如何使用映射管理器将java.sql.Date存储在cassandra日期字段中？

有人能帮我用Java将当前系统日期以

yyyy-mm-dd

格式存储在cassandra日期列中吗？使用

MappingManager

保存

java.sql.Date

时出现异常

我的示例程序是：

Test.java

import com.datastax.driver.mapping.annotations.Table;
import java.sql.Date;
@Table(keyspace = "testing", name = "test")
public class Test {

    private String uid;
    private Date rece;

    public String getUid() {
        return uid;
    }

    public void setUid(String uid) {
        this.uid = uid;
    }

    public Date getRece() {
        return rece;
    }

    public void setRece(Date rece) {
        this.rece = rece;
    }


}

Mapper mapper = new MappingManager(session).mapper(Test.class);
mapper.save(test);

TestDao.java

import com.datastax.driver.mapping.annotations.Table;
import java.sql.Date;
@Table(keyspace = "testing", name = "test")
public class Test {

    private String uid;
    private Date rece;

    public String getUid() {
        return uid;
    }

    public void setUid(String uid) {
        this.uid = uid;
    }

    public Date getRece() {
        return rece;
    }

    public void setRece(Date rece) {
        this.rece = rece;
    }


}

Mapper mapper = new MappingManager(session).mapper(Test.class);
mapper.save(test);

卡桑德拉模式：

---

向

com.datasax.driver.core.LocalDate

声明

rece

的数据类型，或编写自定义编解码器对

java.sql.Date

进行编码并将其注册到集群。

自定义编解码器示例：

import com.datastax.driver.core.LocalDate;
import com.datastax.driver.core.ProtocolVersion;
import com.datastax.driver.core.TypeCodec;
import com.datastax.driver.core.exceptions.InvalidTypeException;

import java.nio.ByteBuffer;
import java.sql.Date;


public class DateCodec extends TypeCodec<Date> {

    private final TypeCodec<LocalDate> innerCodec;

    public DateCodec(TypeCodec<LocalDate> codec, Class<Date> javaClass) {
        super(codec.getCqlType(), javaClass);
        innerCodec = codec;
    }

    @Override
    public ByteBuffer serialize(Date value, ProtocolVersion protocolVersion) throws InvalidTypeException {
        return innerCodec.serialize(LocalDate.fromMillisSinceEpoch(value.getTime()), protocolVersion);
    }

    @Override
    public Date deserialize(ByteBuffer bytes, ProtocolVersion protocolVersion) throws InvalidTypeException {
        return new Date(innerCodec.deserialize(bytes, protocolVersion).getMillisSinceEpoch());
    }

    @Override
    public Date parse(String value) throws InvalidTypeException {
        return new Date(innerCodec.parse(value).getMillisSinceEpoch());
    }

    @Override
    public String format(Date value) throws InvalidTypeException {
        return value.toString();
    }
}

---

我有类似的问题，根据Ashraful的回答，我在我的模型中添加了以下代码，解决了这个问题

Meta Data Model:

public class MetaData {
private String receive_date;
private String receive_hour;
**private com.datastax.driver.core.LocalDate error_date;**
}

In my service class, added below code.
final MetaData metaData = MetaData.builder()
                    .receive_date(row.getString("receive_date"))
                    .receive_hour(row.getString("receive_hour"))
                    .error_date(row.getDate("error_date"))
                    .build();

A

日期

。你也可以回答这个问题并添加你得到的异常