2024-09-02

在Spring Security中使用AJAX进行登录认证,你需要创建一个控制器来处理AJAX请求,并使用Spring Security的支持来完成认证过程。以下是一个简单的例子:

  1. 创建一个控制器来处理登录请求:



import org.springframework.security.authentication.AuthenticationManager;
import org.springframework.security.authentication.UsernamePasswordAuthenticationToken;
import org.springframework.security.core.Authentication;
import org.springframework.security.core.AuthenticationException;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RestController;
 
@RestController
public class LoginController {
 
    private final AuthenticationManager authenticationManager;
 
    public LoginController(AuthenticationManager authenticationManager) {
        this.authenticationManager = authenticationManager;
    }
 
    @PostMapping("/login")
    public Authentication login(@RequestBody Authentication authentication) {
        return authenticationManager.authenticate(new UsernamePasswordAuthenticationToken(
                authentication.getName(), authentication.getCredentials()));
    }
}
  1. 确保你的Spring Security配置使用了正确的HTTP安全配置:



import org.springframework.security.config.annotation.web.builders.HttpSecurity;
import org.springframework.security.config.annotation.web.configuration.WebSecurityConfigurerAdapter;
 
public class SecurityConfig extends WebSecurityConfigurerAdapter {
 
    @Override
    protected void configure(HttpSecurity http) throws Exception {
        http
            .authorizeRequests()
                .anyRequest().authenticated()
                .and()
            .formLogin()
                .and()
            .csrf().disable(); // 禁用CSRF保护,为了简化示例
    }
}
  1. 前端AJAX请求示例:



$.ajax({
    url: '/login',
    type: 'POST',
    contentType: 'application/json',
    data: JSON.stringify({
        name: 'username',
        credentials: 'password'
    }),
    success: function(response) {
        // 登录成功处理
    },
    error: function(xhr, status, error) {
        // 登录失败处理
   
2024-09-02



import org.springframework.cloud.bootstrap.encrypt.EncryptionBootstrapConfiguration;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.Profile;
import org.springframework.security.config.annotation.web.builders.HttpSecurity;
import org.springframework.security.config.annotation.web.configuration.WebSecurityConfigurerAdapter;
 
@Configuration
@Profile("!itest") // 排除集成测试配置文件
public class SecurityConfig extends WebSecurityConfigurerAdapter {
 
    @Override
    protected void configure(HttpSecurity http) throws Exception {
        http
            .csrf().disable() // 禁用CSRF保护
            .authorizeRequests()
            .anyRequest().authenticated() // 所有请求需认证
            .and()
            .httpBasic(); // 基本认证
    }
}

这个代码示例展示了如何在SpringBoot/SpringCloud微服务框架中配置安全性,同时禁用了CSRF保护和启用了基本认证。在实际部署时,应当根据具体需求进一步配置安全策略,比如使用更为复杂的认证和授权机制。

2024-09-02



import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.Primary;
import org.springframework.data.mongodb.core.MongoTemplate;
import org.springframework.data.mongodb.repository.config.EnableMongoRepositories;
import com.mongodb.MongoClient;
import com.mongodb.MongoClientURI;
 
@Configuration
@EnableMongoRepositories(basePackages = "com.example.repository.first", mongoTemplateRef = "firstMongoTemplate")
public class FirstMongoConfig {
 
    @Bean(name = "firstMongoTemplate")
    @Primary
    public MongoTemplate firstMongoTemplate() throws Exception {
        MongoClient mongoClient = new MongoClient(new MongoClientURI("mongodb://user:pass@localhost:27017/firstDB"));
        return new MongoTemplate(mongoClient, "firstDB");
    }
}
 
@Configuration
@EnableMongoRepositories(basePackages = "com.example.repository.second", mongoTemplateRef = "secondMongoTemplate")
public class SecondMongoConfig {
 
    @Bean(name = "secondMongoTemplate")
    public MongoTemplate secondMongoTemplate() throws Exception {
        MongoClient mongoClient = new MongoClient(new MongoClientURI("mongodb://user:pass@localhost:27017/secondDB"));
        return new MongoTemplate(mongoClient, "secondDB");
    }
}

这个代码示例展示了如何在Spring Boot应用程序中配置多个MongoDB数据源。每个数据源都有自己的配置类,定义了MongoTemplate bean,并且指定了对应的包路径和数据库名。通过@EnableMongoRepositories注解,Spring Data MongoDB会为每个数据源创建对应的仓库实例。注意,为了避免潜在的冲突,主要的数据源需要用@Primary注解标记。

2024-09-02



import feign.RequestInterceptor;
import feign.RequestTemplate;
import feign.Response;
import feign.codec.Decoder;
import feign.codec.Encoder;
import org.springframework.cloud.openfeign.support.SpringDecoder;
import org.springframework.cloud.openfeign.support.SpringEncoder;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import feign.Feign;
 
@Configuration
public class FeignConfig {
 
    @Bean
    public Encoder feignEncoder() {
        return new SpringEncoder(feignHttpMessageConverter());
    }
 
    @Bean
    public Decoder feignDecoder() {
        return new SpringDecoder(feignHttpMessageConverter());
    }
 
    private ObjectFactory<HttpMessageConverters> feignHttpMessageConverter() {
        return new ObjectFactory<HttpMessageConverters>() {
            @Override
            public HttpMessageConverters getObject() {
                return new HttpMessageConverters(new AdditionalJackson2HttpMessageConverter());
            }
        };
    }
 
    @Bean
    public RequestInterceptor requestInterceptor() {
        return new RequestInterceptor() {
            @Override
            public void apply(RequestTemplate template) {
                template.header("Custom-Header", "value");
            }
        };
    }
 
    @Bean
    public Feign.Builder feignBuilder() {
        return Feign.builder()
                .encoder(feignEncoder())
                .decoder(feignDecoder())
                .requestInterceptor(requestInterceptor());
    }
}

这个配置类展示了如何自定义Feign的编码器、解码器和请求拦截器。在这个例子中,我们添加了一个自定义的请求头,并且使用了一个额外的消息转换器来处理特定的数据格式。这个配置可以用在需要对Feign客户端进行定制化配置的场景中。

2024-09-02

在这个系列的第四部分,我们将会创建一个简单的服务注册中心,并将其连接到Spring Cloud Config服务器。

  1. 首先,在microservice-discovery-eureka模块的pom.xml中添加Eureka Server依赖:



<dependencies>
    <!-- Eureka Server -->
    <dependency>
        <groupId>org.springframework.cloud</groupId>
        ><artifactId>spring-cloud-starter-netflix-eureka-server</artifactId>
    </dependency>
</dependencies>
  1. src/main/resources目录下创建application.yml配置文件,并添加以下内容:



server:
  port: 8761
 
eureka:
  instance:
    hostname: localhost
  client:
    registerWithEureka: false
    fetchRegistry: false
    serviceUrl:
      defaultZone: http://${eureka.instance.hostname}:${server.port}/eureka/
  1. src/main/java目录下创建一个名为EurekaServerApplication.java的Java类,并添加以下内容:



import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.netflix.eureka.server.EnableEurekaServer;
 
@SpringBootApplication
@EnableEurekaServer
public class EurekaServerApplication {
    public static void main(String[] args) {
        SpringApplication.run(EurekaServerApplication.class, args);
    }
}
  1. 运行应用程序,访问http://localhost:8761/,你应该能看到Eureka服务器的管理界面。
  2. microservice-provider-user模块中,更新application.yml配置文件,将服务注册到Eureka Server:



eureka:
  client:
    serviceUrl:
      defaultZone: http://localhost:8761/eureka/
  1. microservice-consumer-movie模块中,同样更新application.yml配置文件,将服务注册到Eureka Server:



eureka:
  client:
    serviceUrl:
      defaultZone: http://localhost:8761/eureka/
  1. 重启两个服务提供者和一个服务消费者应用程序,它们现在应该会在Eureka服务器的管理界面中注册自己。

以上步骤构建了一个简单的服务注册中心,并将两个微服务注册到这个中心。在下一部分,我们将会实现微服务的负载均衡和断路器模式。

2024-09-02

由于篇幅所限,以下仅提供集成阿里云OSS的示例代码。




import com.aliyun.oss.OSS;
import com.aliyun.oss.OSSClientBuilder;
import java.io.InputStream;
 
public class OssService {
 
    private OSS ossClient;
 
    public OssService(String endpoint, String accessKeyId, String accessKeySecret) {
        this.ossClient = new OSSClientBuilder().build(endpoint, accessKeyId, accessKeySecret);
    }
 
    public String uploadFile(InputStream inputStream, String bucketName, String objectName) {
        ossClient.putObject(bucketName, objectName, inputStream);
        return "https://" + bucketName + "." + ossClient.getEndpoint().getHost() + "/" + objectName;
    }
 
    public void shutdown() {
        if (ossClient != null) {
            ossClient.shutdown();
        }
    }
}

使用方法:




OssService ossService = new OssService("你的endpoint", "你的accessKeyId", "你的accessKeySecret");
InputStream inputStream = ...; // 获取文件输入流
String bucketName = "你的bucket名称";
String objectName = "你想设定的文件名";
String fileUrl = ossService.uploadFile(inputStream, bucketName, objectName);
// 使用fileUrl
ossService.shutdown();

注意:以上代码仅为示例,实际使用时需要替换endpointaccessKeyIdaccessKeySecretbucketNameobjectName为你自己的阿里云OSS配置信息。

2024-09-02

为了回答您的问题,我需要提供一个基于Spring Boot的高校实习管理系统的简化版本示例。以下是一个简化版本的代码示例,包括一个学生信息控制器和一个主要服务注解。




package com.example.internshipsystem;
 
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.context.annotation.ComponentScan;
 
@SpringBootApplication
@ComponentScan(basePackages = "com.example.internshipsystem")
public class InternshipSystemApplication {
 
    public static void main(String[] args) {
        SpringApplication.run(InternshipSystemApplication.class, args);
    }
}



package com.example.internshipsystem.controller;
 
import com.example.internshipsystem.entity.Student;
import com.example.internshipsystem.service.StudentService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.*;
 
import java.util.List;
 
@RestController
@RequestMapping("/students")
public class StudentController {
 
    private final StudentService studentService;
 
    @Autowired
    public StudentController(StudentService studentService) {
        this.studentService = studentService;
    }
 
    @GetMapping
    public List<Student> getAllStudents() {
        return studentService.findAllStudents();
    }
 
    @GetMapping("/{id}")
    public Student getStudentById(@PathVariable("id") Long id) {
        return studentService.findStudentById(id);
    }
 
    @PostMapping
    public Student createStudent(@RequestBody Student student) {
        return studentService.createStudent(student);
    }
 
    @PutMapping("/{id}")
    public Student updateStudent(@PathVariable("id") Long id, @RequestBody Student student) {
        return studentService.updateStudent(id, student);
    }
 
    @DeleteMapping("/{id}")
    public void deleteStudent(@PathVariable("id") Long id) {
        studentService.deleteStudent(id);
    }
}



package com.example.internshipsystem.service;
 
import com.example.internshipsystem.entity.Student;
import java.util.List;
 
public interface StudentService {
    List<Student> findAllStudents();
    Student findStudentById(Long id);
    Student createStudent(Student student);
    Student updateStudent(Long id, Student student);
    void deleteStudent(Long id);
}

在这个简化版本中,我们定义了一个学生服务接口和一个学生控制器。在实际的系统中,您还需要实现StudentService接口,并添加相应的数据访问层代码。这个示例展示了如何使用Spring Boot创建REST API,并提供了基本的CRUD操作。

2024-09-02

在Spring Boot应用中进行远程接口外网调试,可以通过以下步骤实现:

  1. 修改application.propertiesapplication.yml配置文件,开启远程调试端口。
  2. 使用Spring Boot Actuator监控端点暴露应用的内部信息。
  3. 使用Jolokia,一个用于暴露JVM信息的HTTP服务。

以下是配置远程调试和HTTP服务监听的示例:

application.properties配置文件中添加:




# 启用远程调试
spring.datasource.url=jdbc:h2:mem:testdb
spring.jpa.database-platform=org.hibernate.dialect.H2Dialect
 
# 远程调试配置
spring.remote_debug.server.port=5005
spring.datasource.driver-class-name=org.h2.Driver
spring.datasource.username=sa
spring.datasource.password=
 
# Jolokia配置
endpoints.jolokia.enabled=true
endpoints.jolokia.base-path=/jolokia

application.yml配置文件中添加:




spring:
  datasource:
    url: jdbc:h2:mem:testdb
    driver-class-name: org.h2.Driver
    username: sa
    password: 
 
---

server:
  port: 5005
  remote-debugging:
    enabled: true
 
management:
  endpoints:
    web:
      exposure:
        include: "*"
  jolokia:
    enabled: true
    base-path: /jolokia

启动参数添加:




-agentlib:jdwp=transport=dt_socket,server=y,suspend=n,address=5005

确保你的服务器安全组和防火墙设置允许5005端口(远程调试端口)和8080端口(HTTP服务端口)的入站连接。

在完成这些配置后,你可以使用远程调试工具(如IntelliJ IDEA或Eclipse)连接到服务器的5005端口进行调试,同时可以通过HTTP客户端访问http://<hostname>:8080/jolokia来获取JVM的监控信息。

2024-09-02

在Spring WebFlux中,我们可以使用Flux来创建一个流式响应。以下是一个简单的例子,展示如何使用Flux创建一个流式响应:




import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;
import reactor.core.publisher.Flux;
 
@RestController
public class StreamingController {
 
    @GetMapping("/stream")
    public Flux<String> stream() {
        return Flux.just("Hello", "World", "!")
                   .delayElements(Duration.ofSeconds(1)) // 每秒发送一个元素
                   .log(); // 添加日志记录
    }
}

在这个例子中,我们创建了一个名为StreamingController的控制器,并定义了一个名为stream的方法。这个方法返回一个Flux<String>,它每秒发送一个元素,内容分别是"Hello","World","!"。我们使用delayElements方法来设置发送元素的间隔,并使用log方法来记录流中的事件。

访问/stream端点时,客户端会接收到这样的流式响应。由于WebFlux是响应式的,服务端不会阻塞,可以同时处理多个请求。

2024-09-02

以下是一个简化的Spring Boot项目中整合Redis, MyBatis和JWT的示例:

  1. pom.xml中添加依赖:



<!-- Spring Boot Starter for Redis -->
<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-data-redis</artifactId>
</dependency>
<!-- MyBatis Starter -->
<dependency>
    <groupId>org.mybatis.spring.boot</groupId>
    <artifactId>mybatis-spring-boot-starter</artifactId>
    <version>2.1.3</version>
</dependency>
<!-- JWT -->
<dependency>
    <groupId>io.jsonwebtoken</groupId>
    <artifactId>jjwt</artifactId>
    <version>0.9.1</version>
</dependency>
  1. 配置application.propertiesapplication.yml文件:



# Redis
spring.redis.host=localhost
spring.redis.port=6379
 
# MyBatis
mybatis.mapper-locations=classpath:mapper/*.xml
mybatis.type-aliases-package=com.example.package.model
 
# JWT
jwt.secret=your_secret_key
jwt.expiration=3600000
  1. 创建Redis配置类:



@Configuration
public class RedisConfig {
 
    @Bean
    public RedisTemplate<String, Object> redisTemplate(LettuceConnectionFactory connectionFactory) {
        final RedisTemplate<String, Object> template = new RedisTemplate<>();
        template.setConnectionFactory(connectionFactory);
        return template;
    }
}
  1. 创建JWT工具类:



@Component
public class JwtTokenUtil {
 
    private String secret;
    private long expiration;
 
    public JwtTokenUtil(@Value("${jwt.secret}") String secret,
                        @Value("${jwt.expiration}") long expiration) {
        this.secret = secret;
        this.expiration = expiration;
    }
 
    public String generateToken(UserDetails userDetails) {
        return Jwts.builder()
                .setSubject(userDetails.getUsername())
                .setExpiration(new Date(System.currentTimeMillis() + expiration))
                .signWith(SignatureAlgorithm.HS512, secret)
                .compact();
    }
 
    public boolean validateToken(String token, UserDetails userDetails) {
        String username = Jwts.parser()