java实现身份证15位转18位

public static final String getNewId(String id)

{

final int [] W =

{

7, 9, 10, 5, 8, 4, 2, 1, 6, 3, 7, 9, 10, 5, 8, 4, 2, 1};

final String [] A =

{

"1", "0", "X", "9", "8", "7", "6", "5", "4", "3", "2"};

int i,j,s=0;

String newid;

newid = id;

newid =newid.substring(0,6)+"19"+newid.substring(6,id.length());

for ( i=0;i<newid.length() ;i++ )

{

j= Integer.parseInt(newid.substring(i,i+1))*W[i];

s=s+j;

}

s = s % 11;

newid=newid+A[s];

return newid;

}