SQL语句的正则表达式

上学期作了一个简单数据库管理系统，判断SQL语法时百度了发现不多关于SQL的正则，因此分享一下，写得通常般，多多指教

 1 //建表
 2   public static boolean isCreateTAB(String sql) {  3    String str="^[\\s]*CREATE[\\s]*+TABLE+[\\s]*[A-Z][A-Z]*[\\s]*"
 4      + "[(][A-Z][A-Z]*[\\s]*+[CHAR[(][0-9][0-9]*[)]|"
 5      + "VARCHAR[(][0-9][0-9]*[)]|INT][,[A-Z][A-Z]*[\\s]*"
 6      + "(CHAR[(][0-9][0-9]*[)]|[VARCHAR][(][0-9][0-9]*[)]|[INT])]*"
 7      + "[,PRIMARY[\\s]*KEY][(][A-Z][A-Z]*[,[A-Z][A-Z]*]*[)][)][\\s]*$";  8    Pattern p=Pattern.compile(str,Pattern.CASE_INSENSITIVE);  9    Matcher m = p.matcher(sql); 10    boolean flag = m.matches(); 11    return flag; 12  } 13   
14 //测试语句：create TABLE A(ID INT,NAME CHAR(5),age int,D VARCHAr(12)),PRIMARY KEY(ID) 15 
16 //删表
17    public static boolean isDropTAB(String sql) { 18     String str="^[\\s]*DROP[\\s]+TABLE+[\\s][A-Z][A-Z]*[\\s]*"; 19     Pattern p=Pattern.compile(str,Pattern.CASE_INSENSITIVE); 20     Matcher m = p.matcher(sql); 21     boolean flag = m.matches(); 22     return flag; 23    }

 1 //建库
 2  public static boolean isCreateDB(String sql) {  3   String str="^[\\s]*CREATE[\\s]*+DATABASE+[\\s]*[A-Z][A-Z]*[\\s]*$";  4   Pattern p=Pattern.compile(str,Pattern.CASE_INSENSITIVE);  5   Matcher m = p.matcher(sql);  6   boolean flag = m.matches();  7   return flag;  8  }  9  
10  //删库
11   public static boolean isDropDB(String sql) { 12    String str="^[\\s]*DROP[\\s]+DATABASE+[\\s][A-Z][A-Z]*[\\s]*$"; 13    Pattern p=Pattern.compile(str,Pattern.CASE_INSENSITIVE); 14    Matcher m = p.matcher(sql); 15    boolean flag = m.matches(); 16    return flag; 17   }

/*select*/
 public static boolean isSelect(String sql) { String str="^[\\s]*SELECT[\\s]*+([\\*]|[[a-z][a-z]*(,[A-Z][A-Z]*)*])"
    + "+[\\s]*+FROM[\\s]+([A-Z][A-Z]*)[\\s]*+(WHERE[\\s]*"
    + "+([A-Z][A-Z]*[=<>][^\\s]+[\\s]*(OR|AND)[\\s]*)*"
    + "([A-Z][A-Z]*[=<>][^\\s]+[\\s]*)[\\s]*)*$"; Pattern p=Pattern.compile(str,Pattern.CASE_INSENSITIVE); Matcher m = p.matcher(sql); boolean flag = m.matches(); return flag; }

//delete（删除记录行） DELETE FROM 表名称 WHERE 列名称 = 值
 public static boolean isDelete(String sql) { boolean flag=false; String str="^[\\s]*DELETE[\\s]+FROM[\\s]+([A-Z][A-Z]*)"
    + "[\\s]+(WHERE[\\s]+([A-Z][A-Z]*[=<>]([0-9]|[\\'][A-Z][\\']))"
    + "(,[A-Z][A-Z]*[=<>][^\\s]+[\\s]*)*[\\s]*)*$"; Pattern p=Pattern.compile(str); Matcher m = p.matcher(sql); flag = m.matches(); return flag; }

//update UPDATE 表名称 SET 列名称 = 新值 WHERE 列名称 = 某值
  public static boolean isUpdate(String sql) { String str="^[\\s]*UPDATE[\\s][A-Z][A-Z]*[\\s]"
     + "SET[\\s][A-Z][A-Z]*=([0-9]|[\\'][A-Z][A-Z]*[\\'])"
     + "(,[A-Z][A-Z]*=([0-9]|[\\'][A-Z][A-Z]*[\\']))*[\\s]"
     + "WHERE[\\s][A-Z][A-Z]*[=<>]([0-9]|[\\'][A-Z][A-Z]*[\\'])"
     + "([\\s](AND|OR)[\\s][A-Z][A-Z]*[=<>]([0-9]|[\\'][A-Z][A-Z]*[\\']))*$"; Pattern p=Pattern.compile(str,Pattern.CASE_INSENSITIVE); Matcher m = p.matcher(sql); boolean flag = m.matches(); return flag; }

 1 //insert
 2 public static boolean isInsert(String sql) {  3   String str="^[\\s]*INSERT[\\s]*INTO[\\s]*[A-Z][A-Z]*"
 4     + "[\\s]*[(][A-Z][A-Z]*(,[A-Z][A-Z]*)*[)][\\s]*+"
 5     + "VALUES+[\\s]*[(](([0-9][0-9]*|[\\'][A-Z0-9][A-Z0-9]*[\\']))"
 6     + "(,([0-9][0-9]*|[\\'][A-Z0-9][A-Z0-9]*[\\']))*[)]$";  7   
 8   Pattern p=Pattern.compile(str,Pattern.CASE_INSENSITIVE);  9   Matcher m = p.matcher(sql); 10   boolean flag = m.matches(); 11   if(flag) { 12    flag=matchAttribute(sql);//若是符合sql语法，进一步判断属性的个数跟值的个数是否同样
13  } 14    return flag; 15  } 16 //属性列和值列匹配
17 public static boolean matchAttribute(String sql){ 18     boolean flat=true; 19     String sqlArr[]=sql.split(" ");//按空格分，第三列对应属性列，第四个对应值列
20     String sqlArr0=sqlArr[2].substring(sqlArr[2].indexOf("(") + 1, sqlArr[2].indexOf(")"));//属性列()中内容
21      String sqlArr1=sqlArr[3].substring(sqlArr[3].indexOf("(") + 1, sqlArr[3].indexOf(")"));//值列()中内容
22      String sqlArr01[]=sqlArr0.split(",");//()里按逗号分，匹配属性列数和值列数
23       String sqlArr11[]=sqlArr1.split(","); 24     if(sqlArr01.length!=sqlArr11.length) { 25             System.out.println("属性列数和值列数不一致"); 26             flag=false; 27  } 28   return flag; 29 
30 
31 }

 1 //权限
 2 public static boolean isGrant(String sql) {  3   boolean flag=false;  4   String str="^[\\s]*GRANT[\\s]*+([A-Z][A-Z]*)(,[A-Z][A-Z]*)*"
 5     + "+[\\s]*+ON+[\\s]*[([A-Z.][A-Z.]*)(,[A-Z.][A-Z.]*)*+[\\s]]*"
 6     + "TO+[\\s]*([A-Z][A-Z]*)(,[A-Z][A-Z]*)*$";  7   
 8   Pattern p=Pattern.compile(str,Pattern.CASE_INSENSITIVE);  9   Matcher m = p.matcher(sql); 10   flag = m.matches(); 11   return flag; 12  } 13  
14  //测试语句：GRANT SELecT ON D.B,M.DT TO YJL,YXB
15  public static boolean isGrantCreate(String sql) 16  { 17   boolean flag=false; 18   String str="^[\\s]*GRANT[\\s]*+([A-Z][A-Z]*[\\s]*[A-Z][A-Z]*)"
19     + "(,[A-Z][A-Z]*[\\s]*[A-Z][A-Z]*)*+[\\s]*+TO+[\\s]*"
20     + "([A-Z][A-Z]*)(,[A-Z][A-Z]*)*$"; 21   
22   Pattern p=Pattern.compile(str,Pattern.CASE_INSENSITIVE); 23   Matcher m = p.matcher(sql); 24   flag = m.matches(); 25   return flag; 26  } 27

 1 //撤销权限
 2 public static boolean isRevoke(String sql) {  3   boolean flag=false;  4   String str="^[\\s]*REVOKE[\\s]*+([A-Z][A-Z]*)(,[A-Z][A-Z]*)*+[\\s]*"
 5     + "ON+[\\s]*[([A-Z.][A-Z.]*)(,[A-Z.][A-Z.]*)*+[\\s]]*"
 6     + "FROM+[\\s]*([A-Z][A-Z]*)(,[A-Z][A-Z]*)*$";  7   Pattern p=Pattern.compile(str,Pattern.CASE_INSENSITIVE);  8   Matcher m = p.matcher(sql);  9   flag = m.matches(); 10   return flag; 11  } 12 
13 //测试语句：REVOKE SELecT,DELETE ON D,M.DT FROM YJL,YXB
14 public static boolean isRevokeCreate(String sql) 15  { 16   boolean flag=false; 17   String str="^[\\s]*REVOKE[\\s]*+([A-Z][A-Z]*[\\s]*[A-Z][A-Z]*)"
18     + "(,[A-Z][A-Z]*[\\s]*[A-Z][A-Z]*)*+[\\s]*+FROM+[\\s]*"
19     + "([A-Z][A-Z]*)(,[A-Z][A-Z]*)*$"; 20   
21   Pattern p=Pattern.compile(str,Pattern.CASE_INSENSITIVE); 22   Matcher m = p.matcher(sql); 23   flag = m.matches(); 24   return flag; 25  } 26 ```