create few attribute converters.

Author: Heril Muratovic

src/main/java/com/starter/springboot/converters/LocalDateToSqlDateConverter.java

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+package com.starter.springboot.converters;
+
+import javax.persistence.AttributeConverter;
+import javax.persistence.Converter;
+import java.time.LocalDate;
+import java.sql.Date;
+
+
+@Converter
+public class LocalDateToSqlDateConverter implements AttributeConverter<LocalDate, Date> {
+
+    @Override
+    public Date convertToDatabaseColumn(LocalDate localDate) {
+        return ( localDate == null ? null : Date.valueOf(localDate) );
+    }
+
+    @Override
+    public LocalDate convertToEntityAttribute(Date date) {
+        return ( date == null ? null : date.toLocalDate() );
+    }
+}

src/main/java/com/starter/springboot/converters/LocalDateToUtilDateConverter.java

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+package com.starter.springboot.converters;
+
+import javax.persistence.AttributeConverter;
+import javax.persistence.Converter;
+import java.text.DateFormat;
+import java.text.ParseException;
+import java.text.SimpleDateFormat;
+import java.time.LocalDate;
+import java.time.format.DateTimeFormatter;
+import java.util.Date;
+
+
+@Converter
+public class LocalDateToUtilDateConverter implements AttributeConverter<LocalDate, Date> {
+
+    @Override
+    public Date convertToDatabaseColumn(LocalDate localDate)
+    {
+        DateFormat dateFormatLD = new SimpleDateFormat("yyyy-MM-dd");
+        String strDate = dateFormatLD.format(localDate);
+        try {
+            DateFormat dateFormatDL = new SimpleDateFormat("yyyy-MM-dd");
+            return dateFormatDL.parse(strDate);
+        }
+        catch (ParseException e) {
+            return null;
+        }
+    }
+
+    @Override
+    public LocalDate convertToEntityAttribute(Date date)
+    {
+        // format java.util.Date to String
+        DateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd hh:mm:ss");
+        String dateString = dateFormat.format(date);
+        // format String to LocalDate
+        DateTimeFormatter dateTimeFormatter = DateTimeFormatter.ofPattern("d/MM/yyyy");
+        return LocalDate.parse(dateString, dateTimeFormatter);
+    }
+}

src/main/java/com/starter/springboot/converters/StringToDateConverter.java

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+package com.starter.springboot.converters;
+
+import javax.persistence.AttributeConverter;
+import javax.persistence.Converter;
+import java.text.DateFormat;
+import java.text.ParseException;
+import java.text.SimpleDateFormat;
+import java.util.Date;
+
+
+@Converter
+public class StringToDateConverter implements AttributeConverter<String, Date> {
+
+    @Override
+    public Date convertToDatabaseColumn(String s)
+    {
+        try {
+            DateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd");
+            return dateFormat.parse(s);
+        }
+        catch (ParseException e) {
+            return null;
+        }
+    }
+
+    @Override
+    public String convertToEntityAttribute(Date date) {
+        Date currentDate = new Date();
+        DateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd");
+        return dateFormat.format(currentDate);
+    }
+}