springboot-导入excel数据存入数据库

项目代码：https://github.com/snowlavenderlove/springbootImportExcel.git

1.创建数据库springimport_excel，并创建表user

2.创建excel,内容如下

3.官网：https://start.spring.io/创建 项目springbootImportExcel，官网创建项目博文：https://blog.csdn.net/qq_37231511/article/details/90669242

4.通过mybatis-generator自动生成代码，mybatis-generator自动代码生成博文：

https://blog.csdn.net/qq_37231511/article/details/90692784，生成的代码放到项目中，如图

5.pom.xml添加依赖，完整代码如下

<?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>1.5.2.RELEASE</version>
		<relativePath/> <!-- lookup parent from repository -->
	</parent>
	<groupId>com.xue</groupId>
	<artifactId>springbootImportExcel</artifactId>
	<version>0.0.1-SNAPSHOT</version>
	<name>springbootImportExcel</name>
	<description>Demo project for Spring Boot</description>

	<properties>
		<java.version>1.8</java.version>
		<maven-jar-plugin.version>3.0.0</maven-jar-plugin.version>
	</properties>

	<dependencies>
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-data-jpa</artifactId>
		</dependency>
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-thymeleaf</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>1.3.0</version>
		</dependency>

		<dependency>
			<groupId>mysql</groupId>
			<artifactId>mysql-connector-java</artifactId>
			<scope>runtime</scope>
		</dependency>
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-test</artifactId>
			<scope>test</scope>
		</dependency>
		<dependency>
		    <groupId>commons-logging</groupId>
		    <artifactId>commons-logging</artifactId>
		    <version>1.2</version>
		</dependency>
		<dependency>
		    <groupId>com.alibaba</groupId>
		    <artifactId>druid</artifactId>
		    <version>1.1.17</version>
		</dependency>	
		<dependency>
			<groupId>org.apache.poi</groupId>
			<artifactId>poi</artifactId>
			<version>3.15</version>
		</dependency>
		<dependency>
			<groupId>org.apache.poi</groupId>
			<artifactId>poi-ooxml</artifactId>
			<version>3.15</version>
		</dependency>
		<dependency>
            <groupId>commons-fileupload</groupId>
            <artifactId>commons-fileupload</artifactId>
            <version>1.3.1</version>
        </dependency>
        		<dependency>
            <groupId>commons-io</groupId>
            <artifactId>commons-io</artifactId>
            <version>2.4</version>
        </dependency>
	</dependencies>

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

</project>

6.配置文件application.properties

#mysql
spring.datasource.driver-class-name=com.mysql.jdbc.Driver
spring.datasource.url=jdbc:mysql://127.0.0.1:3306/springimport_excel?&useUnicode=true&characterEncoding=UTF-8
spring.datasource.username=root
spring.datasource.password=123456

#druid
spring.datasource.type=com.alibaba.druid.pool.DruidDataSource
#dao
mybatis.type-aliases-package==com.xue.repository.dao
mybatis.mapper-locations=classpath*:com/xue/repository/mapper/*.xml
#thymeleaf
#spring.thymeleaf.prefix=classpath:/templates/
#spring.thymeleaf.suffix=.jsp
spring.thymeleaf.encoding=UTF-8

7.创建controller层，创建UserController

package com.xue.controller;

import javax.servlet.http.HttpSession;
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.RequestParam;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.multipart.MultipartFile;

import com.xue.service.UserService;

@Controller
public class UserController {
	
	@Autowired
	private UserService userService;
	
	/**
	 * 页面
	 */
	@RequestMapping("/index")
	public String index(){
		
		return "index";
	}
	
	/**
	 * 导入excel
	 */
	@RequestMapping("/import")
	@ResponseBody
	public String excelImport(@RequestParam(value="filename")MultipartFile file,HttpSession session){
		
//		String fileName = file.getOriginalFilename();
		
		int result = 0;
		
		try {
			result = userService.addUser(file);
		} catch (Exception e) {

			e.printStackTrace();
		}
		
		if(result > 0){
			return "excel文件数据导入成功！";
		}else{
			return "excel数据导入失败！";
		}
		
	}
	

}

8.创建service层，创建接口UserService与接口实现类UserServiceImpl

 UserService

package com.xue.service;

import org.springframework.web.multipart.MultipartFile;

public interface UserService {
//	增加用户
	public int addUser(MultipartFile file) throws Exception;

}

 UserServiceImpl

package com.xue.service.Impl;

import java.io.InputStream;
import java.util.ArrayList;
import java.util.List;

import org.apache.poi.hssf.usermodel.HSSFWorkbook;
import org.apache.poi.ss.usermodel.Cell;
import org.apache.poi.ss.usermodel.Row;
import org.apache.poi.ss.usermodel.Sheet;
import org.apache.poi.ss.usermodel.Workbook;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.web.multipart.MultipartFile;

import com.xue.entity.model.User;
import com.xue.repository.dao.UserMapper;
import com.xue.service.UserService;
import com.xue.transcation.MyException;
@Service
public class UserServiceImpl implements UserService {
	
	@Autowired
	private UserMapper userMapper;

	@Override
	public int addUser(MultipartFile file) throws Exception{
		
		int result = 0;
//		存放excel表中所有user细腻
		List<User> userList = new ArrayList<>();
		/**
		 * 
		 * 判断文件版本
		 */
		String fileName = file.getOriginalFilename();
		String suffix = fileName.substring(fileName.lastIndexOf(".")+1);
		
		InputStream ins = file.getInputStream();
		
		Workbook wb = null;
		
		if(suffix.equals("xlsx")){
			
			wb = new XSSFWorkbook(ins);
			
		}else{
			wb = new HSSFWorkbook(ins);
		}
		/**
		 * 获取excel表单
		 */
		Sheet sheet = wb.getSheetAt(0);
		
		
		/**
		 * line = 2 :从表的第三行开始获取记录
		 * 
		 */
		if(null != sheet){
			
			for(int line = 2; line <= sheet.getLastRowNum();line++){
				
				User user = new User();
				
				Row row = sheet.getRow(line);
				
				if(null == row){
					continue;
				}
				/**
				 * 判断单元格类型是否为文本类型
				 */
				if(1 != row.getCell(0).getCellType()){
					throw new MyException("单元格类型不是文本类型！");
				}
				
				/**
				 * 获取第一个单元格的内容
				 */
				String username = row.getCell(0).getStringCellValue();
				
				row.getCell(1).setCellType(Cell.CELL_TYPE_STRING);
				/**
				 * 获取第二个单元格的内容
				 */
				
				String password = row.getCell(1).getStringCellValue();
				
				user.setUsername(username);
				user.setPassword(password);
				userList.add(user);
	
			}
			
			for(User userInfo:userList){
			
				/**
				 * 判断数据库表中是否存在用户记录，若存在，则更新，不存在，则保存记录
				 */
				String name = userInfo.getUsername();
				
				int count = userMapper.selectUser(name);
				
				if(0 == count){			
					result = userMapper.addUser(userInfo);
				}else{
					result = userMapper.updateUser(userInfo);
				}

				
				
			}
		}

		return result;
	}
	
	

}

9.编辑dao层UserMapper.java与UserMapper.xml文件最后添加：

UserMapper.java

    //    增
    int addUser(User user);
    //  查
    int selectUser(String username);
    //  改
    int updateUser(User user);

UserMapper.xml

  <insert id="addUser" parameterType="com.xue.entity.model.User" >
      insert into user(username,password) values(#{username},#{password})      
  </insert>
  <select id="selectUser" resultType="java.lang.Integer">
      select count(*) from user where username=#{username}
  </select>
  <update id="updateUser" parameterType="com.xue.entity.model.User" >
      update user set password = #{password} where username = #{username}
  </update>

 10.创建自定义异常类MyException

package com.xue.transcation;

public class MyException extends RuntimeException {
	
	private static final long serialVersionId = 1L;

	public MyException(String message) {
		super(message);
		// TODO Auto-generated constructor stub
	}
}

11.编辑主程序类

package com.xue;

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

@SpringBootApplication
@MapperScan("com.xue.repository.dao")
public class SpringbootImportExcelApplication {

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

}

 12.创建html页面index.html

<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8"/>
<title>Insert title here</title>
</head>
<body>
<h1>导入EXCEL</h1>
<br/>
<form class="form-horizontal" id="form_table" action="/import" enctype="multipart/form-data" method="post">
        <button type="submit" class="btn btn-primary">导入</button>
        <input class="form-input" type="file" name="filename"></input>
    </form>
</body>
</html>

13.至此项目代码完成，在浏览器输入localhost:8080/index,上传文件，导入：

14.查看数据库记录