导入excel util
1 /**
2 * @Description: excel导入工具类
3
4 * @Author: hg
5
6 * @CreateDate: 2019/6/4 11:58
7
8 */
9 @SuppressWarnings("all")
10 public class POIUtil<T> {
11
12 private Logger logger = LoggerFactory.getLogger(this.getClass());
13
14 private Workbook wb;
15
16 private String[] property;
17
18 private Class<T> c;
19
20 private String filePath;
21
22 private int startRow;
23
24 private int startColumn;
25
26 //是否需要hash
27 private boolean isHash = false;
28
29 //存放hash集合
30 private HashSet<Integer> hashSet;
31
32 private CopyOnWriteArrayList beanList;
33
34 public CopyOnWriteArrayList getBeanList() {
35 return beanList;
36 }
37
38 public POIUtil(String[] property, Class<T> c, String filePath, int startRow, int startColumn) {
39 this.property = property;
40 this.c = c;
41 this.filePath = filePath;
42 this.wb = getWorkbook(filePath);
43 this.startRow = startRow;
44 this.startColumn = startColumn;
45 this.beanList = new CopyOnWriteArrayList();
46 }
47
48 /**
49 * @Description:
50 * @Param: [property 类的属性字符串数组, c class对下你给, filePath excel地址,
51 * startRow 开始行, startColumn 开始列, hashSet 不需要必填，hash校验]
52 * @return:
53 * @Author: hg
54 * @Date: 2019/6/4
55 */
56 public POIUtil(String[] property, Class<T> c, String filePath, int startRow, int startColumn, HashSet<Integer> hashSet) {
57 this.property = property;
58 this.c = c;
59 this.filePath = filePath;
60 this.wb = getWorkbook(filePath);
61 this.startRow = startRow;
62 this.startColumn = startColumn;
63 this.hashSet = hashSet;
64 this.isHash = true;
65 this.beanList = new CopyOnWriteArrayList();
66 }
67
68 /**
69 * @Description:
70 * @Param: [startSheet sheet开始, endSheet sheet结束]
71 * @return: void
72 * @Author: hg
73 * @Date: 2019/6/4
74 */
75 public void getBeanList(int startSheet, int endSheet) throws IllegalAccessException, InstantiationException, InvocationTargetException {
76 HashMap<String, String> valueMap = new HashMap<>();
77 for (int sheetNum = startSheet; sheetNum < endSheet; sheetNum++) {
78 Sheet sheet = wb.getSheetAt(sheetNum);
79 for (int rowNum = startRow; rowNum < sheet.getPhysicalNumberOfRows(); rowNum++) {
80 Row row = sheet.getRow(rowNum);
81 for (int i = 0, columnNum = startColumn; i < property.length; i++, columnNum++) {
82 Cell cell = row.getCell(columnNum);
83 valueMap.put(property[i], getCellValue(cell, cell.getCellType()));
84 }
85 //这里使用clone效率更高
86 T t = c.newInstance();
87 BeanUtils.populate(t, valueMap);
88
89 //校验非空值
90 try {
91 ValidatorUtils.validateEntity(t);
92 } catch (WLHSEException e) {
93 continue;
94 }
95
96 //hash校验
97 if (isHash) {
98 synchronized (hashSet) {
99 if (hashSet.contains(t.hashCode()))
100 continue;
101 hashSet.add(t.hashCode());
102 }
103 }
104 beanList.add(t);
105 }
106 }
107 }
108
109 private Workbook getWorkbook(String filePath) {
110 Workbook wb = null;
111 try {
112 if (null != filePath) {
113 FileInputStream fis = new FileInputStream(filePath);
114 if (filePath.endsWith(".xls")) {
115 wb = new HSSFWorkbook(fis);
116 } else if (filePath.endsWith(".xlsx")) {
117 wb = new XSSFWorkbook(fis);
118 }
119 return wb;
120 }
121 } catch (Exception e) {
122 logger.error(e.getMessage(), e);
123 }
124 return null;
125 }
126
127 private String getCellValue(Cell rowCell, int rowCellType) {
128 String value = "";
129 switch (rowCellType) {
130 case Cell.CELL_TYPE_STRING:
131 value = rowCell.getStringCellValue();
132 break;
133 case Cell.CELL_TYPE_NUMERIC:
134 String dataFormat = rowCell.getCellStyle().getDataFormatString();
135 AtomicReference<Boolean> isDate = new AtomicReference<>(false);
136 if (DateUtil.isCellDateFormatted(rowCell)) {
137 value = new SimpleDateFormat("yyyy-MM-dd").format(DateUtil.getJavaDate(rowCell.getNumericCellValue()));
138 } else if (DateUtil.isCellInternalDateFormatted(rowCell)) {
139 value = new SimpleDateFormat("yyyy-MM-dd").format(DateUtil.getJavaDate(rowCell.getNumericCellValue()));
140 } else if (isDate.get()) {
141 value = new SimpleDateFormat("yyyy-MM-dd").format(rowCell.getDateCellValue());
142 } else if (dataFormat == null) {
143 value = new SimpleDateFormat("yyyy-MM-dd").format(DateUtil.getJavaDate(rowCell.getNumericCellValue()));
144 } else {
145 if (dataFormat != null) {
146 value = String.valueOf(rowCell.getNumericCellValue());
147 } else {
148 if (rowCell.getCellStyle().getDataFormatString().contains("$")) {
149 value = "$" + rowCell.getNumericCellValue();
150 } else if (rowCell.getCellStyle().getDataFormatString().contains("￥")) {
151 value = "￥" + rowCell.getNumericCellValue();
152 } else if (rowCell.getCellStyle().getDataFormatString().contains("¥")) {
153 value = "¥" + rowCell.getNumericCellValue();
154 } else if (rowCell.getCellStyle().getDataFormatString().contains("€")) {
155 value = "€" + String.valueOf(rowCell.getNumericCellValue());
156 } else {
157 value = String.valueOf(rowCell.getNumericCellValue());
158 }
159 }
160 }
161 break;
162 case Cell.CELL_TYPE_BOOLEAN:
163 value = String.valueOf(rowCell.getBooleanCellValue());
164 break;
165 case Cell.CELL_TYPE_ERROR:
166 value = ErrorEval.getText(rowCell.getErrorCellValue());
167 break;
168 case Cell.CELL_TYPE_FORMULA:
169 value = rowCell.getCellFormula();
170 break;
171 }
172 return value;
173 }
174
175 public Workbook getWb() {
176 return wb;
177 }
178 }
导入excel线程
1 public class POIThread implements Runnable {
2 private int startSheet;
3 private int endSheet;
4 private POIUtil util;
5 private CountDownLatch countDownLatch;
6
7
8 POIThread(int startSheet, int endSheet, POIUtil util, CountDownLatch countDownLatch) {
9 this.startSheet = startSheet;
10 this.endSheet = endSheet;
11 this.util = util;
12 this.countDownLatch = countDownLatch;
13 }
14
15 @Override
16 public void run() {
17 try {
18 util.getBeanList(startSheet, endSheet);
19 } catch (IllegalAccessException | InstantiationException | InvocationTargetException e) {
20 e.printStackTrace();
21 } finally {
22 countDownLatch.countDown();
23 }
24 }
25 }
执行线程
1 public class POIThreadHelper {
2 public void work(POIUtil util) {
3 //一个sheet分配一个线程
4 int runSize = util.getWb().getNumberOfSheets();
5
6 ExecutorService executor = Executors.newFixedThreadPool(runSize);
7 CountDownLatch countDownLatch = new CountDownLatch(runSize);
8
9 for (int i = 0; i < runSize; i++) {
10 executor.execute(new POIThread(i, i + 1, util,countDownLatch));
11 }
12
13 try {
14 countDownLatch.await();
15 } catch (InterruptedException e) {
16 e.printStackTrace();
17 }
18 executor.shutdown();
19 }
20 }
测试
1 @Test
2 public void test1() throws IllegalAccessException, InvocationTargetException, InstantiationException {
3 String path = "C:\\logs\\test.xls";
4 String[] test = {"name", "sex"};
5 POIUtil<Student> poiUtil = new POIUtil<Student>(test, Student.class, path, 1, 0);
6 POIThreadHelper helper = new POIThreadHelper();
7 helper.work(poiUtil);
8 for (Object o : poiUtil.getBeanList()) {
9 System.out.println(o.toString());
10 }
11 }
结果
来源：https://www.cnblogs.com/Gang-Bryant/p/10972818.html