SpringMVC 接收表單資料註解法和普通法
阿新 • • 發佈：2019-01-23
前面學習的時候用的註解法。複習的時候在想如果不用註解又該怎麼做？
不管什麼方式，先配置web.xml
DispatcherServlet（前端控制器）
<?xml version="1.0" encoding="UTF-8"?> <web-app version="2.4" xmlns="http://java.sun.com/xml/ns/j2ee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd"> <servlet> <servlet-name>springMvc</servlet-name> <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class> <load-on-startup>1</load-on-startup> </servlet> <servlet-mapping> <servlet-name>springMvc</servlet-name> <url-pattern>/</url-pattern> </servlet-mapping> <welcome-file-list> <welcome-file>addProduct.jsp</welcome-file> </welcome-file-list> </web-app>
然後寫個addProduct.jsp
<%@ page language="java" import="java.util.*" pageEncoding="gb2312"%> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> </head> <body> <form action="addProduct"> 商品名稱:<input type="text" name="name"><br /> 商品價格<input type="text" name="price"><br /> <input type="submit" value="提交" /> </form> </body> </html>
寫個實體類Product
package com.springmvc.pojo; public class Product { private String name; private float price; public String getName() { return name; } public void setName(String name) { this.name = name; } public float getPrice() { return price; } public void setPrice(float price) { this.price = price; } }
一、註解法
1.springMvc-servlet.xml 注意這裡的命名，要和web.xml裡配置的servlet-name一致，再加上-servlet.xml
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:context="http://www.springframework.org/schema/context"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-3.0.xsd">
<!-- 掃描Controller -->
<context:component-scan base-package="com.springmvc.controller"/>
<!-- 檢視解析器 -->
<bean id="viewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="prefix" value="/WEB-INF/pages/"></property>
<property name="suffix" value=".jsp"></property>
</bean>
</beans>2. addProduct @RequestMapping的位置 寫在類上和寫在方法上要正好組成一個完整的路徑
這個@RequestMapping相當於springMvc-servlet.xml中的Mapping，（）就相當於構造方法，一個引數的時候就像下面這樣 預設名稱是value，可以省略，要寫上就是@RequestMapping(value="/addProduct");如果有其他引數，就不能省略
比如 @RequestMapping(value="/addProduct",method=RequestMethod.GET)
package com.springmvc.controller;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.servlet.ModelAndView;
@Controller
@RequestMapping
public class addProduct {
@RequestMapping("/addProduct")
public ModelAndView add(){
ModelAndView view=new ModelAndView("productlist");
return view;
}
}
二、普通法
1.springMvc-servlet.xml
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:context="http://www.springframework.org/schema/context"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-3.0.xsd">
<bean id="simpleUrlHandlerMapping"
class="org.springframework.web.servlet.handler.SimpleUrlHandlerMapping">
<property name="mappings">
<props>
<prop key="/index">indexController</prop>
<prop key="/addProduct">addController</prop>
</props>
</property>
</bean>
<!-- 檢視解析器 -->
<bean id="viewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="prefix" value="/WEB-INF/pages/"></property>
<property name="suffix" value=".jsp"></property>
</bean>
<bean id="indexController" class="com.springmvc.controller.IndexController"/>
<bean id="addController" class="com.springmvc.controller.addController"/>
</beans>2.Controller
package com.springmvc.controller;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.springframework.web.bind.ServletRequestDataBinder;
import org.springframework.web.servlet.ModelAndView;
import org.springframework.web.servlet.mvc.Controller;
import com.springmvc.pojo.Product;
public class addController implements Controller {
@Override
public ModelAndView handleRequest(HttpServletRequest arg0, HttpServletResponse arg1) throws Exception {
/*
* 不用註解
* */
arg0.setCharacterEncoding("gb2312");
arg1.setCharacterEncoding("utf-8");
Product product=new Product();
ServletRequestDataBinder binder=new ServletRequestDataBinder(product);
binder.bind(arg0);
//這樣我接收到的資料就繫結到product實體類了
ModelAndView view=new ModelAndView("productlist");
view.addObject("product",product);
return view;
}
}
然後看看能不能行
<%@ page language="java" import="java.util.*" pageEncoding="gb2312"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
</head>
<body>
商品名稱:${product.name}<br />
商品價格:${product.price}<br />
</body>
</html>
三、通過一個bean來接收
@Controller
@RequestMapping
public class addProduct {
// method=RequestMethod.GET
@RequestMapping(value="/addProduct")
public Object add(Product product){
// ModelAndView view=new ModelAndView("productlist");
// return view;
System.out.println(product.getName());
System.out.println(product.getPrice());
return "pages/productlist";
}
}顯示頁：
商品名稱:${product.name }<br />
商品價格:${product.price}<br />