Java处理Excel数据库数据

所需要的依赖

<dependency>
	<groupId>com.alibaba</groupId>
	<artifactId>fastjson</artifactId>
	<version>1.2.7</version>
</dependency>
<dependency>
	<groupId>net.sourceforge.jexcelapi</groupId>
	<artifactId>jxl</artifactId>
	<version>2.6.10</version>
</dependency>
<dependency>
	<groupId>org.mybatis.generator</groupId>
	<artifactId>mybatis-generator-core</artifactId>
	<version>1.3.7</version>
</dependency>

数据格式

处理代码简单示例

import java.io.File;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.lang.reflect.Array;
import java.util.ArrayList;
import java.util.List;

import org.apache.commons.lang3.StringUtils;
import org.mybatis.generator.internal.util.JavaBeansUtil;
import org.springframework.util.ResourceUtils;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONArray;
import com.alibaba.fastjson.JSONObject;
import com.xquant.platform.test.entity.pclass.TtrdSetInstruction;

import jxl.Cell;
import jxl.Sheet;
import jxl.Workbook;
import jxl.read.biff.BiffException;

public class ExcelToJsonUtils {
	public static void main(String[] args) {
		String resourceLocation = "classpath:通用表查询 (22).xls";
		String sheetName = "ttrd_set_instruction";
		Class<?> targetType = TtrdSetInstruction.class;
		File file = null;
		try {
			file = ResourceUtils.getFile(resourceLocation);
			String fileName = file.getName();
			boolean isValidFile = StringUtils.endsWithIgnoreCase(fileName, ".xlsx")
					|| StringUtils.endsWithIgnoreCase(fileName, ".xls");
			if (!isValidFile) {
				throw new RuntimeException("不支持的格式文件" + fileName + "仅支持xlsx格式或xls格式");
			}
		} catch (FileNotFoundException e) {
			throw new RuntimeException(e.getMessage(), e);
		}
		Workbook workbook = null;
		JSONArray jsonArray = new JSONArray();
		try {
			workbook = Workbook.getWorkbook(file);
			Sheet sheet = workbook.getSheet(sheetName);
			int columns = sheet.getColumns();
			int rows = sheet.getRows();
			if (columns < 1 || rows < 1) {
				throw new RuntimeException("无有效数据");
			}
			Cell[] cells = sheet.getRow(0);
			List<String> columnKeyList = new ArrayList<String>(columns);
			for (Cell cell : cells) {
				// 考虑到数据库列名与映射类的属性之间存在差异 将列名进行驼峰处理 该工具类来自于MyBatisGenerator
				// 通过MyBatisGenerator可以根据数据库自动成数据层需要的简单java类、Mapper接口和xml文件
				String key = JavaBeansUtil.getCamelCaseString(cell.getContents(), false);
				columnKeyList.add(key);
			}
			for (int i = 1; i < rows; i++) {
				JSONObject object = new JSONObject();
				for (int j = 0; j < columns; j++) {
					// 编译每一行的每一列数据 每一行都是一个JSONObject
					object.put(columnKeyList.get(j), sheet.getCell(j, i).getContents());
				}
				jsonArray.add(object);
			}
			if (rows > 2) {
				// 如果行数超过2 说明返回的数据是数组
				targetType = Array.newInstance(targetType, 1).getClass();
			}
			// jsonArray.toJSONString()可以获取到json字符串;
			Object result = JSON.toJavaObject(jsonArray, targetType);
			System.out.println(result);
		} catch (BiffException | IOException e) {
			e.printStackTrace();
		} finally {
			if (workbook != null) {
				workbook.close();
			}
		}
	}
}