如何在我的項目中使用可執行JAR文件？

Question

我已經創建了一個.jar文件，裏面有我簽名的數字證書，我想在我的項目中使用該文件，我目前如何使用它在& JAVA_HOME/jre7/lib/security文件夾中。

感謝您的幫助提前:)。

Answer 1

如果JAR在你的類路徑中，該文件是 「foo.cert」 坐在根，只是這樣做......

InputStream is = this.getClass().getResourceAsStream("/foo.cert"); 
CertificateFactory factory = CertificateFactory.getInstance("X.509"); 
X509Certificate cert = (X509Certificate) factory.generateCertificate(is); 

https://stackoverflow.com/a/4548791/791406

Answer 2

static Connection DBConnectionstring() 
    {  
     Connection con = null; 
     String conUrl = "jdbc:sqlserver://localhost:1433; databaseName=paytest; user=My-PC; password=; integratedSecurity=true; encrypt=true; trustStore=truststore.jks;trustStorePassword=pass; hostNameInCertificate=certificatekey;"; 

     try 
     { 
       con = DriverManager.getConnection(conUrl);     
       JOptionPane.showMessageDialog(null,"Connection is open!","Connection",JOptionPane.WARNING_MESSAGE); 

       } 
     catch (SQLException e) 
     { 

      e.printStackTrace(); 
     }  
     return con; 

    }//connection string method ends 

，這裏是我有連接字符串和其他sql命令的類

import java.sql.Connection; 
import java.sql.DriverManager; 
import java.sql.ResultSet; 
import java.sql.SQLException; 
import java.sql.Statement; 
import java.applet.*; 
import java.awt.*; 
import java.awt.event.*; 
import javax.net.ssl.*; 
import java.io.*; 
import java.net.*; 
import java.security.*; 

import javax.swing.JOptionPane; 
public abstract class ConnectionDB 
{ 


    public static void main(String[] args) 
    { 

     try {       
      insertRecordIntoDbUserTable(); 
      selectfromdb(); 
     } 
     catch (SQLException e) 
     { 

      System.out.println(e.getMessage()); 

     } 
} 

    private static void GuiContain() 
    { 

    } 

    private static void insertRecordIntoDbUserTable() throws SQLException 
    { 
     Connection con = null; 
     Statement statement = null; 
     String insertTableSQL = "INSERT INTO LoginDetails" + "(Username, Password) " + "VALUES" + "('username','pass1')"; 
     try 
     { 
      con = DBConnectionstring(); 
      statement = con.createStatement(); 
      System.out.println(insertTableSQL);   
      statement.executeUpdate(insertTableSQL);    
      //System.out.println("Record's inserted into Login Details table!"); 
      JOptionPane.showMessageDialog(null,"Your Data has been Inserted","Data Inserted",JOptionPane.WARNING_MESSAGE); 
     } 
     catch (SQLException e) 
     { 

      System.out.println(e.getMessage()); 
     } 
     finally 
     { 

      if (statement != null) 
      { 
        statement.close(); 
       //System.out.println("XXXXX...Statement is terminated..XXXXX"); 
       JOptionPane.showMessageDialog(null,"Statement is closed","Statement",JOptionPane.WARNING_MESSAGE); 
      } 

      if (con != null) 
      { 
       con.close(); 
       //System.out.println("Connection is Closed!!.."); 
       JOptionPane.showMessageDialog(null,"Connection is closed!","Connection",JOptionPane.WARNING_MESSAGE); 
      } 

     } 


    } 

    private static void selectfromdb() throws SQLException 
    {  
     Statement stmt = DBConnectionstring().createStatement(); 
     ResultSet rs = stmt.executeQuery("SELECT Username,Password FROM LoginDetails"); 
     while (rs.next()) 
     { 
       String lastName = rs.getString("Username"); 
       String Pass = rs.getString("Password"); 
       System.out.println(lastName + "" + Pass + "\n"); 

      }  
    } 

    static Connection DBConnectionstring() 
    {  
     Connection con = null; 
     String conUrl = "jdbc:sqlserver://localhost:1433; databaseName=paytest; user=my-PC; password=; integratedSecurity=true;"; 

     try 
     { 
       con = DriverManager.getConnection(conUrl); 

       JOptionPane.showMessageDialog(null,"Connection is open!","Connection",JOptionPane.WARNING_MESSAGE); 

       } 
     catch (SQLException e) 
     { 

      e.printStackTrace(); 
     }  
     return con; 

    } 


    }