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修复 NoClassDefFoundError 的问题

src/main/java/com/ilummc/tlib/util/Ref.java

@@ -0,0 +1,59 @@
+package com.ilummc.tlib.util;
+
+import com.ilummc.tlib.util.asm.AsmAnalyser;
+import org.objectweb.asm.ClassReader;
+import org.objectweb.asm.ClassWriter;
+
+import javax.annotation.concurrent.ThreadSafe;
+import java.io.IOException;
+import java.lang.reflect.Field;
+import java.util.Collections;
+import java.util.List;
+import java.util.Map;
+import java.util.Objects;
+import java.util.concurrent.ConcurrentHashMap;
+import java.util.stream.Collectors;
+
+@ThreadSafe
+public class Ref {
+
+    private static final Map<String, List<Field>> cachedFields = new ConcurrentHashMap<>();
+
+    public static final int ACC_BRIDGE = 0x0040;
+    public static final int ACC_SYNTHETIC = 0x1000;
+
+    public static List<Field> getDeclaredFields(Class<?> clazz) {
+        return getDeclaredFields(clazz, 0, false);
+    }
+
+    public static List<Field> getDeclaredFields(String clazz, int excludeModifiers, boolean cache) {
+        try {
+            return getDeclaredFields(Class.forName(clazz), excludeModifiers, cache);
+        } catch (ClassNotFoundException e) {
+            return Collections.emptyList();
+        }
+    }
+
+    public static List<Field> getDeclaredFields(Class<?> clazz, int excludeModifiers, boolean cache) {
+        try {
+            Class.forName("org.objectweb.asm.ClassVisitor");
+            List<Field> fields;
+            if ((fields = cachedFields.get(clazz.getName())) != null) return fields;
+            ClassReader classReader = new ClassReader(clazz.getResourceAsStream("/" + clazz.getName().replace('.', '/') + ".class"));
+            AsmAnalyser analyser = new AsmAnalyser(new ClassWriter(ClassWriter.COMPUTE_MAXS), excludeModifiers);
+            classReader.accept(analyser, ClassReader.SKIP_DEBUG);
+            fields = analyser.getFields().stream().map(name -> {
+                try {
+                    return clazz.getDeclaredField(name);
+                } catch (Throwable ignored) {
+                }
+                return null;
+            }).filter(Objects::nonNull).collect(Collectors.toList());
+            if (cache) cachedFields.putIfAbsent(clazz.getName(), fields);
+            return fields;
+        } catch (Exception e) {
+            return Collections.emptyList();
+        }
+    }
+
+}