spring mvc的使用

Spring MVC 它是Spring框架的一个子产品,它是一个典型的教科书式的mvc构架，而不像struts等都是变种或者不是完全基于MVC系统的框架，对于初学者或者想了解MVC的人来说我觉得 Spring是最好的，它的实现就是教科书,
	PS:spring mvc 希望用户在使用controller不再调用任何servlet里面的对象
		-->解耦方式(耦:耦合)
1.导入架包
	-->直接导入Spring的所有jar即可(因属于Spring的子产品,后面也会用到Spring)
	-->除Spring的架包,还需要导入commons-logging-1.1.1和标准标签库的包
2.添加Web.xml中关于SpringMVC的配置
	-->建议复制标准配置,然后修改即可
    
 

 
  
  

   
   
   
    spring
    
   
     org.springframework.web.servlet.DispatcherServlet 
    
    
    
    
     contextConfigLocation
     
    
     classpath:/spring_servlet.xml
     
    
   
    1
    
  
    
    
   
   
    spring
    
   
    /
    
  
    
    
   
   
    default
    
   
    *.js
    
  

 
3.在src下添加springmvc.xml的配置
	-->建议复制标准配置,然后修改即可
    
 

 
    
    
  
    
  
    
    
   
    
    
    
  
	
  	
 
   
    
     
      
       
        
        
         text/html;charset=UTF-8
         
        
       
      
     
    
  
    

 
4.创建普通类,添加控制器@Controller注解,并在方法添加@RequestMapping注解即可
package org.jxnd.controller;

import javax.validation.Valid;

import org.jxnd.bean.User;
import org.springframework.stereotype.Controller;
import org.springframework.validation.BindingResult;
import org.springframework.validation.ObjectError;
import org.springframework.web.bind.annotation.ModelAttribute;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.bind.annotation.SessionAttributes;

@Controller
@SessionAttributes(value={"aaa","info"})
public class UserController {

	@RequestMapping(value = "/dd")
	public String dd() {
		return "default";
	}

	@RequestMapping(value = "/test1/{name}/{id}")
	public String test1(@PathVariable("name") String name, @PathVariable("id") String id) {
		System.out.println("name:" + name + "id:" + id);
		return "index";
	}

	@RequestMapping(value = "/test2")
	public String test2(@RequestParam(value = "cba", required = false, defaultValue = "000") String id) {
		System.out.println("id: " + id);
		return "index";
	}

	@RequestMapping(value = "/test3")
	public String test3(User user) {
		System.out.println(user);
		return "index";
	}

	@RequestMapping(value = "/ajax", produces = "text/plain;charset=utf-8")
	@ResponseBody
	public String ajax(String name, String password) {
		System.out.println("name:" + name + "  password:" + password);
		return "我是ajax返回的信息：" + name + "密码：" + password;
	}

	@ModelAttribute("info")
	public User getUser() {
		return new User();
	}

	@RequestMapping(value = "/test4")
	public String test4(@Valid @ModelAttribute("info") User info, BindingResult br) {
		System.out.println(br.getErrorCount());
		for (ObjectError oe : br.getAllErrors()) {
			System.out.println(oe.getDefaultMessage());
		}
		return "default";
	}

}