FrameworkPoiexcel，csv文件导入导出解决方案
poi 框架 framework-poi
> 简单、好用且轻量级的海量 excel，csv 文件导入导出解决方案。
1.解决火狐浏览器，中文名乱码问题
2.解决数据量过大 OOM 问题
3.导出字段可以自定义格式
4.支持多sheet导出
5.支持excel单个sheet最大行，自动生成新sheet继续导出
> 注：excel 的合并功能及复杂功能，使用代码实现比较复杂，框架只提供单行的导入导出。
如何使用？
引入 Maven 依赖或下载 jar 包
<dependency>
<groupId>com.github.fartherp</groupId>
<artifactId>framework-poi</artifactId>
<version>3.0.5</version>
</dependency>
CSV 常用例子：
CSVRead.read(CSVReadTest.class.getResourceAsStream("/a.csv"), new CSVReadDeal<CsvReadDto>() {
// 单条数据处理（每一行对应一个javabean）
public CsvReadDto dealBean(String[] arr) {
CsvReadDto dto = new CsvReadDto();
dto.setId(Long.valueOf(arr[0]));
dto.setName(arr[1]);
dto.setAge(Integer.valueOf(arr[2]));
return dto;
}
// 批量数据处理（可以批量入库）
public void dealBatchBean(List<CsvReadDto> list) {
Assert.assertEquals("name1";, list.get(0).getName());
Assert.assertEquals("name2", list.get(1).getName());
Assert.assertEquals("name3", list.get(2).getName());
}
// 批量加载多少数据，统一处理（默认1000）
public int getBatchCount() {
return super.getBatchCount();
}
// 从第几行开始加载（默认跳过第一行）
public int skipLine() {
return super.skipLine();
}
});
1. CSV 文件导出：
String filename = "TEST";
String[] title = SheetsTitlesEnum.USER_LOGIN_LOG.getTitle();
List<String[]> bodyList = new ArrayList<>();
CsvUtil.writeCsvFile(filename, title, bodyList);
2.浏览器下载 CSV 文件：
HttpServletResponse response = null;
HttpServletRequest request = null;
String filename = "TEST";
String[] title = SheetsTitlesEnum.USER_LOGIN_LOG.getTitle();
List<String[]> bodyList = new ArrayList<>();
CsvUtil.writeCsvFile(response, request, filename, title, bodyList);
Excel 常用例子：
1. Excel 文件导入：
ExcelRead.read(ExcelReadTest.class.getResourceAsStream("/a.xls"), new ExcelReadDeal<ExcelReadDto>() {
// 单条数据处理（每一行对应一个javabean）
public ExcelReadDto dealBean(Row row) {
ExcelReadDto dto = new ExcelReadDto();
dto.setId(new BigDecimal(row.getCell(0).toString()).longValue());
dto.setName(row.getCell(1).toString());
dto.setAge(Integer.valueOf(row.getCell(2).toString()));
return dto;
}
// 批量数据处理（可以批量入库）
public void dealBatchBean(List<ExcelReadDto> list) {
Assert.assertEquals("name1", list.get(0).getName());
Assert.assertEquals("name2", list.get(1).getName());
Assert.assertEquals("name3", list.get(2).getName());
}
// 批量加载多少数据，统一处理（默认1000）
public int getBatchCount() {
return super.getBatchCount();
}
// 从第几行开始加载（默认跳过第一行）
public int skipLine() {
return super.skipLine();
}
});
2.Excel 文件导出：
private WriteDeal<ExcelDto> get() {
return obj -> {
String[] result = new String[6];
result[0] = obj.getTime();
result[1] = obj.getName();
result[2] = obj.getClient();
result[3] = obj.getVersion();
result[4] = obj.getIp();
result[5] = obj.getStatus() + "";
return result;
};
}
String[] title = new String [6];
title[0] = "登录时间";
title[1] = "用户名";
title[2] = "访问端";
title[3] = "版本系统";
title[4] = "登录IP";
title[5] = "状态";
String fileName = "D:\\style1.xls";
FileExcelWrite.build(fileName)
.deal(title, get(), ExcelWriteStyleTest.getList())
.deal(title, get(), ExcelWriteStyleTest.getList1())
.write();
3. Excel 文件导出（风格，可以自定义风格）：
String fileName = "D:\\styleInputStream.xls";
FileExcelWrite.build(this.getClass().getResourceAsStream("/c.xls"), fileName)
.deal(new WriteDeal<ExcelDto>() {
public String[] dealBean(ExcelDto obj) {
String[] result = new String[3];
result[0] = obj.getId() + "";
result[1] = obj.getName();
result[2] = obj.getAge() + "";
return result;
}
public int skipLine() {
return 4;
}
public Map<String, Object> additional() {
Map<String, Object> map = new HashMap<>();
map.put("quoteCurrency", "ETH");
map.put("symbol", "USDT_ETH");
map.put("startTime", "2019-01-09 00:00:00");
map.put("endTime", "2019-01-09 12:00:00");
return map;
}
}, getList())
.write();
4.多个 sheet 导出：
String[] title = new String [6];
title[0] = "登录时间";
title[1] = "用户名";
title[2] = "访问端";
title[3] = "版本系统";
title[4] = "登录IP";
title[5] = "状态";
String fileName = "D:\\style1.xls";
String[] title1 = new String [6];
title1[0] = "id";
title1[1] = "type";
title1[2] = "desc";
FileExcelWrite.build(fileName)
.deal(title, obj -> {
String[] result = new String[6];
result[0] = obj.getTime();
result[1] = obj.getName();
result[2] = obj.getClient();
result[3] = obj.getVersion();
result[4] = obj.getIp();
result[5] = obj.getStatus() + "";
return result;
}, ExcelDataList.getList1())
.deal(title1, obj -> {
String[] result = new String[3];
result[0] = obj.getId() + "";
result[1] = obj.getType();
result[2] = obj.getDesc();
return result;
}, ExcelDataList.getTenList1())
.write();
5.多个 sheet 导出（自定义sheet名称）：
String[] title = new String [6];
title[0] = "登录时间";
title[1] = "用户名";
title[2] = "访问端";
title[3] = "版本系统";
title[4] = "登录IP";
title[5] = "状态";
String fileName = "D:\\style1.xls";
String[] title1 = new String [6];
title1[0] = "id";
title1[1] = "type";
title1[2] = "desc";
FileExcelWrite.build(fileName)
.deal(title, new WriteDeal<ExcelDto>() {
@Override
public String[] dealBean(ExcelDto obj) {
String[] result = new String[6];
result[0] = obj.getTime();
result[1] = obj.getName();
result[2] = obj.getClient();
result[3] = obj.getVersion();
result[4] = obj.getIp();
result[5] = obj.getStatus() + "";
return result;
}
@Override
public String name() {
return "ExcelDto";
}
}, ExcelDataList.getList1())
.deal(title1, new WriteDeal<ExcelDto1>() {
@Override
public String[] dealBean(ExcelDto1 obj) {
String[] result = new String[3];
result[0] = obj.getId() + "";
result[1] = obj.getType();
result[2] = obj.getDesc();
return result;
}
@Override
public String name() {
return "test";
}
}, ExcelDataList.getTenList1())
.write();
6.浏览器下载 Excel 文件：
String[] title = new String [6];
title[0] = "登录时间";
title[1] = "用户名";
title[2] = "访问端";
title[3] = "版本系统";
title[4] = "登录IP";
title[5] = "状态";
String fileName = "D:\\style1.xls";
HttpServletResponseExcelWrite.build(fileName, request, response)
.deal(title, get(), ExcelWriteStyleTest.getList())
.deal(title, get(), ExcelWriteStyleTest.getList1())
.write();
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