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依赖
<dependency>
<groupId>org.apache.poi</groupId>
<artifactId>poi</artifactId>
<version>3.10.1</version>
</dependency>
//工具类
package com.sk.springboot.Util;
import org.apache.poi.hssf.usermodel.*;
import org.apache.poi.hssf.util.HSSFColor;
public class ExcelWriteUtil {
public static HSSFWorkbook getHSSFWorkbook(String sheetName, String []title, String [][]values, HSSFWorkbook wb){
if(wb == null){
wb = new HSSFWorkbook();
}
HSSFSheet sheet = wb.createSheet(sheetName);
HSSFRow row = sheet.createRow(0);
HSSFCellStyle style = wb.createCellStyle();
HSSFFont font=wb.createFont();
font.setColor(HSSFColor.BLACK.index);//字体颜色
font.setFontHeightInPoints((short)12);
font.setBoldweight(HSSFFont.BOLDWEIGHT_BOLD);//字体增粗
style.setAlignment(HSSFCellStyle.ALIGN_CENTER); // 创建一个居中格式
style.setFont(font);
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++){
row.createCell(j).setCellValue(values[i][j]);
}
}
return wb;
}
}
//测试实现类
package com.sk.springboot.Util;
import com.feibo.shikai.springboot.domain.UserD;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;
import javax.servlet.http.HttpServletResponse;
import java.io.OutputStream;
import java.net.URLEncoder;
import java.util.ArrayList;
import java.util.List;
public class ExcelTest {
public void exportExcelApiInterfaceLog(HttpServletResponse response) {
String filename = "ExcelName.xls";
try {
this.setResponseHeader(response,filename);
HSSFWorkbook wb=this.writeExcel();
OutputStream os = response.getOutputStream();
wb.write(os);
os.flush();
os.close();
} catch (Exception e) {
e.printStackTrace();
}
}
public void setResponseHeader(HttpServletResponse response, String fileName) {
try {
response.setContentType("application/force-download");
response.setHeader("Content-Disposition", "attachment;filename="+ URLEncoder.encode(fileName, "UTF-8"));
} catch (Exception ex) {
ex.printStackTrace();
}
}
public HSSFWorkbook writeExcel(){
//需要写入的实体类,此处我模拟一个实体类
UserD u =new UserD();
u.setId(1L);
u.setName("sk");
u.setPwd("123");
u.setAccount("234");
List userList = new ArrayList();
userList.add(u);
String sheetName="ExcelSheet-Name";
String[][] values = new String[userList.size()][];
String[] titles = null;
titles= new String[]{"id","name","pwd","account"};
for (int i = 0; i <userList.size() ; i++) {
values[i] = new String[titles.length];
//将对象内容转换成string
UserD obj = (UserD) userList.get(i);
values[i][0] = obj.getId().toString();
values[i][1] = obj.getName();
values[i][2] = obj.getPwd();
values[i][3] = obj.getAccount();
}
HSSFWorkbook wb=ExcelWriteUtil.getHSSFWorkbook(sheetName,titles,values,null);
return wb;
}
}