package org.sxkj.common.handler;
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import org.apache.ibatis.type.BaseTypeHandler;
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import org.apache.ibatis.type.JdbcType;
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import org.apache.ibatis.type.MappedJdbcTypes;
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import org.apache.ibatis.type.MappedTypes;
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import java.sql.CallableStatement;
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import java.sql.PreparedStatement;
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import java.sql.ResultSet;
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import java.sql.SQLException;
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/**
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* String 与 smallint/int 的类型转换处理器
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* 用于 Java 字段为 String 但数据库列为 smallint/int 的场景
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* 写入时将 String 转为 Integer，读取时将 Integer 转为 String
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*/
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@MappedTypes(String.class)
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@MappedJdbcTypes(JdbcType.SMALLINT)
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public class StringToIntegerTypeHandler extends BaseTypeHandler<String> {
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@Override
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public void setNonNullParameter(PreparedStatement ps, int i, String parameter, JdbcType jdbcType) throws SQLException {
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ps.setInt(i, Integer.parseInt(parameter));
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}
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@Override
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public String getNullableResult(ResultSet rs, String columnName) throws SQLException {
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Object value = rs.getObject(columnName);
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return value == null ? null : value.toString();
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}
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@Override
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public String getNullableResult(ResultSet rs, int columnIndex) throws SQLException {
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Object value = rs.getObject(columnIndex);
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return value == null ? null : value.toString();
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}
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@Override
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public String getNullableResult(CallableStatement cs, int columnIndex) throws SQLException {
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Object value = cs.getObject(columnIndex);
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return value == null ? null : value.toString();
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}
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}
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