SpringMVC组件解析

• 一、SpringMVC执行流程
• 二、SpringMVC注解解析
• • 1.value
  • 2.method
  • 3.params
  • 4.案例
• 三、Controller组件扫描
• 四、视图解析器
• 五、知识要点

注意：value通常可以省略。

 @RequestMapping(value = "/quick")

@RequestMapping(value = "/quick",method = RequestMethod.GET)

 @RequestMapping(value = "/quick",method = RequestMethod.GET,params = {"userName"})

结合：Spring入门案例：详细代码
只需要修改：
UserControll:

package com.study.controller;

import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;

@Controller
@RequestMapping("/user")
public class UserController {
    @RequestMapping(value = "/quick",method = RequestMethod.GET,params = {"userName"})
    public String save(){
        System.out.println("UserController....");
        return "/jsp/success.jsp";
    }
}

web.xml:

 
  Archetype Created Web Application
  
    DispatcherServlet
    org.springframework.web.servlet.DispatcherServlet
    
      contextConfigLocation
      classpath:spring-mvc.xml
    
    1
  
  
    DispatcherServlet
    /
  

测试：
报错：

解决办法：
输入?userName=xxx

spring-mvc.xml

UserController

package com.study.controller;

import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;

@Controller
@RequestMapping("/user")
public class UserController {
    @RequestMapping(value = "/quick",method = RequestMethod.GET,params = {"userName"})
    public String save(){
        System.out.println("UserController....");
        return "success";

    }
}

测试：