Question

JAVA中 获得的密码怎么用于查询

private JPasswordField passwordT=new JPasswordField(10);
char[] pass=passwordT.getPassword();
我获得了char[] 怎么用于查询数据库?
select * from message where password=char[]
这样好像有错吧?
4个中没一个答题行得通 问题我解决了:
String pass=new String(passwordT.getPassword());

Answer 1

LZ.先把得到的字符数组组成字符串,然后再比较新的字符串!
如

String pwd;
for(int i=0;i<=pass.length;i++){
pwd+=pass[i];
}
select * from message where password=pwd

Answer 2

String Password=String.ValueOf(pass);

Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
Connection conn = DriverManager.getConnection(
"jdbc:odbc:***");
String sql = "select UserID,Password from User where UserID=? and Password=?";
PreparedStatement stmt = conn.prepareStatement(sql);
stmt.setString(1, UserID);
stmt.setString(2, Password);
ResultSet rs = stmt.executeQuery();
if (rs.next()) {
...
}

看看行不行

Answer 3

把char[]转换成String
然后
select * from message where password=String
就行了

Answer 4

String pass=passwordT.getPassword();
用String接返回值
select * from message where password = pass

java 里的SQL这么写

String sql = "select * from message where password ='"+pass+"'";

Answer 5

LZ.先把得到的字符数组组成字符串,然后再比较新的字符串!
如
String
pwd;
for(int
i=0;i<=pass.length;i++){
pwd+=pass[i];
}
select
*
from
message
where
password=pwd