Question

如果您有两个班级列表，您如何比较它们以查看它们是否相同，无论顺序如何。

Class[] list1[class1, class1, class2]
Class[] list2[class2, class1, class1]

这些列表无论顺序如何都相同但java布尔怎么样呢？ e.g

if(list1.sort == list2.sort){}

Answer 1

最佳解决方案是添加Guava并使用MultiSet。

HashMultiset<Class> hms1 = new HashMultiSet<>();
HashMultiset<Class> hms1 = new HashMultiSet<>();
for (Class c : list1) {
    hms1.add(c);
}
for (Class c : list2) {
    hms2.add(c);
}
if (hms1.equals(hms2) {
    //lists are the same in your understanding of the same
}

更简单的解决方案是使用Map<Class, Integer>

HashMap<Class, Integer> hm1 = new HashMap<>();
HashMap<Class, Integer> hm2 = new HashMap<>();
for (Class c : list1) {
    if (!hm1.containsKey(c)) {
        hm1.put(c, 1);
    } else {
        hm1.put(c, hm1.get(c)+1);
    }
}
for (Class c : list2) {
    if (!hm2.containsKey(c)) {
        hm2.put(c, 1);
    } else {
        hm2.put(c, hm2.get(c)+1);
    }
}
if (hm1.equals(hm2) {
    //lists are the same in your understanding of the same
}

Answer 2

    Class<?>[] list1 = new Class[] { String.class, String.class, Integer.class };
    Class<?>[] list2 = new Class[] { Integer.class, String.class, String.class };

    Comparator<Class<?>> classComparator = new Comparator<Class<?>>() {

        @Override
        public int compare(Class<?> o1, Class<?> o2) {
            return o1.getCanonicalName().compareTo(o2.getCanonicalName());
        }
    };

    Arrays.sort(list1, classComparator);
    Arrays.sort(list2, classComparator);

    if (Arrays.equals(list1, list2)) {
        System.out.println("same regardless of order");
    } else {
        System.out.println("NOT same regardless of order");
    }

以上打印

same regardless of order

我正在修改原始列表。如果不需要，您可能需要先复印。

Arrays.equals()正在使用Class.equals()，而Object.equals()只是public override Task ValidateTokenRequest(ValidateTokenRequestContext context) { // Reject the token request if it doesn't use grant_type=password, refresh_token // or urn:ietf:params:oauth:grant-type:facebook_access_token. if (!context.Request.IsPasswordGrantType() && !context.Request.IsRefreshTokenGrantType() && context.Request.GrantType != "urn:ietf:params:oauth:grant-type:facebook_access_token") { context.Reject( error: OpenIdConnectConstants.Errors.UnsupportedGrantType, description: "The specified grant type is not supported by this server."); return Task.FromResult(0); } // Reject the token request if the assertion parameter is missing. if (context.Request.GrantType == "urn:ietf:params:oauth:grant-type:facebook_access_token" && string.IsNullOrEmpty(context.Request.Assertion)) { context.Reject( error: OpenIdConnectConstants.Errors.InvalidRequest, description: "The assertion is missing."); return Task.FromResult(0); } // Since there's only one application and since it's a public client // (i.e a client that cannot keep its credentials private), call Skip() // to inform the server the request should be accepted without // enforcing client authentication. context.Skip(); return Task.FromResult(0); } public override Task HandleTokenRequest(HandleTokenRequestContext context) { // Only handle grant_type=password and urn:ietf:params:oauth:grant-type:facebook_access_token // requests and let the OpenID Connect server middleware handle the refresh token requests. if (context.Request.IsPasswordGrantType()) { // Skipped for brevity. } else if (context.Request.GrantType == "urn:ietf:params:oauth:grant-type:facebook_access_token") { // The assertion corresponds to the Facebook access token. var assertion = context.Request.Assertion; // Create a new ClaimsIdentity containing the claims that // will be used to create an id_token and/or an access token. var identity = new ClaimsIdentity(OpenIdConnectServerDefaults.AuthenticationScheme); // Validate the access token using Facebook's token validation // endpoint and add the user claims you retrieved here. identity.AddClaim(ClaimTypes.NameIdentifier, "FB user identifier"); // Create a new authentication ticket holding the user identity. var ticket = new AuthenticationTicket( new ClaimsPrincipal(identity), new AuthenticationProperties(), OpenIdConnectServerDefaults.AuthenticationScheme); // Set the list of scopes granted to the client application. ticket.SetScopes(new[] { /* openid: */ OpenIdConnectConstants.Scopes.OpenId, /* email: */ OpenIdConnectConstants.Scopes.Email, /* profile: */ OpenIdConnectConstants.Scopes.Profile, /* offline_access: */ OpenIdConnectConstants.Scopes.OfflineAccess }.Intersect(context.Request.GetScopes())); context.Validate(ticket); } return Task.FromResult(0); }。只要每个类只有一个Class对象，就可以了。我相信只要你只使用一个类加载器就可以了。所以请注意，这里有点微妙。

Java：无论顺序如何，比较两个类列表

2 个答案: