JSON字符串轉換object錯誤：MorphDynaBean cannot be cast to com.softri

JSON字符串轉換object錯誤：MorphDynaBean cannot be cast to com.softright.bean.TestBean，類中有集合類型的屬性 因為JSONObject.toBean()把JSON字符串轉換為一個自己定義的類，當其中屬性有類似List , Map ,ArrayList的時候，麻煩就來了

錯誤：MorphDynaBean cannot be cast to com.softright.bean.TestBean

解決方法：

在JSONObject.toBean的時候

如果轉換的類中有集合,可以先定義Map<String, Class> classMap = new HashMap<String, Class>();

在classMap中put你要轉換的類中的集合名,像:classMap.put("data", StoDataInfo.class);

當然也可以put一個集合類("data",Map.class)

然後在toBean()的時候把參數加上, 像:ShenTongInfo stInfo=(ShenTongInfo) JSONObject.toBean(o, ShenTongInfo.class, classMap);

具體實例

public class JsonConvertorDemo { 

public static void main(String[] args) { 
B b1 = new B("b1"); 
Map<String, B> bMap = new HashMap<String, B>(); 
bMap.put("key1", b1); 
A a1 = new A(bMap); 

JSONObject jsonObject = JSONObject.fromObject(a1); 
String json = jsonObject.toString(); 
jsonObject = JSONObject.fromObject(json); 

Map<String, Class> classMap = new HashMap<String, Class>(); 
classMap.put("bMap", Map.class); 
a1 = (A) JSONObject.toBean(jsonObject, A.class, classMap); 

bMap = a1.getbMap(); 
System.out.println(bMap.get("key1").getB1()); 
} 
} 

public class A { 
private Map<String, B> bMap = new HashMap<String, B>(); 
public A() {} 
public A(Map<String, B> bMap) { 
this.bMap = bMap; 
} 
public Map<String, B> getbMap() { 
return bMap; 
} 
public void setbMap(Map<String, B> bMap) { 
this.bMap = bMap; 
} 
} 

public class B { 
private String b1; 
public B() {} 
public B(String b1) { 
this.b1 = b1; 
} 
public String getB1() { 
return b1; 
} 
public void setB1(String b1) { 
this.b1 = b1; 
} 
}