java之SpringMVC的controller配置总结

先在springmvc-servlet.xml文件作如下配置(注解开发controller)

<?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"
    xmlns:mvc="http://www.springframework.org/schema/mvc"
    xsi:schemaLocation="
http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.1.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.1.xsd"> <!-- don't handle the static resource --> <mvc:default-servlet-handler /> <!-- if you use annotation you must configure following setting --> <mvc:annotation-driven /> <!-- scan the package and the sub package --> <context:component-scan base-package="com.eco.controllor"/> <!-- configure the InternalResourceViewResolver视图解析器 --> <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver" id="internalResourceViewResolver"> <!-- 前缀 --> <property name="prefix" value="/WEB-INF/jsp/" /> <!-- 后缀 --> <property name="suffix" value=".jsp" /> </bean> </beans>

然后来看看,在有无视图解析器的情况下,转发和重定向的实现

@Controller//定义这是一个控制器
public class CController {
    @RequestMapping("/hello1")//浏览器访问路径
    public ModelAndView hello1() {
        ModelAndView mv = new ModelAndView();
        mv.addObject("msg", "world");//msg可以用el表达式在下面的页面写出来
        mv.setViewName("01.jsp");//没有视图解析器到根目录的jsp
        //mv.setViewName("hello");//有视图解析器到web-inf下的jsp
        return mv;
    }

    @RequestMapping("/hello2")
    public String hello2() {
        return "hello";//转发:使用视图解析器就转到web-inf下的jsp
        //return "redirect:hello1";//重定向:视图解析器到hello1,然后hello1转到web-inf下的hi.jsp
        //return "hello.jsp";//转发:不使用视图解析器转到根目录下的jsp
        //return "forward:01.jsp";//转发:不使用视图解析器根目录下的jsp
        //return "redirect:01.jsp";//重定向:不使用视图解析器根目录下的jsp
    }
    
    @RequestMapping("/hello3")
    public void hello3(HttpServletRequest req,HttpServletResponse resp) throws Exception{
req.setAttribute(
"a", "就是我");//a可以用el表达式在下面的页面写出来
req.getRequestDispatcher("01.jsp").forward(req, resp);//请求转发到根目录下的jsp--不需要视图解析器
//resp.sendRedirect("01.jsp");//请求重定向到根目录下的jsp--不需要视图解析器 } }

看完页面跳转,下面再来看看数据的处理(表单)

    @RequestMapping("/hello4")
    //http://localhost:8080/webmvc/hello4?name=eco
    public String hello4(String name){
        System.out.println(name);
        return "hello";
    }
    @RequestMapping("/hello5")
    //http://localhost:8080/webmvc/hello5?name=eco&pwd=112313
    //User类的成员变量和域名称一样
    public String hello5(User user){
        System.out.println(user);
        return "hello";
    }
    @RequestMapping("/hello6")
    //http://localhost:8080/webmvc/hello6?name=eco
    public String hello6(String name,Model model){
        model.addAttribute("username", name);//这个username可以在下面的jsp页面用el表达式写出来
        System.out.println(name);
        return "hello";
    }
原文地址:https://www.cnblogs.com/eco-just/p/7882016.html