package org.jrest4guice.rest.commons.converter;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.HashMap;
import java.util.Map;
import java.util.regex.Pattern;
import org.apache.commons.beanutils.Converter;
import org.jrest4guice.rest.helper.JRest4GuiceHelper;
/**
*
* @author <a href="mailto:zhangyouqun@gmail.com">cnoss (QQ:86895156)</a>
*
*/
public class DatePatternConverter {
Map<Pattern, String> patterns;
public DatePatternConverter() {
this.patterns = new HashMap<Pattern, String>();
this.patterns.put(Pattern
.compile("([0-9]{2,4})年([0-9]{1,2})月([0-9]{1,2})日"), "yyyy年MM月dd日");
this.patterns.put(Pattern
.compile("([0-9]{2,4})-([0-9]{1,2})-([0-9]{1,2})"), "yyyy-MM-dd");
this.patterns
.put(
Pattern
.compile("([0-9]{4})-([0-9]{1,2})-([0-9]{1,2}) ([0-9]{1,2}):([0-9]{1,2}):([0-9]{1,2})"),
"yyyy-MM-dd HH:mm:ss");
this.patterns.put(Pattern
.compile("([0-9]{1,2})/([0-9]{1,2})/([0-9]{4})"), "MM/dd/yyyy");
this.patterns
.put(
Pattern
.compile("([0-9]{1,2})/([0-9]{1,2})/([0-9]{4}) ([0-9]{1,2}):([0-9]{1,2}):([0-9]{1,2})"),
"MM/dd/yyyy HH:mm:ss");
}
/**
* 为BeanUtilsBean提供缺省的日期转换器
*/
public void addDefaultDateConverter() {
JRest4GuiceHelper.addBeanConvert(new Converter() {
@Override
public Object convert(Class type, Object value) {
if (type != java.sql.Time.class || value == null
|| value.toString().trim().equals(""))
return null;
Object result = DatePatternConverter.this.format(value
.toString());
if (result == null) {
try {
result = new java.sql.Time(Long.parseLong(value
.toString()));
} catch (Exception e) {
}
}
return result;
}
}, java.sql.Time.class);
JRest4GuiceHelper.addBeanConvert(new Converter() {
@Override
public Object convert(Class type, Object value) {
if (type != java.util.Date.class || value == null
|| value.toString().trim().equals(""))
return null;
Object result = DatePatternConverter.this.format(value
.toString());
if (result == null) {
try {
result = new java.util.Date(Long.parseLong(value
.toString()));
} catch (Exception e) {
}
}
return result;
}
}, java.util.Date.class);
JRest4GuiceHelper.addBeanConvert(new Converter() {
@Override
public Object convert(Class type, Object value) {
if (type != java.sql.Date.class || value == null
|| value.toString().trim().equals(""))
return null;
Object result = DatePatternConverter.this.format(value
.toString());
if (result == null) {
try {
result = new java.sql.Date(Long.parseLong(value
.toString()));
} catch (Exception e) {
}
}
return result;
}
}, java.sql.Date.class);
}
/**
* 注册新的日期转换器
*
* @param pattern
* 正则表达式
* @param patterStr
* 日期格式描述的字符串（如:2008-08-08）
* @return
*/
public DatePatternConverter registDatePattern(Pattern pattern,
String patterStr) {
this.patterns.put(pattern, patterStr);
return this;
}
/**
* 将字符串格式成日期型数据
*
* @param dateStr
* @return
*/
public Date format(String dateStr) {
String patterStr = this.getPatternString(dateStr);
SimpleDateFormat sdf = null;
if (patterStr != null)
sdf = new SimpleDateFormat(patterStr);
else
sdf = new SimpleDateFormat();
try {
return sdf.parse(dateStr);
} catch (ParseException e) {
return null;
}
}
/**
* 根据日期字符串返回指定的日期格式，用于SimpleDateFormat的格式描述
*
* @param dateStr
* @return
*/
public String getPatternString(String dateStr) {
String pattern = null;
for (Pattern p : this.patterns.keySet()) {
if (p.matcher(dateStr).matches()) {
pattern = this.patterns.get(p);
break;
}
}
return pattern;
}
}