输出至文件、文本域时让字符串对齐
代码:
1 public class Align { 2 public static void main(String[] args) { 3 System.out.println("默认输出方式"); 4 System.out.println(leftAlign("半角转全角左对齐",20,'-')); 5 System.out.println(rightAlign("半角转全角右对齐",20,'-')); 6 System.out.println(quanToban(leftAlign("全角转半角左对齐",20,'-'))); 7 System.out.println(quanToban(rightAlign("全角转半角右对齐",20,'-'))); 8 } 9 //左对齐，半角转全角（原串、希望域宽、填充字符）
10 public static String leftAlign(String str, int len,char c) { 11 char array[] = str.toCharArray(); 12 for (int i = 0; i < array.length; i++) {//半角转全角
13 if (array[i] == ' ') { 14 array[i] = '\u3000'; 15 } else if (array[i] < '\177') { 16 array[i] = (char) (array[i] + 65248); 17 } 18 } 19 int sub = len - str.length(); 20 if (sub <= 0) { 21 return new String(array);//大于等于len返回
22 } 23 char[] temp = new char[len]; 24 System.arraycopy(array, 0, temp, 0, str.length()); 25 for (int j = str.length();j < len; j++) {//左对齐右填充
26 if (c == ' ') { 27 temp[j] = '\u3000'; 28 } else if (c < '\177') { 29 temp[j] = (char) (c + 65248); 30 } 31 } 32 return new String(temp); 33 } 34 //右对齐,半角转全角
35 public static String rightAlign(String str, int len, char c) { 36 char array[] = str.toCharArray(); 37 for (int i = 0; i < array.length; i++) { 38 if (array[i] == ' ') { 39 array[i] = '\u3000'; 40 } else if (array[i] < '\177') { 41 array[i] = (char) (array[i] + 65248); 42 } 43 } 44 int sub = len - str.length(); 45 if (sub <= 0) { 46 return new String(array); 47 } 48 char[] temp = new char[len]; 49 System.arraycopy(array, 0, temp, sub, str.length()); 50 for (int j = 0;j < sub; j++) {//右对齐左填充
51 if (c == ' ') { 52 temp[j] = '\u3000'; 53 } else if (c < '\177') { 54 temp[j] = (char) (c + 65248); 55 } 56 } 57 return new String(temp); 58 } 59 //全角转半角，输出默认是半角
60 public static String quanToban(String str) { 61 char array[] = str.toCharArray(); 62 for (int i = 0; i < array.length; i++) { 63 if (array[i] == '\u3000') { 64 array[i] = ' '; 65 } else if (array[i] > '\uFF00' && array[i] < '\uFF5F') { 66 array[i] = (char) (array[i] - 65248); 67 } 68 } 69 return new String(array); 70 } 71 }
执行结果：
