idea配置springmvc+Mybatis

idea的話，貌似需要ultimate版本

我使用的是 2019.1

目錄

創建項目

修改pom.xml

創建結構

添加spring mvc框架

添加controller

添加頁面

配置tomcat

添加攔截器

添加Mybits

建表語句

entity

數據庫配置文件

修改 dispatcher-servlet.xml

mapper

dao

service 

controller

數據庫與頁面

---

 

創建項目

GroupId貌似可以隨便

ArtifactId就寫項目名 

 

勾選兩個Override 

 如果要換源的話

<?xml version="1.0" encoding="UTF-8"?>
<settings xmlns="http://maven.apache.org/SETTINGS/1.0.0"
          xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
          xsi:schemaLocation="http://maven.apache.org/SETTINGS/1.0.0 http://maven.apache.org/xsd/settings-1.0.0.xsd">
    <mirrors>
        <!-- 阿里雲倉庫 -->
        <mirror>
            <id>alimaven</id>
            <mirrorOf>central</mirrorOf>
            <name>aliyun maven</name>
            <url>http://maven.aliyun.com/nexus/content/repositories/central/</url>
        </mirror>
    
        <!-- 中央倉庫1 -->
        <mirror>
            <id>repo1</id>
            <mirrorOf>central</mirrorOf>
            <name>Human Readable Name for this Mirror.</name>
            <url>http://repo1.maven.org/maven2/</url>
        </mirror>
    
        <!-- 中央倉庫2 -->
        <mirror>
            <id>repo2</id>
            <mirrorOf>central</mirrorOf>
            <name>Human Readable Name for this Mirror.</name>
            <url>http://repo2.maven.org/maven2/</url>
        </mirror>
    </mirrors> 
</settings>

進來會彈出這個，選Enable Auto-Import 

加載完大概是這樣的

修改pom.xml

properties添加成這樣

<properties>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    <maven.compiler.source>1.7</maven.compiler.source>
    <maven.compiler.target>1.7</maven.compiler.target>
    <!-- spring版本號 -->
    <spring.version>4.2.6.RELEASE</spring.version>
    <!-- mybatis版本號 -->
    <mybatis.version>3.2.6</mybatis.version>
    <!-- log4j日誌文件管理包版本 -->
    <slf4j.version>1.7.7</slf4j.version>
    <log4j.version>1.2.17</log4j.version>
    <!-- jackson包版本 -->
    <jackson.version>2.5.0</jackson.version>
</properties>

dependencies添加成這樣 

<dependencies>
    <dependency>
      <groupId>junit</groupId>
      <artifactId>junit</artifactId>
      <version>4.11</version>
      <scope>test</scope>
    </dependency>
    <dependency>
      <groupId>junit</groupId>
      <artifactId>junit</artifactId>
      <version>3.8.1</version>
      <scope>test</scope>
    </dependency>
    <!--spring單元測試依賴 -->
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-test</artifactId>
      <version>${spring.version}</version>
      <scope>test</scope>
    </dependency>

    <!-- springMVC核心包 -->
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-webmvc</artifactId>
      <version>${spring.version}</version>
    </dependency>

    <!-- spring核心包 -->
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-core</artifactId>
      <version>${spring.version}</version>
    </dependency>

    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-beans</artifactId>
      <version>${spring.version}</version>
    </dependency>

    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-context</artifactId>
      <version>${spring.version}</version>
    </dependency>

    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-context-support</artifactId>
      <version>${spring.version}</version>
    </dependency>

    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-aop</artifactId>
      <version>${spring.version}</version>
    </dependency>

    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-aspects</artifactId>
      <version>4.0.9.RELEASE</version>
    </dependency>

    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-tx</artifactId>
      <version>${spring.version}</version>
    </dependency>

    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-web</artifactId>
      <version>${spring.version}</version>
    </dependency>

    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-jdbc</artifactId>
      <version>${spring.version}</version>
    </dependency>

    <!-- AOP begin -->
    <dependency>
      <groupId>org.aspectj</groupId>
      <artifactId>aspectjrt</artifactId>
      <version>1.7.4</version>
    </dependency>
    <dependency>
      <groupId>org.aspectj</groupId>
      <artifactId>aspectjweaver</artifactId>
      <version>1.7.4</version>
    </dependency>
    <dependency>
      <groupId>cglib</groupId>
      <artifactId>cglib</artifactId>
      <version>3.1</version>
    </dependency>
    <!-- AOP end -->

    <!-- mybatis核心包 -->
    <dependency>
      <groupId>org.mybatis</groupId>
      <artifactId>mybatis</artifactId>
      <version>${mybatis.version}</version>
    </dependency>

    <!--mybatis spring 插件 -->
    <dependency>
      <groupId>org.mybatis</groupId>
      <artifactId>mybatis-spring</artifactId>
      <version>1.2.2</version>
    </dependency>

    <!-- Mysql數據庫驅動包 -->
    <dependency>
      <groupId>mysql</groupId>
      <artifactId>mysql-connector-java</artifactId>
      <version>8.0.11</version>
    </dependency>

    <!--servlet-->
    <dependency>
      <groupId>javax.servlet</groupId>
      <artifactId>javax.servlet-api</artifactId>
      <version>3.0.1</version>
      <scope>provided</scope>
    </dependency>
    <dependency>
      <groupId>javax.servlet.jsp</groupId>
      <artifactId>jsp-api</artifactId>
      <version>2.2</version>
      <scope>provided</scope>
    </dependency>
    <dependency>
      <groupId>javax.servlet</groupId>
      <artifactId>jstl</artifactId>
      <version>1.2</version>
    </dependency>
    <dependency>
      <groupId>javax.annotation</groupId>
      <artifactId>jsr250-api</artifactId>
      <version>1.0</version>
    </dependency>
  </dependencies>

等加載完

創建結構

去掉Compact Middle Packages的勾

在src/main下創建main和resources目錄

webapp下建static目錄

    static下建css，fonts，images，js

WEB-INF下建立views

右鍵java->Mark Directory as->Source Root

同理，將resources變爲Resources Root 

在java下創建名爲com的package

     在com下創建名爲example的package

           在example下創建controller，dao，entity，service

添加spring mvc框架

ctrl+alt+shift+s

打開Project Structure

點Modules，選中Spring，點-

apply，然後ok 

 

右鍵項目，選Add Framework Support...

選Spring，Spring MVC 

勾選Create empty spring-config.xml

會多兩個文件 

 修改web.xml

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd"
         version="3.1">
    <context-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>/WEB-INF/applicationContext.xml</param-value>
    </context-param>
    <listener>
        <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
    </listener>
    <servlet>
        <servlet-name>dispatcher</servlet-name>
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
        <load-on-startup>1</load-on-startup>
    </servlet>
    <servlet-mapping>
        <servlet-name>default</servlet-name>
        <url-pattern>/static/*</url-pattern>
    </servlet-mapping>
<!--    <servlet-mapping>-->
<!--        <servlet-name>default</servlet-name>-->
<!--        <url-pattern>*.css</url-pattern>-->
<!--        <url-pattern>/static/css/*</url-pattern>-->
<!--    </servlet-mapping>-->
<!--    <servlet-mapping>-->
<!--        <servlet-name>default</servlet-name>-->
<!--        <url-pattern>*.jpg</url-pattern>-->
<!--        <url-pattern>*.png</url-pattern>-->
<!--        <url-pattern>*.jpeg</url-pattern>-->
<!--        <url-pattern>/static/images/*</url-pattern>-->
<!--    </servlet-mapping>-->
<!--    <servlet-mapping>-->
<!--        <servlet-name>default</servlet-name>-->
<!--        <url-pattern>*.js</url-pattern>-->
<!--        <url-pattern>/static/js/*</url-pattern>-->
<!--    </servlet-mapping>-->
<!--    <servlet-mapping>-->
<!--        <servlet-name>default</servlet-name>-->
<!--        <url-pattern>*.otf</url-pattern>-->
<!--        <url-pattern>*.eot</url-pattern>-->
<!--        <url-pattern>*.tff</url-pattern>-->
<!--        <url-pattern>*.woff</url-pattern>-->
<!--        <url-pattern>*.woff2</url-pattern>-->
<!--        <url-pattern>/static/fonts/*</url-pattern>-->
<!--    </servlet-mapping>-->
    <servlet-mapping>
        <servlet-name>dispatcher</servlet-name>
        <url-pattern>/</url-pattern>
    </servlet-mapping>
    <!--配置編碼過濾器-->
    <filter>
        <filter-name>CharacterEncodingFilter</filter-name>
        <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
        <init-param>
            <param-name>encoding</param-name>
            <param-value>utf-8</param-value>
        </init-param>
    </filter>
    <filter-mapping>
        <filter-name>CharacterEncodingFilter</filter-name>
        <url-pattern>/*</url-pattern>
        <!--攔截所有請求-->
    </filter-mapping>
</web-app>

修改dispatcher-servlet.xml

<context:component-scan base-package="com.example.dao,com.example.service,com.example.controller" />的com.example都要換成自己的包

  <property name="prefix" value="/WEB-INF/views/"/>的views換成自己的目錄

<?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.xsd">
    <description>Spring Configuration</description>
    <!-- 靜態資源(js、image等)的訪問 -->
    <mvc:default-servlet-handler/>
    <!-- 配置註解驅動 可以將request參數與綁定到controller參數上 -->
    <mvc:annotation-driven />
    <!-- 開啓組件自動掃描；使用Annotation自動註冊Bean，解決事物失效問題：在主容器中不掃描@Controller註解，在SpringMvc中只掃描@Controller註解。
         base-package 如果多個，用“,”分隔
         下面這裏要改 -->
    <context:component-scan base-package="com.example.dao,com.example.service,com.example.controller" />
    <!-- 靜態資源訪問 -->
    <mvc:resources location="/static/images/" mapping="/static/images/**"/>
    <mvc:resources location="/static/css/" mapping="/static/css/**"/>
    <mvc:resources location="/static/js/" mapping="/static/js/**"/>
    <mvc:resources location="/static/fonts/" mapping="/static/fonts/**"/>
    <!-- 對模型視圖名稱的解析，即在模型視圖名稱添加前後綴(如果最後一個還是表示文件夾,則最後的斜槓不要漏了) 使用JSP-->
    <!-- 默認的視圖解析器 在上邊的解析錯誤時使用 (默認使用html)- -->
    <bean id="defaultViewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name="viewClass" value="org.springframework.web.servlet.view.JstlView"/>
        <!--設置JSP文件的目錄位置
            下面這裏要改-->
        <property name="prefix" value="/WEB-INF/views/"/>
        <property name="suffix" value=".jsp"/>
    </bean>
</beans>

<mvc:annotation-driven />這一句說明啓用自動掃描Spring註解

<context:component-scan base-package="com.example.dao,com.example.service,com.example.controller" />這句說明掃描的位置。defaultViewResolver這個bean主要是用來方便controller返回尋找jsp視圖，定義了jsp目錄位置是/WEB-INF/views/下面。

添加controller

 在com.example.controller下創建IndexController.java

package com.example.controller;

import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.ModelAttribute;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;

import javax.annotation.Resource;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.PrintWriter;

@Controller
@RequestMapping("/")
public class IndexController {

    @RequestMapping(value = "/", method = RequestMethod.GET)
    public String login_Get(){
        return "login";
    }
    @RequestMapping(value = "/login", method = RequestMethod.GET)
    public String login_Get_2(){
        return "login";
    }

    @RequestMapping(value = "/welcome",method = RequestMethod.GET)
    public String welcome(){
        return "welcome";
    }

    @RequestMapping(value = "/login", method = RequestMethod.POST)
    public String login(@ModelAttribute("username") String username, @ModelAttribute("password") String password){
        if("Nightmare4214".equals(username) && "p@ssw0rd".equals(password)){
            return "welcome";
        }
        return "login";
    }
}

添加頁面

先刪除index.jsp

在WEB-INF/views下創建login.jsp

<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html lang="zh-CN">
<body>
<form method="post" action="login">
    登錄名：<label>
    <input name='username' type="text" value="Nightmare4214"/>
</label><br/>
    密碼：<label>
    <input name ='password' type="password" value="p@ssw0rd"/>
</label><br/>
    <button type="submit" style="width: 70px; height: 20px;">確定</button>
</form>
</body>
</html>

在WEB-INF/view下創建welcome.jsp

<html>
<body>
<h2>Hello Nightmare4214</h2>
<img src="static/images/1.png">
</body>
</html>

配置tomcat

點右上角的Add Configuration->點+   ->Tomcat Server ->local

點configure，如果以前沒配置過 

 Tomcat Home和Tomcat base directory換成你tomcat解壓的地方

點Deployment->點+  ->springMVC:war exploded->ok 

把 Application Context換成項目名

 

 最後點Apply->ok

 

向images添加一張圖片1.png

啓動

 

輸入Nightmare4214 和p@ssw0rd 來進入index

添加攔截器

在com.example下創建interceptor包

   在interceptor下創建LoginInterceptor.java

package com.example.interceptor;

import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.ModelAndView;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;

public class LoginInterceptor implements HandlerInterceptor {

    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object o) throws Exception {
        String uri = request.getRequestURI();
        //System.out.println(uri); //得到的urlleisi/mini/,/mini/login
        //UTL:除了login.jsp是可以公開訪問的，其他的URL都進行攔截控制
        if (uri.endsWith("/")||uri.endsWith("/login")) {
            return true;
        }
        //獲取session
        HttpSession session = request.getSession();
        String user = (String) session.getAttribute("USER_SESSION");
        //判斷session中是否有用戶數據，如果有，則返回true，繼續向下執行
        if (user != null) {
            return true;
        }
        //不符合條件的給出提示信息，並轉發到登錄頁面
        request.setAttribute("msg", "您還沒有登錄，請先登錄！");
        request.getRequestDispatcher("/WEB-INF/views/login.jsp").forward(request, response);
        return false;
    }

    @Override
    public void postHandle(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, Object o, ModelAndView modelAndView) throws Exception {

    }

    @Override
    public void afterCompletion(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, Object o, Exception e) throws Exception {

    }
}

修改dispatcher-servlet.xml

<bean class="com.example.interceptor.LoginInterceptor"/>的com.example.interceptor.LoginInterceptor要改成自己的java文件

 

<context:component-scan base-package="com.example.dao,com.example.service,com.example.controller" />的com.example都要換成自己的包

  <property name="prefix" value="/WEB-INF/views/"/>的views換成自己的目錄

 

<?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.xsd">
    <description>Spring Configuration</description>
    <!-- 靜態資源(js、image等)的訪問 -->
    <mvc:default-servlet-handler/>
    <!-- 配置註解驅動 可以將request參數與綁定到controller參數上 -->
    <mvc:annotation-driven />
    <!-- 開啓組件自動掃描；使用Annotation自動註冊Bean，解決事物失效問題：在主容器中不掃描@Controller註解，在SpringMvc中只掃描@Controller註解。
         base-package 如果多個，用“,”分隔
         下面這裏要改 -->
    <context:component-scan base-package="com.example.dao,com.example.service,com.example.controller" />
    <!-- 靜態資源訪問 -->
    <mvc:resources location="/static/images/" mapping="/static/images/**"/>
    <mvc:resources location="/static/css/" mapping="/static/css/**"/>
    <mvc:resources location="/static/js/" mapping="/static/js/**"/>
    <mvc:resources location="/static/fonts/" mapping="/static/fonts/**"/>
    <!-- 對模型視圖名稱的解析，即在模型視圖名稱添加前後綴(如果最後一個還是表示文件夾,則最後的斜槓不要漏了) 使用JSP-->
    <!-- 默認的視圖解析器 在上邊的解析錯誤時使用 (默認使用html)- -->
    <bean id="defaultViewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name="viewClass" value="org.springframework.web.servlet.view.JstlView"/>
        <!--設置JSP文件的目錄位置
            下面這裏要改-->
        <property name="prefix" value="/WEB-INF/views/"/>
        <property name="suffix" value=".jsp"/>
    </bean>
    <!--配置攔截器-->
    <mvc:interceptors>
        <!--  <bean class="cn.lzc.interceptor.CustomInterceptor"></bean>--><!--攔截所有請求-->

        <!-- <mvc:interceptor>
            <mvc:mapping path="/**"/>
            <mvc:exclude-mapping path="/" /><&lt;!&ndash;配置了mapping 這個 將不再起作用&ndash;&gt;
            <bean class="cn.lzc.interceptor.CustomInterceptor"></bean>
        </mvc:interceptor>-->

        <!--<mvc:interceptor>-->
        <!--<mvc:mapping path="/hello" />&lt;!&ndash;配置攔截hello結尾的&ndash;&gt;-->
        <!--<bean class="cn.lzc.interceptor.CustomInterceptor"/>-->
        <!--</mvc:interceptor>-->

        <!--登錄攔截器-->
        <mvc:interceptor>
            <mvc:mapping path="/**"/>
            <!-- 下面這裏要改 -->
            <bean class="com.example.interceptor.LoginInterceptor"/>
        </mvc:interceptor>
    </mvc:interceptors>
</beans>

 修改IndexController.java

添加了session

package com.example.controller;

import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.ModelAttribute;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;

import javax.annotation.Resource;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.PrintWriter;

@Controller
@RequestMapping("/")
public class IndexController {

    @RequestMapping(value = "/", method = RequestMethod.GET)
    public String login_Get(){
        return "login";
    }
    @RequestMapping(value = "/login", method = RequestMethod.GET)
    public String login_Get_2(){
        return "login";
    }

    @RequestMapping(value = "/welcome",method = RequestMethod.GET)
    public String welcome(){
        return "welcome";
    }

    @RequestMapping(value = "/login", method = RequestMethod.POST)
    public String login(@ModelAttribute("username") String username, @ModelAttribute("password") String password,
                        HttpServletRequest request, HttpServletResponse response){
        if("Nightmare4214".equals(username) && "p@ssw0rd".equals(password)){
            request.getSession().setAttribute("USER_SESSION",username);
            return "welcome";
        }
        return "login";
    }
}

運行，效果和之前一樣 

添加Mybits

 

建表語句

create database springtest;
use springtest;

create table users(
id int PRIMARY KEY AUTO_INCREMENT,
username varchar(20),
password varchar(50)
) auto_increment = 1;

insert into users(username,password) values('Nightmare4214','p@ssw0rd');

entity

在 com.example.entity下創建 Users.java

package com.example.entity;

import org.springframework.stereotype.Repository;


public class Users {

    private Integer id;
    private String username;
    private String password;

    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 String getPassword() { return password; }

    public void setPassword(String password) { this.password = password;}

}

數據庫配置文件

在resources下創建jdbc.properties

jdbc_driverClassName=com.mysql.jdbc.Driver
jdbc_url=jdbc:mysql://localhost:3306/springtest
jdbc_username=root
jdbc_password=888888

修改 dispatcher-servlet.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: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.xsd">
    <description>Spring Configuration</description>
    <!-- 靜態資源(js、image等)的訪問 -->
    <mvc:default-servlet-handler/>
    <!-- 配置註解驅動 可以將request參數與綁定到controller參數上 -->
    <mvc:annotation-driven />
    <!-- 開啓組件自動掃描；使用Annotation自動註冊Bean，解決事物失效問題：在主容器中不掃描@Controller註解，在SpringMvc中只掃描@Controller註解。
         base-package 如果多個，用“,”分隔
         下面這裏要改 -->
    <context:component-scan base-package="com.example.dao,com.example.service,com.example.controller" />
    <!-- 靜態資源訪問 -->
    <mvc:resources location="/static/images/" mapping="/static/images/**"/>
    <mvc:resources location="/static/css/" mapping="/static/css/**"/>
    <mvc:resources location="/static/js/" mapping="/static/js/**"/>
    <mvc:resources location="/static/fonts/" mapping="/static/fonts/**"/>
    <!-- 對模型視圖名稱的解析，即在模型視圖名稱添加前後綴(如果最後一個還是表示文件夾,則最後的斜槓不要漏了) 使用JSP-->
    <!-- 默認的視圖解析器 在上邊的解析錯誤時使用 (默認使用html)- -->
    <bean id="defaultViewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name="viewClass" value="org.springframework.web.servlet.view.JstlView"/>
        <!--設置JSP文件的目錄位置
            下面這裏要改-->
        <property name="prefix" value="/WEB-INF/views/"/>
        <property name="suffix" value=".jsp"/>
    </bean>

    <!-- 配置數據源 -->
    <bean id="propertyConfigurer" class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
        <property name="locations">
            <list>
                <value>classpath:jdbc.properties</value>
                <!--要是有多個配置文件，只需在這裏繼續添加即可 -->
            </list>
        </property>
    </bean>
    <bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
        <property name="driverClassName">
            <value>${jdbc_driverClassName}</value>
        </property>
        <property name="url">
            <value>${jdbc_url}</value>
        </property>
        <property name="username">
            <value>${jdbc_username}</value>
        </property>
        <property name="password">
            <value>${jdbc_password}</value>
        </property>
    </bean>
    <!-- 配置Mybatis的文件 ，mapperLocations配置**Mapper.xml文件位置，configLocation配置mybatis-config文件位置-->
    <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
        <property name="dataSource" ref="dataSource" />
        <property name="mapperLocations" value="classpath:mapper/*.xml"/>
    </bean>
    <!--配置攔截器-->
    <mvc:interceptors>
        <!--  <bean class="cn.lzc.interceptor.CustomInterceptor"></bean>--><!--攔截所有請求-->

        <!-- <mvc:interceptor>
            <mvc:mapping path="/**"/>
            <mvc:exclude-mapping path="/" /><&lt;!&ndash;配置了mapping 這個 將不再起作用&ndash;&gt;
            <bean class="cn.lzc.interceptor.CustomInterceptor"></bean>
        </mvc:interceptor>-->

        <!--<mvc:interceptor>-->
        <!--<mvc:mapping path="/hello" />&lt;!&ndash;配置攔截hello結尾的&ndash;&gt;-->
        <!--<bean class="cn.lzc.interceptor.CustomInterceptor"/>-->
        <!--</mvc:interceptor>-->

        <!--登錄攔截器-->
        <mvc:interceptor>
            <mvc:mapping path="/**"/>
            <!-- 下面這裏要改 -->
            <bean class="com.example.interceptor.LoginInterceptor"/>
        </mvc:interceptor>
    </mvc:interceptors>
</beans>

mapper

在resources下創建mapper目錄

mapper下創建UsersMapper.xml

 其中<mapper namespace="com.example.mapper.UsersMapper">中的com.example 一定要換成自己的包

<resultMap id="BaseUsers" type="com.example .entity.Users">中的com.example 一定要換成自己的包

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<!-- 下面這裏要改 -->
<mapper namespace="com.example.mapper.UsersMapper">
    <!--設置domain類和數據庫中表的字段一一對應，注意數據庫字段和domain類中的字段名稱不致，此處一定要！
        下面這裏要改-->
    <resultMap id="BaseUsers" type="com.example.entity.Users">
        <id column="id" property="id" jdbcType="INTEGER" />
        <result column="username" property="username" jdbcType="VARCHAR" />
        <result column="password" property="password" jdbcType="VARCHAR" />
    </resultMap>
    <!-- 查詢所有記錄 -->
    <select id="selectAllUsers" resultMap="BaseUsers">
        SELECT * FROM users
    </select>
    <!-- 查詢單個記錄 -->
    <select id="selectUsersByUsername" parameterType="java.lang.String"  resultMap="BaseUsers">
        SELECT * FROM users WHERE username=#{username}
    </select>
</mapper>

dao

在com.example.dao下創建 UsersDao.java

package com.example.dao;

import com.example.entity.Users;

public interface UsersDao {
    Users getUsersByUsername(String username);
}

 在com.example.dao下創建名爲impl的package

在com.example.dao.impl下創建UsersDaoImpl.java

其中com.example.mapper.UsersMapper.selectUsersByUsername

中的com.example一定要換成自己包名

package com.example.dao.impl;

import com.example.dao.UsersDao;
import com.example.entity.Users;
import org.apache.ibatis.session.SqlSessionFactory;
import org.mybatis.spring.support.SqlSessionDaoSupport;
import org.springframework.stereotype.Repository;

import javax.annotation.Resource;

@Repository
public class UsersDaoImpl extends SqlSessionDaoSupport implements UsersDao {
    @Resource
    public void setSqlSessionFactory(SqlSessionFactory sqlSessionFactory) {
        super.setSqlSessionFactory(sqlSessionFactory);
    }
    @Override
    public Users getUsersByUsername(String username){
        //下面這裏要修改
        return this.getSqlSession().selectOne("com.example.mapper.UsersMapper.selectUsersByUsername", username);
    }
}

service 

在com.example.service下創建UsersService.java

package com.example.service;

import com.example.entity.Users;

public interface UsersService {
    Users getUsersByUsername(String username);
}

在com.example.service下創建名爲impl的package

在com.example.service.impl下創建UsersServiceImpl.java

package com.example.service.impl;

import com.example.dao.UsersDao;
import com.example.entity.Users;
import com.example.service.UsersService;
import org.springframework.stereotype.Service;

import javax.annotation.Resource;

@Service
public class UsersServiceImpl implements UsersService {
    @Resource
    private UsersDao usersDao;
    @Override
    public Users getUsersByUsername(String username){
        return usersDao.getUsersByUsername(username);
    }
}

controller

修改com.example.controller下的IndexController.java

package com.example.controller;

import com.example.entity.Users;
import com.example.service.UsersService;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.ModelAttribute;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;

import javax.annotation.Resource;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.PrintWriter;

@Controller
@RequestMapping("/")
public class IndexController {
    @Resource
    private UsersService usersService;

    @RequestMapping(value = "/", method = RequestMethod.GET)
    public String login_Get(){
        return "login";
    }
    @RequestMapping(value = "/login", method = RequestMethod.GET)
    public String login_Get_2(){
        return "login";
    }

    @RequestMapping(value = "/welcome",method = RequestMethod.GET)
    public String welcome(){
        return "welcome";
    }

    @RequestMapping(value = "/login", method = RequestMethod.POST)
    public String login(@ModelAttribute("username") String username, @ModelAttribute("password") String password,
                        HttpServletRequest request, HttpServletResponse response){
        String msg;
        if("".equals(username)||"".equals(password)){
            msg="賬號或者密碼不能爲空";
        }
        else{
            Users user = usersService.getUsersByUsername(username);
            if(user != null && user.getPassword().equals(password)){
                //將用戶對象添加到Session中
                request.getSession().setAttribute("USER_SESSION",username);
                return "welcome";
            }
            msg="賬號或者密碼錯誤";
        }
        try {
            response.setContentType("text/html;charset=utf-8");
            PrintWriter out = response.getWriter();
            //彈窗
            out.printf("<script>alert('%s');history.back();</script>",msg);
            //這句很關鍵
            out.flush();
            out.close();
        }catch (IOException e) {
            e.printStackTrace();
        }
        return "login";
    }
}

啓動

 

賬號密碼爲空的時候

賬號密碼錯誤的時候

數據庫與頁面

修改welcome函數

package com.example.controller;

import com.example.entity.Users;
import com.example.service.UsersService;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.ModelAttribute;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;

import javax.annotation.Resource;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.PrintWriter;

@Controller
@RequestMapping("/")
public class IndexController {
    @Resource
    private UsersService usersService;

    @RequestMapping(value = "/", method = RequestMethod.GET)
    public String login_Get(){
        return "login";
    }
    @RequestMapping(value = "/login", method = RequestMethod.GET)
    public String login_Get_2(){
        return "login";
    }

    @RequestMapping(value = "/welcome",method = RequestMethod.POST)
    public ModelAndView welcome(HttpServletRequest request, HttpServletResponse response）{
        System.out.println("in");
        //調用Service層進行數據查找
        List<GoodsSeries> result=goodsSeriesService.getAllSeries();

        ModelAndView modelAndView = new ModelAndView();

        //將數據放到request中
        modelAndView.addObject("goods_series", result);

        //指定視圖
        modelAndView.setViewName("welcome");

        return modelAndView;
    }

    @RequestMapping(value = "/login", method = RequestMethod.POST)
    public String login(@ModelAttribute("username") String username, @ModelAttribute("password") String password,
                        HttpServletRequest request, HttpServletResponse response){
        String msg;
        if("".equals(username)||"".equals(password)){
            msg="賬號或者密碼不能爲空";
        }
        else{
            Users user = usersService.getUsersByUsername(username);
            if(user != null && user.getPassword().equals(password)){
                //將用戶對象添加到Session中
                request.getSession().setAttribute("USER_SESSION",username);
                return "welcome";
            }
            msg="賬號或者密碼錯誤";
        }
        try {
            response.setContentType("text/html;charset=utf-8");
            PrintWriter out = response.getWriter();
            //彈窗
            out.printf("<script>alert('%s');history.back();</script>",msg);
            //這句很關鍵
            out.flush();
            out.close();
        }catch (IOException e) {
            e.printStackTrace();
        }
        return "login";
    }
}

現在數據在goods_series中了

welcome.jsp 

<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<html lang="zh-cn">
<head>
    <meta charset="UTF-8">
    <title>後臺登錄</title>
</head>
<body>
<h2>你好 ${USER_SESSION}</h2>
<img src="static/images/1.png">
<select id="goods_series" name="goods_series">
    <option value="全部">全部</option>
    <c:forEach var="series" items="${goods_series}">
        <option value="${series.goods_series_id}">${series.goods_series_name}</option>
    </c:forEach>
</select>
</body>
</html>

啓動

 

 

參考資料

https://www.cnblogs.com/Jeffscnblog/p/8446380.html

https://www.cnblogs.com/shang-shang/p/7477607.html

https://my.oschina.net/gaussik/blog/385697