在Java类中加载jar

Question

I have a simple java class I want to load a jar file in my main method. How can I load the jar so that its available

  public static void main(String args[]) throws SQLException, IOException{

    String connectionString = "connectionstring";
    File platformDB = new File(tempDir, "PlatformDB.eap");

    createNewTempDirectory();
    Mirror  m = new Mirror(connectionString, createEmptyEap(emptyEapName) ,platformDB.getAbsolutePath());
    m.run();
}

Mirror Class

    static {
        try {
            Class.forName("com.microsoft.sqlserver.jdbc.SQLServerDriver");
        } catch (ClassNotFoundException e) {
        }
        try {
            Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
        } catch (ClassNotFoundException e) {
        }
}

In Mirror.run method I try to make a connection to database

Mirror.run() method

 public void run() {
    this.source = DriverManager.getConnection(EaDbStringParser.eaDbStringToJdbc(sourceString));
    this.source.setReadOnly(true);
}

I have a jar file located under "C:\\sqljdbc_4.0\\enu\\sqljdbc4.jar" How can I load this jar so the connection is made successfully

Thanks

Answer 1

您只需要使用-classpath选项运行该类：

java -classpath C:\sqljdbc_4.0\enu\sqljdbc4.jar

Answer 2

The simplest way is to add the jar to the classpath loading the main class. For example if Mirror is the class with the main method where you say from console

`java Mirror' 

modify it to

'java -cp C:/sqljdbc_4.0/enu/sqljdbc4.jar Mirror`