java jxls导出excel

制作模板

注意：在第一行第一列上添加批注

jx:area(lastCell="K4")

在表格里面添加下面代码

jx:each(items="personList" var="person" lastCell="K4")

maven依赖

<dependency>
    <groupId>cn.hutoolgroupId>
    <artifactId>hutool-allartifactId>
    <version>5.6.0version>
dependency>


<dependency>
    <groupId>org.jxlsgroupId>
    <artifactId>jxls-poiartifactId>
    <version>2.9.0version>
dependency>

创建工具类

import cn.hutool.core.date.DateUtil;
import cn.hutool.core.io.resource.ClassPathResource;
import cn.hutool.core.util.CharsetUtil;
import cn.hutool.core.util.StrUtil;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.jexl3.JexlBuilder;
import org.apache.commons.jexl3.JexlEngine;
import org.jxls.common.Context;
import org.jxls.expression.JexlExpressionEvaluator;
import org.jxls.transform.Transformer;
import org.jxls.util.JxlsHelper;
import org.springframework.http.HttpHeaders;
import org.springframework.http.MediaType;

import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletResponse;
import java.io.InputStream;
import java.net.URLEncoder;
import java.util.HashMap;
import java.util.Map;

/**
 * @Author：dcy
 * @Description:
 * @Date: 2021/7/13 15:20
 */
@Slf4j
public class JxlsUtils {

    /**
     * 导出excel
     *
     * @param response
     * @param fileName
     * @param dataMap
     * @param templateName
     */
    public static void export(HttpServletResponse response, String fileName, Map<String, ?> dataMap, String templateName) {
        try {
            // 设置响应头信息
            ServletOutputStream outputStream = response.getOutputStream();
            response.setHeader(HttpHeaders.CONTENT_DISPOSITION, "attachment;filename=" + URLEncoder.encode(fileName, CharsetUtil.UTF_8));
            response.setContentType(MediaType.APPLICATION_OCTET_STREAM_VALUE);
            response.setCharacterEncoding(CharsetUtil.UTF_8);
            // 读取模板路径
            ClassPathResource classPathResource = new ClassPathResource(templateName);
            final InputStream inputStream = classPathResource.getStream();
            // 设置模板参数
            Context context = new Context();
            dataMap.forEach(context::putVar);
            JxlsHelper jxlsHelper = JxlsHelper.getInstance();
            Transformer transformer = jxlsHelper.createTransformer(inputStream, outputStream);
            //获得配置 + 添加自定义功能
            JexlExpressionEvaluator evaluator = (JexlExpressionEvaluator) transformer.getTransformationConfig().getExpressionEvaluator();
            Map<String, Object> functions = new HashMap<>();
            functions.put("str", new StrUtil());
            functions.put("date", new DateUtil());
            final JexlEngine jexlEngine = new JexlBuilder().silent(true).strict(true).namespaces(functions).create();
            evaluator.setJexlEngine(jexlEngine);
            jxlsHelper.processTemplate(context, transformer);
        } catch (Exception ex) {
            log.error("export {}", ex.getMessage());
        }
    }

}

测试方法

public class EquPerson {

    /**
     * 姓名
     */
    private String name;


}

@GetMapping("/export")
public void export(HttpServletResponse response) {
    Map<String, Object> map = new HashMap<>();
    map.put("schoolName", "测试学校");
    List<EquPerson> equPersonList = new ArrayList<>();
    for (int i = 0; i < 10; i++) {
        final EquPerson equPerson = new EquPerson();
        equPerson.setName("张三");
        equPersonList.add(equPerson);
    }
    map.put("personList", equPersonList);
    JxlsUtils.export(response, "xx人员导出表.xlsx", map, "jxls/equ_person.xlsx");
}

展示效果

参考链接

https://www.cnblogs.com/klguang/p/6425422.html
https://www.cnblogs.com/dw3306/p/11098841.html