[task-906]增加按角色代理选项，代理后代理人将接收到对应角色的事务，同时拥有对应角色的权限

ibps-bpmnbase-root/modules/bpmn-model/src/main/java/com/lc/ibps/bpmn/persistence/handler/StringListTypeHandler.java

@@ -29,7 +29,7 @@ public class StringListTypeHandler extends BaseTypeHandler<List<String>> {
             throws SQLException {
 
         String sqlJson = rs.getString(columnName);
-        if (null != sqlJson){
+        if (StringUtils.isNotBlank(sqlJson)){
             return Arrays.asList(sqlJson.split(StringPool.COMMA));
         }
         return null;
@@ -40,8 +40,8 @@ public class StringListTypeHandler extends BaseTypeHandler<List<String>> {
     public List<String> getNullableResult(ResultSet rs, int columnIndex)
             throws SQLException {
         String sqlJson = rs.getString(columnIndex);
-        if (null != sqlJson){
-            return Arrays.asList(sqlJson.split(","));
+        if (StringUtils.isNotBlank(sqlJson)){
+            return Arrays.asList(sqlJson.split(StringPool.COMMA));
         }
         return null;
     }
@@ -51,8 +51,8 @@ public class StringListTypeHandler extends BaseTypeHandler<List<String>> {
     public List<String> getNullableResult(CallableStatement cs, int columnIndex)
             throws SQLException {
         String sqlJson = cs.getString(columnIndex);
-        if (null != sqlJson){
-            return Arrays.asList(sqlJson.split(","));
+        if (StringUtils.isNotBlank(sqlJson)){
+            return Arrays.asList(sqlJson.split(StringPool.COMMA));
         }
         return null;
     }