JSON Learning Series (5)-json Error Resolution Net.sf.ezmorph.bean.MorphDynaBean cannot is cast to

Recently, when using JSON, the following error was reported:
Net.sf.ezmorph.bean.MorphDynaBean cannot is cast to java.lang.String
This error is common because JSON is converted to JavaBean by default to the Morphdynabean class. As in the following example:
When the JSON string is JavaBean, the general object can be transferred directly, such as: A student class, the attribute has the name, the age and so on.

 Public classStudentImplementsjava.io.serializable{Private Static Final LongSerialversionuid = 1L; PrivateString sname; PrivateInteger age;  PublicString Getsname () {returnsname; }     Public voidsetsname (String sname) { This. sname =sname; }     PublicInteger getage () {returnAge ; }     Public voidsetage (Integer age) { This. Age =Age ; }    }

You can use the following methods when you go to JavaBean by string:

 String str = "[{\" sname\ ": \" admin\ ", \" age\ ": $}]"  // receives the {} object, there is an exception   to receive the array object, so you need to resolve the  if  (Str.indexof ("[")! = -1 = str.replace ("[", ");             if  (Str.indexof ("]")! = -1) {        str  = str.replace ("]", "" "); }jsonobject jobj  = Jsonobject.fromobject (str); Student s  = (Student) jsonobject.tobean (Jobj,student. Class ); 

This is not a problem, but if the property contains a complex type, when the property has a similar list, map,arraylist is not possible. Error: Morphdynabean cannot is cast to ******. In Jsonobject.tobean, if there is a collection in the converted class, you can define map Classmap = new HashMap (), and put the name of the collection in the Classmap class you want to convert, for example: Classmap.put (" Teachers ", Teacher.class), then add the parameters to the Tobean (), e.g. Student student= (Student) Jsonobject.tobean (str, Student.class, CLASSMAP);
Here is a small example:

 Public classStudentImplementsjava.io.serializable{Private Static Final LongSerialversionuid = 1L; PrivateString sname; PrivateInteger age; PrivateList < String >courses;  PublicString Getsname () {returnsname; }     Public voidsetsname (String sname) { This. sname =sname; }     PublicInteger getage () {returnAge ; }     Public voidsetage (Integer age) { This. Age =Age ; }     PublicList getcourses () {returncourses; }     Public voidsetcourses (List courses) { This. courses =courses; }    }

This is what you need to write when converting:

New HashMap (); Classmap.put ("courses", String. class  = (Student) jsonobject.tobean (str, Student.  Class, Classmap);

JSON Learning Series (5)-json Error Resolution Net.sf.ezmorph.bean.MorphDynaBean cannot is cast to