POI操作EXCEL之导出Excel（设置有效性，下拉列表引用）

//需要引用的类

import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;

import org.apache.poi.hssf.usermodel.DVConstraint;
import org.apache.poi.hssf.usermodel.HSSFCell;
import org.apache.poi.hssf.usermodel.HSSFDataValidation;
import org.apache.poi.hssf.usermodel.HSSFRow;
import org.apache.poi.hssf.usermodel.HSSFSheet;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;
import org.apache.poi.ss.usermodel.DataValidation;
import org.apache.poi.ss.usermodel.DataValidationConstraint;
import org.apache.poi.ss.usermodel.DataValidationHelper;
import org.apache.poi.ss.usermodel.Sheet;
import org.apache.poi.ss.util.CellRangeAddressList;
import org.apache.poi.xssf.usermodel.XSSFCell;
import org.apache.poi.xssf.usermodel.XSSFRow;
import org.apache.poi.xssf.usermodel.XSSFSheet;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;

//主方法

public static String writeExcel(String str,List mList,String path) throws IOException {
Date dt = new Date();
SimpleDateFormat sdf = new SimpleDateFormat("yyyyMMddHHmmss");
String temp_str = "";
temp_str = sdf.format(dt);
//System.out.println(InExcel.class.getClassLoader().getResource("/").getPath());
// String path = request.getSession().getServletContext().getRealPath("/");
//System.out.println(path+"00000000000000");
String pathname=path+"upload\\"+str+temp_str+".xls";
String pathname1="upload\\"+str+temp_str+".xls";
File file=new File(pathname);
String fileName = file.getName();
String extension = fileName.lastIndexOf(".") == -1 ? "" : fileName
.substring(fileName.lastIndexOf(".") + 1);

//判断文件类型

if ("xls".equals(extension)) {
WriteIn(file,"xls");
String[][] data=check(str);
write2003Excel(file.getPath(),mList,data,str);
return pathname1;

} else if ("xlsx".equals(extension)) {
String[][] data=check(str);
// write2007Excel(file.getPath(),mList,data);

} else {

throw new IOException("不支持的文件类型");

}
return "error";

}

//写入excel方法
public static String WriteIn(File file,String extension) throws IOException{
//2003xls文件创建模式
FileOutputStream fileOut = new FileOutputStream(file.getAbsolutePath());
if ("xls".equals(extension)) {
HSSFWorkbook wb = new HSSFWorkbook();
HSSFSheet sheet1 = wb.createSheet("Sheet1");
HSSFSheet sheet2 = wb.createSheet("Sheet2");
HSSFSheet sheet3 = wb.createSheet("Sheet3");
wb.write(fileOut);
}else if ("xlsx".equals(extension)){
//2007模式的写法
XSSFWorkbook wb = new XSSFWorkbook();
XSSFSheet sheet1 = wb.createSheet("Sheet1");
XSSFSheet sheet2 = wb.createSheet("Sheet2");
XSSFSheet sheet3 = wb.createSheet("Sheet3");
wb.write(fileOut);
}

fileOut.close();
return "success";
}

/**
* 协查有效性和标题筛选
* @param str
* @return
*/
public static String[][] check(String str){
if("00201".equals(str)){
//标题 ： 姓名 性别 身份证号码 死亡时间
String[] bzbt={"姓名","性别 ","身份证号码","救助业务名称","救助证号","救助金额","救助开始时间 ","救助结束时间"};
//有效性 ： 0-未知的性别,1-男性,2-女性,9-未说明的性别
String[] bzdata2={ "0-未知的性别","1-男性","2-女性","9-未说明的性别"};
//01-救灾救济,02-城市社会救助,03-双拥、优抚、安置,04-社会事务与社会福利,05-慈善事业
String[] bzdata3={ "01-救灾救济","02-城市社会救助","03-双拥、优抚、安置","04-社会事务与社会福利","05-慈善事业"};
//行有效性
String [] bzdatarow={"1","3"};
String[][] a ={bzbt,bzdata2,bzdata3,bzdatarow};
return a;
}

return null;

}

//下拉列表元素很多的情况

private static HSSFDataValidation SetDataValidation(String strFormula,int firstRow,int firstCol,int endRow,int endCol)
{
//String formula = "Sheet2!$A$2:$A$59" ;// 表示Z列1-N行作为下拉列表来源数据
// HSSFDataValidation dataValidation = new HSSFDataValidation((short) 1,
// (short) 1, (short) 300, (short) 1); //原顺序为 起始行 起始列 终止行 终止列
// dataValidation.setDataValidationType(HSSFDataValidation.DATA_TYPE_LIST);
// dataValidation.setFirstFormula(formula);
// dataValidation.setSecondFormula(null);
CellRangeAddressList regions = new CellRangeAddressList(firstRow, endRow, firstCol, endCol);
// CellRangeAddressList regions = new CellRangeAddressList( firstRow,
// (short) 300, (short) 1, (short) 1);//add 新顺序为 起始行 终止行 起始列 终止列
DVConstraint constraint = DVConstraint.createFormulaListConstraint(strFormula);//add
HSSFDataValidation dataValidation = new HSSFDataValidation(regions,constraint);//add

dataValidation.createErrorBox("Error", "Error");
dataValidation.createPromptBox("", null);

return dataValidation;
}
//255以内的下拉
public static DataValidation setDataValidation(Sheet sheet,String[] textList, int firstRow, int endRow, int firstCol, int endCol) {

DataValidationHelper helper = sheet.getDataValidationHelper();
// 加载下拉列表内容
DataValidationConstraint constraint = helper.createExplicitListConstraint(textList);
// DVConstraint constraint = new DVConstraint();
constraint.setExplicitListValues(textList);

// 设置数据有效性加载在哪个单元格上。
// 四个参数分别是：起始行、终止行、起始列、终止列
CellRangeAddressList regions = new CellRangeAddressList((short) firstRow, (short) endRow, (short) firstCol, (short) endCol);

// 数据有效性对象
DataValidation data_validation = helper.createValidation(constraint, regions);
//DataValidation data_validation = new DataValidation(regions, constraint);

return data_validation;
}

//write 2003Excel
public static void write2003Excel(String filePath,List list,String[][] data,String str) {

try {
if(list.size()<=60000){
//创建excel文件对象

HSSFWorkbook wb = new HSSFWorkbook(new FileInputStream(filePath));
//创建一个张表
HSSFSheet sheet;
//创建行对象
HSSFRow row = null;

//创建表格对象

HSSFCell cell = null;

sheet = wb.getSheetAt(0);

//   sheet.addValidationData(setDataValidation(sheet,data[1], 1,list.size(), 1, 1));
String[] num=data[data.length-1];
System.out.println(num.length);
if (data.length>1) {
for(int i=0;i<num.length;i++){
int rowdata=Integer.parseInt(num[i]);
sheet.addValidationData(setDataValidation(sheet,data[i+1], 1,list.size(),rowdata , rowdata));
System.out.println("我出现"+rowdata);
}
}
if("00301".equals(str)){
String strFormula = "Sheet2!$A$2:$A$59" ;
sheet.addValidationData(SetDataValidation(strFormula, 1, 5, list.size(), 5));
}

row=sheet.createRow(0);
for (int i = 0; i < data[0].length; i++) {
cell=row.createCell(i);

cell.setCellValue(data[0][i]);
}

//循环行
for (int i=1; i <=list.size(); i++) {
row = sheet.createRow(i);
//循环列

for (int j=0; j<data[0].length; j++) {
cell = row.createCell(j);//创建单元格
String m=String.valueOf(list.get(i-1)).replace("[", "").replace("]", "");
String[] a=m.split(",");
cell.setCellValue(a[j]);//赋值
//  cell.setCellFormula("Sheet2!$A$2:$A$59");

}
}
//select Ahd010401,Ahd010405,Ahd010404,Ahd010409,Ahd010410,Ahd010406,Ahd010408,Ahd010416 from res_00301
if("00301".equals(str)){
String[] bzdata4={"民族","01-汉族","02-蒙古族","03-回族","04-藏族","05-维吾尔族","06-苗族","07-彝族","08-壮族","09-布依族","10-朝鲜族","11-满族","12-侗族","13-瑶族","14-白族","15-土家族","16-哈尼族","17-哈萨克族","18-傣族","19-黎族","20-傈僳族","21-佤族","22-畲族","23-高山族","24-拉祜族","25-水族","26-东乡族","27-纳西族","28-景颇族","29-柯尔克孜族","30-土族","31-达斡尔族","32-仫佬族","33-羌族","34-布朗族","35-撒拉族","36-毛难族","37-仡佬族","38-锡伯族","39-阿昌族","40-普米族","41-塔吉克族","42-怒族","43-乌孜别克族","44-俄罗斯族","45-鄂温克族","46-德昂族","47-保安族","48-裕固族","49-京族","50-塔塔尔族","51-独龙族","52-鄂伦春族","53-赫哲族","54-门巴族","55-珞巴族","56-基诺族","98-外国血统","99-其他"};
sheet=wb.getSheetAt(1);
for (int i = 0; i < bzdata4.length; i++) {
row=sheet.createRow(i);
cell=row.createCell(0);
cell.setCellValue(bzdata4[i]);
}
}

FileOutputStream out = new FileOutputStream(filePath);

wb.write(out);

out.close();
}else {
throw new IOException("超出excel的可写范围，可写为60000行");
}

} catch (Exception e) {

e.printStackTrace();

}

}