passwordaction.java

它是利用jsp+javabean来编写的

/*
 * PasswordAction.java
 *
 * Created on 2006年8月15日, 上午3:19
 *
 * To change this template, choose Tools | Template Manager
 * and open the template in the editor.
 */

package ACTION;
import java.sql.*;
import PUBLIC.TestSql;
import PUBLIC.MD5;
/**
 *
 * @author fish
 */
public class PasswordAction extends TestSql{
    ResultSet rs;
    String Result="密码修改初始化错误";
    String name;
    String password;
    String realpassword;
    String newpassword;
    MD5 m;
    public PasswordAction() {
    }
    public void setName(String n){
        name=n.trim();
    }
    public void setPassword(String p){
        password=m.toMD5(p.trim()); //对获得的字符串进行MD5加密
    }
    public void setNewpassword(String np){
        newpassword=m.toMD5(np.trim()); //对获得的字符串进行MD5加密
    }
    public String getResult(){
        StringBuffer buffer=new StringBuffer();
        String condition="SELECT UserPassword FROM TestUser WHERE UserName="+"'"+name+"'";  //查找指定用户的密码
        try {
            rs=sql.executeQuery(condition);
            while(rs.next())
                realpassword=rs.getString("UserPassword").trim();   //将该用户的密码取出存入变量
        } catch (SQLException ex) {
            buffer.append("用户不存在");
            ex.printStackTrace();
        }
        if(realpassword.equals(password)){  //判断密码是否正确
            condition="UPDATE TestUser SET UserPassword="+"'"+newpassword+"'"+" WHERE UserName="+"'"+name+"'";
            try {
                sql.executeUpdate(condition);
                buffer.append("密码修改成功");
            } catch (SQLException ex) {
                buffer.append("密码修改失败");
                ex.printStackTrace();
            } 
        }
        Result=new String(buffer);
        return Result;
    }
}