增加：LC_SINGLE模型

smtweb-framework/core/src/main/java/cc/smtweb/framework/core/db/dao/AbstractEntityDao.java

@@ -12,6 +12,7 @@ import cc.smtweb.framework.core.db.vo.ModelField;
 import cc.smtweb.framework.core.db.vo.ModelTable;
 import cc.smtweb.framework.core.exception.DbException;
 import cc.smtweb.framework.core.util.DateUtil;
+import cc.smtweb.framework.core.util.NumberUtil;
 import cc.smtweb.framework.core.util.SpringUtil;
 import cc.smtweb.framework.core.util.VariableUtil;
 import com.esotericsoftware.minlog.Log;
@@ -388,7 +389,10 @@ public abstract class AbstractEntityDao<T> {
     public Long readId(T entity) {
         EntityColumn idColumn = findIdColumn();
 
-        return (Long) idColumn.readValue(entity);
+        Object o = idColumn.readValue(entity);
+        if (o == null) return 0L;
+        if (o instanceof Number) return ((Number) o).longValue();
+        return NumberUtil.getLongIgnoreErr(o.toString());
     }
 
     public T createBean() {