save exception

pom.xml

src/main/java/com/ic/er/Attribute.java

src/main/java/com/ic/er/ER.java

src/main/java/com/ic/er/Entity.java

src/main/java/com/ic/er/Exception/ERException.java

src/main/java/com/ic/er/Relationship.java

src/main/java/com/ic/er/View.java

src/main/java/com/ic/er/common/RelatedObjType.java

src/main/java/com/ic/er/common/Trans.java

src/main/java/com/ic/er/dao/AttributeMapper.java

src/main/java/com/ic/er/dao/EntityMapper.java

src/main/java/com/ic/er/dao/GraphInfoMapper.java

src/main/java/com/ic/er/dao/RelationshipMapper.java

src/main/java/com/ic/er/dao/ViewMapper.java

src/main/java/com/ic/er/entity/AttributeDO.java

src/main/java/com/ic/er/entity/EntityDO.java

src/main/java/com/ic/er/entity/GraphInfoDO.java

src/main/java/com/ic/er/entity/RelationshipDO.java

src/main/java/com/ic/er/entity/ViewDO.java

src/main/resources/mapper/AttributeMapper.xml