其他開發者已經評論過這類問題。
我從GitHub評論引述:
@nglsatheesh的MyBatis無法施展/除非你告訴它如何轉換的類型。 您只需要一個簡單的自定義類型處理程序。
public class StrToIntTypeHandler implements TypeHandler<String> {
@Override
public void setParameter(PreparedStatement ps, int i,
String parameter, JdbcType jdbcType) throws SQLException {
ps.setInt(i, Integer.parseInt(parameter));
}
// other methods are for binding query results.
}
SELECT * FROM表名其中id =#{值,類型控制器= StrToIntTypeHandler}
所以,現在,如果你將創建一個這樣的自定義類型處理器:
public class Null2DateTypeHandler implements TypeHandler<Date> {
@Override
public void setParameter(PreparedStatement ps, int i, java.util.Date parameter, JdbcType jdbcType) throws SQLException {
System.err.println(String.format("ps: %s, i: %d, param: %s, type: %s", ps.toString(), i, parameter, jdbcType.toString()));
if (parameter == null) {
ps.setDate(i, null); // ??? I'm not sure. But it works.
} else {
ps.setDate(i, new java.sql.Date(parameter.getTime()));
}
}
}
而且,映射器方:
@Select({
"<script>"
, "SELECT * FROM `employees` WHERE `hire_date` "
, " BETWEEN
, " #{dateFrom,typeHandler=*.*.*.Null2DateTypeHandler}"
, " AND"
, " #{dateTo,typeHandler=*.*.*.Null2DateTypeHandler}"
,"</script>"
})
@Results({
@Result(property = "empNo", column = "emp_no"),
@Result(property = "birthDate", column = "birth_date"),
@Result(property = "firstName", column = "first_name"),
@Result(property = "lastName", column = "last_name"),
@Result(property = "gender", column = "gender"),
@Result(property = "hireDate", column = "hire_date")
})
List<Employees> selectBetweenTypeHandler(@Param("dateFrom") Date dateFrom, @Param("dateTo") Date dateTo);
我的日誌記錄,它看起來工作正常。
DEBUG [main] - ==> Preparing: SELECT * FROM `employees` WHERE `hire_date` BETWEEN ? AND ?
ps: [email protected], i: 1, param: null, type: OTHER
DEBUG [main] - ==> Parameters: null, null
ps: [email protected], i: 2, param: null, type: OTHER
DEBUG [main] - <== Total: 0