本篇内容介绍了“Spring security登录实现原理是什么”的有关知识，在实际案例的操作过程中，不少人都会遇到这样的困境，接下来就让小编带领大家学习一下如何处理这些情况吧！希望大家仔细阅读，能够学有所成！
1. 新建项目
引入web和security包
完整的pom.xml文件如下
<?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>2.2.6.RELEASE</version> <relativePath/> <!-- lookup parent from repository --> </parent> <groupId>com.example</groupId> <artifactId>spring-demo</artifactId> <version>0.0.1-SNAPSHOT</version> <name>spring-demo</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-security</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-test</artifactId> <scope>test</scope> <exclusions> <exclusion> <groupId>org.junit.vintage</groupId> <artifactId>junit-vintage-engine</artifactId> </exclusion> </exclusions> </dependency> <dependency> <groupId>org.springframework.security</groupId> <artifactId>spring-security-test</artifactId> <scope>test</scope> </dependency> </dependencies> <build> <plugins> <plugin> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-maven-plugin</artifactId> </plugin> </plugins> </build> </project>
2. 编写启动类和控制器方法和自定义登录页面
package com.example.springdemo;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;
@RestController
@SpringBootApplication
public class SpringDemoApplication {
public static void main(String[] args) {
SpringApplication.run(SpringDemoApplication.class, args);
}
@GetMapping("/")
public String hello() {
return "hello spring security";
}
}<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>Title</title> </head> <body> <form action="myLogin.html" method="post"> <input type="text" name="username"> <input type="password" name="password"> <input type="submit" value="登录"> </form> </body> </html>
3. 编写配置类
package com.example.springdemo.conf;
import org.springframework.security.config.annotation.web.builders.HttpSecurity;
import org.springframework.security.config.annotation.web.configuration.EnableWebSecurity;
import org.springframework.security.config.annotation.web.configuration.WebSecurityConfigurerAdapter;
import org.springframework.security.core.Authentication;
import org.springframework.security.core.AuthenticationException;
import org.springframework.security.web.authentication.AuthenticationFailureHandler;
import org.springframework.security.web.authentication.AuthenticationSuccessHandler;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.PrintWriter;
@EnableWebSecurity
public class WebSecurityConfig extends WebSecurityConfigurerAdapter {
@Override
protected void configure(HttpSecurity http) throws Exception {
http.authorizeRequests()
.anyRequest().authenticated()
.and()
.formLogin()
//指定处理登录页面
.loginPage("/myLogin.html")
//指定登录成功的处理逻辑
.successHandler(new AuthenticationSuccessHandler() {
@Override
public void onAuthenticationSuccess(HttpServletRequest request,
HttpServletResponse response,
Authentication authentication)
throws IOException, ServletException {
response.setContentType("application/json;charset=UTF-8");
PrintWriter writer = response.getWriter();
writer.write("{\"error_code\":\"0\",\"message\":\"欢迎登录\"}");
}
})
//指定登录失败时的处理逻辑
.failureHandler(new AuthenticationFailureHandler() {
@Override
public void onAuthenticationFailure(HttpServletRequest request,
HttpServletResponse response,
AuthenticationException e)
throws IOException, ServletException {
response.setStatus(401);
PrintWriter writer = response.getWriter();
writer.write("{\"error_code\":\"401\",\"name\":\"" + e.getClass() + "\",\"message\":\"" + e.getMessage() + "\"}");
}
})
.permitAll()
.and()
.csrf().disable();
}
}4. 运行结果
当输入密码错误时
当输入密码正确时
“Spring security登录实现原理是什么”的内容就介绍到这里了，感谢大家的阅读。如果想了解更多行业相关的知识可以关注亿速云网站，小编将为大家输出更多高质量的实用文章！
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