springmvc注解映射器和适配器配置

springmvc注解映射器和适配器配置

环境搭建

请参考：http://blog.csdn.net/leisure_life/article/details/72832698

创建bean

Items .java

package com.ld.springmvc.po;
import java.util.Date;
public class Items { 
    private Integer id;
    private String name;
    private Float price;
    private String pic;
    private Date createtime;
    private String detail;
    public Integer getId() {
        return id;
    }
    public void setId(Integer id) {
        this.id = id;
    }
    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name == null ? null : name.trim();
    }
    public Float getPrice() {
        return price;
    }
    public void setPrice(Float price) {
        this.price = price;
    }
    public String getPic() {
        return pic;
    }
    public void setPic(String pic) {
        this.pic = pic == null ? null : pic.trim();
    }
    public Date getCreatetime() {
        return createtime;
    }
    public void setCreatetime(Date createtime) {
        this.createtime = createtime;
    }
    public String getDetail() {
        return detail;
    }
    public void setDetail(String detail) {
        this.detail = detail == null ? null : detail.trim();
    }
}

创建spring配置文件

spring.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" xmlns:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx" 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.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop.xsd">
 </beans>

配置前端控制器

在web.xml中配置

<?xml version="1.0" encoding="UTF-8"?>
<web-app version="3.0" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd">
    <!-- springmvc前端控制器 -->
  <servlet>
    <servlet-name>beautiful</servlet-name>
    <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
    <!-- 配置springmvc加载的配置文件（配置处理器映射器、适配器等） -->
    <init-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>classpath:springmvc.xml</param-value>
    </init-param>
  </servlet>
  <servlet-mapping>
    <servlet-name>beautiful</servlet-name>
    <url-pattern>*.action</url-pattern>
  </servlet-mapping>
</web-app>

编写处理器

ItemsController.java

package com.ld.springmvc.controller;
/** * Handler */
import java.util.ArrayList;
import java.util.List;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.servlet.ModelAndView;
import com.ld.springmvc.po.Items;
public class ItemsController{
    //编写商品查询方法
    public ModelAndView findItemsList()throws Exception{
        List<Items> itemsList = new ArrayList<Items>();
        Items item = new Items();
        item.setName("旺仔");
        item.setPrice(10f);
        Items item1 = new Items();
        item1.setName("旺1仔");
        item1.setPrice(11f);
        Items item2 = new Items();
        item2.setName("旺仔");
        item2.setPrice(10f);
        Items item3 = new Items();
        item3.setName("旺2仔");
        item3.setPrice(10f);
        itemsList.add(item);
        itemsList.add(item1);
        itemsList.add(item2);
        itemsList.add(item3);
        ModelAndView modelAndView = new ModelAndView();
        //类似于request的setAttribute
        modelAndView.addObject("itemsList", itemsList);
        //指定视图
        modelAndView.setViewName("/WEB-INF/jsp/items/itemsList.jsp");
        return modelAndView;
    }
}

配置处理器映射器

spring.xml中配置

<bean class="org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerMapping"/>

配置处理器适配器

spring.xml中配置

<bean class="org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter"/>

处理器添加注解

package com.ld.springmvc.controller;
/** * 注解的Handler */
import java.util.ArrayList;
import java.util.List;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.servlet.ModelAndView;
import com.ld.springmvc.po.Items;
@Controller         //标识它是一个处理器
public class ItemsController{
    //编写商品查询方法
    @RequestMapping("/findItemsList.action")//建议将url与方法名一致。实现的是方法findItemsList与url进行映射
    public ModelAndView findItemsList()throws Exception{
        List<Items> itemsList = new ArrayList<Items>();
        Items item = new Items();
        item.setName("旺仔");
        item.setPrice(10f);
        Items item1 = new Items();
        item1.setName("旺1仔");
        item1.setPrice(11f);
        Items item2 = new Items();
        item2.setName("旺仔");
        item2.setPrice(10f);
        Items item3 = new Items();
        item3.setName("旺2仔");
        item3.setPrice(10f);
        itemsList.add(item);
        itemsList.add(item1);
        itemsList.add(item2);
        itemsList.add(item3);
        ModelAndView modelAndView = new ModelAndView();
        //类似于request的setAttribute
        modelAndView.addObject("itemsList", itemsList);
        //指定视图
        modelAndView.setViewName("/WEB-INF/jsp/items/itemsList.jsp");
        return modelAndView;
    }
}

配置处理器

在spring.xml中使用组件扫描器

<!-- 对于注解的Handler可以单个配置 实际开发中建议使用组件扫描 -->
         <context:component-scan base-package="com.ld.springmvc.controller"/>

编写前端页面

itemsList.jsp

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<% response.setContentType("text/html;charset = GB2312"); request.setCharacterEncoding("gb2312"); %>
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>
<%@ taglib uri="http://java.sun.com/jsp/jstl/fmt" prefix="fmt" %>
<% String path = request.getContextPath(); String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/"; %>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
  <head>
    <base href="<%=basePath%>">
    <title>查询商品列表</title>
    <meta http-equiv="pragma" content="no-cache">
    <meta http-equiv="cache-control" content="no-cache">
    <meta http-equiv="expires" content="0">    
    <meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
    <meta http-equiv="description" content="This is my page">
    <!-- <link rel="stylesheet" type="text/css" href="styles.css"> -->
  </head>
  <body>
    <form action="${pageContext.request.contextPath }/item/queryItem.action" method="post">
        查询条件
        <table width="100%" border="1">
            <tr>
                <td><input type="submit" value="查询" /></td>
            </tr>
        </table>
        商品列表：
        <table width="100%" border="1">
            <tr>
                <td>商品名称</td>
                <td>商品价格</td>
                <td>生产日期</td>
                <td>商品描述</td>
                <td>操作</td>
            </tr>
            <c:forEach items="${itemsList }" var="item">
            <tr>
                <td>${item.name }</td>
                <td>${item.price }</td>
                <td><fmt:formatDate value="${item.createtime }" pattern="yyyy-MM-dd HH:mm:ss" /></td>
                <td>${item.detail }</td>
                <td><a href="${pageContext.request.contentType }/item/editItem.action?id=${item.id}">修改</a></td>
            </tr>
            </c:forEach>
        </table>
    </form>
  </body>
</html>

配置视图解析器

在spring.xml中配置视图解析器

<!-- 视图解析器 配置解析jsp的视图解析器,默认使用jstl标签 -->
        <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver" />

测试

测试路径：http://127.0.0.1/springmvc_annotation/findItemsList.action

" class="reference-link">测试结果