SpringBoot圖文并茂講解登錄攔截器

更新時間：2022年06月27日 09:08:43 作者：鳴鼓ming

其實(shí)spring boot攔截器的配置方式和springMVC差不多,只有一些小的改變需要注意下就ok了,下面這篇文章主要給大家介紹了關(guān)于如何在Springboot實(shí)現(xiàn)登陸攔截器功能的相關(guān)資料,需要的朋友可以參考下

1.相關(guān)概念

1.實(shí)現(xiàn)效果

當(dāng)沒有輸入正確的賬號密碼登錄成功時, 除了登錄頁,其他頁面都無法訪問(靜態(tài)資源要放行)

2.實(shí)現(xiàn)步驟

編寫一個攔截器實(shí)現(xiàn)HandlerInterceptor接口
攔截器注冊到容器中（實(shí)現(xiàn)WebMvcConfigurer的addInterceptors()）
指定攔截規(guī)則（注意，如果是攔截所有，靜態(tài)資源也會被攔截)

2.代碼實(shí)現(xiàn)

1.配置文件

pom.xml

<?xml version="1.0" encoding="UTF-8"?>
<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 https://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.7.0</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>com.limi</groupId>
    <artifactId>springboot-test2</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>springboot-test2</name>
    <description>Demo project for Spring Boot</description>
    <properties>
        <java.version>1.8</java.version>
    </properties>
    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-devtools</artifactId>
            <scope>runtime</scope>
            <optional>true</optional>
        </dependency>
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <optional>true</optional>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-configuration-processor</artifactId>
            <optional>true</optional>
        </dependency>
    </dependencies>
    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
                <configuration>
                    <excludes>
                        <exclude>
                            <groupId>org.projectlombok</groupId>
                            <artifactId>lombok</artifactId>
                        </exclude>
                    </excludes>
                </configuration>
            </plugin>
            <!-- 下面插件作用是工程打包時，不將spring-boot-configuration-processor打進(jìn)包內(nèi)，讓其只在編碼的時候有用 -->
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
                <configuration>
                    <excludes>
                        <exclude>
                            <groupId>org.springframework.boot</groupId>
                            <artifactId>spring-boot-configuration-processor</artifactId>
                        </exclude>
                    </excludes>
                </configuration>
            </plugin>
        </plugins>
    </build>
</project>

application.properties

server.port=8080

2.java代碼

SpringbootTest2Application

package com.limi.springboottest2;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.context.ConfigurableApplicationContext;
@SpringBootApplication
public class SpringbootTest2Application {
    public static void main(String[] args) {
        //1、返回我們IOC容器
        ConfigurableApplicationContext run = SpringApplication.run(SpringbootTest2Application.class, args);
    }
}

LoginInterceptor

package com.limi.springboottest2.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 handler) throws Exception {
        System.out.println("=========LoginInterceptor preHandle==========");
        HttpSession session = request.getSession();
        if(session.getAttribute("username")==null) //未登錄
        {
            //未登錄， 重定向到登錄頁
            response.sendRedirect("/index");  //重定向到登錄controller
            return false;//攔截
        }
        return true;
    }
    @Override
    public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) throws Exception {
        System.out.println("==========LoginInterceptor postHandle==========");
    }
    @Override
    public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {
        System.out.println("==========LoginInterceptor afterCompletion==========");
    }
}

WebConfig

package com.limi.springboottest2.config;
import com.limi.springboottest2.interceptor.LoginInterceptor;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.servlet.config.annotation.InterceptorRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;
@Configuration
public class WebConfig implements WebMvcConfigurer {
    @Override
    public void addInterceptors(InterceptorRegistry registry) {
        registry.addInterceptor(new LoginInterceptor())//攔截器注冊到容器中
                .addPathPatterns("/**")  //所有請求都被攔截包括靜態(tài)資源
                .excludePathPatterns("/index", "/login") //放行的網(wǎng)絡(luò)請求,
                .excludePathPatterns("/view/index.html","/css/**","/images/**", "/js/**"); //放行的資源請求
    }
}

HelloController

package com.limi.springboottest2.controller;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.*;
import org.springframework.web.servlet.ModelAndView;
import javax.servlet.http.HttpSession;
@Controller
public class HelloController {
    @GetMapping("/index")
    public String index(){
        return "/view/index.html";  //沒有使用模板引擎, 所以要帶上后綴
    }
    @PostMapping("/login")
    public String login(HttpSession session, String username, String password){
        System.out.println("username:"+username+"   password:"+password);
        if("andy".equals(username)&&"123456".equals(password)) { //賬號密碼匹配成功
            session.setAttribute("username", username);
            return "redirect:/success";
        }
        return "redirect:/index";
    }
    @GetMapping("/success")
    public ModelAndView test1(HttpSession session){
        System.out.println("======執(zhí)行控制器中方法success======");
        String name = (String)session.getAttribute("username");
        ModelAndView mv = new ModelAndView();
        mv.addObject("name", name);
        mv.setViewName("/view/success.html");
        return mv;
    }
}

3.前端代碼

index.css

h1{
color: blueviolet;
}

index.html

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <link rel="stylesheet" href="./css/index.css" rel="external nofollow" >
</head>
<body>
    <h1>請輸入賬號密碼進(jìn)行登錄!</h1>
    <form action="login" method="post">
        賬號<input type="text" name="username"><br>
        密碼<input type="password" name="password"><br>
        <input type="submit" value="提交"><br>
    </form>
</body>
</html>

success.html

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <h1>登錄成功!</h1>
</head>
<body>
</body>
</html>

3.運(yùn)行測試

1.直接通過網(wǎng)址訪問登錄成功頁面

被重定向到登錄頁

2.輸入錯誤賬號密碼

被重定向到登錄頁

3.輸入正確賬號密碼

到此這篇關(guān)于SpringBoot圖文并茂講解登錄攔截器的文章就介紹到這了,更多相關(guān)SpringBoot登錄攔截器內(nèi)容請搜索腳本之家以前的文章或繼續(xù)瀏覽下面的相關(guān)文章希望大家以后多多支持腳本之家！

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SpringBoot圖文并茂講解登錄攔截器

目錄

1.相關(guān)概念

1.實(shí)現(xiàn)效果

2.實(shí)現(xiàn)步驟

2.代碼實(shí)現(xiàn)

1.配置文件

2.java代碼

3.前端代碼

3.運(yùn)行測試

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最新評論

大家感興趣的內(nèi)容

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国产无遮挡裸体免费直播视频,久久精品国产蜜臀av,动漫在线视频一区二区,欧亚日韩一区二区三区,久艹在线 免费视频,国产精品美女网站免费,正在播放 97超级视频在线观看,斗破苍穹年番在线观看免费,51最新乱码中文字幕

SpringBoot圖文并茂講解登錄攔截器

目錄

1.相關(guān)概念

1.實(shí)現(xiàn)效果

2.實(shí)現(xiàn)步驟

2.代碼實(shí)現(xiàn)

1.配置文件

2.java代碼

3.前端代碼

3.運(yùn)行測試

相關(guān)文章

最新評論

大家感興趣的內(nèi)容

最近更新的內(nèi)容

常用在線小工具

国产无遮挡裸体免费直播视频,久久精品国产蜜臀av,动漫在线视频一区二区,欧亚日韩一区二区三区,久艹在线免费视频,国产精品美女网站免费,正在播放 97超级视频在线观看,斗破苍穹年番在线观看免费,51最新乱码中文字幕