[JAVA] Display the list in setDetails on the screen with spring-security

Display the property of the list of arbitrary objects set by UsernamePasswordAuthenticationToken # setDetails in spring-security with Thymeleaf.

Source code

pom.xml


	<parent>
		<groupId>org.springframework.boot</groupId>
		<artifactId>spring-boot-starter-parent</artifactId>
		<version>2.1.9.RELEASE</version>
	</parent>

	<properties>
		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
		<maven.compiler.source>11</maven.compiler.source>
		<maven.compiler.target>11</maven.compiler.target>
	</properties>

	<dependencies>
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-web</artifactId>
		</dependency>
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-security</artifactId>
		</dependency>
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-thymeleaf</artifactId>
		</dependency>
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-devtools</artifactId>
			<optional>true</optional>
		</dependency>
		<dependency>
			<groupId>org.thymeleaf.extras</groupId>
			<artifactId>thymeleaf-extras-springsecurity5</artifactId>
		</dependency>
		<dependency>
			<groupId>org.projectlombok</groupId>
			<artifactId>lombok</artifactId>
		</dependency>
	</dependencies>
import org.springframework.boot.WebApplicationType;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.builder.SpringApplicationBuilder;

@SpringBootApplication
public class App {
  public static void main(String[] args) {
    new SpringApplicationBuilder(App.class).web(WebApplicationType.SERVLET).run(args);
  }
}

For the time being, do not authenticate and just fill in the values with `` `setDetails```.

import java.util.Arrays;

import org.springframework.security.authentication.AuthenticationProvider;
import org.springframework.security.authentication.UsernamePasswordAuthenticationToken;
import org.springframework.security.core.Authentication;
import org.springframework.security.core.AuthenticationException;
import org.springframework.stereotype.Component;

@Component
public class MyAuthenticationProvider implements AuthenticationProvider {

  public Authentication authenticate(Authentication arg0) throws AuthenticationException {
    UsernamePasswordAuthenticationToken t = new UsernamePasswordAuthenticationToken("kagami", "hoge");
    MyDetail d = new MyDetail();
    d.hogeValue = "hoge";
    d.hogeList = Arrays.asList("aaa", "bbb", "ccc");
    t.setDetails(d);
    return t;
  }

  public boolean supports(Class<?> arg0) {
    return true;
  }
}

import java.util.List;

import lombok.Data;

@Data
public class MyDetail {
  String hogeValue;
  List<String> hogeList;
}

If you enter an appropriate id-password on the default login screen, the following html will be displayed.

/springsecsample/src/main/resouces/templates/index.html


<!DOCTYPE html>
<html xmlns:th="http://www.thymeleaf.org"
	xmlns:sec="http://www.thymeleaf.org/extras/spring-security">
<body>
	<div th:text="${#authentication.details.hogeValue}"></div>
	<table>
		<tr th:each="hoge : ${#authentication.details.hogeList}">
			<td th:text="${hoge}"></td>
		</tr>
	</table>
</body>
</html>

As you can see at https://github.com/thymeleaf/thymeleaf-extras-springsecurity, `#authentication``` is the spring-security authentication object (here MyAuthenticationProviderreturns UsernamePasswordAuthenticationToken) can be taken. So you can get a list with the property `` `hogeList of that property `` `details```. After that, you can process it with Thymeleaf foreach.

Reference URL

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