从零玩转EasyPoi-cong-ling-wan-zhuan-easypoi

title: 从零玩转EasyPoi
date: 2023-01-11 13:49:25.908
updated: 2023-03-30 13:23:20.817
url: http://www.yby6.com/archives/cong-ling-wan-zhuan-easypoi
categories: 
tags: 

1.设计精巧,使用简单
2.接口丰富,扩展简单
3.默认值多,write less do more
4.AbstractView 支持,web导出可以简单明了

- 导出
    1.正规excel导出 (格式简单,数据量可以,5W以内吧)
        注解方式:  ExcelExportUtil.exportExcel(ExportParams entity, Class<?> pojoClass,Collection<?> dataSet) 
    2.不定多少列,但是格式依然简单数据库不大
        自定义方式: ExcelExportUtil.exportExcel(ExportParams entity, List<ExcelExportEntity> entityList,Collection<?> dataSet)
    3.数据量大超过5W,还在100W以内
        注解方式 ExcelExportUtil.exportBigExcel(ExportParams entity, Class<?> pojoClass,IExcelExportServer server, Object queryParams)
        自定义方式: ExcelExportUtil.exportBigExcel(ExportParams entity, List<ExcelExportEntity> excelParams,IExcelExportServer server, Object queryParams)
    4.样式复杂,数据量尽量别大
        模板导出 ExcelExportUtil.exportExcel(TemplateExportParams params, Map<String, Object> map)
    5.一次导出多个风格不一致的sheet
        模板导出 ExcelExportUtil.exportExcel(Map<Integer, Map<String, Object>> map,TemplateExportParams params) 
    6.一个模板但是要导出非常多份
        模板导出 ExcelExportUtil.exportExcelClone(Map<Integer, List<Map<String, Object>>> map,TemplateExportParams params)
    7.模板无法满足你的自定义,试试html
        自己构造html,然后我给你转成excel  ExcelXorHtmlUtil.htmlToExcel(String html, ExcelType type)
    8.数据量过百万级了.放弃excel吧,csv导出
        注解方式: CsvExportUtil.exportCsv(CsvExportParams params, Class<?> pojoClass, OutputStream outputStream)
        自定义方式: CsvExportUtil.exportCsv(CsvExportParams params, List<ExcelExportEntity> entityList, OutputStream outputStream)
    9.word导出
        模板导出: WordExportUtil.exportWord07(String url, Map<String, Object> map)
    10.PDF导出
        模板导出: TODO 
- 导入 
    如果想提高性能 ImportParams 的concurrentTask 可以帮助并发导入,仅单行,最小1000
    excel有单个的那种特殊读取,readSingleCell 参数可以支持
    1. 不需要检验,数据量不大(5W以内)
        注解或者MAP: ExcelImportUtil.importExcel(File file, Class<?> pojoClass, ImportParams params)
    2. 需要导入,数据量不大
        注解或者MAP: ExcelImportUtil.importExcelMore(InputStream inputstream, Class<?> pojoClass, ImportParams params)
    3. 数据量大了,或者你有特别多的导入操作,内存比较少,仅支持单行
       SAX方式  ExcelImportUtil.importExcelBySax(InputStream inputstream, Class<?> pojoClass, ImportParams params, IReadHandler handler)
    4. 数据量超过EXCEL限制,CSV读取
        小数据量: CsvImportUtil.importCsv(InputStream inputstream, Class<?> pojoClass,CsvImportParams params)
        大数据量: CsvImportUtil.importCsv(InputStream inputstream, Class<?> pojoClass,CsvImportParams params, IReadHandler readHandler)

1.导出时间XLS比XLSX快2-3倍
2.导出大小XLS是XLSX的2-3倍或者更多
3.导出需要综合网速和本地速度做考虑^~^

1.easypoi 父包--作用大家都懂得
2.easypoi-annotation 基础注解包,作用与实体对象上,拆分后方便maven多工程的依赖管理
3.easypoi-base 导入导出的工具包,可以完成Excel导出,导入,Word的导出,Excel的导出功能
4.easypoi-web  耦合了spring-mvc 基于AbstractView,极大的简化spring-mvc下的导出功能
5.sax 导入使用xercesImpl这个包(这个包可能造成奇怪的问题哈),word导出使用poi-scratchpad,都作为可选包了

	@ExcelTarget("courseEntity")
	public class CourseEntity implements java.io.Serializable {
	/** 主键 */
	private String id;
	/** 课程名称 */
	@Excel(name = "课程名称", orderNum = "1", needMerge = true)
	private String name;
	/** 老师主键 */
	@ExcelEntity(id = "yuwen")
	@ExcelVerify()
	private TeacherEntity teacher;
	/** 老师主键 */
	@ExcelEntity(id = "shuxue")
	private TeacherEntity shuxueteacher;

	@ExcelCollection(name = "选课学生", orderNum = "4")
	private List<StudentEntity> students;

	HSSFWorkbook workbook = ExcelExportUtil.exportExcel(new ExportParams(
				"2412312", "测试", "测试"), CourseEntity.class, list);

	ExportParams params = new ExportParams("2412312", "测试", "测试");
	params.setAddIndex(true);
	HSSFWorkbook workbook = ExcelExportUtil.exportExcel(params,
			TeacherEntity.class, telist);

	List<ExcelExportEntity> entity = new ArrayList<ExcelExportEntity>();
	entity.add(new ExcelExportEntity("姓名", "name"));
	entity.add(new ExcelExportEntity("性别", "sex"));

	List<Map<String, String>> list = new ArrayList<Map<String, String>>();
	Map<String, String> map;
	for (int i = 0; i < 10; i++) {
		map = new HashMap<String, String>();
		map.put("name", "1" + i);
		map.put("sex", "2" + i);
		list.add(map);
	}

	HSSFWorkbook workbook = ExcelExportUtil.exportExcel(new ExportParams(
			"测试", "测试"), entity, list);	

	TemplateExportParams params = new TemplateExportParams();
	params.setHeadingRows(2);
	params.setHeadingStartRow(2);
	Map<String,Object> map = new HashMap<String, Object>();
    map.put("year", "2013");
    map.put("sunCourses", list.size());
    Map<String,Object> obj = new HashMap<String, Object>();
    map.put("obj", obj);
    obj.put("name", list.size());
	params.setTemplateUrl("org/jeecgframework/poi/excel/doc/exportTemp.xls");
	Workbook book = ExcelExportUtil.exportExcel(params, CourseEntity.class, list,
			map);

	ImportParams params = new ImportParams();
	params.setTitleRows(2);
	params.setHeadRows(2);
	//params.setSheetNum(9);
	params.setNeedSave(true);
	long start = new Date().getTime();
	List<CourseEntity> list = ExcelImportUtil.importExcel(new File(
			"d:/tt.xls"), CourseEntity.class, params);

	@RequestMapping(params = "exportXls")
	public String exportXls(CourseEntity course,HttpServletRequest request,HttpServletResponse response
			, DataGrid dataGrid,ModelMap map) {

        CriteriaQuery cq = new CriteriaQuery(CourseEntity.class, dataGrid);
        org.jeecgframework.core.extend.hqlsearch.HqlGenerateUtil.installHql(cq, course, request.getParameterMap());
        List<CourseEntity> courses = this.courseService.getListByCriteriaQuery(cq,false);

        map.put(NormalExcelConstants.FILE_NAME,"用户信息");
        map.put(NormalExcelConstants.CLASS,CourseEntity.class);
        map.put(NormalExcelConstants.PARAMS,new ExportParams("课程列表", "导出人:Jeecg",
                "导出信息"));
        map.put(NormalExcelConstants.DATA_LIST,courses);
        return NormalExcelConstants.JEECG_EXCEL_VIEW;

	}

    @Excel(name = "Email", width = 25)
    @Max(value = 15,message = "max 最大值不能超过15")
    private int email;
    /**
     * 手机号
     */
    @Excel(name = "Mobile", width = 20)
    @NotNull
    private String mobile;
    
    ExcelImportResult<ExcelVerifyEntity> result = ExcelImportUtil.importExcelVerify(new File(
            "d:/tt.xls"), ExcelVerifyEntity.class, params);
    for (int i = 0; i < result.getList().size(); i++) {
        System.out.println(ReflectionToStringBuilder.toString(result.getList().get(i)));
    }

	ImportParams params = new ImportParams();
	List<Map<String,Object>> list = ExcelImportUtil.importExcel(new File(
			"d:/tt.xls"), Map.class, params);

	PoiBaseView
	public static void render(Map<String, Object> model, HttpServletRequest request,
                              HttpServletResponse response, String viewName) {
        PoiBaseView view = null;
        if (BigExcelConstants.BIG_EXCEL_VIEW.equals(viewName)) {
            view = new BigExcelExportView();
        } else if (MapExcelConstants.JEECG_MAP_EXCEL_VIEW.equals(viewName)) {
            view = new JeecgMapExcelView();
        } else if (NormalExcelConstants.JEECG_EXCEL_VIEW.equals(viewName)) {
            view = new JeecgSingleExcelView();
        } else if (TemplateExcelConstants.JEECG_TEMPLATE_EXCEL_VIEW.equals(viewName)) {
            view = new JeecgTemplateExcelView();
        } else if (MapExcelGraphConstants.MAP_GRAPH_EXCEL_VIEW.equals(viewName)) {
            view = new MapGraphExcelView();
        }
        try {
            view.renderMergedOutputModel(model, request, response);
        } catch (Exception e) {
            LOGGER.error(e.getMessage(), e);
        }
    }
	// Demo
	@RequestMapping(params = "exportXls")
	public void exportXls(CourseEntity course,HttpServletRequest request,HttpServletResponse response
			, DataGrid dataGrid,ModelMap map) {
        CriteriaQuery cq = new CriteriaQuery(CourseEntity.class, dataGrid);
        org.jeecgframework.core.extend.hqlsearch.HqlGenerateUtil.installHql(cq, course, request.getParameterMap());
        List<CourseEntity> courses = this.courseService.getListByCriteriaQuery(cq,false);
        map.put(NormalExcelConstants.FILE_NAME,"用户信息");
        map.put(NormalExcelConstants.CLASS,CourseEntity.class);
        map.put(NormalExcelConstants.PARAMS,new ExportParams("课程列表", "导出人:Jeecg",
                "导出信息"));
        map.put(NormalExcelConstants.DATA_LIST,courses);
        PoiBaseView.render(map,request,response,NormalExcelConstants.JEECG_EXCEL_VIEW);
	}