add readExcel for "NO fields"

pom.xml

@@ -10,6 +10,11 @@
     <build>
         <sourceDirectory>src</sourceDirectory>
         <testSourceDirectory>test</testSourceDirectory>
+        <resources>
+            <resource>
+                <directory>res</directory>
+            </resource>
+        </resources>
         <plugins>
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>

src/com/lxyer/excel/poi/ExcelKit.java

@@ -232,15 +232,31 @@ public class ExcelKit {
 		return readExcel(file, fields, -1, null);
 	}
 
+	//read excel sheet[0] no fields
+	public static List<Map> readExcel(File file) throws IOException {
+		return readExcel(file, null, -1, null);
+	}
+
+	//read excel by sheetName
 	public static List<Map> readExcel(File file, String[] fields, String sheetName) throws IOException {
 		return readExcel(file, fields, -1, sheetName);
 	}
 
+	//read excel by sheetName no fields
+	public static List<Map> readExcel(File file, String sheetName) throws IOException {
+		return readExcel(file, null, -1, sheetName);
+	}
+
 	//read excel all sheet
 	public static Map<String, List<Map>> readExcelAll(File file, String[] fields) throws IOException {
 		return readExcelAll(file, fields, -1);
 	}
 
+	//read all excel no fields
+	public static Map<String, List<Map>> readExcelAll(File file) throws IOException {
+		return readExcelAll(file, null, -1);
+	}
+
 	//read excel sheet[0]
 	private static List<Map> readExcel(File file, String[] fields, int lastRowNum, String sheetName) throws IOException {
 		Workbook wk;
@@ -291,6 +307,10 @@ public class ExcelKit {
 	 * @author Lxyer 2016/8/1 10:32.
 	 */
 	private static List<Map> readExcel(Sheet sheet, String[] fields, int lastRowNum) throws OfficeXmlFileException {
+		if (fields == null || fields.length == 0){
+			return readExcel(sheet, lastRowNum);
+		}
+
 		List<Map> list = new ArrayList<>();
 		if (lastRowNum < 0 || lastRowNum > sheet.getLastRowNum()){
 			lastRowNum = sheet.getLastRowNum();
@@ -315,8 +335,7 @@ public class ExcelKit {
 					continue;
 				}
 
-				int cellType = cell.getCellType();
-				if (cellType == 0){
+				if (cell.getCellTypeEnum() == CellType.NUMERIC){
 					map.put(fields[j], (long)cell.getNumericCellValue()+"");
 				}else {
 					map.put(fields[j], cell.getStringCellValue());
@@ -327,6 +346,48 @@ public class ExcelKit {
 		return list;
 	}
 
+	/**
+	 *
+	 * @author Lxyer 2016/9/21 00:38.
+	 */
+	private static List<Map> readExcel(Sheet sheet, int lastRowNum) throws OfficeXmlFileException {
+		List<Map> list = new ArrayList<>();
+		if (lastRowNum < 0 || lastRowNum > sheet.getLastRowNum()){
+			lastRowNum = sheet.getLastRowNum();
+		}
+
+		int t = 0;
+		r:for (int i=0; i<=lastRowNum; i++){
+			Row row = sheet.getRow(i);
+			if (row == null) continue ;
+			short cellNum = row.getLastCellNum();
+			//空跳过/连续三行为空结束
+			if (isEmptyRow(row, 3)) {
+				if (t++ > 3) break;
+				continue ;
+			}
+
+			Map map = new HashMap();
+			for (int j=0; j < cellNum; j++){
+				String field = (char)((j/26 ==0? ' ' : 'a')+j/26) + "" +(char)('a'+j%26);
+				field = field.replace(" ","");
+				Cell cell = row.getCell(j);
+				if (cell == null){
+					map.put(field, "");
+					continue;
+				}
+
+				if (cell.getCellTypeEnum() == CellType.NUMERIC){
+					map.put(field, (long)cell.getNumericCellValue()+"");
+				}else {
+					map.put(field, cell.getStringCellValue());
+				}
+			}
+			list.add(map);
+		}
+		return list;
+	}
+
 	//空跳过/连续三行为空结束
 	private static boolean isEmptyRow(Row row, int len){
 		for (int i = 0; i< row.getLastCellNum() && i < len; i++) {

test/com/lxyer/excel/ExcelKitTest.java

@@ -0,0 +1,47 @@
+package com.lxyer.excel;
+
+import com.lxyer.excel.poi.ExcelKit;
+import org.junit.Test;
+
+import java.io.File;
+import java.io.IOException;
+import java.util.List;
+import java.util.Map;
+
+/**
+ * @author: liangxianyou at 2018/9/15 7:52.
+ */
+public class ExcelKitTest {
+
+    //read excel by fields
+    @Test
+    public void readTest() throws IOException {
+        /*String sql1 = "select a, b, c from Sheet1";
+        String sql2 = "select a, b, c from Sheet1 where a=1 order by b";
+        String sql3 = "select a, b, c from Sheet1 s1, Sheet2 s2 order by";
+        String sql4 = "select a, b, c from Sheet1 s1, Sheet2 s2 where order by";
+        String select = sql1.substring(0,sql1.indexOf("from")).replace("select", "").replace(" ", "");
+
+        System.out.println(sql1.substring(0,sql1.indexOf("from")).replace("select", "").replace(" ", ""));
+        */
+
+        String[] fields ={"a", "b", "c"};
+        File file = new File("res/test.xlsx");
+        List<Map> list = ExcelKit.readExcel(file, fields);
+        System.out.println(list.size());
+
+    }
+
+    //read excel no fields
+    @Test
+    public void readTest2() throws IOException {
+        List<Map> list = ExcelKit.readExcel(new File("res/test.xlsx"));
+
+        list.forEach(x->{
+            x.forEach((k,v)->{
+                System.out.println(String.format("%s:%s", k, v));
+            });
+        });
+    }
+
+}