SpringMVC web 注解实现

标签: java

SpringMVC web 注解实现

1,配置web.xml

实现将所有的web访问引入到SpringMVC框架中

<servlet>
        <servlet-name>aaa</servlet-name>
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>

        <init-param>
            <param-name>contextConfigLocation</param-name>
            <param-value>classpath:spring-mvc.xml</param-value>
        </init-param>
    </servlet>

    <servlet-mapping>
        <servlet-name>aaa</servlet-name>
        <url-pattern>/</url-pattern>
</servlet-mapping>

2,引入maven的依赖

<project xmlns="http://maven.apache.org/POM/4.0.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>com.star</groupId>
    <artifactId>StarShow</artifactId>
    <version>1.0-SNAPSHOT</version>
    <!--将当前工程打包为web-->
    <packaging>war</packaging>


    <build>
        <!--引入maven插件-->
        <plugins>
            <!-- define the project compile level -->
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <version>3.6.1</version>
                <configuration>
                    <source>1.8</source>
                    <target>1.8</target>
                </configuration>
            </plugin>

            <!-- 添加tomcat插件 -->
            <plugin>
                <groupId>org.apache.tomcat.maven</groupId>
                <artifactId>tomcat7-maven-plugin</artifactId>
                <version>2.2</version>
                <configuration>
                    <path>/</path>
                    <port>8080</port>
                </configuration>
            </plugin>
        </plugins>
    </build>
    <dependencies>
        <!--引入junit单元测试依赖-->
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>4.12</version>
        </dependency>
        <!--引入SpringContext的依赖-->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-context</artifactId>
            <version>4.3.6.RELEASE</version>
        </dependency>
        <!--引入SpringWebMVC的依赖-->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-webmvc</artifactId>
            <version>4.3.6.RELEASE</version>
        </dependency>
        <!--引入AspectJ框架(xml方式)实现aop(可不用)-->
        <dependency>
            <groupId>org.aspectj</groupId>
            <artifactId>com.springsource.org.aspectj.weaver</artifactId>
            <version>1.6.8.RELEASE</version>
        </dependency>
       	<!--引入jsp的依赖-->
        <dependency>
            <groupId>javax.servlet.jsp</groupId>
            <artifactId>jsp-api</artifactId>
            <version>2.2</version>
            <scope>provided</scope>
        </dependency>
        <!--引入servlet的依赖-->
        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>javax.servlet-api</artifactId>
            <version>3.0.1</version>
            <scope>provided</scope>
        </dependency>
        <!--引入jstl的依赖-->
        <dependency>
            <groupId>jstl</groupId>
            <artifactId>jstl</artifactId>
            <version>1.2</version>
        </dependency>
        <!--mysql-->
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>5.0.4</version>
        </dependency>
    </dependencies>

</project>

3,配置Spring-MVC.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:mvc="http://www.springframework.org/schema/mvc"
       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/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd">
    <!--配置视图路径,自动在前面添加部分路径-->
    <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <!--在前面添加路径 例子:WEB-INF/view/show.jsp-->
        <property name="prefix" value="/WEB-INF/view/"/>
    </bean>
    <!--配置默认的servlet,静态资源可以直接访问-->
    <mvc:default-servlet-handler/>
    <!--上下文组件扫描,扫描指定包内的组件-->
    <context:component-scan base-package="com.star.controller"/>
    <!--配置注解驱动,使得Spring的注解可以使用-->
    <mvc:annotation-driven/>
    <!--配置MessageSource,消息源,存储properties-->
    <bean id="messageSource" class="org.springframework.context.support.ReloadableResourceBundleMessageSource">
        <property name="basename" value="/WEB-INF/msg" />
    </bean>
</beans>

4,创建数据库

create table shows(
id int primary key auto_increment,
name varchar(100) not null,
author varchar(50) not null,
publish varchar(100) not null,
price double not null);

5,创建show.jsp updata.jsp add.jsp err.jsp

使用bootstop框架,jstl,web的http://www.springframework.org/tags/form

<%--
  Created by IntelliJ IDEA.
  User: Administrator
  Date: 2020/3/4
  Time: 21:16
  To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<%@ page errorPage="err.jsp" %>
<html>
<head>
    <meta charset="utf-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1">
    <title>welcome</title>
    <link href="https://cdn.jsdelivr.net/npm/[email protected]/dist/css/bootstrap.min.css" rel="stylesheet">
</head>
<body>
<div class="container-fluid">
    <div class="row">
        <div class="col-md-4 col-md-offset-4">
            <table class="table">
                <tr>
                    <td><a href="/add">add</a></td>
                </tr>
                <tr>
                    <td>id</td>
                    <td>name</td>
                    <td>author</td>
                    <td>publish</td>
                    <td>price</td>
                    <td>manage</td>
                </tr>
                <c:forEach items="${showlist}" var="s">
                    <tr>
                        <td>&nbsp; ${s.id}</td>
                        <td>&nbsp; ${s.name}</td>
                        <td>&nbsp; ${s.author}</td>
                        <td>&nbsp; ${s.publish}</td>
                        <td>&nbsp; ${s.price}</td>
                        <td>&nbsp; <a href="/show/showDelete/${s.id}">delete</a>&nbsp;<a href="/show/showSelectOne/${s.id}">updata</a></td>
                    </tr>
                </c:forEach>
            </table>
        </div>
    </div>
</div>


<script src="https://cdn.jsdelivr.net/npm/[email protected]/dist/jquery.min.js"></script>
<script src="https://cdn.jsdelivr.net/npm/[email protected]/dist/js/bootstrap.min.js"></script>
</body>
</html>

<%--
  Created by IntelliJ IDEA.
  User: Administrator
  Date: 2020/3/4
  Time: 21:16
  To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<%@ page errorPage="err.jsp" %>
<html>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<%@ taglib prefix="f" uri="http://www.springframework.org/tags/form" %>
<html>
<head>
    <meta charset="utf-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1">
    <title>welcome</title>
    <link href="https://cdn.jsdelivr.net/npm/[email protected]/dist/css/bootstrap.min.css" rel="stylesheet">
</head>
<body>
<div class="container-fluid">
    <div class="row">
        <div class="col-md-4 col-md-offset-4">
            <f:form method="post" action="/show/showUpdate" commandName="show">
                id:<f:input path="id" readonly="true"/><font color="red"><f:errors path="id" /></font> <br>
                name:<f:input path="name" /><f:errors path="name" /><br>
                author:<f:input path="author" /><f:errors path="author" /><br>
                publish:<f:input path="publish" /><f:errors path="publish" /><br>
                price:<f:input path="price" /><f:errors path="price" /><br>
                <input type="submit" value="submit" /> <br>
            </f:form>
        </div>
    </div>
</div>


<script src="https://cdn.jsdelivr.net/npm/[email protected]/dist/jquery.min.js"></script>
<script src="https://cdn.jsdelivr.net/npm/[email protected]/dist/js/bootstrap.min.js"></script>
</body>
</html>

<%--
  Created by IntelliJ IDEA.
  User: Administrator
  Date: 2020/3/8
  Time: 10:12
  To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<%@ page errorPage="err.jsp" %>
<html>
<head>
    <meta charset="utf-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1">
    <title>welcome</title>
    <link href="https://cdn.jsdelivr.net/npm/[email protected]/dist/css/bootstrap.min.css" rel="stylesheet">
</head>
<body>
<div class="container-fluid">
    <div class="row">
        <div class="col-md-4 col-md-offset-4">
            <form role="form" method="post" action="/show/showInsert">
                <div class="form-group">
                    <label for="name">书名</label>
                    <input type="text" class="form-control" id="name" placeholder="name" name="name">
                </div>
                <div class="form-group">
                    <label for="name">作者</label>
                    <input type="text" class="form-control" placeholder="name" name="author">
                </div>
                <div class="form-group">
                    <label for="name">出版社</label>
                    <input type="text" class="form-control" placeholder="name" name="publish">
                </div>
                <div class="form-group">
                    <label for="name">价格</label>
                    <input type="text" class="form-control" placeholder="name" name="price">
                </div>
                <button type="submit" class="btn btn-default">提交</button>
            </form>
        </div>
    </div>
</div>
<script src="https://cdn.jsdelivr.net/npm/[email protected]/dist/jquery.min.js"></script>
<script src="https://cdn.jsdelivr.net/npm/[email protected]/dist/js/bootstrap.min.js"></script>
</body>
</html>
<%--
  Created by IntelliJ IDEA.
  User: Administrator
  Date: 2020/3/8
  Time: 9:58
  To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<%@ page errorPage="err.jsp" isErrorPage="true" %>
<html>
<head>
    <title>Title</title>
</head>
<body>
<h1>sorry i can not</h1>
</body>
</html>

6,创建bean下的Show

与数据库中字段相同

package com.star.bean;

/**
 * Created by Administrator on 2020/3/4.
 */
public class Show {
    private int id;
    private String name;
    private String author;
    private String publish;
    private double price;


    public Show() {
    }

    public Show(int id, String name, String author, String publish, double price) {

        this.id = id;
        this.name = name;
        this.author = author;
        this.publish = publish;
        this.price = price;
    }

    public int getId() {
        return id;
    }

    public void setId(int id) {
        this.id = id;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public String getAuthor() {
        return author;
    }

    public void setAuthor(String author) {
        this.author = author;
    }

    public String getPublish() {
        return publish;
    }

    public void setPublish(String publish) {
        this.publish = publish;
    }

    public double getPrice() {
        return price;
    }

    public void setPrice(double price) {
        this.price = price;
    }
}

7,创建PathController

访问通配,不写比较好。

package com.star.controller;

import org.springframework.stereotype.Component;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;

import java.nio.file.Path;

/**
 * Created by Administrator on 2020/3/4.
 */
@Component //代表当前为控制器组件
public class PathController {
    @RequestMapping("/{path}")//获取任何的地址请求
    public String goPath(@PathVariable String path){//将当前路径的最后一部分路径作为参数取值
        return path;
    }
}

8.创建ShowController

实现对show的操作控制

package com.star.controller;

import com.star.bean.Show;
import com.star.server.ShowServer;
import com.star.server.impl.ShowServerImpl;
import com.star.validate.ShowValidate;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.validation.BindingResult;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;

import java.util.List;

/**
 * Created by Administrator on 2020/3/4.
 */
@Controller
@RequestMapping("/show")
public class ShowController {
    @RequestMapping("/showInsert")
    public String showInsert(Show show) {
        ShowServer ss = new ShowServerImpl();
        int res = ss.insert(show);
        if (res > 0)
            return "redirect:/show/showSelect";
        else
            return "err.jsp";
    }

    @RequestMapping("/showSelect")
    public String showSelect(Model model) {
        ShowServer ss = new ShowServerImpl();
        List<Show> list = ss.select();
        model.addAttribute("showlist", list);
        return "show.jsp";

    }

    @RequestMapping("/showSelectOne/{id}")
    public String showSelectOne(@PathVariable int id, Model model) {
        ShowServer ss = new ShowServerImpl();
        Show show = ss.selectOne(id);
        model.addAttribute("show", show);
        return "update.jsp";
    }

    @RequestMapping("/showUpdate")
    public String showUpdate(Show show, BindingResult err,Model model){
        ShowValidate sv = new ShowValidate();
        sv.validate(show,err);
        if (err.hasErrors()){
            model.addAttribute("show",show);
            return "update.jsp";
        }
        ShowServer ss = new ShowServerImpl();
        int a = ss.update(show);
        if (a > 0) {
            return "redirect:/show/showSelect";
        } else
            return "err.jsp";
    }

    @RequestMapping("/showDelete/{id}")
    public String showDelete(@PathVariable int id) {
        ShowServer ss = new ShowServerImpl();
        int res = ss.delete(id);
        if (res > 0)
            return "redirect:/show/showSelect";
        else
            return "err.jsp";
    }
}

9,创建servlet,servletimpl

package com.star.server;

import com.star.bean.Show;

import java.util.List;

/**
 * Created by Administrator on 2020/3/4.
 */
public interface ShowServer {
    Show selectOne(int id);
    List<Show> select();
    int insert(Show s);
    int delete(int id);
    int update(Show s);
}

package com.star.server.impl;

import com.star.bean.Show;
import com.star.dao.ShowDao;
import com.star.dao.impl.ShowDaoImpl;
import com.star.server.ShowServer;

import java.util.List;

/**
 * Created by Administrator on 2020/3/4.
 */
public class ShowServerImpl implements ShowServer {
    @Override
    public Show selectOne(int id) {
        ShowDao sd= new ShowDaoImpl();
        return sd.selectOne(id);
    }

    @Override
    public List<Show> select() {
        ShowDao sd = new ShowDaoImpl();
        List<Show> list = sd.select();
        return list;
    }

    @Override
    public int insert(Show s) {
        ShowDao sd = new ShowDaoImpl();
        return sd.insert(s);
    }

    @Override
    public int delete(int id) {
        ShowDao sd = new ShowDaoImpl();
        return sd.delete(id);
    }

    @Override
    public int update(Show s) {
        ShowDao sd = new ShowDaoImpl();
        return sd.update(s);
    }
}

11,创建dbtools

连接数据库的工具类

package com.star.util;

import java.sql.*;

/**
 * Created by Administrator on 2020/3/4.
 */
public class DBtools {
    public static Connection getConn(){
        try {
            Class.forName("com.mysql.jdbc.Driver");
            return DriverManager.getConnection("jdbc:mysql://localhost:3306/star","root","123456");
        } catch (Exception e) {
            e.printStackTrace();
        }
        return null;
    }
    public static void close(Connection conn, ResultSet result, PreparedStatement state){

        try {
            if (result != null) {
                result.close();
            }
        } catch (SQLException e) {
            e.printStackTrace();
        } finally {
            try {
                if (conn != null) {
                    conn.close();
                }
            } catch (SQLException e) {
                e.printStackTrace();
            } finally {
                try {
                    if (state != null) {
                        state.close();
                    }
                } catch (SQLException e) {
                    e.printStackTrace();
                }
            }
        }
    }

}

10.创建dao,daoimpl

​ 连接数据库

package com.star.dao;

import com.star.bean.Show;

import java.util.List;

/**
 * Created by Administrator on 2020/3/4.
 */
public interface ShowDao {
    Show selectOne(int id);
    List<Show> select();
    int insert(Show s);
    int delete(int id);
    int update(Show s);
}

package com.star.dao.impl;

import com.star.bean.Show;
import com.star.dao.ShowDao;
import com.star.util.DBtools;
import com.sun.org.apache.xpath.internal.WhitespaceStrippingElementMatcher;

import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.ArrayList;
import java.util.List;

/**
 * Created by Administrator on 2020/3/4.
 */
public class ShowDaoImpl implements ShowDao {
    private Connection conn;
    private PreparedStatement ps;
    private ResultSet rs;

    @Override
    public Show selectOne(int id) {
        conn = DBtools.getConn();
        try {
            ps = conn.prepareStatement("select id, name, author, publish, price from shows where id =?");
            ps.setInt(1,id);
            rs = ps.executeQuery();
            if (rs.next()){
                return new Show(rs.getInt(1),rs.getString(2),rs.getString(3),rs.getString(4),rs.getDouble(5));
            }
        } catch (SQLException e) {
            e.printStackTrace();
        }finally {
            DBtools.close(conn,rs,ps);
        }
        return null;
    }

    @Override
    public List<Show> select() {
        List<Show> list = new ArrayList<>();
        conn = DBtools.getConn();
        try {
            ps = conn.prepareStatement("select id, name, author, publish, price from shows");
            rs = ps.executeQuery();
            while (rs.next()){
                list.add(new Show(rs.getInt(1),rs.getString(2),rs.getString(3),rs.getString(4),rs.getDouble(5)));
            }
            return list;
        } catch (SQLException e) {
            e.printStackTrace();
        }finally {
            DBtools.close(conn,rs,ps);
        }
        return null;
    }

    @Override
    public int insert(Show s) {
        conn = DBtools.getConn();
        try {
            ps = conn.prepareStatement("insert into shows values(null, ?, ?, ?, ?)");
            ps.setString(1,s.getName());
            ps.setString(2,s.getAuthor());
            ps.setString(3,s.getPublish());
            ps.setDouble(4,s.getPrice());
            return ps.executeUpdate();
        } catch (SQLException e) {
            e.printStackTrace();
        }finally {
            DBtools.close(conn,rs,ps);
        }
        return 0;
    }

    @Override
    public int delete(int id) {
        conn = DBtools.getConn();
        try {
            ps = conn.prepareStatement("delete from shows where id=?");
            ps.setInt(1,id);
            return ps.executeUpdate();
        } catch (SQLException e) {
            e.printStackTrace();
        }finally {
            DBtools.close(conn,rs,ps);
        }
        return 0;
    }

    @Override
    public int update(Show s) {
        conn = DBtools.getConn();
        try {
            ps = conn.prepareStatement("UPDATE shows set name=?,author=?,publish=?,price=? where id=?");
            ps.setString(1,s.getName());
            ps.setString(2,s.getAuthor());
            ps.setString(3,s.getPublish());
            ps.setDouble(4,s.getPrice());
            ps.setInt(5,s.getId());
            return ps.executeUpdate();
        } catch (SQLException e) {
            e.printStackTrace();
        }finally {
            DBtools.close(conn,rs,ps);
        }
        return 0;
    }
}

11,创建validate校验数据

package com.star.validate;

import com.star.bean.Show;
import org.springframework.validation.Errors;
import org.springframework.validation.ValidationUtils;
import org.springframework.validation.Validator;

/**
 * Created by Administrator on 2020/3/4.
 */
public class ShowValidate implements Validator {
    //判断当前类型是否为校验类型
    @Override
    public boolean supports(Class<?> clazz) {
        return Show.class.isAssignableFrom(clazz);
    }

    @Override
    public void validate(Object target, Errors errors) {
        Show s = (Show) target;

        ValidationUtils.rejectIfEmpty(errors, "id", "show.id");
        ValidationUtils.rejectIfEmpty(errors, "name", "show.name");
        ValidationUtils.rejectIfEmpty(errors, "author", "show.author");
        ValidationUtils.rejectIfEmpty(errors, "publish", "show.publish");
        ValidationUtils.rejectIfEmpty(errors, "price", "show.price");

    }
}

12.创建国际化的文件

show.id=this is not null
show.name=this is not null
show.author=this is not null
show.publish=this is not null
show.price=this is not null

13,项目结构

在这里插入图片描述

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本文链接:https://blog.csdn.net/weixin_44047709/article/details/104737593