java 半角与全角转换[转]

/**
 * 半角转全角
 *
 * @param input String.
 * @return 全角字符串.
 */
public
 
static
 String toSBC(String input) {
    
if
 (input == 
null
) {
        
return
 
""
;
    }
    
char
 c[] = input.toCharArray();
    
for
 (
int
 i = 
0
; i < c.length; i++) {
        
if
 (c[i] == 
' '
) {
            c[i] = 
'\u3000'
;
        } 
else
 
if
 (c[i] < 
'\177'
) {
            c[i] = (
char
) (c[i] + 
65248
);

        }
    }
    
return
 
new
 String(c);
}

 

/**
   * 全角转半角
   *
   * @param input String.
   * @return 半角字符串
   */
  
public
 
static
 String toDBC(String input) {
      
if
 (input == 
null
) {
          
return
 
""
;
      }
      
char
 c[] = input.toCharArray();
      
for
 (
int
 i = 
0
; i < c.length; i++) {
          
if
 (c[i] == 
'\u3000'
) {
              c[i] = 
' '
;
          } 
else
 
if
 (c[i] > 
'\uFF00'
 && c[i] < 
'\uFF5F'
) {
              c[i] = (
char
) (c[i] - 
65248
);

          }
      }
      
return
 
new
 String(c);
  }