springmvc案例

女爷i 2022-12-14 03:59 125阅读 0赞

这里用的是假数据，list集合。

代码如下：

## person ##

/** * Created by 李柏霖 * 2020/10/13 9:47 */
    
    package com.lbl.domain;
    
    public class Person { 
        private Integer id;
        private String username;
        private Integer age;
        private String addr;
    
        public Person(Integer id, String username, Integer age, String addr) { 
            this.id = id;
            this.username = username;
            this.age = age;
            this.addr = addr;
        }
    
        public Integer getId() { 
            return id;
        }
    
        public void setId(Integer id) { 
            this.id = id;
        }
    
        public String getUsername() { 
            return username;
        }
    
        public void setUsername(String username) { 
            this.username = username;
        }
    
        public Integer getAge() { 
            return age;
        }
    
        public void setAge(Integer age) { 
            this.age = age;
        }
    
        public String getAddr() { 
            return addr;
        }
    
        public void setAddr(String addr) { 
            this.addr = addr;
        }
    }

## db ##

/** * Created by 李柏霖 * 2020/10/13 9:48 */
    
    package com.lbl.Utils;
    
    import com.lbl.domain.Person;
    
    import java.util.ArrayList;
    import java.util.List;
    
     public class Db { 
    
        public static List<Person> findAll() { 
            List<Person> list = new ArrayList<Person>();
            list.add(new Person(1,"李柏霖1",18,"湖南郴州"));
            list.add(new Person(1,"李柏霖2",18,"湖南郴州"));
            list.add(new Person(1,"李柏霖3",18,"湖南郴州"));
            list.add(new Person(1,"李柏霖4",18,"湖南郴州"));
            list.add(new Person(1,"李柏霖5",18,"湖南郴州"));
            list.add(new Person(1,"李柏霖6",18,"湖南郴州"));
            return list;
        }
    
    
    }

## PersonController ##

/** * Created by 李柏霖 * 2020/10/13 10:18 */
    
    package com.lbl.Controller;
    
    import com.lbl.Utils.Db;
    import com.lbl.domain.Person;
    import org.springframework.stereotype.Controller;
    import org.springframework.web.bind.annotation.RequestMapping;
    import org.springframework.web.servlet.ModelAndView;
    
    import java.util.List;
    
    @Controller
    public class PersonController { 
    
        @RequestMapping("list.action")
        public ModelAndView findAll(){ 
            //1获取
            //2转发到页面
            //3在页面上进行forEach循环
            List<Person> list = Db.findAll();
            ModelAndView mv = new ModelAndView();
            mv.addObject("list",list);
            mv.setViewName("jsp/list.jsp");
            return mv;
        }
    }

## springmvc.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" 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-3.0.xsd">
    
    	//扫描指定包中有@Controller注解的类，然后加入到ioc中
        <context:component-scan base-package="com.lbl.Controller"></context:component-scan>
    
    </beans>

## web.xml ##

<!DOCTYPE web-app PUBLIC "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN" "http://java.sun.com/dtd/web-app_2_3.dtd" >
    
    <web-app>
      <display-name>Archetype Created Web Application</display-name>
      <servlet>
        <servlet-name>DispatcherServlet</servlet-name>
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
        <init-param>
          <param-name>contextConfigLocation</param-name>
          <param-value>classpath:springmvc.xml</param-value>
        </init-param>
        <load-on-startup>1</load-on-startup>
      </servlet>
      <servlet-mapping>
        <servlet-name>DispatcherServlet</servlet-name>
        <url-pattern>*.action</url-pattern>
      </servlet-mapping>
    
    </web-app>

## list.jsp ##

<%--
      Created by IntelliJ IDEA.
      User: Carlos
      Date: 2020/10/13
      Time: 10:24
      To change this template use File | Settings | File Templates.
    --%>
    <%@ page contentType="text/html;charset=UTF-8" language="java" isELIgnored="false" %>
    <%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
    <html>
    <head>
        <title>Title</title>
    </head>
    <body>
    <table border="1px" width="100%">
        <tr>
            <td>编号</td>
            <td>名字</td>
            <td>年龄</td>
            <td>地址</td>
        </tr>
    <c:forEach items="${list}" var="item">
        <tr>
            <td>${item.id}</td>
            <td>${item.username}</td>
            <td>${item.age}</td>
            <td>${item.addr}</td>
        </tr>
    </c:forEach>
    </table>
    </body>
    </html>

## 页面效果： ##

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzM3OTI0OTA1_size_16_color_FFFFFF_t_70_pic_center]

[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzM3OTI0OTA1_size_16_color_FFFFFF_t_70_pic_center]: /images/20221123/81817e92a30a458991e96cf46389a9f2.png