springboot整合mybatis

程序员文章站 2022-05-26 09:11:00

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直接截图:

1.新建springboot项目	2.选址jdk版本

3.测试项目命名com.zsw.two	4.选择jar,这里我准备使用lomback记录日志,可不选

5.选择项目web	6.选sql的jar包依赖:我用的是mysql

7.新建项目完成,注意:project location要有\项目名	8.建立后的项目结构

9.项目依赖: pom.xml

<?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>
	<parent>
		<groupId>org.springframework.boot</groupId>
		<artifactId>spring-boot-starter-parent</artifactId>
		<version>2.1.4.RELEASE</version>
		<relativePath/> <!-- lookup parent from repository -->
	</parent>
	<groupId>com.zsw</groupId>
	<artifactId>two</artifactId>
	<version>0.0.1-SNAPSHOT</version>
	<name>two</name>
	<description>Demo project for Spring Boot</description>

	<properties>
		<java.version>1.8</java.version>
	</properties>

	<dependencies>
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-jdbc</artifactId>
		</dependency>
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-web</artifactId>
		</dependency>
		<dependency>
			<groupId>org.mybatis.spring.boot</groupId>
			<artifactId>mybatis-spring-boot-starter</artifactId>
			<version>2.0.1</version>
		</dependency>

		<dependency>
			<groupId>mysql</groupId>
			<artifactId>mysql-connector-java</artifactId>
			<scope>runtime</scope>
		</dependency>
		<dependency>
			<groupId>org.projectlombok</groupId>
			<artifactId>lombok</artifactId>
			<optional>true</optional>
		</dependency>
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-test</artifactId>
			<scope>test</scope>
		</dependency>

		<dependency>
			<groupId>com.alibaba</groupId>
			<artifactId>druid</artifactId>
			<version>1.1.10</version>
		</dependency>

	</dependencies>

	<build>
		<plugins>
			<plugin>
				<groupId>org.springframework.boot</groupId>
				<artifactId>spring-boot-maven-plugin</artifactId>
			</plugin>
		</plugins>
	</build>

</project>

10.个人感觉application配置文件yml格式更好用,就直接把application文件改为.yml了

server:
  port: 6789

spring: 
  datasource:
    url: jdbc:mysql://localhost:3306/zulin-dev?autoReconnect=true&useUnienabledcode=true&characterEncoding=utf8&zeroDateTimeBehavior=convertToNull
    username: root
    password: root
    driver-class-name: com.mysql.cj.jdbc.Driver
    # 使用druid数据源
    type: com.alibaba.druid.pool.DruidDataSource
    filters: stat
    maxActive: 20
    initialSize: 1
    maxWait: 60000
    minIdle: 1
    timeBetweenEvictionRunsMillis: 60000
    minEvictableIdleTimeMillis: 300000
    validationQuery: select 'x'
    testWhileIdle: true
    testOnBorrow: false
    testOnReturn: false
    poolPreparedStatements: true
    maxOpenPreparedStatements: 20

11.到这里就是springboot项目的建立,写个测试类,验证springboot项目:

package com.zsw.two.vehicle.entity;

import lombok.Data;

/**
 * 车辆信息 实体类
 *
 * @author zhangshiwei
 * @since 2019年4月15日 下午3:47:45
 */
@Data
public class Vehicle {
    private Long   id;
    private String vehicleCode;
    private Long   vehicleBrandId;
    private String vehicleBrandName;
    private Long   vehicleVendorId;
    private String vehicleVendorName;
    private Long   vehicleSeriesId;
    private String vehicleSeriesName;
    private Long   vehicleTypeId;
    private String vehicleTypeName;
    private String vehicleColor;
}

package com.zsw.two.test.web;

import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;

import com.zsw.two.vehicle.entity.Vehicle;

/**
 * @author zhangshiwei
 * @since 2019年4月15日 下午11:17:15
 */
@RequestMapping("/test")
@Controller
public class TestController {
    @RequestMapping("/genVehicle/{id}")
    @ResponseBody
    public Vehicle genVehicle(@PathVariable Long id) {
        Vehicle vehicle = new Vehicle();
        vehicle.setId(id);
        vehicle.setVehicleCode("V20190415000001");
        vehicle.setVehicleBrandId(1L);
        vehicle.setVehicleBrandName("宝马");
        vehicle.setVehicleVendorId(2L);
        vehicle.setVehicleVendorName("华晨宝马");
        vehicle.setVehicleSeriesId(3L);
        vehicle.setVehicleSeriesName("5系");
        vehicle.setVehicleTypeId(4L);
        vehicle.setVehicleTypeName("2018款 528Li");
        vehicle.setVehicleColor("宝石青金属漆");
        return vehicle;
    }
}

12.开始集成mybatis: 首先application.yml新增mybatis相关配置:

mybatis:
  #xml文件的映射地址 放在resources下
  mapper-locations: classpath:mapper/*/*.xml
  configuration:
    #驼峰
    map-underscore-to-camel-case: true
  mapper-scanner:
    #mapper.java文件的jar包地址
    base-package: com.zsw.two.*.mapper
    #实体类jar包地址
    type-aliases-package: com.zsw.two.*.entity

13.新的项目层级结构:

14.VehicleMapper.java 注意:此处加注释@Repository,否则serviceImpl中注入时会报错,另外在

TwoApplication上加注释@MapperScan,如图19

package com.zsw.two.vehicle.mapper;

import org.springframework.stereotype.Repository;

import com.zsw.two.vehicle.entity.Vehicle;

/**
 * 车辆信息 mapper
 *
 * @author zhangshiwei
 * @since 2019年4月15日 下午11:41:57
 */
@Repository
public interface VehicleMapper {

    /**
     * 根据车辆主键id查询车辆信息
     *
     * @param condition 车辆id
     * @return 查询结果
     */
    Vehicle findVehicleById(Vehicle condition);

}

15.VehicleService

package com.zsw.two.vehicle.service;

import com.zsw.two.vehicle.entity.Vehicle;

/**
 * 车辆信息 服务类接口
 *
 * @author zhangshiwei
 * @since 2019年4月15日 下午11:42:27
 */
public interface VehicleService {

    /**
     * 根据车辆主键id查询车辆信息
     *
     * @param condition 车辆id
     * @return 查询结果
     */
    Vehicle findVehicleById(Vehicle condition);

}

16.VehicleServiceImpl

package com.zsw.two.vehicle.service.impl;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import com.zsw.two.vehicle.entity.Vehicle;
import com.zsw.two.vehicle.mapper.VehicleMapper;
import com.zsw.two.vehicle.service.VehicleService;

/**
 * 车辆信息 服务实现类
 *
 * @author zhangshiwei
 * @since 2019年4月15日 下午11:42:55
 */
@Service
public class VehicleServiceImpl implements VehicleService {

    @Autowired
    private VehicleMapper vehicleMapper;

    @Override
    public Vehicle findVehicleById(Vehicle condition) {
        if (condition.getId() == null) {
            return null;
        }
        return vehicleMapper.findVehicleById(condition);
    }

}

17.VehicleController

package com.zsw.two.vehicle.web;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;

import com.zsw.two.vehicle.entity.Vehicle;
import com.zsw.two.vehicle.service.VehicleService;

/**
 * 车辆信息 控制类
 *
 * @author zhangshiwei
 * @since 2019年4月15日 下午11:43:35
 */
@RequestMapping("/vehicle")
@Controller
public class VehicleController {

    @Autowired
    private VehicleService vehicleService;

    /**
     * 根据车辆主键id查询车辆信息
     *
     * @param condition 车辆id
     * @return 查询结果
     */
    @RequestMapping("/findVehicleById")
    @ResponseBody
    public Vehicle findVehicleById(@RequestBody Vehicle condition) {
        return vehicleService.findVehicleById(condition);
    }

}

18.VehicleMapper.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.zsw.two.vehicle.mapper.VehicleMapper">

	<!-- 通用查询映射结果 -->
	<resultMap id="BaseResultMap" type="com.zsw.two.vehicle.entity.Vehicle">
		<id column="id" property="id" />
		<result column="vehicle_code" property="vehicleCode" />
		<result column="vehicle_brand_id" property="vehicleBrandId" />
		<result column="vehicle_brand_name" property="vehicleBrandName" />
		<result column="vehicle_vendor_id" property="vehicleVendorId" />
		<result column="vehicle_vendor_name" property="vehicleVendorName" />
		<result column="vehicle_series_id" property="vehicleSeriesId" />
		<result column="vehicle_series_name" property="vehicleSeriesName" />
		<result column="vehicle_type_id" property="vehicleTypeId" />
		<result column="vehicle_type_name" property="vehicleTypeName" />
		<result column="vehicle_color" property="vehicleColor" />
	</resultMap>

	<sql id="Base_Column">
	    id as id,
		vehicle_code as vehicleCode,
		vehicle_brand_id as vehicleBrandId,
		vehicle_brand_name as vehicleBrandName,
		vehicle_vendor_id as vehicleVendorId,
		vehicle_vendor_name as vehicleVendorName,
		vehicle_series_id as vehicleSeriesId,
		vehicle_series_name as vehicleSeriesName,
		vehicle_type_id as vehicleTypeId,
		vehicle_type_name as vehicleTypeName,
		vehicle_color as vehicleColor
	</sql>

	<select id="findVehicleById" resultType="com.zsw.two.vehicle.entity.Vehicle"
	parameterType="com.zsw.two.vehicle.entity.Vehicle">
		SELECT
		<include refid="Base_Column"/>
		from t_vehicle t
		where
		t.is_deleted = 'N'
		<if test="id != null and id != ''">
			and t.id = #{id}
		</if>
	</select>

</mapper>

19.TwoApplication加注解@MapperScan:

package com.zsw.two;

import org.mybatis.spring.annotation.MapperScan;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

@MapperScan("com.zsw.two.*.mapper")
@SpringBootApplication
public class TwoApplication {

    public static void main(String[] args) {
        SpringApplication.run(TwoApplication.class, args);
    }

}

20.测试:

21.虽然结果对了,但是,控制台没有输出日志,application.yml增加日志输出配置,并输出日志文件:

# 记录日志文件
logging:
  config: classpath:logback.xml

22.logback.xml 注意:此配置文件的地址是resources下的log内的! 要和application.yml设置的一致!

<?xml version="1.0" encoding="UTF-8"?>
<configuration>
    <!-- %m输出的信息, %p日志级别, %t线程名, %d日期, %c类的全名, %i索引 -->
    <!-- appender是configuration的子节点,是负责写日志的组件 -->
    <!-- ConsoleAppender把日志输出到控制台 -->
    <!--    <property name="CONSOLE_LOG_PATTERN" -->
    <!--               value="%date{yyyy-MM-dd HH:mm:ss} | %highlight(%-5level) | %boldYellow(%thread) | %boldGreen(%logger) | %msg%n"/> -->
    <appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
        <encoder>
            <!--<pattern>${CONSOLE_LOG_PATTERN}</pattern> -->
            <!--<pattern>%date{yyyy-MM-dd HH:mm:ss} %highlight(%-5level) (%file:%line\)- %m%n</pattern>-->
            <!--<pattern>%d{HH:mm:ss.SSS} %contextName [%thread] %-5level %logger{360} - %msg%n</pattern>-->
            <pattern>%d [%thread] %highlight(%-5level) [%c] [%F:%L] [trace=%X{traceId}] - %msg%n</pattern>
            <!-- 控制台也要使用utf-8，不要使用gbk -->
            <charset>UTF-8</charset>
        </encoder>
    </appender>

    <!-- RollingFileAppender:滚动记录文件，先将日志记录到指定文件，当符合某个条件时，将日志记录到其他文件 -->
    <!-- 1.先按日期存日志，日期变了，将前一天的日志文件名重命名为xxx%日期%索引，新的日志仍然是sys.log -->
    <!-- 2.如果日期没有变化，但是当前日志文件的大小超过1kb时，对当前日志进行分割 重名名 -->
    <appender name="syslog" class="ch.qos.logback.core.rolling.RollingFileAppender">
        <File>mylog/sys.log</File>
        <!-- rollingPolicy:当发生滚动时，决定 RollingFileAppender 的行为，涉及文件移动和重命名。 -->
        <!-- TimeBasedRollingPolicy： 最常用的滚动策略，它根据时间来制定滚动策略，既负责滚动也负责出发滚动 -->
        <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
            <!-- 活动文件的名字会根据fileNamePattern的值，每隔一段时间改变一次 -->
            <!-- 文件名：log/sys.2017-12-05.0.log -->
            <fileNamePattern>mylog/sys.%d.%i.log</fileNamePattern>
            <!-- 每产生一个日志文件，该日志文件的保存期限为30天 -->
            <maxHistory>30</maxHistory>
            <timeBasedFileNamingAndTriggeringPolicy  class="ch.qos.logback.core.rolling.SizeAndTimeBasedFNATP">
                <!-- maxFileSize:这是活动文件的大小，默认值是10MB,本篇设置为1KB，只是为了演示 -->
                <maxFileSize>10240KB</maxFileSize>
            </timeBasedFileNamingAndTriggeringPolicy>
        </rollingPolicy>
        <encoder>
            <!-- pattern节点，用来设置日志的输入格式 -->
            <pattern>
                %d %p (%file:%line\)- %m%n
            </pattern>
            <!-- 记录日志的编码 -->
            <charset>UTF-8</charset> <!-- 此处设置字符集 -->
        </encoder>
    </appender>
    <!-- 控制台日志输出级别 -->
    <root level="INFO">
        <appender-ref ref="STDOUT" />
    </root>
    <!-- 指定项目中某个包，当有日志操作行为时的日志记录级别 -->
    <!-- com.appley为根包，也就是只要是发生在这个根包下面的所有日志操作行为的权限都是DEBUG -->
    <!-- 级别依次为【从高到低】：FATAL > ERROR > WARN > INFO > DEBUG > TRACE  -->
    <logger name="com.zsw.two" level="DEBUG">
        <appender-ref ref="syslog" />
    </logger>
</configuration>

23.为了追踪同一个线程的日志,在日志中加了tranceId,子线程会从父线程中拿取,方便查找统一线程的日志,定位问题所在!

加pom.xml依赖:

		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-aop</artifactId>
			<version>4.3.10.RELEASE</version>
		</dependency>
		<dependency>
			<groupId>org.aspectj</groupId>
			<artifactId>aspectjweaver</artifactId>
			<version>1.8.13</version>
		</dependency>

		<dependency>
			<groupId>com.alibaba</groupId>
			<artifactId>fastjson</artifactId>
			<version>1.2.37</version>
		</dependency>

24.处理日志的aop

package com.zsw.two.log;

import javax.servlet.http.HttpServletRequest;

import org.aspectj.lang.JoinPoint;
import org.aspectj.lang.annotation.AfterReturning;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Before;
import org.aspectj.lang.annotation.Pointcut;
import org.slf4j.MDC;
import org.springframework.stereotype.Component;
import org.springframework.web.context.request.RequestContextHolder;
import org.springframework.web.context.request.ServletRequestAttributes;

import com.alibaba.fastjson.JSON;
import com.fasterxml.jackson.annotation.JsonInclude;
import com.fasterxml.jackson.databind.ObjectMapper;

import lombok.extern.slf4j.Slf4j;

/**
 * 统一日志追踪处理器
 */
@Slf4j
@Component
@Aspect
public class ControllerLogAop {

    @Pointcut(value = "execution(* com.zsw.two.*.web..*.*(..))")
    public void controllerMethodPointcut() {
    }

    @Before("controllerMethodPointcut()")
    public void controllerMethodPointcutBefore(JoinPoint joinPoint) throws Exception {
        String traceId = String.valueOf(System.currentTimeMillis());
        MDC.put("traceId", traceId);

        ServletRequestAttributes attributes = (ServletRequestAttributes) RequestContextHolder.getRequestAttributes();
        HttpServletRequest request = attributes.getRequest();

        StringBuffer requestLog = new StringBuffer();
        requestLog.append("controller请求结果请求信息：")
                .append("URL = {" + request.getRequestURI() + "},\t")
                .append("HTTP_METHOD = {" + request.getMethod() + "},\t")
                .append("IP = {" + request.getRemoteAddr() + "},\t")
                .append("CLASS_METHOD = {" + joinPoint.getSignature().getDeclaringTypeName() + "."
                        + joinPoint.getSignature().getName() + "},\t");

        if (joinPoint.getArgs().length == 0) {
            requestLog.append("ARGS = {} ");
        } else {
            requestLog.append("ARGS = " + new ObjectMapper().setSerializationInclusion(JsonInclude.Include.NON_NULL)
                    .writeValueAsString(joinPoint.getArgs()[0]) + "");
        }

        log.info(requestLog.toString());
    }

    @AfterReturning(returning = "returnValue", pointcut = "controllerMethodPointcut()")
    public void logPageInfoAfterReturning(JoinPoint joinPoint, Object returnValue) {
        log.info("controller请求结果：{}", JSON.toJSON(returnValue));
    }

}

25.最终的日志打印结果:

2019-04-16 00:51:03,074 [http-nio-6789-exec-2] INFO [org.apache.catalina.core.ContainerBase.[Tomcat].[localhost].[/]] [DirectJDKLog.java:173] [trace=] - Initializing Spring DispatcherServlet 'dispatcherServlet'
2019-04-16 00:51:03,074 [http-nio-6789-exec-2] INFO [org.springframework.web.servlet.DispatcherServlet] [FrameworkServlet.java:524] [trace=] - Initializing Servlet 'dispatcherServlet'
2019-04-16 00:51:03,109 [http-nio-6789-exec-2] INFO [org.springframework.web.servlet.DispatcherServlet] [FrameworkServlet.java:546] [trace=] - Completed initialization in 35 ms
2019-04-16 00:51:03,216 [http-nio-6789-exec-2] INFO [com.zsw.two.log.ControllerLogAop] [ControllerLogAop.java:56] [trace=1555347063197] - controller请求结果请求信息：URL = {/vehicle/findVehicleById}, HTTP_METHOD = {POST}, IP = {0:0:0:0:0:0:0:1}, CLASS_METHOD = {com.zsw.two.vehicle.web.VehicleController.findVehicleById}, ARGS = {"id":3450}
2019-04-16 00:51:03,312 [http-nio-6789-exec-2] INFO [com.alibaba.druid.pool.DruidDataSource] [DruidDataSource.java:930] [trace=1555347063197] - {dataSource-1} inited
2019-04-16 00:51:03,865 [http-nio-6789-exec-2] DEBUG [com.zsw.two.vehicle.mapper.VehicleMapper.findVehicleById] [BaseJdbcLogger.java:143] [trace=1555347063197] - ==> Preparing: SELECT id as id, vehicle_code as vehicleCode, vehicle_brand_id as vehicleBrandId, vehicle_brand_name as vehicleBrandName, vehicle_vendor_id as vehicleVendorId, vehicle_vendor_name as vehicleVendorName, vehicle_series_id as vehicleSeriesId, vehicle_series_name as vehicleSeriesName, vehicle_type_id as vehicleTypeId, vehicle_type_name as vehicleTypeName, vehicle_color as vehicleColor from t_vehicle t where t.is_deleted = 'N' and t.id = ?
2019-04-16 00:51:03,885 [http-nio-6789-exec-2] DEBUG [com.zsw.two.vehicle.mapper.VehicleMapper.findVehicleById] [BaseJdbcLogger.java:143] [trace=1555347063197] - ==> Parameters: 3450(Long)
2019-04-16 00:51:03,958 [http-nio-6789-exec-2] DEBUG [com.zsw.two.vehicle.mapper.VehicleMapper.findVehicleById] [BaseJdbcLogger.java:143] [trace=1555347063197] - <== Total: 1
2019-04-16 00:51:04,031 [http-nio-6789-exec-2] INFO [com.zsw.two.log.ControllerLogAop] [ControllerLogAop.java:61] [trace=1555347063197] - controller请求结果：{"vehicleColor":"宝石青金属漆","vehicleSeriesId":162,"vehicleTypeId":3529,"vehicleVendorName":"华晨宝马","vehicleVendorId":20,"vehicleBrandId":7,"vehicleBrandName":"宝马","vehicleCode":"V15517665610000002064","id":3450,"vehicleSeriesName":"5系","vehicleTypeName":"2018款 528Li 上市特别版"}

26.再次强调我踩的坑! @MapperScan的jar包必须正确!yml中配置的地址必须正确!

27.集成thymeleaf模板展示数据到前台,首先添加pom依赖:

        <dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-thymeleaf</artifactId>
			<version>2.2.0.M1</version>
		</dependency>

28.添加yml配置:

spring:
#Thymeleaf配置
  thymeleaf:
    prefix: classpath:/templates/
    suffix: .html
    mode: HTML
    encoding: UTF-8
    cache: false
  #取消缓存，修改即可见
  resources:
    chain:
      strategy:
        content:
          enabled: true
          paths: /**

29.新建html和css,测试:

vehicleList.html

<!DOCTYPE html>
<html lang="en" xmlns:th="http://www.w3.org/1999/xhtml">
<head>
    <meta charset="UTF-8"/>
    <title>Title</title>
    <link rel="stylesheet" href="../test/test.css" type="text/css" />
</head>
<body>
    <table>
        <tr>
            <td>id</td>
            <td>车辆编号</td>
            <td>品牌id</td>
            <td>品牌名称</td>
            <td>厂商id</td>
            <td>厂商名称</td>
            <td>车系id</td>
            <td>车系名称</td>
            <td>车型id</td>
            <td>车型名称</td>
            <td>颜色</td>
        </tr>
        <tr th:each="item : ${list}">
            <td th:text="${{item.id}}"></td>
            <td th:text="${{item.vehicleCode}}"></td>
            <td th:text="${{item.vehicleBrandId}}"></td>
            <td th:text="${{item.vehicleBrandName}}"></td>
            <td th:text="${{item.vehicleVendorId}}"></td>
            <td th:text="${{item.vehicleVendorName}}"></td>
            <td th:text="${{item.vehicleSeriesId}}"></td>
            <td th:text="${{item.vehicleSeriesName}}"></td>
            <td th:text="${{item.vehicleTypeId}}"></td>
            <td th:text="${{item.vehicleTypeName}}"></td>
            <td th:text="${{item.vehicleColor}}"></td>
        </tr>

    </table>
</body>
</html>

test.css

body {
    color: red;
}

table td {
    border: 1px solid black;
}

测试方法:

@RequestMapping("/listTest")
public String listTest(Model model, @RequestParam(required = false) String vehicleColor) {
    Vehicle condition = new Vehicle();
    condition.setVehicleColor(vehicleColor);
    List<Vehicle> list = vehicleService.findVehicleByColor(condition);
    model.addAttribute("list", list);
    return "/vehicle/vehicleList.html";
}

测试结果:

30.td出现双边框,修改css

body {
    color: black;
}

table {
    border-right: 1px solid #F00;
    border-bottom: 1px solid #F00
}

table td {
    border-left: 1px solid #F00;
    border-top: 1px solid #F00
}

31.再次测试,结果:

32.springboot会自己去templates下查询匹配html静态文件,去static下查询匹配css文件和js文件,在html中引入js和css文件:

<link rel="stylesheet" href="../test/test.css" type="text/css" />注意文件层级结构即可;

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