String转int
String str = "11"; int a = Integer.parseInt(str);
int转String
int i = 12; s=String.valueOf(i);
String转Double
String a = "10";
Double d = Double.parseDouble(a);
Double转String
Double d = 10.0;
String str = d.toString();
String转Float
String str = "1.2";
Float f = Float.valueOf(str);
Float转String
Float f = 1.6f;
String str = f.toString();
String转String[]
String str = "a,b,c";
String [] strarr = str.split(",");
String转Date
String time = "2019-01-01 12:10:12"; Date date = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss").parse(time);
String转list
String str = "a,b,c";
List list = Arrays.asList(str.split(","));
List转String
List<String> lists = Arrays.asList("1","2","3","4","5"); String str1= String.join("," , lists); 或者 String str2 = lists.stream().collect(Collectors.joining(","));
List转String[]
List<String> list=new ArrayList<String>(); String[] strings = list.toArray(new String[list.size()]);
String转BigDecimal
String str = "3.30"; BigDecimal bd = new BigDecimal(str);
BigDecimal转String
String str = "3.36"; BigDecimal bd = new BigDecimal(str); //1:代表小数点后位数,BigDecimal.ROUND_HALF_UP四舍五入 bd = bd.setScale(1,BigDecimal.ROUND_HALF_UP);
String转timestamp
String str = "2019-03-11 02:10:22"; //返回为秒数 Long second = Timestamp.valueOf(str).getTime();
timestamp转String
Long timestamp = 1552241422000L; SimpleDateFormat sf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss"); Date date = new Date(timestamp); String str = sf.format(date);
持续更新!!!