目标：读取execl的第一个sheet，并传入不需要读取的表头的行数，返回该execl里所有数据的list
解析共有2种：1、DOM 2、SAX
1 import java.io.File;
2 import java.io.IOException;
3 import java.io.InputStream;
4 import java.text.DecimalFormat;
5 import java.util.ArrayList;
6 import java.util.Iterator;
7 import java.util.List;
8 import java.util.regex.Matcher;
9 import java.util.regex.Pattern;
10
11 import org.apache.commons.logging.Log;
12 import org.apache.commons.logging.LogFactory;
13 import org.apache.poi.openxml4j.exceptions.InvalidFormatException;
14 import org.apache.poi.openxml4j.exceptions.OpenXML4JException;
15 import org.apache.poi.openxml4j.opc.OPCPackage;
16 import org.apache.poi.ss.usermodel.Cell;
17 import org.apache.poi.ss.usermodel.Row;
18 import org.apache.poi.ss.usermodel.Sheet;
19 import org.apache.poi.ss.usermodel.Workbook;
20 import org.apache.poi.ss.usermodel.WorkbookFactory;
21 import org.apache.poi.xssf.eventusermodel.XSSFReader;
22 import org.apache.poi.xssf.model.SharedStringsTable;
23 import org.apache.poi.xssf.usermodel.XSSFRichTextString;
24 import org.xml.sax.Attributes;
25 import org.xml.sax.ContentHandler;
26 import org.xml.sax.InputSource;
27 import org.xml.sax.SAXException;
28 import org.xml.sax.XMLReader;
29 import org.xml.sax.helpers.DefaultHandler;
30 import org.xml.sax.helpers.XMLReaderFactory;
31
32 /**
33 * 基于XSSF and SAX (Event API)
34 * 读取excel的第一个Sheet的内容
35 * @author yzl
36 *
37 */
38 public class ReadExcelUtils {
39 private int headCount = 0;
40 private List<List<String>> list = new ArrayList<List<String>>();
41 private static final Log log = LogFactory.getLog(ReadExcelUtils.class);
42
43 /**
44 * 通过文件流构建DOM进行解析
45 * @param ins
46 * @param headRowCount
47 * @return
48 * @throws InvalidFormatException
49 * @throws IOException
50 */
51 public List<List<String>> processDOMReadSheet(InputStream ins,int headRowCount) throws InvalidFormatException, IOException {
52 Workbook workbook = WorkbookFactory.create(ins);
53 return this.processDOMRead(workbook, headCount);
54 }
55
56 /**
57 * 采用DOM的形式进行解析
58 * @param filename
59 * @param headRowCount
60 * @return
61 * @throws IOException
62 * @throws InvalidFormatException
63 * @throws Exception
64 */
65 public List<List<String>> processDOMReadSheet(String filename,int headRowCount) throws InvalidFormatException, IOException {
66 Workbook workbook = WorkbookFactory.create(new File(filename));
67 return this.processDOMRead(workbook, headCount);
68 }
69
70 /**
71 * 采用SAX进行解析
72 * @param filename
73 * @param headRowCount
74 * @return
75 * @throws OpenXML4JException
76 * @throws IOException
77 * @throws SAXException
78 * @throws Exception
79 */
80 public List<List<String>> processSAXReadSheet(String filename,int headRowCount) throws IOException, OpenXML4JException, SAXException {
81 headCount = headRowCount;
82
83 OPCPackage pkg = OPCPackage.open(filename);
84 XSSFReader r = new XSSFReader( pkg );
85 SharedStringsTable sst = r.getSharedStringsTable();
86 XMLReader parser = fetchSheetParser(sst);
87
88 Iterator<InputStream> sheets = r.getSheetsData();
89 InputStream sheet = sheets.next();
90 InputSource sheetSource = new InputSource(sheet);
91 parser.parse(sheetSource);
92 sheet.close();
93
94 log.debug("时间:"+DateUtils.getNowTime()+",共读取了execl的记录数为 :"+list.size());
95
96 return list;
97 }
98
99 private XMLReader fetchSheetParser(SharedStringsTable sst) throws SAXException {
100 XMLReader parser =
101 XMLReaderFactory.createXMLReader(
102 "org.apache.xerces.parsers.SAXParser"
103 );
104 ContentHandler handler = new SheetHandler(sst);
105 parser.setContentHandler(handler);
106 return parser;
107 }
108
109 /**
110 * SAX 解析excel
111 */
112 private class SheetHandler extends DefaultHandler {
113 private SharedStringsTable sst;
114 private String lastContents;
115 private boolean nextIsString;
116 private boolean isNullCell;
117 //读取行的索引
118 private int rowIndex = 0;
119 //是否重新开始了一行
120 private boolean curRow = false;
121 private List<String> rowContent;
122
123 private SheetHandler(SharedStringsTable sst) {
124 this.sst = sst;
125 }
126
127 public void startElement(String uri, String localName, String name,
128 Attributes attributes) throws SAXException {
129 //节点的类型
130 //System.out.println("---------begin:" + name);
131 if(name.equals("row")){
132 rowIndex++;
133 }
134 //表头的行直接跳过
135 if(rowIndex > headCount){
136 curRow = true;
137 // c => cell
138 if(name.equals("c")) {
139 String cellType = attributes.getValue("t");
140 if(null == cellType){
141 isNullCell = true;
142 }else{
143 if(cellType.equals("s")) {
144 nextIsString = true;
145 } else {
146 nextIsString = false;
147 }
148 isNullCell = false;
149 }
150 }
151 // Clear contents cache
152 lastContents = "";
153 }
154 }
155
156 public void endElement(String uri, String localName, String name)
157 throws SAXException {
158 //System.out.println("-------end："+name);
159 if(rowIndex > headCount){
160 if(nextIsString) {
161 int idx = Integer.parseInt(lastContents);
162 lastContents = new XSSFRichTextString(sst.getEntryAt(idx)).toString();
163 nextIsString = false;
164 }
165 if(name.equals("v")) {
166 //System.out.println(lastContents);
167 if(curRow){
168 //是新行则new一行的对象来保存一行的值
169 if(null==rowContent){
170 rowContent = new ArrayList<String>();
171 }
172 rowContent.add(lastContents);
173 }
174 }else if(name.equals("c") && isNullCell){
175 if(curRow){
176 //是新行则new一行的对象来保存一行的值
177 if(null==rowContent){
178 rowContent = new ArrayList<String>();
179 }
180 rowContent.add(null);
181 }
182 }
183
184 isNullCell = false;
185
186 if("row".equals(name)){
187 list.add(rowContent);
188 curRow = false;
189 rowContent = null;
190 }
191 }
192
193 }
194
195 public void characters(char[] ch, int start, int length)
196 throws SAXException {
197 lastContents += new String(ch, start, length);
198 }
199 }
200
201 /**
202 * DOM的形式解析execl
203 * @param workbook
204 * @param headRowCount
205 * @return
206 * @throws InvalidFormatException
207 * @throws IOException
208 */
209 private List<List<String>> processDOMRead(Workbook workbook,int headRowCount) throws InvalidFormatException, IOException {
210 headCount = headRowCount;
211
212 Sheet sheet = workbook.getSheetAt(0);
213 //行数
214 int endRowIndex = sheet.getLastRowNum();
215
216 Row row = null;
217 List<String> rowList = null;
218
219 for(int i=headCount; i<=endRowIndex; i++){
220 rowList = new ArrayList<String>();
221 row = sheet.getRow(i);
222 for(int j=0; j<row.getLastCellNum();j++){
223 if(null==row.getCell(j)){
224 rowList.add(null);
225 continue;
226 }
227 int dataType = row.getCell(j).getCellType();
228 if(dataType == Cell.CELL_TYPE_NUMERIC){
229 DecimalFormat df = new DecimalFormat("0.####################");
230 rowList.add(df.format(row.getCell(j).getNumericCellValue()));
231 }else if(dataType == Cell.CELL_TYPE_BLANK){
232 rowList.add(null);
233 }else if(dataType == Cell.CELL_TYPE_ERROR){
234 rowList.add(null);
235 }else{
236 //这里的去空格根据自己的情况判断
237 String valString = row.getCell(j).getStringCellValue();
238 Pattern p = Pattern.compile("\\s*|\t|\r|\n");
239 Matcher m = p.matcher(valString);
240 valString = m.replaceAll("");
241 //去掉狗日的不知道是啥东西的空格
242 if(valString.indexOf(" ")!=-1){
243 valString = valString.substring(0, valString.indexOf(" "));
244 }
245
246 rowList.add(valString);
247 }
248 }
249
250 list.add(rowList);
251 }
252 log.debug("时间:"+DateUtils.getNowTime()+",共读取了execl的记录数为 :"+list.size());
253
254 return list;
255 }
256
257 @SuppressWarnings("unused")
258 public static void main(String[] args) throws Exception {
259 ReadExcelUtils howto = new ReadExcelUtils();
260 String fileName = "f:/test.xlsx";
261 List<List<String>> list = howto.processSAXReadSheet(fileName,2);
262
263 ReadExcelUtils h = new ReadExcelUtils();
264 String fileName1 = "f:/test.xls";
265 List<List<String>> result = h.processDOMReadSheet(fileName1,2);
266 }
267 }
时间： 2024-10-12 08:49:18