如何在预处理语句java中插入Big Integer

Question

I want to insert a Big integer value using prepared statement, i have one string variable called xid (41527820021925053)

    preparedStatement = conn.prepareStatement(sql);
    preparedStatement.setObject(1,XOBJ);
    preparedStatement.setObject(2,YOBJ);
    preparedStatement.setBigInteger(3, xid);
    preparedStatement.setInt(4, 23);
    preparedStatement.executeUpdate();
    preparedStatement.close();

I am new to this how to achieve this.

Answer 1

PreparedStatement doesn't have a setBigInteger() method.

Use one of these methods:

• setBigDecimal(3, new BigDecimal(xid))
• setLong(3, Long.parseLong(xid)) if value can fit within a long
• setString(3, xid) to let the JDBC driver convert the string for you

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UPDATE

With the following comment made by OP , the second option above (now highlighted) is the correct option to use, since PostgreSQL bigint is the same a Java long .

guys i am using postgres & it has bigint ["UniqueIdGenerator"()] data-type,which is a 17 digit big integer.

Answer 2

If you are talking about an integer or long value in a String, then you should be able to just use setString(idx, yourValue) , setObject(idx, yourValue) , or setObject(idx, yourValue, java.sql.Types.BIGINT) the driver should convert this to the target type.

If you are talking about a java.math.BigInteger , then a JDBC 4.1 (or higher) compliant driver should allow you to set a BigInteger value to a BIGINT , CHAR , VARCHAR or LONGVARCHAR column using setObject(idx, yourBigInteger) , or setObject(idx, yourBigInteger, targetType) where targetType is for example java.sql.Types.BIGINT or java.sql.Types.VARCHAR .

However, be aware that not all drivers implement this support.

See JDBC 4.1 specification section 3.1 Overview of changes , table B-4 Mapping from Java Object Types to JDBC Types , table B-5 Conversions Performed by setObject and setNull Between Java Object Types and Target JDBC Types . Or alternatively, JDBC 4.2 specification , but then only tables B-4 and B-5.

Answer 3

You can try

    preparedStatement = conn.prepareStatement(sql);
    preparedStatement.setObject(1,XOBJ);
    preparedStatement.setObject(2,YOBJ);
    preparedStatement.setBigDecimal(3, BigDecimal.valueOf(Long.parseLong(xid))); //or you can try below
    preparedStatement.setBigDecimal(3, new BigDecimal(xid)); //both are correct
    preparedStatement.setInt(4, 23);
    preparedStatement.executeUpdate();
    preparedStatement.close();