寻找最优的做法！解决方案

//格式固定的话不需要想太复杂吧String[] strArr = "2011_09_14_15_58_28".split("_");System.out.println(new StringBuilder(strArr[0]).append("-").append(    strArr[1]).append("-").append(strArr[2]).append(" ").append(    strArr[3]).append(":").append(strArr[4]).append(":").append(    strArr[5]).toString());
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Java code
SimpleDateFormat sdf = new SimpleDateFormat("yyyy_MM_dd_HH_mm_ss");SimpleDateFormat sdf2 = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");sdf2.format(sdf.parse("2011_09_14_15_58_28"));
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探讨


Java code

//格式固定的话不需要想太复杂吧
String[] strArr = "2011_09_14_15_58_28".split("_");
System.out.println(new StringBuilder(strArr[0]).append("-").append(
    strArr[1]).append("-").append(strArr[2]).appen……

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Java code
import java.text.*;import java.util.*;public class Test {    public static void main(String[] args) throws Exception {        String s = "2011_09_14_15_58_28";        SimpleDateFormat format = new SimpleDateFormat("yyyy_MM_dd_HH_mm_ss");        Date date = format.parse(s);        format = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");        System.out.println(format.format(date));    }}
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for example
Java code
String s = "2011_09_14_15_58_28";String[] sa = s.split("_");s = String.format("%s-%s-%s %s:%s:%s", sa[0], sa[1], sa[2], sa[3], sa[4], sa[5]);orStringBuilder buf = new StringBuilder();for (int i=0; i<sa.length; i++) {    if (i < 2) {        buf.append(sa[i]).append("-");    } else if (i == 2) {        buf.append(s[i]).append(" ");    } else if (i < 5) {        buf.append(s[i]).append(":");    } else {       buf.append(sa[i]);    }}s = buf.toString();
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个人觉得2楼好,不用很多对象,很多对象,简单实际.
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探讨


Java code

//格式固定的话不需要想太复杂吧
String[] strArr = "2011_09_14_15_58_28".split("_");
System.out.println(new StringBuilder(strArr[0]).append("-").append(
    strArr[1]).append("-").append(strArr[2]).appen……

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赶紧结贴吧
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Java code
String time = new String("2011_09_14_15_58_28");        SimpleDateFormat a = new SimpleDateFormat("yyyy_MM_dd_HH_mm_ss");        try {            Date date = a.parse(time);            System.out.println("将字符串转化为时间是" + date);        } catch (ParseException e) {            throw new RuntimeException("");        }
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Java code
public static void main(String[] args) {     String a = "2011_09_14_15_58_28";     String b = a.substring(0, 10).replace('_', '-') + " " + a.substring(11).replace('_', ':');     System.out.println(b);     }