JAVA工具类(5) --- 批量导入excel表格数据到数据库中

1、创建导入抽象类

package com.gcloud.common.excel;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.PrintStream;
import java.sql.SQLException;
import java.util.ArrayList;
import java.util.List;

import org.apache.poi.hssf.eventusermodel.EventWorkbookBuilder.SheetRecordCollectingListener;
import org.apache.poi.hssf.eventusermodel.FormatTrackingHSSFListener;
import org.apache.poi.hssf.eventusermodel.HSSFEventFactory;
import org.apache.poi.hssf.eventusermodel.HSSFListener;
import org.apache.poi.hssf.eventusermodel.HSSFRequest;
import org.apache.poi.hssf.eventusermodel.MissingRecordAwareHSSFListener;
import org.apache.poi.hssf.eventusermodel.dummyrecord.LastCellOfRowDummyRecord;
import org.apache.poi.hssf.eventusermodel.dummyrecord.MissingCellDummyRecord;
import org.apache.poi.hssf.model.HSSFFormulaParser;
import org.apache.poi.hssf.record.BOFRecord;
import org.apache.poi.hssf.record.BlankRecord;
import org.apache.poi.hssf.record.BoolErrRecord;
import org.apache.poi.hssf.record.BoundSheetRecord;
import org.apache.poi.hssf.record.FormulaRecord;
import org.apache.poi.hssf.record.LabelRecord;
import org.apache.poi.hssf.record.LabelSSTRecord;
import org.apache.poi.hssf.record.NoteRecord;
import org.apache.poi.hssf.record.NumberRecord;
import org.apache.poi.hssf.record.RKRecord;
import org.apache.poi.hssf.record.Record;
import org.apache.poi.hssf.record.SSTRecord;
import org.apache.poi.hssf.record.StringRecord;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;
import org.apache.poi.poifs.filesystem.POIFSFileSystem;

/**
* 导入抽象类
* Created by charlin on 2017/9/7.
*/
public abstract class HxlsAbstract implements HSSFListener {
private int minColumns;
private POIFSFileSystem fs;
private PrintStream output;

private int lastRowNumber;
private int lastColumnNumber;

/** Should we output the formula, or the value it has? */
private boolean outputFormulaValues = true;

/** For parsing Formulas */
private SheetRecordCollectingListener workbookBuildingListener;
private HSSFWorkbook stubWorkbook;

// Records we pick up as we process
private SSTRecord sstRecord;
private FormatTrackingHSSFListener formatListener;

/** So we known which sheet we're on */
private int sheetIndex = -1;
private BoundSheetRecord[] orderedBSRs;
@SuppressWarnings("unchecked")
private ArrayList boundSheetRecords = new ArrayList();

// For handling formulas with string results
private int nextRow;
private int nextColumn;
private boolean outputNextStringRecord;

private int curRow;
private List<String> rowlist;
@SuppressWarnings( "unused")
private String sheetName;

public HxlsAbstract(POIFSFileSystem fs)
throws SQLException {
this.fs = fs;
this.output = System.out;
this.minColumns = -1;
this.curRow = 0;
this.rowlist = new ArrayList<String>();
}

public HxlsAbstract(String filename) throws IOException,
FileNotFoundException, SQLException {
this(new POIFSFileSystem(new FileInputStream(filename)));
}

//excel记录行操作方法，以行索引和行元素列表为参数，对一行元素进行操作，元素为String类型
//  public abstract void optRows(int curRow, List<String> rowlist) throws SQLException ;

//excel记录行操作方法，以sheet索引，行索引和行元素列表为参数，对sheet的一行元素进行操作，元素为String类型
public abstract void optRows(int sheetIndex,int curRow, List<String> rowlist) throws Exception;

/**
* 遍历 excel 文件
*/
public void process() throws IOException {
MissingRecordAwareHSSFListener listener = new MissingRecordAwareHSSFListener(
this);
formatListener = new FormatTrackingHSSFListener(listener);

HSSFEventFactory factory = new HSSFEventFactory();
HSSFRequest request = new HSSFRequest();

if (outputFormulaValues) {
request.addListenerForAllRecords(formatListener);
} else {
workbookBuildingListener = new SheetRecordCollectingListener(
formatListener);
request.addListenerForAllRecords(workbookBuildingListener);
}

factory.processWorkbookEvents(request, fs);
}

/**
* HSSFListener 监听方法，处理 Record
*/
@SuppressWarnings("unchecked")
public void processRecord(Record record) {
int thisRow = -1;
int thisColumn = -1;
String thisStr = null;
String value = null;

switch (record.getSid()) {
case BoundSheetRecord.sid:
boundSheetRecords.add(record);
break;
case BOFRecord.sid:
BOFRecord br = (BOFRecord) record;
//进入sheet
if (br.getType() == BOFRecord.TYPE_WORKSHEET) {
// Create sub workbook if required
if (workbookBuildingListener != null && stubWorkbook == null) {
stubWorkbook = workbookBuildingListener
.getStubHSSFWorkbook();
}

// Works by ordering the BSRs by the location of
// their BOFRecords, and then knowing that we
// process BOFRecords in byte offset order
sheetIndex++;
if (orderedBSRs == null) {
orderedBSRs = BoundSheetRecord
.orderByBofPosition(boundSheetRecords);
}
sheetName = orderedBSRs[sheetIndex].getSheetname();
}
break;

case SSTRecord.sid:
sstRecord = (SSTRecord) record;
break;

case BlankRecord.sid:
BlankRecord brec = (BlankRecord) record;

thisRow = brec.getRow();
thisColumn = brec.getColumn();
thisStr = "";
break;
case BoolErrRecord.sid:
BoolErrRecord berec = (BoolErrRecord) record;

thisRow = berec.getRow();
thisColumn = berec.getColumn();
thisStr = "";
break;

case FormulaRecord.sid:
FormulaRecord frec = (FormulaRecord) record;

thisRow = frec.getRow();
thisColumn = frec.getColumn();

if (outputFormulaValues) {
if (Double.isNaN(frec.getValue())) {
// Formula result is a string
// This is stored in the next record
outputNextStringRecord = true;
nextRow = frec.getRow();
nextColumn = frec.getColumn();
} else {
thisStr = formatListener.formatNumberDateCell(frec);
}
} else {
thisStr = '"' + HSSFFormulaParser.toFormulaString(stubWorkbook,
frec.getParsedExpression()) + '"';
}
break;
case StringRecord.sid:
if (outputNextStringRecord) {
// String for formula
StringRecord srec = (StringRecord) record;
thisStr = srec.getString();
thisRow = nextRow;
thisColumn = nextColumn;
outputNextStringRecord = false;
}
break;

case LabelRecord.sid:
LabelRecord lrec = (LabelRecord) record;

curRow = thisRow = lrec.getRow();
thisColumn = lrec.getColumn();
value = lrec.getValue().trim();
value = value.equals("")?" ":value;
this.rowlist.add(thisColumn, value);
break;
case LabelSSTRecord.sid:
LabelSSTRecord lsrec = (LabelSSTRecord) record;

curRow = thisRow = lsrec.getRow();
thisColumn = lsrec.getColumn();
if (sstRecord == null) {
rowlist.add(thisColumn, " ");
} else {
value =  sstRecord
.getString(lsrec.getSSTIndex()).toString().trim();
value = value.equals("")?" ":value;
rowlist.add(thisColumn,value);
}
break;
case NoteRecord.sid:
NoteRecord nrec = (NoteRecord) record;

thisRow = nrec.getRow();
thisColumn = nrec.getColumn();
// TODO: Find object to match nrec.getShapeId()
thisStr = '"' + "(TODO)" + '"';
break;
case NumberRecord.sid:
NumberRecord numrec = (NumberRecord) record;

curRow = thisRow = numrec.getRow();
thisColumn = numrec.getColumn();
value = formatListener.formatNumberDateCell(numrec).trim();
value = value.equals("")?" ":value;
// Format
rowlist.add(thisColumn, value);
break;
case RKRecord.sid:
RKRecord rkrec = (RKRecord) record;

thisRow = rkrec.getRow();
thisColumn = rkrec.getColumn();
thisStr = '"' + "(TODO)" + '"';
break;
default:
break;
}

// 遇到新行的操作
if (thisRow != -1 && thisRow != lastRowNumber) {
lastColumnNumber = -1;
}

// 空值的操作
if (record instanceof MissingCellDummyRecord) {
MissingCellDummyRecord mc = (MissingCellDummyRecord) record;
curRow = thisRow = mc.getRow();
thisColumn = mc.getColumn();
rowlist.add(thisColumn," ");
}

// 如果遇到能打印的东西，在这里打印
if (thisStr != null) {
if (thisColumn > 0) {
output.print(',');
}
output.print(thisStr);
}

// 更新行和列的值
if (thisRow > -1)
lastRowNumber = thisRow;
if (thisColumn > -1)
lastColumnNumber = thisColumn;

// 行结束时的操作
if (record instanceof LastCellOfRowDummyRecord) {
if (minColumns > 0) {
// 列值重新置空
if (lastColumnNumber == -1) {
lastColumnNumber = 0;
}
}
// 行结束时， 调用 optRows() 方法
lastColumnNumber = -1;
try {
optRows(sheetIndex,curRow, rowlist);
} catch (Exception e) {
e.printStackTrace();
}
rowlist.clear();
}
}
}

2、创建导入接口

package com.gcloud.common.excel;

import java.util.List;

public interface HxlsOptRowsInterface {

public static final String SUCCESS="success";
/**
* 处理excel文件每行数据方法
* @param sheetIndex
* @param curRow
* @param rowlist
* @return success：成功，否则为失败原因
* @throws Exception
*/
public String optRows(int sheetIndex, int curRow, List<String> rowlist) throws Exception;
}

3、创建实现类， 在这个方法实现把导入的数据添加到数据库中

package com.gcloud.common.excel;

import java.util.List;

public class HxlsInterfaceImpl implements HxlsOptRowsInterface {

@Override
public String optRows(int sheetIndex, int curRow, List<String> datalist)
throws Exception {
//在这里执行数据的插入
//System.out.println(rowlist);
//saveData(datalist);
return "";
}
}

4、导入工具实现

package com.gcloud.common.excel;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.sql.SQLException;
import java.util.ArrayList;
import java.util.List;

/**
* excel导入工具
* Created by charlin on 2017/9/7.
*/
public class ExcelImportUtil extends HxlsAbstract{

//数据处理bean
private  HxlsOptRowsInterface hxlsOptRowsInterface;
//处理数据总数
private int optRows_sum = 0;
//处理数据成功数量
private int optRows_success = 0;
//处理数据失败数量
private int optRows_failure = 0;
//excel表格每列标题
private List<String> rowtitle ;
//失败数据
private List<List<String>> failrows;
//失败原因
private List<String> failmsgs ;
//要处理数据所在的sheet索引,从0开始
private int sheetIndex;

public ExcelImportUtil(String filename, int sheetIndex, HxlsOptRowsInterface hxlsOptRowsInterface) throws IOException,
FileNotFoundException, SQLException {
super(filename);
this.sheetIndex = sheetIndex;
this.hxlsOptRowsInterface = hxlsOptRowsInterface;
this.rowtitle = new ArrayList<String>();
this.failrows = new ArrayList<List<String>>();
this.failmsgs = new ArrayList<String>();
}

@Override
public void optRows(int sheetIndex,int curRow, List<String> rowlist) throws Exception {
/*for (int i = 0 ;i< rowlist.size();i++){
System.out.print("'"+rowlist.get(i)+"',");
}
System.out.println();*/
//将rowlist的长度补齐和标题一致
int k=rowtitle.size()-rowlist.size();
for(int i=0;i<k;i++){
rowlist.add(null);
}
if(sheetIndex == this.sheetIndex){
optRows_sum++;
if(curRow == 0){//记录标题
rowtitle.addAll(rowlist);
}else{
String result = hxlsOptRowsInterface.optRows(sheetIndex, curRow, rowlist);
if(!result.equals(hxlsOptRowsInterface.SUCCESS)){
optRows_failure++;
//失败数据
failrows.add(new ArrayList<String>(rowlist));
failmsgs.add(result);
}else{
optRows_success++;
}
}

}
}

public long getOptRows_sum() {
return optRows_sum;
}

public void setOptRows_sum(int optRows_sum) {
this.optRows_sum = optRows_sum;
}

public long getOptRows_success() {
return optRows_success;
}

public void setOptRows_success(int optRows_success) {
this.optRows_success = optRows_success;
}

public long getOptRows_failure() {
return optRows_failure;
}

public void setOptRows_failure(int optRows_failure) {
this.optRows_failure = optRows_failure;
}

public List<String> getRowtitle() {
return rowtitle;
}

public List<List<String>> getFailrows() {
return failrows;
}

public List<String> getFailmsgs() {
return failmsgs;
}

public void setFailmsgs(List<String> failmsgs) {
this.failmsgs = failmsgs;
}
}

5、导入实现方法：

public static void main(String[] args){
ExcelImportUtil importUtil;
try {
importUtil = new ExcelImportUtil("d:/data.xls",0, new HxlsInterfaceImpl());
importUtil.process();
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
} catch (SQLException e) {
e.printStackTrace();
}
}

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