Java将字符串转换为时间,支持多种格式
2017-11-25 23:04
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适用格式
//2017/11/25 11:11:11
//2017-11-25 11:11:11
//2017.11.25 11:11:11
//2017/11/25
//2017-11-25
//2017.11.25
public String judgeFormat(String time){
String regex1 = "^\\d{4}\\S{1}\\d{2}\\S{1}\\d{2}$";
String regex2 = "^\\d{4}\\S{1}\\d{2}\\S{1}\\d{2}\\s+\\d{2}:\\d{2}:\\d{2}$";
Pattern p1 = Pattern.compile(regex1);
Matcher m1 = p1.matcher(time);
if(m1.matches()){
return "yyyy-MM-dd||yyyy.MM.dd||yyyy/MM/dd";
}
Pattern p2 = Pattern.compile(regex2);
Matcher m2 = p2.matcher(time);
if(m2.matches()){
return "yyyy.MM.dd HH:mm:ss||yyyy/MM/dd HH:mm:ss||yyyy-MM-dd HH:mm:ss";
}
return null;
}
public Date convertStringtoDate(String time) throws ParseException{
Date date = null;
if(judgeFormat(time).startsWith("yyyy-MM-dd")){
time = convertString(time);
date = new SimpleDateFormat("yyyy-MM-dd").parse(time);
return date;
}else if(judgeFormat(time).endsWith("yyyy-MM-dd HH:mm:ss")){
time = convertString(time);
date = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss").parse(time);
return date;
}
return null;
}
public String convertString(String time){
if(time.contains("/")){
time = time.replace("/", "-");
}else if(time.contains(".")){
time = time.replace(".", "-");
}else {
}
return time;
} 正则表达式部分还需要修改.....----------------------------------------------------------------------======================================------------------------------------------------------------------
字符串前后空格匹配，格式限定
public String judgeFormat(String time){
// String regex1 = "^\\d{4}\\S{1}\\d{2}\\S{1}\\d{2}$";
// String regex2 = "^\\d{4}\\S{1}\\d{2}\\S{1}\\d{2}\\s+\\d{2}:\\d{2}:\\d{2}$";
String regex1 = "^\\s+\\d{4}(-|/|\\.){1}\\d{2}(-|/|\\.){1}\\d{2}\\s+";
String regex2 = "^\\s+\\d{4}(-|/|\\.){1}\\d{2}(-|/|\\.){1}\\d{2}\\s+\\d{2}:\\d{2}:\\d{2}\\s+";
Pattern p1 = Pattern.compile(regex1);
Matcher m1 = p1.matcher(time);
if(m1.matches()){
return "yyyy-MM-dd||yyyy.MM.dd||yyyy/MM/dd";
}
Pattern p2 = Pattern.compile(regex2);
Matcher m2 = p2.matcher(time);
if(m2.matches()){
return "yyyy.MM.dd HH:mm:ss||yyyy/MM/dd HH:mm:ss||yyyy-MM-dd HH:mm:ss";
}
return "格式不符合要求";
}
public Date convertStringtoDate(String time) throws ParseException{
Date date = null;
if(judgeFormat(time).startsWith("yyyy-MM-dd")){
time = convertString(time);
date = new SimpleDateFormat("yyyy-MM-dd").parse(time);
return date;
}else if(judgeFormat(time).endsWith("yyyy-MM-dd HH:mm:ss")){
time = convertString(time);
date = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss").parse(time);
return date;
}
return null;
}
public String convertString(String time){
if(time.contains("/")){
time = time.replace("/", "-");
}else if(time.contains(".")){
time = time.replace(".", "-");
}else {
}
return time;
}前后空格0个或多个，增加中文字符匹配
public static final String FORMATYYYYMMMDD = "yyyy-MM-dd||yyyy.MM.dd||yyyy/MM/dd";
public static final String FORMATYYYYMMDD_Z = "yyyy年MM月dd日";
public static final String FORMATYYYYMMDDHHMMSS = "yyyy.MM.dd HH:mm:ss||yyyy/MM/dd HH:mm:ss||yyyy-MM-dd HH:mm:ss";
public static final String FORMATYYYYMMDDHHMMSS_Z = "yyyy年MM月dd日 HH时mm分ss秒";
public static final String FORMATUNCR = "格式不符合要求";
public String judgeFormat(String time){
// String regex1 = "^\\d{4}\\S{1}\\d{2}\\S{1}\\d{2}$";
// String regex2 = "^\\d{4}\\S{1}\\d{2}\\S{1}\\d{2}\\s+\\d{2}:\\d{2}:\\d{2}$";
String regex1 = "^\\s*\\d{4}(-|/|\\.){1}\\d{2}(-|/|\\.){1}\\d{2}\\s*";
String regex2 = "^\\s*\\d{4}(-|/|\\.){1}\\d{2}(-|/|\\.){1}\\d{2}\\s+(\\d{2}:){2}\\d{2}\\s*";
String regex3 = "^\\s*\\d{4}([\u4e00-\u9fa5]){1}\\d{2}([\u4e00-\u9fa5]){1}\\d{2}([\u4e00-\u9fa5]){1}\\s*";
String regex4 = "^\\s*\\d{4}([\u4e00-\u9fa5]){1}(
4000
\\d{2}([\u4e00-\u9fa5]){1}){2}\\s*(\\d{2}([\u4e00-\u9fa5]){1}){3}\\s*";
Pattern p1 = Pattern.compile(regex1);
Matcher m1 = p1.matcher(time);
if(m1.matches()){
return FORMATYYYYMMMDD;
}
Pattern p2 = Pattern.compile(regex2);
Matcher m2 = p2.matcher(time);
if(m2.matches()){
return FORMATYYYYMMDDHHMMSS;
}
Pattern p3 = Pattern.compile(regex3);
Matcher m3 = p3.matcher(time);
if(m3.matches()){
return FORMATYYYYMMDD_Z;
}
Pattern p4 = Pattern.compile(regex4);
Matcher m4 = p4.matcher(time);
if(m4.matches()){
return FORMATYYYYMMDDHHMMSS_Z;
}
return FORMATUNCR;
}
public Date convertStringtoDate(String time) throws Exception{
Date date = null;
String format = judgeFormat(time);
if(FORMATYYYYMMMDD.equals(format)||FORMATYYYYMMDD_Z.equals(format)){
time = convertString(time);
date = new SimpleDateFormat("yyyy-MM-dd").parse(time);
return date;
}else if(FORMATYYYYMMDDHHMMSS.equals(format)||FORMATYYYYMMDDHHMMSS_Z.equals(format)){
time = convertString(time);
date = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss").parse(time);
return date;
}
throw new Exception(FORMATUNCR);
}
public String convertString(String time){
// if(time.contains("/")){
// time = time.replace("/", "-");
// }else if(time.contains(".")){
// time = time.replace(".", "-");
// }else {
//
// }
String format = judgeFormat(time);
if(FORMATYYYYMMMDD.equals(format)||FORMATYYYYMMDDHHMMSS.equals(format)){
time = time.replaceAll("/|\\.", "-");
}else if(FORMATYYYYMMDD_Z.equals(format)){
time = time.replaceAll("[\u4e00-\u9fa5]", "-");
time = time.substring(0, time.length() - 1);
}else if(FORMATYYYYMMDDHHMMSS_Z.equals(format)){
time = time.replaceAll("[\u4e00-\u9fa5]", "-");
String[] timeArray = time.split("-");
time = timeArray[0] + "-" + timeArray[1] + "-" + timeArray[2] + " " + timeArray[3] + ":" + timeArray[4] +":"+ timeArray[5];
}
return time;
}-----------------------------------------------------------------------------------------------------------之前写的判断两次格式有点浪费啊，修改converString方法public static final String FORMATYYYYMMMDD = "yyyy-MM-dd||yyyy.MM.dd||yyyy/MM/dd";
public static final String FORMATYYYYMMDD_Z = "yyyy年MM月dd日";
public static final String FORMATYYYYMMDDHHMMSS = "yyyy.MM.dd HH:mm:ss||yyyy/MM/dd HH:mm:ss||yyyy-MM-dd HH:mm:ss";
public static final String FORMATYYYYMMDDHHMMSS_Z = "yyyy年MM月dd日 HH时mm分ss秒";
public static final String FORMATUNCR = "格式不符合要求";
public String judgeFormat(String time){
// String regex1 = "^\\d{4}\\S{1}\\d{2}\\S{1}\\d{2}$";
// String regex2 = "^\\d{4}\\S{1}\\d{2}\\S{1}\\d{2}\\s+\\d{2}:\\d{2}:\\d{2}$";
String regex1 = "^\\s*\\d{4}(-|/|\\.){1}\\d{2}(-|/|\\.){1}\\d{2}\\s*";
String regex2 = "^\\s*\\d{4}(-|/|\\.){1}\\d{2}(-|/|\\.){1}\\d{2}\\s+(\\d{2}:){2}\\d{2}\\s*";
String regex3 = "^\\s*\\d{4}([\u4e00-\u9fa5]){1}\\d{2}([\u4e00-\u9fa5]){1}\\d{2}([\u4e00-\u9fa5]){1}\\s*";
String regex4 = "^\\s*\\d{4}([\u4e00-\u9fa5]){1}(\\d{2}([\u4e00-\u9fa5]){1}){2}\\s*(\\d{2}([\u4e00-\u9fa5]){1}){3}\\s*";
Pattern p1 = Pattern.compile(regex1);
Matcher m1 = p1.matcher(time);
if(m1.matches()){
return FORMATYYYYMMMDD;
}
Pattern p2 = Pattern.compile(regex2);
Matcher m2 = p2.matcher(time);
if(m2.matches()){
return FORMATYYYYMMDDHHMMSS;
}
Pattern p3 = Pattern.compile(regex3);
Matcher m3 = p3.matcher(time);
if(m3.matches()){
return FORMATYYYYMMDD_Z;
}
Pattern p4 = Pattern.compile(regex4);
Matcher m4 = p4.matcher(time);
if(m4.matches()){
return FORMATYYYYMMDDHHMMSS_Z;
}
return FORMATUNCR;
}
public Date convertStringtoDate(String time) throws Exception{
Date date = null;
String format = judgeFormat(time);
if(FORMATYYYYMMMDD.equals(format)||FORMATYYYYMMDD_Z.equals(format)){
time = convertString(format,time);
date = new SimpleDateFormat("yyyy-MM-dd").parse(time);
return date;
}else if(FORMATYYYYMMDDHHMMSS.equals(format)||FORMATYYYYMMDDHHMMSS_Z.equals(format)){
time = convertString(format,time);
date = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss").parse(time);
return date;
}
throw new Exception(FORMATUNCR);
}
public String convertString(String format,String time){
// if(time.contains("/")){
// time = time.replace("/", "-");
// }else if(time.contains(".")){
// time = time.replace(".", "-");
// }else {
//
// }
// String format = judgeFormat(time);
if(FORMATYYYYMMMDD.equals(format)||FORMATYYYYMMDDHHMMSS.equals(format)){
time = time.replaceAll("/|\\.", "-");
}else if(FORMATYYYYMMDD_Z.equals(format)){
time = time.replaceAll("[\u4e00-\u9fa5]", "-");
time = time.substring(0, time.length() - 1);
}else if(FORMATYYYYMMDDHHMMSS_Z.equals(format)){
time = time.replaceAll("[\u4e00-\u9fa5]", "-");
String[] timeArray = time.split("-");
time = timeArray[0] + "-" + timeArray[1] + "-" + timeArray[2] + " " + timeArray[3] + ":" + timeArray[4] +":"+ timeArray[5];
}
return time;
}
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