How To Convert Java.Util.Date To Java.Sql.Date - Jdbc Example
You oft require to convert java.util.Date to java.sql.Date if y'all are storing dates inwards database e.g. SQL SERVER or MySQL. Since JDBC has their ain information types for appointment in addition to fourth dimension e.g. java.sql.Date, java.sql.Time in addition to java.sql.TimeStamp to check amongst database date, fourth dimension in addition to date-time types, y'all cannot top a java.util.Date directly. All methods which are suppose to shop dates e.g. setDate(paramName, paramValue) expects java.sql.Date, in addition to then it becomes essential to know how to convert java.util.Date to java.sql.Date inwards JDBC. You would hold out surprised to know that java.sql.Date is a subclass of java.util.Date in addition to all it does is suppress or withdraw time-related fields from java.util.Date.
It is likewise a skilful instance of a degree which violates Liskov commutation principle, because fifty-fifty though java.sql.Date extends java.util.Date, y'all cannot top roughly it to the method which facial expression java.util.Date because all time-related methods e.g. getHour(), getMinute() in addition to getSeconds() method throws java.util.NotSupportedException.
I actually promise that JDBC driver could practise the translation depending upon the information type of columns in addition to Java developer could simply top the java.util.Date e.g. convert it to java.sql.Date if the column inwards the tabular array is of type DATE, java.sql.Time if the type of column is TIME in addition to java.sql.Timestamp if the information type of column is DATETIME.
This is the easiest in addition to correct agency to convert a java.util.Date to java.sql.Date inwards Java. To larn to a greater extent than close JDBC in addition to how to write Java application which connects to the database, delight encounter Core Java, Volume II--Advanced Features (10th Edition), i of the best books to larn advanced features of Java programming language.
Things to remember
1) java.sql.Date mapped to DATE datatype on JDBC i.e. Type.Date, which corresponds to appointment equivalent inwards DB side. In SQLSERVER till 2008 it maps to DATETIME in addition to afterwards maps to DATE information type.
2) java.sql.Date extends java.util.Date but voilates Liskov Substituion Principle.
3) You tin convert betwixt java.util.Date in addition to java.sql.Date past times using getTime() method.
4) Here is mapping betwixt MySQL appointment in addition to fourth dimension types in addition to Java appointment types:
That's all close how to convert java.util.Date to java.sql.Date inwards Java in addition to JDBC. It's i of the most useful tips spell working inwards JDBC. You tin fifty-fifty practise a degree similar JdbcUtil to host all appointment in addition to time-related conversion methods e.g. toSQLDate(), toSQLTime() etc.
Further Learning
Complete Java Masterclass
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It is likewise a skilful instance of a degree which violates Liskov commutation principle, because fifty-fifty though java.sql.Date extends java.util.Date, y'all cannot top roughly it to the method which facial expression java.util.Date because all time-related methods e.g. getHour(), getMinute() in addition to getSeconds() method throws java.util.NotSupportedException.
I actually promise that JDBC driver could practise the translation depending upon the information type of columns in addition to Java developer could simply top the java.util.Date e.g. convert it to java.sql.Date if the column inwards the tabular array is of type DATE, java.sql.Time if the type of column is TIME in addition to java.sql.Timestamp if the information type of column is DATETIME.
Converting java.util.Date to java.sql.Date - Example
Unfortunately, at that topographic point is no method similar toSQLDate() inwards java.util.Date degree to facilitate conversion betwixt util appointment in addition to SQL appointment but y'all tin role getTime() method to extract long millisecond value from java.util.Date in addition to practise a novel java.sql.Date based on that value equally shown below:Date at nowadays = new Date(); java.sql.Date sqlDate = new java.sql.Date(now.getTime());
This is the easiest in addition to correct agency to convert a java.util.Date to java.sql.Date inwards Java. To larn to a greater extent than close JDBC in addition to how to write Java application which connects to the database, delight encounter Core Java, Volume II--Advanced Features (10th Edition), i of the best books to larn advanced features of Java programming language.
Things to remember
1) java.sql.Date mapped to DATE datatype on JDBC i.e. Type.Date, which corresponds to appointment equivalent inwards DB side. In SQLSERVER till 2008 it maps to DATETIME in addition to afterwards maps to DATE information type.
2) java.sql.Date extends java.util.Date but voilates Liskov Substituion Principle.
3) You tin convert betwixt java.util.Date in addition to java.sql.Date past times using getTime() method.
4) Here is mapping betwixt MySQL appointment in addition to fourth dimension types in addition to Java appointment types:
That's all close how to convert java.util.Date to java.sql.Date inwards Java in addition to JDBC. It's i of the most useful tips spell working inwards JDBC. You tin fifty-fifty practise a degree similar JdbcUtil to host all appointment in addition to time-related conversion methods e.g. toSQLDate(), toSQLTime() etc.
Further Learning
Complete Java Masterclass
tutorial)
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