标签：位数组 sel 等等 orm 汇总 格式化数字 教学 粉丝 连接
| 姓名 | 成员介绍 | 任务分配 |
|---|---|---|
| 周炳辉（组长） | 来自网络的一个大佬，穿女装很合适 | poi与servlet |
| 徐宏伟 | 网络中一个具有强大隐藏实力的大哥 | css,部分jsp与html |
| 李金谣 | 旭宝的忠实粉丝，来自格兰迪的挖矿者 | 部分jsp与echarts |
| 龚顺德 | 常规划水，一个默默无闻的人 | 团队博客，Student类 |
public class ExcelUtil {
//默认单元格内容为数字时格式
private static DecimalFormat df = new DecimalFormat("0");
// 默认单元格格式化日期字符串
private static SimpleDateFormat sdf = new SimpleDateFormat( "yyyy-MM-dd HH:mm:ss");
// 格式化数字
private static DecimalFormat nf = new DecimalFormat("0.00");
public static ArrayList<ArrayList<Object>> readExcel(File file){
if(file == null){
return null;
}
if(file.getName().endsWith("xlsx")){
//处理ecxel2007
return readExcel2007(file);
}else{
//处理ecxel2003
return readExcel2003(file);
}
}
/*
* @return 将返回结果存储在ArrayList内，存储结构与二位数组类似
* lists.get(0).get(0)表示过去Excel中0行0列单元格
*/
public static ArrayList<ArrayList<Object>> readExcel2003(File file){
try{
ArrayList<ArrayList<Object>> rowList = new ArrayList<ArrayList<Object>>();
ArrayList<Object> colList;
HSSFWorkbook wb = new HSSFWorkbook(new FileInputStream(file));
int length = wb.getNumberOfSheets();
int index = 0;
for(int i = 0; i < length; i++) {
HSSFSheet tempSheet = wb.getSheetAt(i);
HSSFRow row = tempSheet.getRow(0);
HSSFCell cell = row.getCell(0);
String value = cell.getStringCellValue();
if(value.contains("网络17")) {
index = i;
break;
}
}
HSSFSheet sheet = wb.getSheetAt(index);
HSSFRow row;
HSSFCell cell;
Object value;
for(int i = sheet.getFirstRowNum() , rowCount = 0; rowCount < sheet.getPhysicalNumberOfRows() ; i++ ){
row = sheet.getRow(i);
colList = new ArrayList<Object>();
if(row == null){
//当读取行为空时
if(i != sheet.getPhysicalNumberOfRows()){//判断是否是最后一行
rowList.add(colList);
}
continue;
}else{
rowCount++;
}
for( int j = row.getFirstCellNum() ; j <= row.getLastCellNum() ;j++){
cell = row.getCell(j);
if(cell == null || cell.getCellType() == CellType.BLANK){
//当该单元格为空
if(j != row.getLastCellNum()){//判断是否是该行中最后一个单元格
colList.add("");
}
continue;
}
switch(cell.getCellType()){
case STRING:
value = cell.getStringCellValue();
break;
case NUMERIC:
value = df.format(cell.getNumericCellValue());
break;
case BOOLEAN:
value = Boolean.valueOf(cell.getBooleanCellValue());
break;
case BLANK:
value = "";
break;
default:
value = cell.toString();
}// end switch
colList.add(value);
}//end for j
rowList.add(colList);
}//end for i
return rowList;
}catch(Exception e){
return null;
}
}
public static ArrayList<ArrayList<Object>> readExcel2007(File file){
try{
ArrayList<ArrayList<Object>> rowList = new ArrayList<ArrayList<Object>>();
ArrayList<Object> colList;
XSSFWorkbook wb = new XSSFWorkbook(new FileInputStream(file));
int length = wb.getNumberOfSheets();
int index = 0;
for(int i = 0; i < length; i++) {
XSSFSheet tempSheet = wb.getSheetAt(i);
XSSFRow row = tempSheet.getRow(0);
XSSFCell cell = row.getCell(0);
if(cell!=null&&cell.getCellType()!=CellType.BLANK) {
String value = cell.getStringCellValue();
if(value.contains("网络17")) {
index = i;
break;
}
}
}
XSSFSheet sheet = wb.getSheetAt(index);
XSSFRow row;
XSSFCell cell;
Object value;
for(int i = sheet.getFirstRowNum() , rowCount = 0; rowCount < sheet.getPhysicalNumberOfRows() ; i++ ){
row = sheet.getRow(i);
colList = new ArrayList<Object>();
if(row == null){
//当读取行为空时
if(i != sheet.getPhysicalNumberOfRows()){//判断是否是最后一行
rowList.add(colList);
}
continue;
}else{
rowCount++;
}
for( int j = row.getFirstCellNum() ; j <= row.getLastCellNum() ;j++){
cell = row.getCell(j);
if(cell == null || cell.getCellType() == CellType.BLANK){
//当该单元格为空
if(j != row.getLastCellNum()){//判断是否是该行中最后一个单元格
colList.add("");
}
continue;
}
switch(cell.getCellType()){
case STRING:
value = cell.getStringCellValue();
break;
case NUMERIC:
value = df.format(cell.getNumericCellValue());
break;
case BOOLEAN:
value = Boolean.valueOf(cell.getBooleanCellValue());
break;
case BLANK:
value = "";
break;
default:
value = cell.toString();
}// end switch
colList.add(value);
}//end for j
rowList.add(colList);
}//end for i
return rowList;
}catch(Exception e){
e.printStackTrace();
System.out.println("exception");
return null;
}
}
public static void writeExcel(ArrayList<ArrayList<Object>> result,String path){
if(result == null){
return;
}
XSSFWorkbook wb = new XSSFWorkbook();
XSSFSheet sheet = wb.createSheet("sheet1");
for(int i = 0 ;i < result.size() ; i++){
XSSFRow row = sheet.createRow(i);
if(result.get(i) != null){
for(int j = 0; j < result.get(i).size() ; j ++){
XSSFCell cell = row.createCell(j);
cell.setCellValue(result.get(i).get(j).toString());
}
}
}
ByteArrayOutputStream os = new ByteArrayOutputStream();
try
{
wb.write(os);
} catch (IOException e){
e.printStackTrace();
}
byte[] content = os.toByteArray();
File file = new File(path);//Excel文件生成后存储的位置。
OutputStream fos = null;
try
{
fos = new FileOutputStream(file);
fos.write(content);
os.close();
fos.close();
}catch (Exception e){
e.printStackTrace();
}
}
public static DecimalFormat getDf() {
return df;
}
public static void setDf(DecimalFormat df) {
ExcelUtil.df = df;
}
public static SimpleDateFormat getSdf() {
return sdf;
}
public static void setSdf(SimpleDateFormat sdf) {
ExcelUtil.sdf = sdf;
}
public static DecimalFormat getNf() {
return nf;
}
public static void setNf(DecimalFormat nf) {
ExcelUtil.nf = nf;
}
}public class POIUtil {
public static void buildStandardScale(String path) {
Connection con = null;
PreparedStatement pStatement = null;
Statement stmt = null;
ResultSet rs = null;
ArrayList<ArrayList<Object>> ans;
String sql = "insert into study(id,name,sex,class,major,faculty) values(?,?,?,?,?,?)";
try {
con = JDBCUtil.getConnection();
con.setAutoCommit(false);
ans = new ArrayList<ArrayList<Object>>();
ans = TxtUtil.readFile(path);
// ans = TxtUtil.readFile("C:\\Users\\你们走啊\\Desktop\\study\\学生名单.txt");
stmt = con.createStatement();
pStatement = con.prepareStatement(sql);
for(int i = 1; i < ans.size(); i++) {
String id = ans.get(i).get(0).toString();
String newSql = "select * from study where id = "+id;
rs = stmt.executeQuery(newSql);
String c = "0";
while (rs.next()) {
c = rs.getString(1);
}
if(c.equals("0")) {
for(int j = 1; j <= ans.get(i).size(); j++) {
pStatement.setString(j, ans.get(i).get(j-1).toString());
}
pStatement.addBatch();
pStatement.executeBatch();
con.commit();
}
}
}catch (SQLException sqle) {
sqle.printStackTrace();
}catch(Exception e){
e.printStackTrace();
}finally{
JDBCUtil.realeaseAll(rs, stmt, con, pStatement);
}
}
public static void mergeExcel(String path) {
Connection con = null;
PreparedStatement pStatement = null;
Statement stmt = null;
ResultSet rs = null;
ArrayList<ArrayList<Object>> ans;
ArrayList<Object> cowList;
ArrayList<ArrayList<Object>> errorAns = new ArrayList<ArrayList<Object>>();
ArrayList<Object> temp = new ArrayList<Object>();
temp.add("学号");
temp.add("姓名");
temp.add("该信息所在的文件夹");
errorAns.add(temp);
String sql = "insert into study(id,name,sex,class,major,faculty) values(?,?,?,?,?,?)";
try {
con = JDBCUtil.getConnection();
con.setAutoCommit(false);
stmt = con.createStatement();
// String Path = "C:\\Users\\你们走啊\\Desktop\\新建文件夹";
File file = new File(path);
File[] tempList = file.listFiles();
String tempNameList [] = new String [tempList.length];
for(int i = 0; i < tempList.length; i++) {
if (tempList[i].isFile()) {
tempNameList[i] = tempList[i].toString();
}
}
int begin = 0, index = 0;
ArrayList<ArrayList<Object>> result;
for(int l = 0; l < tempNameList.length; l++) {
begin = 0;
index = 0;
if(tempNameList[l].contains("txt")) {
continue;
}
if(tempNameList[l].contains("错误")) {
continue;
}
if(tempNameList[l].contains("网络汇总")) {
continue;
}
String name;
File newFile = new File(tempNameList[l]);
if(newFile.getName().contains("期中")) {
name = "midterm";
}else if(newFile.getName().contains("期末")) {
name = "terminal";
}else if(newFile.getName().contains("语言程序设计")) {
name = "MOOC";
}else {
name = "pta";
}
result = ExcelUtil.readExcel(newFile);
for(int i = 0 ;i < result.size() ;i++){
for(int j = 0;j<result.get(i).size(); j++){
if(result.get(i).get(j).toString().equals("学号")) begin = i+1;
if(result.get(i).get(j).toString().contains("总分")) {
index = j;
break;
}
}
}
boolean flag;
for(int i = begin; i < result.size(); i++) {
temp = new ArrayList<Object>();
String id = result.get(i).get(0).toString();
flag = false;
if(result.get(i).get(0)==null||result.get(i).get(0).toString().equals("")||result.get(i).get(1)==null||result.get(i).get(1).toString().equals("")) {
flag = false;
}
else {
String newSql2 = "select * from study where id = "+result.get(i).get(0)+" and name = ‘"+result.get(i).get(1)+"‘";
rs = stmt.executeQuery(newSql2);
while(rs.next()) {
flag = true;
}
}
if(!flag) {
temp.add(result.get(i).get(0));
temp.add(result.get(i).get(1));
temp.add(tempNameList[l]);
errorAns.add(temp);
}
String newSql = "update study set "+name+" = (?) where id = "+id;
// String newSql = "update study set "+name.toString()+" = "+result.get(i).get(index).toString()+" where id = "+id;
if(NumberUtil.isNumber(id)){
pStatement = con.prepareStatement(newSql);
pStatement.setString(1, result.get(i).get(index).toString());
pStatement.addBatch();
pStatement.executeBatch();
con.commit();
}
}
}
//将合并excel文件写入新的excel
ans = new ArrayList<ArrayList<Object>>();
sql = "select COLUMN_NAME from information_schema.COLUMNS where table_name = ‘study‘";
rs = stmt.executeQuery(sql);
cowList = new ArrayList<Object>();
while(rs.next()) {
cowList.add(rs.getString(1));
}
ans.add(cowList);
rs.close();
String newSql="select * from study";
rs = stmt.executeQuery(newSql);
while(rs.next()) {
cowList = new ArrayList<Object>();
for(int i = 1; i <= 11; i++)
if(rs.getString(i)==null) {
cowList.add("");
}
else cowList.add(rs.getString(i));
ans.add(cowList);
}
ExcelUtil.writeExcel(ans, path+"/java网络汇总.xlsx");
ExcelUtil.writeExcel(errorAns, path+"/错误汇总表.xlsx");
}catch (SQLException sqle) {
sqle.printStackTrace();
}catch(Exception e){
e.printStackTrace();
}finally{
JDBCUtil.realeaseAll(rs, stmt, con, pStatement);
}
}
根据提示的错误，修改相关的错误。
界面美化，数据库远程连接等等。
标签：位数组 sel 等等 orm 汇总 格式化数字 教学 粉丝 连接
原文地址：https://www.cnblogs.com/gongshunde/p/10265492.html
