处理数据源为空引起的空指针问题

Author: MatrixSeven

ExcelReads.jar

@@ -74,4 +74,9 @@ public SaveExcelObject FilterCol(DataFilterColumnInterface df) {
         }
         return this;
     }
+    protected void checkData() throws Exception {
+        if (this.list.isEmpty()) {
+            throw new Exception("数据为空，请检查数据源");
+        }
+    }
 }

src/main/java/seven/savewapper/wapperRef/SaveExcelObject.java

@@ -44,6 +44,7 @@ public ResExprotMap(ResultSet resultSet, String path) {
     public void Save() throws Exception {
         Workbook wk = ExcelTool.newInstance(path, true);
         OutputStream out = new FileOutputStream(path);
+        checkData();
         if (c != null) {
             list.sort(c);
         }

src/main/java/seven/savewapper/wapperRef/sysWppers/ResExprotMap.java

@@ -44,6 +44,7 @@ public ResExprotObj(ResultSet resultSet, String path) {
     public void Save() throws Exception {
         Workbook wk = ExcelTool.newInstance(path, true);
         OutputStream out = new FileOutputStream(path);
+        checkData();
         Class<?> clazz = list.get(0).getClass();
         Field[] fields = ExcelTool.GetFilesDeep(clazz);
         String[] title = new String[fields.length];