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在Spring中添加Bean

 2007-12-23 12:33:56 来源:WEB开发网   
核心提示:在上次的MVC基础上,我们准备给Controller增加Model,在Spring中添加Bean,为此创建一个Account Bean Class:public class Account implements java.io.Serializable { PRivate String username; priv

在上次的MVC基础上,我们准备给Controller增加Model,为此创建一个Account Bean Class:

public class Account implements java.io.Serializable {
   PRivate String username;
   private String passWord;

   public String getUsername() { return this.username; }
   public void setUsername(String username) { this.username = username; }

   public String getPassword() { return this.password; }
   public void setPassword(String password) { this.password = password; }
}

然后修改SpringappController:

public class SpringappController implements Controller {
   private Account account;
   public Account getUserAccount() { return this.account; }
   public void setUserAccount(Account account) { this.account = account; }

   public ModelAndView handleRequest(HttpServletRequest request, HttpServletResponse response)
       throws ServletException, IOException {
     return new ModelAndView("view.jsp", "model", account.getUsername());
   }
}

为了向SpringappController注入Bean,我们修改配置文件springapp-servlet.xml:

   <!-- 申明一个Account Bean -->
   <bean id="adminAccount" class="Account">
     <property name="username">
       <value>administrator</value>
     </property>
     <property name="password">
       <value>1234567</value>
     </property>
   </bean>
   <bean id="springappController" class="SpringappController">
     <!-- 注入到Controller -->
     <property name="userAccount">
       <ref bean="adminAccount" />
     </property>
   </bean>

OK,运行Ant,然后启动Tomcat,结果输出:


Result: administrator

注入成功!但是在Controller中放一个Account肯定是不合逻辑的,我们准备做一个用户登录功能,为此创建一个AccountManager Bean:

public class AccountManager implements java.io.Serializable {
   Account getAccount(String username, String password) {
     // TODO...
     Account account = new Account();
     account.setUsername(username);
     account.setPassword(password);
     return account;
   }
}

然后把SpringappController改为:

public class SpringappController implements Controller {
   private AccountManager manager;
   public AccountManager getManager() { return this.manager; }
   public void setManager(AccountManager manager) { this.manager = manager; }

   public ModelAndView handleRequest(HttpServletRequest request, HttpServletResponse response)
     throws ServletException, IOException
   {
     String username = request.getParameter("username");
     String password = request.getParameter("password");
     return new ModelAndView("view.jsp", "model",
       manager.getAccount(username, password).getUsername());
   }
}

修改springapp-servlet.xml:

   <bean id="accountManager" class="AccountManager" />
   <bean id="springappController" class="SpringappController">
     <property name="manager">
       <ref bean="accountManager" />
     </property>
   </bean>

编译,运行,输入:http://localhost:8080/springmvc/hello.c?username=xuefeng&password=1234

结果显示:

Result: xuefeng

OK,现在只要创建一个Html form,Post到Controller然后在AccountManager中验证Username和Password就可以了。

(出处:http://www.cncms.com)


Tags:Spring 添加 Bean

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