在Spring中添加Bean

2019-11-18 16:08:18

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來源：轉載

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在上次的MVC基礎上，我們準備給Controller增加Model，為此創建一個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());
    }
}

為了向SpringappController注入Bean，我們修改配置文件springapp-servlet.xml：

<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">
        
        <property name="userAccount">
            <ref bean="adminAccount" />
        </property>
    </bean>

OK，運行Ant，然后啟動Tomcat，結果輸出：

Result: administrator

注入成功！但是在Controller中放一個Account肯定是不合邏輯的，我們準備做一個用戶登錄功能，為此創建一個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改為：

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：

編譯，運行，輸入：http://localhost:8080/springmvc/hello.c?username=xuefeng&password=1234

結果顯示：