SpringMVC - RESTful learning

What is RESTful?

REST: Representational State Transfer (Representational State Transfer)
REST is not an innovative technology, which refers to a set of architectural constraints and principles
Subject to the constraints and principles of REST architecture, call it RESTful architecture

RESTful core

Resources and URI
Resource representations
State transition

RESTful architectural features

Unified client interface to access resources
url more concise, easy to understand, easy to expand.
Conducive to the sharing of resources between different systems

RESTful style Overview

Specifically, four forms is RESTful HTTP protocol indicates four basic operations

GET: access to resources
POST: New Resource
PUT: Modify Resources
DELETE: Delete Resource

RESTful development style:

查询课程: http://localhost:8080/id method='get'
添加课程: http://localhost:8080/course method= 'post'
删除课程: http://localhost:8080/id method='delete'
修改课程: http://localhost:8080/course method='put'

Real

springmvc.xml located:

<?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:mvc="http://www.springframework.org/schema/mvc"
       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/mvc
       http://www.springframework.org/schema/mvc/spring-mvc-3.2.xsd">

    <mvc:annotation-driven >
        <!-- 消息转换器 -->
        <mvc:message-converters register-defaults="true">
            <bean class="org.springframework.http.converter.json.MappingJackson2HttpMessageConverter"></bean>
        </mvc:message-converters>
    </mvc:annotation-driven>

	<!-- 配置自动扫描 -->
    <context:component-scan base-package="com.oym"></context:component-scan>

    <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name="prefix" value="/"></property>
        <property name="suffix" value=".jsp"></property>
    </bean>

</beans>

controller Code:

@Controller
public class CourseController {

    @Autowired
    private CourseDAO courseDAO;

    /**
     * 添加课程
     */
    @PostMapping(value = "/add")
    public String add(Course course){
        courseDAO.add(course);
        return "redirect:/getAll";
    }

    /**
     * 查询全部课程
     * @return
     */
    @GetMapping(value = "/getAll")
    public ModelAndView getAll(){
        ModelAndView modelAndView = new ModelAndView();
        modelAndView.setViewName("index");
        modelAndView.addObject("courses",courseDAO.getAll());
        return modelAndView;
    }

    /**
     * 通过id查询课程
     */
    @GetMapping(value = "/getById/{id}")
    public ModelAndView getById(@PathVariable(value = "id") int id){
        ModelAndView modelAndView = new ModelAndView();
        modelAndView.setViewName("edit");
        modelAndView.addObject("course",courseDAO.getById(id));
        return modelAndView;
    }

    /**修改课程
     *
     */
    @PutMapping(value = "/update")
    public String update(Course course){
        courseDAO.update(course);
        return "redirect:/getAll";
    }

    /**
     * 删除课程
     */
    @DeleteMapping(value = "/delete/{id}")
    public String delete(@PathVariable(value = "id")  int id){
        courseDAO.deleteById(id);
        return "redirect:/getAll";
    }

}

Displays information page Index.jsp achieve:

<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<%@ page isELIgnored="false" %>
<%@taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%>
<html>
<head>
    <title>课程列表</title>
    <link href="${pageContext.request.contextPath}/css/bootstrap.min.css" rel="stylesheet">
</head>
<body>
<div class="container">

    <!-- 标题 -->
    <div class="row">
        <div class="col-md-12">
            <h1>课程管理</h1>
        </div>
    </div>
    <!-- 显示表格数据 -->
    <div class="row">
        <div class="col-md-12">
            <table class="table table-hover" id="emps_table">
                <thead>
                <tr>
                    <th>
                        <input type="checkbox" id="check_all"/>
                    </th>
                    <th>编号</th>
                    <th>课程名</th>
                    <th>价格</th>
                    <th>编辑</th>
                    <th>删除</th>
                </tr>
                </thead>
                <tbody>
                <c:forEach items="${courses}" var="course">
                    <tr>
                        <td><input type='checkbox' class='check_item'/></td>
                        <td>${course.id}</td>
                        <td>${course.name}</td>
                        <td>${course.price}</td>
                        <td>
                            <form action="${pageContext.request.contextPath}/getById/${course.id}" method="get">
                                <button class="btn btn-primary btn-sm edit_btn" type="submit">
                                    <span class="glyphicon glyphicon-pencil">编辑</span>
                                </button>
                            </form>
                        </td>
                        <td>
                            <form action="${pageContext.request.contextPath}/delete/${course.id}" method="post">
                                <button class="btn btn-danger btn-sm delete_btn" type="submit">
                                    <input type="hidden" name="_method" value="DELETE"/>
                                    <span class="glyphicon glyphicon-trash">删除</span>
                                </button>
                            </form>
                        </td>
                    </tr>
                </c:forEach>
                </tbody>
            </table>
        </div>
    </div>

</div>
</body>
</html>

Add information page add.jsp:

<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<%@ page isELIgnored="false" %>
<html>
<head>
    <title>add</title>
    <link href="${pageContext.request.contextPath}/css/bootstrap.min.css" rel="stylesheet">
    <style type="text/css">
        body{
            overflow-x:hidden;
        }
        #main{
            width:1200px;
            height:600px;
            margin-left:500px;
        }
    </style>
</head>
<body>

<div id="main">
    <!-- 标题 -->
    <div class="row">
        <div class="col-md-12">
            <h1>添加课程</h1>
        </div>
    </div>

    <form class="form-horizontal" role="form" action="${pageContext.request.contextPath}/add" method="post">
        <div class="form-group">
            <label class="col-sm-1 control-label">课程编号</label>
            <div class="col-sm-3">
                <input type="text" class="form-control" name="id" placeholder="请输入课程编号">
            </div>
        </div>
        <div class="form-group">
            <label class="col-sm-1 control-label">课程名称</label>
            <div class="col-sm-3">
                <input type="text" class="form-control" name="name" placeholder="请输入课程名称">
            </div>
        </div>
        <div class="form-group">
            <label class="col-sm-1 control-label">课程价格</label>
            <div class="col-sm-3">
                <input type="text" class="form-control" name="price" placeholder="请输入课程价格">
            </div>
        </div>
        <div class="form-group">
            <div class="col-sm-offset-1 col-sm-3">
                <button type="submit" class="btn btn-default">提交</button>
            </div>
        </div>
    </form>
</div>
</body>
</html>

Edit Information page edit.jsp:

<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<%@ page isELIgnored="false" %>
<html>
<head>
    <title>add</title>
    <link href="${pageContext.request.contextPath}/css/bootstrap.min.css" rel="stylesheet">
    <style type="text/css">
        body{
            overflow-x:hidden;
        }
        #main{
            width:1200px;
            height:600px;
            margin-left:500px;
        }
    </style>
</head>
<body>

<div id="main">
    <!-- 标题 -->
    <div class="row">
        <div class="col-md-12">
            <h1>修改课程</h1>
        </div>
    </div>

    <form class="form-horizontal" role="form" action="${pageContext.request.contextPath}/update" method="post">
        <div class="form-group">
            <label class="col-sm-1 control-label">课程编号</label>
            <div class="col-sm-3">
                <input type="text" value="${course.id}" name="id" readonly="readonly" class="form-control">
            </div>
        </div>
        <div class="form-group">
            <label class="col-sm-1 control-label">课程名称</label>
            <div class="col-sm-3">
                <input type="text" value="${course.name}" name="name" class="form-control">
            </div>
        </div>
        <div class="form-group">
            <label class="col-sm-1 control-label">课程价格</label>
            <div class="col-sm-3">
                <input type="text" value="${course.price}" name="price" class="form-control">
            </div>
        </div>
        <div class="form-group">
            <div class="col-sm-offset-1 col-sm-3">
                <input type="hidden" name="_method" value="PUT"/>
                <button type="submit" class="btn btn-default">提交</button>
            </div>
        </div>
    </form>
</div>
</body>
</html>

Achieve page display
Note: Restful instance only in order to achieve the function, did not consider some data safety inspection problems

Mr.OO

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Private letter concerns

SpringMVC - RESTful learning

What is RESTful?

RESTful core

RESTful architectural features

RESTful style Overview

Real

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