在从客户端向服务器端导入Excel的时候，需要与预设的XSD文档进行匹配。

有的时候在修改一列之后会提示一下错误：

<errors>
  <error column="739" line="2">cvc-minLength-valid: Value '' with length = '0' is not facet-valid with respect to minLength '1' for type 'string_type'.</error>
  <error column="739" line="2">cvc-type.3.1.3: The value '' of element 'col_16' is not valid.</error>
  <error column="1112" line="2">cvc-minLength-valid: Value '' with length = '0' is not facet-valid with respect to minLength '1' for type 'string_type'.</error>
  <error column="1112" line="2">cvc-type.3.1.3: The value '' of element 'col_16' is not valid.</error>
  <error column="1488" line="2">cvc-minLength-valid: Value '' with length = '0' is not facet-valid with respect to minLength '1' for type 'string_type'.</error>
  <error column="1488" line="2">cvc-type.3.1.3: The value '' of element 'col_16' is not valid.</error>
  <error column="1861" line="2">cvc-minLength-valid: Value '' with length = '0' is not facet-valid with respect to minLength '1' for type 'string_type'.</error>
  <error column="1861" line="2">cvc-type.3.1.3: The value '' of element 'col_16' is not valid.</error>
  <error column="2234" line="2">cvc-minLength-valid: Value '' with length = '0' is not facet-valid with respect to minLength '1' for type 'string_type'.</error>
  <error column="2234" line="2">cvc-type.3.1.3: The value '' of element 'col_16' is not valid.</error>
  <error column="2610" line="2">cvc-minLength-valid: Value '' with length = '0' is not facet-valid with respect to minLength '1' for type 'string_type'.</error>
  <error column="2610" line="2">cvc-type.3.1.3: The value '' of element 'col_16' is not valid.</error>

以上提示的错误解决办法是：

在输入的数据中的最小长度和XSD中要求的最短长度是不符的。

解决方法：

在XSD文件中新定义数据类型将其最小长度设置为客户端要求的最短长度，相应的列使用该类型：

例如：

<xs:simpleType name="string_cifcode">
  <xs:restriction base="xs:string">
   <xs:minLength value="0"/>
  </xs:restriction>
 </xs:simpleType>