Mybatis实现自定义类型转换器TypeHandler的方法

public class XmltypeTypeHandler implements TypeHandler<String>

public void setParameter(PreparedStatement ps, int i, String parameter, JdbcType jdbcType) public String getResult(ResultSet rs, String columnName) throws SQLException
public String getResult(ResultSet rs, int columnIndex) throws SQLException
public String getResult(CallableStatement cs, int columnIndex) throws SQLException

<typeHandlers>
<typeHandler javaType="string" jdbcType="UNDEFINED" handler="com.tyyd.dw.context.XmltypeTypeHandler"/>
</typeHandlers>

insert into T_Content(
<include refid="fullColumns"/>
) values (
#{controlId,jdbcType=BIGINT},
#{xmlFile,javaType=string,jdbcType=UNDEFINED,typeHandler=com.tyyd.dw.context.XmltypeTypeHandler},
#{drmFile,jdbcType=BLOB}
)

/**
* oracle SYS.XMLTYPE 类型自定义处理器
* 
* User: liyd
* Date: 13-12-27
* Time: 下午4:53
*/
public class XmltypeTypeHandler implements TypeHandler<String> {
@Override
public void setParameter(PreparedStatement ps, int i, String parameter, JdbcType jdbcType)
throws SQLException {
//防止为null时，创建XMLType出现错误
if (StringUtils.isNotBlank(parameter)) {
DelegatingConnection connection = (DelegatingConnection) ps.getConnection()
.getMetaData().getConnection();
XMLType xmltype = XMLType.createXML(connection.getDelegate(), parameter);
ps.setObject(i, xmltype);
} else {
ps.setString(i, null);
}
}
@Override
public String getResult(ResultSet rs, String columnName) throws SQLException {
//数据库sql查询时xmltype字段使用xmltype.getclobval()返回
return rs.getString(columnName);
}
@Override
public String getResult(ResultSet rs, int columnIndex) throws SQLException {
return rs.getString(columnIndex);
}
@Override
public String getResult(CallableStatement cs, int columnIndex) throws SQLException {
return cs.getString(columnIndex);
}
}