EJB--应用创造下

矫情吗；* 2021-09-21 04:40 277阅读 0赞

创建客户端以访问EJB

一、创建客户端以访问EJB

*  在NetBeans IDE中，选择File>New Project>。
 *  在“Java类别”下选择“项目类型”，将“项目类型”选为“Java应用程序”。单击下一步按钮。
 *  输入项目名称和位置。单击Finish>按钮。我们选择了EjbTester这个名字。
 *  在项目资源管理器窗口中右键单击项目名称。选择属性。
 *  使用“编译”选项卡中的“添加项目”按钮在库下添加先前创建的EJB组件项目。
 *  使用compile选项卡中的Add jar/folder按钮添加jboss库。Jboss库可以位于<Jboss installation folder>>客户机文件夹。

在project say EjbTester下创建jndi.properties。

### jndi.properties ###

java.naming.factory.initial=org.jnp.interfaces.NamingContextFactory
    java.naming.factory.url.pkgs=org.jboss.naming:org.jnp.interfaces
    java.naming.provider.url=localhost

下面创建包com.tutorialspoint.test和EJBTester.java类。

### EJBTester.java ###

package com.tutorialspoint.test;
     
    import com.tutorialspoint.stateless.LibrarySessionBeanRemote;
    import java.io.BufferedReader;
    import java.io.FileInputStream;
    import java.io.IOException;
    import java.io.InputStreamReader;
    import java.util.List;
    import java.util.Properties;
    import javax.naming.InitialContext;
    import javax.naming.NamingException;
     
     
    public class EJBTester {
       BufferedReader brConsoleReader = null; 
       Properties props;
       InitialContext ctx;
       {
          props = new Properties();
          try {
             props.load(new FileInputStream("jndi.properties"));
          } catch (IOException ex) {
             ex.printStackTrace();
          }
          try {
             ctx = new InitialContext(props);            
          } catch (NamingException ex) {
             ex.printStackTrace();
          }
          brConsoleReader = 
          new BufferedReader(new InputStreamReader(System.in));
       }
       public static void main(String[] args) {
     
          EJBTester ejbTester = new EJBTester();
     
          ejbTester.testStatelessEjb();
       }
       private void showGUI() {
          System.out.println("**********************");
          System.out.println("Welcome to Book Store");
          System.out.println("**********************");
          System.out.print("Options \n1. Add Book\n2. Exit \nEnter Choice: ");
       }
       private void testStatelessEjb() {
          try {
             int choice = 1; 
             LibrarySessionBeanRemote libraryBean = 
             (LibrarySessionBeanRemote)ctx.lookup("LibrarySessionBean/remote");
             while (choice != 2) {
                String bookName;
                showGUI();
                String strChoice = brConsoleReader.readLine();
                choice = Integer.parseInt(strChoice);
                if (choice == 1) {
                   System.out.print("Enter book name: ");
                   bookName = brConsoleReader.readLine();                    
                   libraryBean.addBook(bookName);          
                }else if (choice == 2) {
                   break;
                }
             }
             List<String> booksList = libraryBean.getBooks();
             System.out.println("Book(s) entered so far: " + booksList.size());
             for (int i = 0; i < booksList.size(); ++i) {
                System.out.println((i+1)+". " + booksList.get(i));
             }
             LibrarySessionBeanRemote libraryBean1 = 
             (LibrarySessionBeanRemote)ctx.lookup("LibrarySessionBean/remote");
             List<String> booksList1 = libraryBean1.getBooks();
             System.out.println(
                "***Using second lookup to get library stateless object***");
             System.out.println(
                "Book(s) entered so far: " + booksList1.size());
             for (int i = 0; i < booksList1.size(); ++i) {
                System.out.println((i+1)+". " + booksList1.get(i));
             }
          } catch (Exception e) {
             System.out.println(e.getMessage());
             e.printStackTrace();
          } finally {
             try {
                if(brConsoleReader !=null) {
                   brConsoleReader.close();
                }
             } catch (IOException ex) {
                System.out.println(ex.getMessage());
             }
          }
       }  
    }

二、运行客户端访问EJB

在项目资源管理器中找到EJBTester.java。右键单击EJBTester类并选择run file。

Verify the following output in Netbeans console.

run:
    **********************
    Welcome to Book Store
    **********************
    Options 
    1. Add Book
    2. Exit 
    Enter Choice: 1
    Enter book name: Learn Java
    **********************
    Welcome to Book Store
    **********************
    Options 
    1. Add Book
    2. Exit 
    Enter Choice: 2
    Book(s) entered so far: 1
    1. Learn Java
    ***Using second lookup to get library stateless object***
    Book(s) entered so far: 0
    BUILD SUCCESSFUL (total time: 13 seconds)

参考：

[https://www.tutorialspoint.com/ejb/ejb\_create\_application.htm][https_www.tutorialspoint.com_ejb_ejb_create_application.htm]

[https_www.tutorialspoint.com_ejb_ejb_create_application.htm]: https://www.tutorialspoint.com/ejb/ejb_create_application.htm