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java excel导入_java 实现excel中的数据导入到数据库表的功能(简单版)

java excel导入_java 实现excel中的数据导入到数据库表的功能(简单版)

项目框架

1,后台:spring+springmvc+mybatis

2,前台: bootstrap+jquery+ajax

3,项目管理:maven

说明.excel处理函数需要引入poi的jar包,在pom.xml引入一下代码

<!-- POI -->  
<dependency>  
    <groupId>org.apache.poi</groupId>  
    <artifactId>poi</artifactId>  
    <version>3.8</version>  
    <exclusions>  
        <exclusion>  
            <artifactId>commons-codec</artifactId>  
            <groupId>commons-codec</groupId>  
        </exclusion>  
    </exclusions>  
</dependency>  
<dependency>  
    <groupId>org.apache.poi</groupId>  
    <artifactId>poi-ooxml</artifactId>  
    <version>3.8</version>  
</dependency>  
           

别的框架大体上也是可以的,只需稍微调整,如有问题,大家可留言讨论

实现的功能说明:将用户信息(姓名,性别,年龄)通过excel上传,并保存到数据库

具体代码如下

1,前台html代码

<form enctype="multipart/form-data" id="batchUpload"  action="user/upload" method="post" class="form-horizontal">    
    <button class="btn btn-success btn-xs" id="uploadEventBtn" style="height:26px;"  type="button" >选择文件</button>  
    <input type="file" name="file"  style="width:0px;height:0px;" id="uploadEventFile">  
    <input id="uploadEventPath"  disabled="disabled"  type="text" placeholder="请选择excel表" style="border: 1px solid #e6e6e6; height: 26px;width: 200px;" >                                           
</form>  
<button type="button" class="btn btn-success btn-sm"  οnclick="user.uploadBtn()" >上传</button>  
           

前台页面效果

excel内容展示

2,JS代码

var User = function(){  
    this.init = function(){  
        //模拟上传excel  
         $("#uploadEventBtn").unbind("click").bind("click",function(){  
             $("#uploadEventFile").click();  
         });  
         $("#uploadEventFile").bind("change",function(){  
             $("#uploadEventPath").attr("value",$("#uploadEventFile").val());  
         });  
    };  
    //点击上传按钮  
    this.uploadBtn = function(){  
        var uploadEventFile = $("#uploadEventFile").val();  
        if(uploadEventFile == ''){  
            alert("请选择excel,再上传");  
        }else if(uploadEventFile.lastIndexOf(".xls")<0){//可判断以.xls和.xlsx结尾的excel 
            alert("只能上传Excel文件");  
        }else{  
            var url =  '/user/upload/';  
            var formData = new FormData($('form')[0]);  
            user.sendAjaxRequest(url,'POST',formData);  
        }  
    };  
    this.sendAjaxRequest = function(url,type,data){  
        $.ajax({  
            url : url,  
            type : type,  
            data : data,  
            success : function(result) {  
                alert( result);  
            },  
            error : function() {  
                alert( "excel上传失败");  
            },  
            cache : false,  
            contentType : false,  
            processData : false  
        });  
    };  
}  
var user;  
$(function(){  
    user = new User();  
    user.init();  
});  
3,domain层用户的实体类


/**  
 * @author  liuchj  
 * @version 1.0    
 */  
public class User {  
    private  String name;  
    private String sex;  
    private String age;  
    public String getName() {  
        return name;  
    }  
    public void setName(String name) {  
this.name = name;  
    }  
    public String getSex() {  
        return sex;  
    }  
    public void setSex(String sex) {  
this.sex = sex;  
    }  
    public String getAge() {  
        return age;  
    }  
    public void setAge(String age) {  
        this.age = age;  
    }  
} 
           

4,controller层代码

@Controller  
@RequestMapping("/user")  
public class UserController{  
    @Autowired  
    private UserService  userService;  
    @RequestMapping(value="/upload",method = RequestMethod.POST)  
    @ResponseBody  
    public String  upload(@RequestParam(value="file",required = false)MultipartFile file,HttpServletRequest request, HttpServletResponse response){  
        Sring result = userService.readExcelFile(file);  
        return result;  
    }  
}  
           

5,service层代码

1),service层接口

public interface UserService {  
    /** 
     * 读取excel中的数据,生成list 
     */  
    String readExcelFile( MultipartFile file);  
}  
           

2),service实现层代码

@Service  
public class MeetingRoomServiceImpl implements MeetingRoomService {  
@Override  
    public String readExcelFile(MultipartFile file) {  
        String result ="";  
        //创建处理EXCEL的类  
        ReadExcel readExcel=new ReadExcel();  
        //解析excel,获取上传的事件单  
        List<User> useList = readExcel.getExcelInfo(file);  
        //至此已经将excel中的数据转换到list里面了,接下来就可以操作list,可以进行保存到数据库,或者其他操作,  
        //和你具体业务有关,这里不做具体的示范  
        if(useList != null && !useList.isEmpty()){  
            result = "上传成功";  
        }else{  
            result = "上传失败";  
        }  
        return result;  
    }  
} 
           

3),excel处理函数

/**  
 * @author liuchj
 * @version 1.0    
 */  
public class ReadExcel {  
    //总行数  
    private int totalRows = 0;    
    //总条数  
    private int totalCells = 0;   
    //错误信息接收器  
    private String errorMsg;  
    //构造方法  
    public ReadExcel(){}  
    //获取总行数  
    public int getTotalRows()  { return totalRows;}   
    //获取总列数  
    public int getTotalCells() {  return totalCells;}   
    //获取错误信息  
    public String getErrorInfo() { return errorMsg; }    
  /** 
   * 读EXCEL文件,获取信息集合 
   * @param fielName 
   * @return 
   */  
    public List<User> getExcelInfo(MultipartFile mFile) {  
        String fileName = mFile.getOriginalFilename();//获取文件名  
        try {  
            if (!validateExcel(fileName)) {// 验证文件名是否合格  
                return null;  
            }  
            boolean isExcel2003 = true;// 根据文件名判断文件是2003版本还是2007版本  
            if (isExcel2007(fileName)) {  
                isExcel2003 = false;  
            }  
            List<User> userList = createExcel(mFile.getInputStream(), isExcel2003);  
        } catch (Exception e) {  
            e.printStackTrace();  
        }  
        return userList;  
    }  
  /** 
   * 根据excel里面的内容读取客户信息 
   * @param is 输入流 
   * @param isExcel2003 excel是2003还是2007版本 
   * @return 
   * @throws IOException 
   */  
    public List<User> createExcel(InputStream is, boolean isExcel2003) {  
        try{  
            Workbook wb = null;  
            if (isExcel2003) {// 当excel是2003时,创建excel2003  
                wb = new HSSFWorkbook(is);  
            } else {// 当excel是2007时,创建excel2007  
                wb = new XSSFWorkbook(is);  
            }  
            List<User> userList = readExcelValue(wb);// 读取Excel里面客户的信息  
        } catch (IOException e) {  
            e.printStackTrace();  
        }  
        return userList;  
    }  
  /** 
   * 读取Excel里面客户的信息 
   * @param wb 
   * @return 
   */  
    private List<User> readExcelValue(Workbook wb) {  
        // 得到第一个shell  
        Sheet sheet = wb.getSheetAt(0);  
        // 得到Excel的行数  
        this.totalRows = sheet.getPhysicalNumberOfRows();  
        // 得到Excel的列数(前提是有行数)  
        if (totalRows > 1 && sheet.getRow(0) != null) {  
            this.totalCells = sheet.getRow(0).getPhysicalNumberOfCells();  
        }  
        List<User> userList = new ArrayList<User>();  
        // 循环Excel行数  
        for (int r = 1; r < totalRows; r++) {  
            Row row = sheet.getRow(r);  
            if (row == null){  
                continue;  
            }  
            User user = new User();  
            // 循环Excel的列  
            for (int c = 0; c < this.totalCells; c++) {  
                Cell cell = row.getCell(c);  
                if (null != cell) {  
                    if (c == 0) {  
                        //如果是纯数字,比如你写的是25,cell.getNumericCellValue()获得是25.0,通过截取字符串去掉.0获得25  
                        if(cell.getCellType() == HSSFCell.CELL_TYPE_NUMERIC){  
                            String name = String.valueOf(cell.getNumericCellValue());  
                            user.setName(name.substring(0, name.length()-2>0?name.length()-2:1));//名称  
                        }else{  
                            user.setName(cell.getStringCellValue());//名称  
                        }  
                    } else if (c == 1) {  
                        if(cell.getCellType() == HSSFCell.CELL_TYPE_NUMERIC){  
                            String sex = String.valueOf(cell.getNumericCellValue());  
                            user.setSex(sex.substring(0, sex.length()-2>0?sex.length()-2:1));//性别  
                        }else{  
                            user.setSex(cell.getStringCellValue());//性别  
                        }  
                    } else if (c == 2){  
                        if(cell.getCellType() == HSSFCell.CELL_TYPE_NUMERIC){  
                            String age = String.valueOf(cell.getNumericCellValue());  
                            user.setAge(age.substring(0, age.length()-2>0?age.length()-2:1));//年龄  
                        }else{  
                            user.setAge(cell.getStringCellValue());//年龄  
                        }  
                    }  
                }  
            }  
            // 添加到list  
            userList.add(user);  
        }  
        return userList;  
    }  
    /** 
     * 验证EXCEL文件 
     *  
     * @param filePath 
     * @return 
     */  
    public boolean validateExcel(String filePath) {  
        if (filePath == null || !(isExcel2003(filePath) || isExcel2007(filePath))) {  
            errorMsg = "文件名不是excel格式";  
            return false;  
        }  
        return true;  
    }  
    // @描述:是否是2003的excel,返回true是2003   
    public static boolean isExcel2003(String filePath)  {    
         return filePath.matches("^.+.(?i)(xls)$");    
     }    
    //@描述:是否是2007的excel,返回true是2007   
    public static boolean isExcel2007(String filePath)  {    
         return filePath.matches("^.+.(?i)(xlsx)$");    
     }    
}
           

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