MyBatis:将字符串映射为布尔值

import org.apache.ibatis.type.BaseTypeHandler;
import org.apache.ibatis.type.JdbcType;
import import java.sql.CallableStatement;
import import java.sql.PreparedStatement;
import import java.sql.ResultSet;
import import java.sql.SQLException;

public class StringToBooleanTypeHandler extends BaseTypeHandler<Boolean> {

    @Override
    public void setNonNullParameter(PreparedStatement preparedStatement, int i, Boolean aBoolean, JdbcType jdbcType) throws SQLException {
        preparedStatement.setString(i, aBoolean ? "true" : "false");
    }

    @Override
    public Boolean getNullableResult(ResultSet resultSet, String s) throws SQLException {
        String value = resultSet.getString(s);
        return "true".equals(value);
    }

    @Override
    public Boolean getNullableResult(ResultSet resultSet, int i) throws SQLException {
        String value = resultSet.getString(i);
        return "true".equals(value);
    }

    @Override
    public Boolean getNullableResult(CallableStatement callableStatement, int i) throws SQLException {
        String value = callableStatement.getString(i);
        return "true".equals(value);
    }
}

<typeHandlers>
    <typeHandler handler="com.example.StringToBooleanTypeHandler" javaType="java.lang.Boolean" jdbcType="VARCHAR"/>
</typeHandlers>