Spring MVC学习初篇

Spring mvc 使用配置:

 <!-- 使用MVC -->
  <servlet>
      <servlet-name>defaultDispatcher</servlet-name>
      <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
      <init-param>
          <param-name>contextConfigLocation</param-name>
          <!-- Spring XML 文件 -->
          <param-value>classpath:school-context.xml</param-value>
      </init-param>
      <load-on-startup>1</load-on-startup>
  </servlet>
  <servlet-mapping>
      <servlet-name>defaultDispatcher</servlet-name>
      <url-pattern>/*</url-pattern>
  </servlet-mapping>

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"  
 xmlns:context="http://www.springframework.org/schema/context"  
 xmlns:p="http://www.springframework.org/schema/p"  
 xmlns:mvc="http://www.springframework.org/schema/mvc"  
 xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"  
 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.xsd  
      http://www.springframework.org/schema/mvc  
      http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd">

    <bean name="/test1/helloworld" class="com.yinuo.web.controller.HelloWorldController" />
    
    <bean id="viewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name="prefix" value="/"></property>
        <property name="suffix" value=".jsp"></property>
    </bean>
 </beans>

　　访问静态资源（js、css、img等）

<!-- 访问静态资源   -->
<mvc:resources location="/js/" mapping="/js/**"/>
<mvc:resources location="/img/" mapping="/img/**"/>
<mvc:resources location="/css/" mapping="/css/**"/>

Spring mvc 注解:

<!-- 注解扫描包 -->
    <context:component-scan base-package="cn.com.yinuo.school"></context:component-scan>
    
    <!-- 开启注解 -->
    <mvc:annotation-driven/>
    <!-- 上面开启注解的方式是下面开启注解方式的优化，下面的方式在3之后就过时了 -->
    <!--  
        <bean class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter" />
        <bean class="org.springframework.web.servlet.mvc.annotation.DefaultAnnotationHandlerMapping"></bean>
     -->

@Controller
@RequestMapping("/book")
public class UserController {
    
    @RequestMapping(value="/addBook",method=RequestMethod.POST)
    public ModelAndView addBook(){
        String result ="this is addBook------";
        return new ModelAndView("/bookList","result",result);
    }
    @RequestMapping(value="/delBook",method=RequestMethod.GET)
    public ModelAndView delUser(){
        String result ="this is delBook------";
        return new ModelAndView("/bookList","result",result);
    }
　　 //去掉method=RequestMethod.GET /.POST表示两者皆可
    @RequestMapping("/updateBook")
    public String updateBook(){
        return "/bookList";
    }
}

Spring 参数传递：

　　单个域传递：

　　Controller方法的参数名字与表单域的名字一致，即可直接获得表单的数据

　　对象封装传递：

　　封装到一个bean里面。bean的属性名与表单域的name属性名称一致，并且bean提供getter和setter方法，在controller即可直接bean.getXxx()获得。

　　json传递　

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
   
<%@taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<script type="text/javascript" src="../js/jquery-1.7.1.min.js"></script>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>新增书籍</title>
<script type="text/javascript">
    $(document).ready(function(){
        $("#add").click(function(){
            var bookName = $("#bookName").attr("value");
            var price =$("#price").attr("value");
            var book = {bookName:bookName,price:price};
            $.ajax({
                url:"/book/addBook",
                type:"post",
                data:book,
                success:function(bk){
                    console.info("bookName--->" + bk.bookName + "price--->" + bk.price );
                }
            });
        });
    });
</script>
</head>
<body>
    <h>新增书籍</h>
    书名<input type="text" id="bookName" name="bookName">
    价格<input type="text" id="price" name="price">
    <input type="button" id="add" value="新增">
</body>
</html>

@Controller
@RequestMapping("/book")
public class BookController {
    @RequestMapping("/addBook")
    public void addUserJson(Book book,HttpServletRequest request,HttpServletResponse response){
        String result = "{"bookName":" "+ book.getBookName() +" ","price":" "+ book.getPrice()+" "}";
        PrintWriter out = null;
        response.setContentType("application/json");
        try {
            out = response.getWriter();
            out.write(result);
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}