diff --git a/src/org/nutz/lang/inject/InjectBySetter.java b/src/org/nutz/lang/inject/InjectBySetter.java
index 072d9664a..ec579c741 100644
--- a/src/org/nutz/lang/inject/InjectBySetter.java
+++ b/src/org/nutz/lang/inject/InjectBySetter.java
@@ -1,8 +1,12 @@
 package org.nutz.lang.inject;
 
 import java.lang.reflect.Method;
+import java.lang.reflect.Type;
+import java.util.Collection;
+import java.util.Map;
 
 import org.nutz.castor.Castors;
+import org.nutz.json.Json;
 import org.nutz.lang.Lang;
 import org.nutz.log.Log;
 import org.nutz.log.Logs;
@@ -13,16 +17,25 @@ public class InjectBySetter implements Injecting {
     
     private Method setter;
     private Class<?> valueType;
+    private Type type;
+    private boolean isMapCollection;
 
     public InjectBySetter(Method setter) {
         this.setter = setter;
         valueType = setter.getParameterTypes()[0];
+        type = setter.getGenericParameterTypes()[0];
+        isMapCollection = Map.class.isAssignableFrom(valueType) ||
+                       Collection.class.isAssignableFrom(valueType);
     }
 
     public void inject(Object obj, Object value) {
         Object v = null;
         try {
-            v = Castors.me().castTo(value, valueType);
+            if (isMapCollection && value != null && value instanceof String) {
+                v = Json.fromJson(type, value.toString());
+            } else {
+                v = Castors.me().castTo(value, valueType);
+            }
             setter.invoke(obj, v);
         }
         catch (Exception e) {
diff --git a/test/org/nutz/dao/test/meta/issue928/BeanWithSet.java b/test/org/nutz/dao/test/meta/issue928/BeanWithSet.java
new file mode 100644
index 000000000..d16d078b4
--- /dev/null
+++ b/test/org/nutz/dao/test/meta/issue928/BeanWithSet.java
@@ -0,0 +1,43 @@
+package org.nutz.dao.test.meta.issue928;
+
+import java.util.Set;
+
+import org.nutz.dao.entity.annotation.Id;
+import org.nutz.dao.entity.annotation.Table;
+
+@Table("t_bean_with_set")
+public class BeanWithSet {
+
+    @Id
+    private long id;
+    
+    private Set<Long> uids;
+    
+    private Set<String> names;
+
+    public long getId() {
+        return id;
+    }
+
+    public void setId(long id) {
+        this.id = id;
+    }
+
+    public Set<Long> getUids() {
+        return uids;
+    }
+
+    public void setUids(Set<Long> uids) {
+        this.uids = uids;
+    }
+
+    public Set<String> getNames() {
+        return names;
+    }
+
+    public void setNames(Set<String> names) {
+        this.names = names;
+    }
+    
+    
+}
diff --git a/test/org/nutz/dao/test/normal/SimpleDaoTest.java b/test/org/nutz/dao/test/normal/SimpleDaoTest.java
index b6c197ecf..c9eed218a 100644
--- a/test/org/nutz/dao/test/normal/SimpleDaoTest.java
+++ b/test/org/nutz/dao/test/normal/SimpleDaoTest.java
@@ -9,7 +9,9 @@
 import java.math.BigDecimal;
 import java.sql.Timestamp;
 import java.util.ArrayList;
+import java.util.HashSet;
 import java.util.List;
+import java.util.Set;
 
 import org.junit.Test;
 import org.nutz.Nutz;
@@ -45,6 +47,7 @@
 import org.nutz.dao.test.meta.issue726.Issue726;
 import org.nutz.dao.test.meta.issue901.XPlace;
 import org.nutz.dao.test.meta.issue918.Region;
+import org.nutz.dao.test.meta.issue928.BeanWithSet;
 import org.nutz.dao.util.Daos;
 import org.nutz.dao.util.blob.SimpleBlob;
 import org.nutz.dao.util.blob.SimpleClob;
@@ -476,4 +479,26 @@ public void test_xxx() {
     public void test_issue_918() {
         dao.create(Region.class, true); 
     }
+    
+    @Test
+    public void test_issue_928() {
+        dao.create(BeanWithSet.class, true);
+        BeanWithSet s = new BeanWithSet();
+        Set<Long> uids = new HashSet<Long>();
+        Long UID = 1234455656L;
+        uids.add(UID);
+        s.setUids(uids);
+        
+        Set<String> names = new HashSet<String>();
+        names.add("wendal");
+        s.setNames(names);
+        System.out.println(names);
+        
+        dao.insert(s);
+        
+        BeanWithSet out = dao.fetch(BeanWithSet.class);
+        assertEquals(Long.class, out.getUids().iterator().next().getClass());
+        assertEquals(UID, out.getUids().iterator().next());
+        
+    }
 }