标签:用户信息 表格 gets try his row ring getc mem
第一步,添加依赖:
<!--poi-excel-->
<dependency>
<groupId>org.apache.poi</groupId>
<artifactId>poi</artifactId>
<version>3.6</version>
</dependency>
引入ExcelUtil 工具类:
public class ExcelUtil {
/**
* 导出Excel
* @param sheetName sheet名称
* @param title 标题
* @param values 内容
* @param wb HSSFWorkbook对象
* @return
*/
public static HSSFWorkbook getHSSFWorkbook(String sheetName,String []title,String [][]values, HSSFWorkbook wb){
// 第一步,创建一个HSSFWorkbook,对应一个Excel文件
if(wb == null){
wb = new HSSFWorkbook();
}
// 第二步,在workbook中添加一个sheet,对应Excel文件中的sheet
HSSFSheet sheet = wb.createSheet(sheetName);
// 第三步,在sheet中添加表头第0行,注意老版本poi对Excel的行数列数有限制
HSSFRow row = sheet.createRow(0);
// 第四步,创建单元格,并设置值表头 设置表头居中
HSSFCellStyle style = wb.createCellStyle();
style.setAlignment(HSSFCellStyle.ALIGN_CENTER); // 创建一个居中格式
//声明列对象
HSSFCell cell = null;
//创建标题
for(int i=0;i<title.length;i++){
cell = row.createCell(i);
cell.setCellValue(title[i]);
cell.setCellStyle(style);
}
//创建内容
for(int i=0;i<values.length;i++){
row = sheet.createRow(i + 1);
for(int j=0;j<values[i].length;j++){
//将内容按顺序赋给对应的列对象
row.createCell(j).setCellValue(values[i][j]);
}
}
return wb;
}
}
在controller实现:
@RequestMapping("/export")
@ResponseBody
public void export(HttpServletRequest request, HttpServletResponse response) throws Exception {
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
//获取数据
List<BsAuthUser> list = bsAuthUserService.queryAllBsAuthUser();//查询到了所有的用户
//excel标题
String[] title = {"用户Id", "用户密码", "用户名", "创建日期", "状态"};
//excel文件名
String fileName = "用户表" + System.currentTimeMillis() + ".xls";
//sheet名
String sheetName = "用户信息表";
String content[][] = new String[list.size()][title.length];
for (int i = 0; i < list.size(); i++) {
BsAuthUser obj = list.get(i);
content[i][0] = obj.getAuthUserId().toString();
content[i][1] = obj.getAuthPassword();
content[i][2] = obj.getAuthUsername();
content[i][3] = sdf.format(obj.getCreateDate());
content[i][4] = obj.getState().toString();
}
//创建HSSFWorkbook
HSSFWorkbook wb = ExcelUtil.getHSSFWorkbook(sheetName, title, content, null);
//响应到客户端
try {
this.setResponseHeader(response, fileName);
OutputStream os = response.getOutputStream();
wb.write(os);
os.flush();
os.close();
} catch (Exception e) {
e.printStackTrace();
}
}
//发送响应流方法
public void setResponseHeader(HttpServletResponse response, String fileName) {
try {
try {
fileName = new String(fileName.getBytes(), "ISO8859-1");
} catch (UnsupportedEncodingException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
response.setContentType("application/octet-stream;charset=ISO8859-1");
response.setHeader("Content-Disposition", "attachment;filename=" + fileName);
response.addHeader("Pargam", "no-cache");
response.addHeader("Cache-Control", "no-cache");
} catch (Exception ex) {
ex.printStackTrace();
}
}
下载地址是浏览器的默认下载地址。
标签:用户信息 表格 gets try his row ring getc mem
原文地址:https://www.cnblogs.com/chenzhengwei/p/10723572.html