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springboot+thymeleaf+layui的实现示例

作者:左边的天堂

本文主要介绍了springboot+thymeleaf+layui的实现示例,文中通过示例代码介绍的非常详细,对大家的学习或者工作具有一定的参考学习价值,需要的朋友们下面随着小编来一起学习学习吧

一、背景

公司运营的同事有个任务,提供一个数据文件给我,然后从数据库中找出对应的加密串再导出来给他。这个活不算是很难,但时不时就会有需求。

同事给我的文件有时是给excel表格,每一行有4列,逗号隔开,合并成一列数据,这类文件需要把所有数据复制到文本编辑器进行处理,把逗号替换成空格,再使用列块编辑模式复制2、3、4列替换原来的excel数据。有时是给.DAT的文件,这类文件需要手动修改后缀为csv,修改后就跟普通的excel表格一样打开,去掉第一列。最后添加一行表头,再对第一列进行筛选去重。

去重后准备导入到数据库的临时表,在此之前需要手动清空临时表的历史数据。导入后再执行一段sql语句,然后把查询结果导出为excel文件给到同事。

这样的工作重复重复再重复,确实挺无趣的,何不鼓捣一个工具给同事自己去处理?

二、步骤

2.1 项目搭建

项目结构如下图:

创建项目,使用springboot 2.5.14poi 4.1.2mybatis,前端使用 thymeleaf + layui-v2.6.8 。

具体看maven配置

<?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">
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.5.14</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>

    <groupId>com.xxx</groupId>
    <artifactId>test</artifactId>
    <version>1.0</version>

    <properties>
        <maven.compiler.source>8</maven.compiler.source>
        <maven.compiler.target>8</maven.compiler.target>
    </properties>

    <dependencies>
        <!-- Spring框架基本的核心工具 -->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-context-support</artifactId>
        </dependency>
        <!-- SpringBoot Web容器 -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
            <exclusions>
                <exclusion>
                    <groupId>org.apache.tomcat.embed</groupId>
                    <artifactId>tomcat-embed-el</artifactId>
                </exclusion>
                <exclusion>
                    <groupId>org.apache.tomcat.embed</groupId>
                    <artifactId>tomcat-embed-websocket</artifactId>
                </exclusion>
            </exclusions>
        </dependency>
        
        <!-- thymeleaf -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-thymeleaf</artifactId>
        </dependency>

        <dependency>
            <groupId>org.mybatis.spring.boot</groupId>
            <artifactId>mybatis-spring-boot-starter</artifactId>
            <version>2.1.4</version>
            <exclusions>
                <exclusion>
                    <groupId>com.zaxxer</groupId>
                    <artifactId>HikariCP</artifactId>
                </exclusion>
            </exclusions>
        </dependency>

        <!-- 阿里数据库连接池 -->
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>druid-spring-boot-starter</artifactId>
            <version>1.2.16</version>
        </dependency>

        <!-- Mysql驱动包 -->
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
        </dependency>

        <!--常用工具类 -->
        <dependency>
            <groupId>org.apache.commons</groupId>
            <artifactId>commons-lang3</artifactId>
        </dependency>

        <!-- io常用工具类 -->
        <dependency>
            <groupId>commons-io</groupId>
            <artifactId>commons-io</artifactId>
            <version>2.11.0</version>
        </dependency>

        <!-- excel工具 -->
        <dependency>
            <groupId>org.apache.poi</groupId>
            <artifactId>poi-ooxml</artifactId>
            <version>4.1.2</version>
            <exclusions>
                <exclusion>
                    <groupId>org.apache.commons</groupId>
                    <artifactId>commons-math3</artifactId>
                </exclusion>
                <exclusion>
                    <groupId>org.zaxxer</groupId>
                    <artifactId>SparseBitSet</artifactId>
                </exclusion>
            </exclusions>
        </dependency>

        <!-- servlet包 -->
        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>javax.servlet-api</artifactId>
        </dependency>

        <!-- lombok -->
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <scope>provided</scope>
        </dependency>

    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <version>3.1</version>
                <configuration>
                    <source>${java.version}</source>
                    <target>${java.version}</target>
                    <encoding>${project.build.sourceEncoding}</encoding>
                </configuration>
            </plugin>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
                <version>2.7.3</version>
                <executions>
                    <execution>
                        <goals>
                            <goal>repackage</goal>
                        </goals>
                    </execution>
                </executions>
                <configuration>
                    <mainClass>com.xxx.AdminApplication</mainClass>
                </configuration>
            </plugin>
        </plugins>
    </build>

</project>

为了节省jar包体积,尽可能把不需要的依赖给排除。

2.2 后端处理逻辑

Controller内容

import com.xxx.domain.Result;
import com.xxx.domain.CellItem;
import com.xxx.domain.HelmetConfig;
import com.xxx.service.HelmetService;
import com.xxx.utils.file.DatUtil;
import com.xxx.utils.poi.ExcelUtil;
import org.apache.commons.io.FilenameUtils;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.multipart.MultipartFile;

import javax.annotation.Resource;
import javax.servlet.http.HttpServletResponse;
import java.util.Arrays;
import java.util.List;

/**
 * 通用请求处理
 *
 * @author admin
 */
@Controller
public class CommonController {
    public static final String[] EXCEL_EXTENSION = {"xls", "xlsx", "XLS", "XLSX"};
    public static final String DAT_EXTENSION = "DAT";

    @Resource
    private HelmetService helmetService;

    @GetMapping(value = {"/", "/index"})
    public String index(Model model) {
        return "index";
    }

    /**
     * 通用下载请求
     */
    @GetMapping("/download")
    public void fileDownload(HttpServletResponse response) {
        List<HelmetConfig> list = helmetService.queryAll();
        ExcelUtil<HelmetConfig> util = new ExcelUtil<>(HelmetConfig.class);
        util.exportExcel(response, list, "Sheet1");
    }

    /**
     * 通用上传请求(单个)
     */
    @PostMapping("/upload")
    @ResponseBody
    public Result uploadFile(MultipartFile file) {
        if (file == null || file.isEmpty()) {
            return Result.error("文件不能为空");
        }
        String extension = FilenameUtils.getExtension(file.getOriginalFilename());
        List<CellItem> list;
        if (Arrays.asList(EXCEL_EXTENSION).contains(extension)) {
            list = ExcelUtil.getData(file);
        } else if (DAT_EXTENSION.equalsIgnoreCase(extension)) {
            list = DatUtil.readDat(file);
        } else {
            return Result.error("文件格式不正确");
        }
        if (list.isEmpty()) {
            return Result.error("操作失败,请重试");
        }
        helmetService.batchAdd(list);
        return Result.success("操作成功,请点击【下载文件】");
    }
}

数据库根据最后的查询sql创建一个视图(View),通过mybatis对这个试图进行查询,然后把结构进行导出即可。

ExcelUtil.getData()内容

public static List<CellItem> getData(MultipartFile file) {
    InputStream inputStream = null;
    List<CellItem> rowList = new ArrayList<>();
    try {
        inputStream = file.getInputStream();
        XSSFWorkbook wb = new XSSFWorkbook(inputStream);

        int ignoreRows = 0;
        int sheetNum = wb.getNumberOfSheets();
        //for循环:取前N个表,下标从0开始
        for (int i = 0; i < sheetNum; i++) {
            XSSFSheet sheetI = wb.getSheetAt(i);
            //列数
            int cellSize = sheetI.getRow(0).getLastCellNum();
            //第N+1行开始,可以通过传参,从第N+1行开始取
            for (int rowIndex = ignoreRows; rowIndex <= sheetI.getLastRowNum(); rowIndex++) {
                XSSFRow row = sheetI.getRow(rowIndex);
                if (row == null) {
                    continue;
                }
                if (cellSize == 1) {
                    XSSFCell cell = row.getCell(0);
                    String cellValue = cell.getStringCellValue();
                    if (cellValue.contains(",")) {
                        CellItem item = new CellItem();
                        String[] cells = cellValue.split(",");
                        String deviceId = cells[1];
                        Boolean exists = checkExists(rowList, deviceId);
                        if (exists) {
                            continue;
                        }
                        item.setDeviceId(deviceId.trim());
                        item.setProductId(cells[2]);
                        item.setMac(cells[3]);
                        rowList.add(item);
                    }
                } else if (cellSize == 4){
                    //在每行中的每一列,从下标1开始,忽略第一列,一直取到所有
                    CellItem item = new CellItem();
                    String deviceId = row.getCell(1).getStringCellValue();
                    Boolean exists = checkExists(rowList, deviceId);
                    if (exists) {
                        continue;
                    }
                    item.setDeviceId(deviceId.trim());
                    item.setProductId(row.getCell(2).getStringCellValue());
                    item.setMac(row.getCell(3).getStringCellValue());
                    rowList.add(item);
                }
            }
        }
    } catch (IOException e) {
        e.printStackTrace();
    } finally {
        if (inputStream != null) {
            try {
                inputStream.close();
            } catch (Exception e) {
                log.error("文件流关闭失败:{}", e.getMessage());
            }
        }
    }
    return rowList;
}

private static Boolean checkExists(List<CellItem> rowList, String key) {
    for (int i = 0; i < rowList.size(); i++) {
        CellItem item = rowList.get(i);
        if (item.getDeviceId().equals(key.trim())) {
            return Boolean.TRUE;
        }
    }
    return Boolean.FALSE;
}

DatUtil.readDat()

public static List<CellItem> readDat(MultipartFile file) {
    List<CellItem> list = new ArrayList<>();
    try (BufferedReader reader = new BufferedReader(new InputStreamReader(file.getInputStream()))) {
        String line;
        while ((line = reader.readLine()) != null) {
            String[] split = line.split(",");
            String deviceId = split[1];
            Boolean exists = checkExists(list, deviceId);
            if (exists) {
                continue;
            }
            CellItem item = new CellItem();
            item.setDeviceId(deviceId.trim());
            item.setMac(split[2]);
            item.setProductId(split[3]);
            list.add(item);
        }
    } catch (IOException e) {
        e.printStackTrace();
    }
    return list;
}

private static Boolean checkExists(List<CellItem> rowList, String key) {
    for (int i = 0; i < rowList.size(); i++) {
        CellItem item = rowList.get(i);
        if (item.getDeviceId().equals(key.trim())) {
            return Boolean.TRUE;
        }
    }
    return Boolean.FALSE;
}

导出的代码这里省略了。

2.3 配置

application.yml

# 开发环境配置
server:
  # 服务器的HTTP端口
  port: 8080
  servlet:
    # 应用的访问路径
    context-path: /

# Spring配置
spring:
  profiles:
    active: druid
  #thymeleaf 页面的缓存开关
  thymeleaf:
    enabled: true
    cache: true
    mode: HTML5
    encoding: utf-8
    suffix: .html
  # 文件上传
  servlet:
    multipart:
      # 单个文件大小
      max-file-size: 10MB
      # 设置总上传的文件大小
      max-request-size: 50MB

# MyBatis配置
mybatis:
  # 搜索指定包别名
  typeAliasesPackage: com.xxx.domain
  # 配置mapper的扫描,找到所有的mapper.xml映射文件
  mapperLocations: classpath:mapper/*.xml
  # 加载全局的配置文件
  configLocation: classpath:mybatis/mybatis-config.xml

# 日志配置
logging:
  level:
    com.xxx: info
    org.springframework: warn

数据库配置application-druid.yml

# 数据源配置
spring:
  datasource:
    type: com.alibaba.druid.pool.DruidDataSource
    driver-class-name: com.mysql.cj.jdbc.Driver
    url: jdbc:mysql://172.16.1.2:3306/test?useUnicode=true&useSSL=false&allowLoadLocalInfile=false&autoReconnect=true&characterEncoding=utf8&zeroDateTimeBehavior=convertToNull&serverTimezone=GMT%2B8
    username: root
    password: root
    #Spring Boot 默认是不注入这些属性值的,需要自己绑定
    #druid 数据源专有配置
    initialSize: 5
    minIdle: 5
    maxActive: 20
    maxWait: 60000
    timeBetweenEvictionRunsMillis: 60000
    minEvictableIdleTimeMillis: 300000
    validationQuery: SELECT 1 FROM DUAL
    testWhileIdle: true
    testOnBorrow: false
    testOnReturn: false
    poolPreparedStatements: true

2.3 前端处理逻辑

layui的相关文件放到resources/static目录,再新建一个index.html文件放入resources/templates目录,这两个目录是thymeleaf默认的,如果要修改可以在application.yml进行配置。静态文件如下:

在这里插入图片描述

为了压缩jar包的体积,把所有不必要的文件都精简掉了。

以下是index.html内容

<!DOCTYPE html>
<html lang="en" xmlns:th="http://www.thymeleaf.org">
<head>
  <meta charset="UTF-8">
  <title>测试</title>
  <script th:src="@{/layui.js}"></script>
  <link rel="stylesheet" th:href="@{/css/layui.css}" rel="external nofollow"  media="all">
</head>
<body>
  <div class="layui-card">
    <div class="layui-card-header">操作面板</div>
    <div class="layui-card-body">
      <div class="layui-tab" lay-filter="window">
        <ul class="layui-tab-title">
          <li class="layui-this" lay-id="uploadTab">文件上传</li>
          <li lay-id="downloadTab">文件下載</li>
        </ul>
        <div class="layui-tab-content">
          <div class="layui-tab-item layui-show">
            <form id="upload_form" class="layui-form" enctype="multipart/form-data">
              <div class="layui-form-item">
                <label class="layui-form-label">文件</label>
                <div class="layui-input-block">
                  <button type="button" class="layui-btn" id="upload">
                    <i class="layui-icon">&#xe61f;</i>选择文件
                  </button>
                </div>
              </div>
              <div class="layui-form-item">
                <div class="layui-input-block">
                  <button id="btnSubmit" class="layui-btn" onclick="return false;">立即提交</button>
                </div>
              </div>
            </form>
          </div>
          <div class="layui-tab-item">
            <div class="layui-form-item">
              <label class="layui-form-label">文件</label>
              <div class="layui-input-block">
                <button type="button" class="layui-btn" id="downloadBtn">
                  <i class="layui-icon">&#xe601;</i>下载文件
                </button>
              </div>
            </div>
          </div>
        </div>
      </div>
    </div>
  </div>
</body>
</html>
<script>
    layui.use(['upload', 'layer', 'element'], function () {
        let $ = layui.jquery
            , layer = layui.layer
            , element = layui.element
            , upload = layui.upload;

        //执行实例
        upload.render({
            elem: '#upload' //绑定元素
            , url: '/upload' //上传接口
            , accept: 'file' //允许上传的文件类型,不写默认是图片
            , acceptMime: ".xlsx,.xls,.DAT,.dat" //不写默认验证图片格式,一定要省略【exts】参数
            , auto: false //选择文件后不自动上传
            , bindAction: '#btnSubmit' //指向一个按钮触发上传
            , before: function (obj) {
                layer.load(); //上传loading
            }
            ,done: function (res) {
                console.log(res)
                layer.closeAll('loading'); //关闭loading
                layer.alert(res.msg);
                if (res.code === 200) {
                    element.tabChange('window', 'downloadTab');
                }
            }
            , error: function (res) {
                console.error(res)
                layer.msg(res.msg);
                layer.closeAll('loading'); //关闭loading
            }
        });
        

        $("#downloadBtn").on('click', function () {
            location.href = "/download";
        })
    });
</script>

编辑好测试没问题直接打包放到服务器上执行就可以啦。

三、实现效果

3.1 文件导入

在这里插入图片描述

导入成功后会自动切换到【文件下载】的tab页

3.2 文件导出

在这里插入图片描述

到此这篇关于springboot+thymeleaf+layui的实现示例的文章就介绍到这了,更多相关springboot thymeleaf layui内容请搜索脚本之家以前的文章或继续浏览下面的相关文章希望大家以后多多支持脚本之家!

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