使用DateFormat类格式化Date，dateformatdate,package cn.o

使用DateFormat类格式化Date，dateformatdate,package cn.o

package cn.outofmemory.test;import java.text.DateFormat;import java.text.ParseException;import java.text.SimpleDateFormat;import java.util.Date;public class ConcurrentDateFormatAccess { public Date convertStringToDate(String dateString) throws ParseException {  return SimpleDateFormat.getDateInstance(DateFormat.MEDIUM).parse(dateString); }}

package cn.outofmemory.test;import java.text.DateFormat;import java.text.ParseException;import java.text.SimpleDateFormat;import java.util.Date;public class ConcurrentDateFormatAccess { private DateFormat df = new SimpleDateFormat("yyyy MM dd"); public Date convertStringToDate(String dateString) throws ParseException {  Date result;  synchronized(df) {   result = df.parse(dateString);  }  return result; }}

package cn.outofmemory.test;import java.text.DateFormat;import java.text.ParseException;import java.text.SimpleDateFormat;import java.util.Date;public class ConcurrentDateFormatAccess { private ThreadLocal<DateFormat> df = new ThreadLocal<DateFormat> () {  @Override  protected DateFormat initialValue() {   return new SimpleDateFormat("yyyy MM dd");  } }; public Date convertStringToDate(String dateString) throws ParseException {  return df.get().parse(dateString); }}