.配置扫描包 -->
    <context:component-scan base-package="top.qaqaq" use-default-filters="false">
         <context:include-filter type="annotation" expression="org.springframework.stereotype.Controller"/>
         <context:include-filter type="annotation" expression="org.springframework.web.bind.annotation.ControllerAdvice"/>
    </context:component-scan>

     <!-- 2.配置内部资源视图解析器-->
    <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name="prefix" value="/WEB-INF/"/>
        <property name="suffix" value=".jsp"/>
    </bean>
    <!--3.处理静态资源文件 -->
    <mvc:default-servlet-handler/>
    <mvc:annotation-driven/>
</beans>

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: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 https://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd">


    <!-- 0.配置扫描包 -->
    <context:component-scan base-package="top.qaqaq">
        <context:exclude-filter type="annotation" expression="org.springframework.stereotype.Controller"/>
        <context:exclude-filter type="annotation" expression="org.springframework.web.bind.annotation.ControllerAdvice"/>
    </context:component-scan>

    <!-- 1.加载properties文件 -->
    <context:property-placeholder location="classpath:jdbc.properties"></context:property-placeholder>


    <!-- 2.配置数据源 -->
    <bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource">
        <property name="username" value="${jdbc.userName}"></property>
        <property name="password" value="${jdbc.password}"></property>
        <property name="url" value="${jdbc.jdbcUrl}"></property>
        <property name="driverClassName" value="${jdbc.driverClass}"></property>
    </bean>

    <!-- 4.配置数据源事务管理器 -->
    <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
        <property name="dataSource" ref="dataSource"></property>
    </bean>

    <tx:annotation-driven transaction-manager="transactionManager"></tx:annotation-driven>


    <!-- 1.配置spring整合mybatis -->
    <bean class="org.mybatis.spring.SqlSessionFactoryBean">
        <property name="dataSource" ref="dataSource"></property>
        <property name="configLocation" value="classpath:mybatis-config.xml"></property>
    </bean>

    <!-- 2.配置扫描mapper接口的bean对象 -->
    <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        <property name="basePackage" value="top.qaqaq.dao"/>
    </bean>

</beans>

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>




</configuration>

jdbc.properties

jdbc.jdbcUrl=jdbc:mysql://localhost:3306/study?serverTimezone=GMT%2B8&characterEncoding=utf-8&useSSL=false
jdbc.driverClass=com.mysql.cj.jdbc.Driver
jdbc.userName=root
jdbc.password=123456

数据库中的数据

bean.Admin.java

package top.qaqaq.bean;

public class Admin {
    private Integer id;
    private String username;
    private String email;

    public Integer getId() {
        return id;
    }

    public void setId(Integer id) {
        this.id = id;
    }

    public String getUsername() {
        return username;
    }

    public void setUsername(String username) {
        this.username = username;
    }

    public String getEmail() {
        return email;
    }

    public void setEmail(String email) {
        this.email = email;
    }

    @Override
    public String toString() {
        return "Admin{" +
                "id=" + id +
                ", username='" + username + '\'' +
                ", email='" + email + '\'' +
                '}';
    }
}

dao.AdminMapper.java

package top.qaqaq.dao;

import top.qaqaq.bean.Admin;

import java.util.List;

public interface AdminMapper {
    List<Admin> getAdminList();
}

service.AdminService.java

package top.qaqaq.service;

import top.qaqaq.bean.Admin;
import top.qaqaq.dao.AdminMapper;
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 AdminService {

    @Autowired
    private AdminMapper adminMapper;

    @Transactional
    public List<Admin> getAdminList(){
        return adminMapper.getAdminList();
    }
}

controller.AdminController.java

package top.qaqaq.controller;

import top.qaqaq.bean.Admin;
import top.qaqaq.service.AdminService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;

import java.util.List;

@Controller
@RequestMapping("/admin")
public class AdminController {

    @Autowired
    private AdminService adminService;

    @RequestMapping("/list")
    @ResponseBody
    public List<Admin> getAdminList() {
        System.out.println("dada");
        return adminService.getAdminList();
    }

}

top/qaqaq/dao/AdminMapper.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="top.qaqaq.dao.AdminMapper">

    <select id="getAdminList" resultType="top.qaqaq.bean.Admin">
        select id,username,email from t_admin
    </select>


</mapper>

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运行

代码

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