bug fixed for springStat

src/main/java/com/alibaba/druid/support/spring/stat/SpringMethodInfo.java

@@ -56,7 +56,7 @@ public class SpringMethodInfo {
         }
         
         for (int i = 0; i < method.getParameterTypes().length; ++i) {
-            if (method.getParameterTypes()[i].getName().equals(other.method.getParameterTypes()[i].getName())) {
+            if (!method.getParameterTypes()[i].getName().equals(other.method.getParameterTypes()[i].getName())) {
                 return false;
             }
         }

src/test/java/com/alibaba/druid/bvt/spring/SpringMethodInfoTest.java

@@ -0,0 +1,50 @@
+package com.alibaba.druid.bvt.spring;
+
+import junit.framework.Assert;
+import junit.framework.TestCase;
+
+import com.alibaba.druid.support.spring.stat.SpringMethodInfo;
+import com.alibaba.druid.support.spring.stat.SpringMethodStat;
+import com.alibaba.druid.support.spring.stat.SpringStat;
+
+public class SpringMethodInfoTest extends TestCase {
+
+    public void test_equals() throws Exception {
+        SpringMethodInfo b1 = new SpringMethodInfo(B.class, B.class.getMethod("f", int.class));
+        SpringMethodInfo c = new SpringMethodInfo(C.class, C.class.getMethod("f", int.class));
+        SpringMethodInfo b2 = new SpringMethodInfo(B.class, B.class.getMethod("f", int.class));
+
+        Assert.assertFalse(b1.equals(c));
+        Assert.assertTrue(b1.equals(b1));
+        Assert.assertTrue(b1.equals(b2));
+
+        Assert.assertEquals(B.class.getName(), b1.getClassName());
+        Assert.assertEquals(C.class.getName(), c.getClassName());
+    }
+
+    public void test_get() throws Exception {
+        SpringStat springStat = new SpringStat();
+
+        SpringMethodInfo b1 = new SpringMethodInfo(B.class, B.class.getMethod("f", int.class));
+        SpringMethodInfo b2 = new SpringMethodInfo(B.class, B.class.getMethod("f", int.class));
+
+        SpringMethodStat methodStat1 = springStat.getMethodStat(b1, true);
+        SpringMethodStat methodStat2 = springStat.getMethodStat(b2, true);
+        Assert.assertSame(methodStat1, methodStat2);
+    }
+
+    public static class A {
+
+        public void f(int i) {
+
+        }
+    }
+
+    public static class B extends A {
+
+    }
+
+    public static class C extends A {
+
+    }
+}