Cannot resolve symbol 'JwtTokenProvider'在下面这段代码中,请帮我修改。import org.springframework.beans.factory.annotation.Autowired; import org.springframework.context.annotation.Bean; import org.springframework.context.annotation.Configuration; import org.springframework.http.HttpMethod; import org.springframework.security.config.annotation.web.builders.HttpSecurity; import org.springframework.security.config.annotation.web.builders.WebSecurity; import org.springframework.security.config.annotation.web.configuration.EnableWebSecurity; import org.springframework.security.config.annotation.web.configuration.WebSecurityConfigurerAdapter; import org.springframework.security.crypto.bcrypt.BCryptPasswordEncoder; import org.springframework.security.crypto.password.PasswordEncoder; import org.springframework.security.web.authentication.UsernamePasswordAuthenticationFilter; @Configuration @EnableWebSecurity public class SecurityConfig extends WebSecurityConfigurerAdapter { @Autowired private JwtTokenProvider jwtTokenProvider; @Override protected void configure(HttpSecurity http) throws Exception { http.csrf().disable() .addFilterBefore(new JwtTokenFilter(jwtTokenProvider), UsernamePasswordAuthenticationFilter.class) .authorizeRequests() .antMatchers("/api/**").authenticated() .anyRequest().permitAll(); } @Override public void configure(WebSecurity web) throws Exception { web.ignoring().antMatchers(HttpMethod.OPTIONS, "/**"); } @Bean public PasswordEncoder passwordEncoder() { return new BCryptPasswordEncoder(12); } }
时间: 2023-12-14 19:37:07 浏览: 25
根据错误提示,你缺少了一个名为`JwtTokenProvider`的bean。你需要先创建一个`JwtTokenProvider`类,然后在配置类中注入它。下面是一个简单的示例:
```
import org.springframework.stereotype.Component;
@Component
public class JwtTokenProvider {
// your implementation
}
```
接着,在配置类中添加`@Autowired`注解来注入`JwtTokenProvider`实例:
```
@Configuration
@EnableWebSecurity
public class SecurityConfig extends WebSecurityConfigurerAdapter {
@Autowired
private JwtTokenProvider jwtTokenProvider;
// your other configurations
}
```
这样就可以解决`Cannot resolve symbol 'JwtTokenProvider'`的问题了。
相关问题
import org.springframework.boot.SpringApplication; Cannot resolve symbol 'SpringApplication'
这个错误提示表明在你的代码中找不到名为'SpringApplication'的符号。通常这种情况是由于缺少相关的依赖库或者导入的包名不正确所导致的。在这种情况下,你可以尝试以下几个步骤来解决这个问题:
1. 确认你的项目中已经正确地添加了相关的依赖库。在这个例子中,你需要添加Spring Boot的依赖库。你可以在项目的pom.xml文件中添加以下依赖:
```
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter</artifactId>
<version>2.5.4</version>
</dependency>
```
2. 确认你的代码中正确地导入了相关的包。在这个例子中,你需要导入org.springframework.boot.SpringApplication包。你可以在你的代码中添加以下导入语句:
```
import org.springframework.boot.SpringApplication;
```
3. 如果你已经添加了正确的依赖库和导入了正确的包,但是仍然遇到了这个问题,那么你可能需要清理你的项目并重新构建它。你可以尝试使用以下命令清理你的项目:
```
mvn clean
```
然后重新构建你的项目:
```
mvn install
```
import org.springframework.beans.factory.annotation.Autowired; import org.springframework.context.annotation.Bean; import org.springframework.context.annotation.Configuration; import org.springframework.http.HttpMethod; import org.springframework.security.config.annotation.web.builders.HttpSecurity; import org.springframework.security.config.annotation.web.builders.WebSecurity; import org.springframework.security.config.annotation.web.configuration.EnableWebSecurity; import org.springframework.security.config.annotation.web.configuration.WebSecurityConfigurerAdapter; import org.springframework.security.crypto.bcrypt.BCryptPasswordEncoder; import org.springframework.security.crypto.password.PasswordEncoder; import org.springframework.security.web.authentication.UsernamePasswordAuthenticationFilter; @Configuration @EnableWebSecurity public class SecurityConfig extends WebSecurityConfigurerAdapter { @Bean public JwtTokenProvider jwtTokenProvider() { return new JwtTokenProvider(); } @Autowired private JwtTokenProvider jwtTokenProvider; @Override protected void configure(HttpSecurity http) throws Exception { http.csrf().disable() .addFilterBefore(new JwtTokenFilter(jwtTokenProvider), UsernamePasswordAuthenticationFilter.class) .authorizeRequests() .antMatchers("/api/").authenticated() .anyRequest().permitAll(); } @Override public void configure(WebSecurity web) throws Exception { web.ignoring().antMatchers(HttpMethod.OPTIONS, "/"); } @Bean public PasswordEncoder passwordEncoder() { return new BCryptPasswordEncoder(12); } }报错信息:Cannot resolve symbol 'JwtTokenFilter',如何创建一个JwtTokenFilter类,让代码不报错
你需要创建一个名为 JwtTokenFilter 的类,代码如下:
```
import io.jsonwebtoken.ExpiredJwtException;
import org.springframework.security.authentication.UsernamePasswordAuthenticationToken;
import org.springframework.security.core.Authentication;
import org.springframework.security.core.context.SecurityContextHolder;
import org.springframework.security.web.authentication.WebAuthenticationDetailsSource;
import org.springframework.stereotype.Component;
import org.springframework.web.filter.OncePerRequestFilter;
import javax.servlet.FilterChain;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
@Component
public class JwtTokenFilter extends OncePerRequestFilter {
private final JwtTokenProvider jwtTokenProvider;
public JwtTokenFilter(JwtTokenProvider jwtTokenProvider) {
this.jwtTokenProvider = jwtTokenProvider;
}
@Override
protected void doFilterInternal(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, FilterChain filterChain) throws ServletException, IOException {
String token = jwtTokenProvider.resolveToken(httpServletRequest);
try {
if (token != null && jwtTokenProvider.validateToken(token)) {
Authentication auth = jwtTokenProvider.getAuthentication(token);
if (auth != null) {
SecurityContextHolder.getContext().setAuthentication(auth);
}
}
} catch (ExpiredJwtException e) {
httpServletResponse.setStatus(HttpServletResponse.SC_UNAUTHORIZED);
httpServletResponse.sendError(HttpServletResponse.SC_UNAUTHORIZED, "Token已过期");
return;
}
filterChain.doFilter(httpServletRequest, httpServletResponse);
}
}
```
在上面的代码中,我们创建了一个 JwtTokenFilter 类,它继承了 OncePerRequestFilter 类。JwtTokenFilter 类中包含了我们在之前创建的 JwtTokenProvider 对象,以及 doFilterInternal() 方法,该方法是实际执行 JWT 验证的地方。
在 doFilterInternal() 方法中,我们首先从请求中获取 JWT Token,并调用 JwtTokenProvider 对象中的方法来验证 Token 是否有效。如果 Token 有效,我们使用 JwtTokenProvider 对象的 getAuthentication() 方法来获取用户的身份验证对象,然后将其设置为 SecurityContext 中的认证对象。最后,我们调用 FilterChain 对象的 doFilter() 方法,以便请求可以继续进行处理。
请注意,在上面的代码中,我们使用了 @Component 注解将 JwtTokenFilter 类声明为 Spring 组件。这样,Spring 将负责创建 JwtTokenFilter 对象,并将其注入到 SecurityConfig 类中。