TestCode
1
package
onlyfun.caterpillar;
2
3 import javax.servlet. * ;
4 import java.util. * ;
5 import java.sql. * ;
6
7 public class Functions {
8 private static Connection conn = null ;
9
10 public static boolean filled_out(ServletRequest req) {
11 Enumeration form_vars = req.getParameterNames();
12 while (form_vars.hasMoreElements()) {
13 String var = (String) form_vars.nextElement();
14 if (req.getParameter(var).length() == 0 )
15 return false ;
16 }
17 return true ;
18 }
19
20 public static boolean valid_email(String address) {
21 if (address.matches( " ^[_a-z0-9-]+(.[_a-z0-9-]+)*@[a-z0-9-]+(.[a-z0-9-]+)*$ " ))
22 return true ;
23 else
24 return false ;
25 }
26
27 public static Connection getDBConnection(ServletContext context) {
28 if (conn == null ) {
29 String sqluri = " jdbc:mysql://localhost:3306/ " + context.getInitParameter( " sqldb " ) + " ?useUnicode=true&characterEncoding=big5 " ;
30 String sqluser = context.getInitParameter( " sqluser " );
31 String sqlpwd = context.getInitParameter( " sqlpwd " );
32 try {
33 Class.forName(context.getInitParameter( " sqldriver " ));
34 conn = DriverManager.getConnection(sqluri, sqluser, sqlpwd);
35 }
36 catch (Exception e) {
37 }
38 }
39
40 return conn;
41 }
42
43 public static boolean login(ServletContext application, String username, String passwd) {
44 try {
45 Connection conn = getDBConnection(application);
46 ResultSet result = conn.createStatement().executeQuery(
47 " SELECT * FROM users WHERE username=' " + username + " ' and passwd=password(' " + passwd + " ') " );
48 return result.next();
49 }
50 catch (Exception e) {
51 }
52
53 return false ;
54 }
55
56 public static boolean change_password(ServletContext application, String username, String old_password, String new_password) {
57 if (login(application, username, old_password)) {
58 Connection conn = getDBConnection(application);
59 if (conn == null ) {
60 return false ;
61 }
62
63 try {
64 int result = conn.createStatement().executeUpdate( " UPDATE users SET passwd=password(' " + new_password + " ') WHERE username=' " + username + " ' " );
65
66 if (result == 0 ) {
67 return false ;
68 }
69 else {
70 return true ;
71 }
72
73 } catch (SQLException e) {}
74 }
75
76 return false ;
77 }
78
79 public static boolean add_bm(ServletContext application, String username, String new_url) {
80 Connection conn = getDBConnection(application);
81 if (conn == null ) {
82 return false ;
83 }
84 try {
85 // 乓琌狡
86 ResultSet result = conn.createStatement().executeQuery( " SELECT * FROM bookmark WHERE username=' " + username + " ' AND bm_URL=' " + new_url + " ' " );
87
88 if (result.next())
89 return false ;
90
91 int dn = conn.createStatement().executeUpdate( " INSERT INTO bookmark VALUES(' " + username + " ',' " + new_url + " ') " );
92
93 if (dn == 0 )
94 return false ;
95 }
96 catch (SQLException e) {
97 return false ;
98 }
99 return true ;
100 }
101
102 public static boolean delete_bm(ServletContext application, String username, String url) {
103 Connection conn = getDBConnection(application);
104 if (conn == null ) {
105 return false ;
106 }
107 try {
108 int dn = conn.createStatement().executeUpdate( " DELETE FROM bookmark WHERE username=' " + username + " ' AND bm_URL=' " + url + " ' " );
109 if (dn == 0 )
110 return false ;
111 }
112 catch (SQLException e) {
113 return false ;
114 }
115 return true ;
116 }
117 }
118
2
3 import javax.servlet. * ;
4 import java.util. * ;
5 import java.sql. * ;
6
7 public class Functions {
8 private static Connection conn = null ;
9
10 public static boolean filled_out(ServletRequest req) {
11 Enumeration form_vars = req.getParameterNames();
12 while (form_vars.hasMoreElements()) {
13 String var = (String) form_vars.nextElement();
14 if (req.getParameter(var).length() == 0 )
15 return false ;
16 }
17 return true ;
18 }
19
20 public static boolean valid_email(String address) {
21 if (address.matches( " ^[_a-z0-9-]+(.[_a-z0-9-]+)*@[a-z0-9-]+(.[a-z0-9-]+)*$ " ))
22 return true ;
23 else
24 return false ;
25 }
26
27 public static Connection getDBConnection(ServletContext context) {
28 if (conn == null ) {
29 String sqluri = " jdbc:mysql://localhost:3306/ " + context.getInitParameter( " sqldb " ) + " ?useUnicode=true&characterEncoding=big5 " ;
30 String sqluser = context.getInitParameter( " sqluser " );
31 String sqlpwd = context.getInitParameter( " sqlpwd " );
32 try {
33 Class.forName(context.getInitParameter( " sqldriver " ));
34 conn = DriverManager.getConnection(sqluri, sqluser, sqlpwd);
35 }
36 catch (Exception e) {
37 }
38 }
39
40 return conn;
41 }
42
43 public static boolean login(ServletContext application, String username, String passwd) {
44 try {
45 Connection conn = getDBConnection(application);
46 ResultSet result = conn.createStatement().executeQuery(
47 " SELECT * FROM users WHERE username=' " + username + " ' and passwd=password(' " + passwd + " ') " );
48 return result.next();
49 }
50 catch (Exception e) {
51 }
52
53 return false ;
54 }
55
56 public static boolean change_password(ServletContext application, String username, String old_password, String new_password) {
57 if (login(application, username, old_password)) {
58 Connection conn = getDBConnection(application);
59 if (conn == null ) {
60 return false ;
61 }
62
63 try {
64 int result = conn.createStatement().executeUpdate( " UPDATE users SET passwd=password(' " + new_password + " ') WHERE username=' " + username + " ' " );
65
66 if (result == 0 ) {
67 return false ;
68 }
69 else {
70 return true ;
71 }
72
73 } catch (SQLException e) {}
74 }
75
76 return false ;
77 }
78
79 public static boolean add_bm(ServletContext application, String username, String new_url) {
80 Connection conn = getDBConnection(application);
81 if (conn == null ) {
82 return false ;
83 }
84 try {
85 // 乓琌狡
86 ResultSet result = conn.createStatement().executeQuery( " SELECT * FROM bookmark WHERE username=' " + username + " ' AND bm_URL=' " + new_url + " ' " );
87
88 if (result.next())
89 return false ;
90
91 int dn = conn.createStatement().executeUpdate( " INSERT INTO bookmark VALUES(' " + username + " ',' " + new_url + " ') " );
92
93 if (dn == 0 )
94 return false ;
95 }
96 catch (SQLException e) {
97 return false ;
98 }
99 return true ;
100 }
101
102 public static boolean delete_bm(ServletContext application, String username, String url) {
103 Connection conn = getDBConnection(application);
104 if (conn == null ) {
105 return false ;
106 }
107 try {
108 int dn = conn.createStatement().executeUpdate( " DELETE FROM bookmark WHERE username=' " + username + " ' AND bm_URL=' " + url + " ' " );
109 if (dn == 0 )
110 return false ;
111 }
112 catch (SQLException e) {
113 return false ;
114 }
115 return true ;
116 }
117 }
118