not able to fetch value from controller to view in spring from pojos - spring

Question

I have the following code as
controller
#Controller
public class ProductController {
#RequestMapping("/products")
public String list(Model model) {
Product iphone = new Product("P1233", "iPhone 5s", new BigDecimal(500));
iphone.setDescription("pple iPhone 5s smartphone with 4.00-inch 640x1136 display and 8-megapixel rear camera");
iphone.setCategory("smart phone");
iphone.setManfactuer("Apple");
iphone.setUnitsInStock(1000);
model.addAttribute("product", iphone);
return "products";
}
product
private String productId;
private String name;
private BigDecimal unitPrice;
private String description;
private String manfactuer;
private String category;
private long unitsInStock;
private long uintsInOrder;
private boolean discountinued;
//getter and setter
now when I try to fetch value in jsp as:
<h3>${product.name}</h3>
<p>${product.description}</p>
<p>${product.unitPrice}USD</p>
<p>Available ${product.unitsInStock} units in stock</p>
web.xml
<servlet>
<servlet-name>dispatcherServlet</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>dispatcherServlet</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
dispatcherServlet-servlet.xml
<mvc:annotation-driven />
<context:component-scan base-package="com.*" />
<bean
class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="prefix" value="/view/" />
<property name="suffix" value=".jsp" />
</bean>
not getting any output in browser but when I change mapping to / instead of /products and loadOnStartUp to 1 for dispatcher servlet, everything is fine.
Is there any way to get values without mapping directly to dispatcherServlet as if I have more #controller classes then IDK, how to manage this?
EDIT
I have two controllers one is
#RequestMapping("/")
public String welcome(Model model) {
model.addAttribute("greeting", "Greetings of the day");
model.addAttribute("tagline", "this is the tagline");
return "welcome";
}
working fine and when i use this configuration not getting output in browser but when I change to
#RequestMapping("/")
public String list(Model model) {
Product iphone = new Product("P1233", "iPhone 5s", new BigDecimal(500));
iphone.setDescription("pple iPhone 5s smartphone with 4.00-inch 640x1136 display and 8-megapixel rear camera");
iphone.setCategory("smart phone");
iphone.setManfactuer("Apple");
iphone.setUnitsInStock(1000);
model.addAttribute("product", iphone);
return "products";
}
giving me output , but I want to use #RequestMapping("/products) , How to do that?

Answer 1

You have configured ViewResolver?
For example:
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="prefix">
<value>/WEB-INF/views/</value>
</property>
<property name="suffix">
<value>.jsp</value>
</property>
</bean>

Answer 2

配置 web.xml
<servlet>
<servlet-name>SpringMVC</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath*:spring/spring-mvc.xml</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>SpringMVC</servlet-name>
<url-pattern>/</url-pattern>
你需要配置注解扫描包路径，及对应的视图解析器
<context:component-scan base-package="com.group.springmvc.controller" />
<mvc:annotation-driven enable-matrix-variables="true"/>
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="prefix" value="/WEB-INF/" />
<property name="suffix" value=".jsp" />
</bean>