JSON transformations with collections or maps in an entity class

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If it is a general entity:

 Public classStudentImplementsjava.io.serializable{/*** @Fields Serialversionuid:todo*/     Private Static Final LongSerialversionuid = -1943961352036134112l; PrivateString sname; PrivateInteger age;  PublicString Getsname () {returnsname; }     Public voidsetsname (String sname) { This. sname =sname; }     PublicInteger getage () {returnAge ; }     Public voidsetage (Integer age) { This. Age =Age ; }    }

The following methods can be used when you go from string to Java bean:

Jsonobject jobj == (Student) Jsonobject.tobean (jobj,student.  Class);

There is no problem, but if the attribute contains a complex type, when the attribute has a list, Map, ArrayList, custom type, such as list<teacher> teachers, it is not possible. Error: Morphdynabean cannot is cast to con.test ...

If there is a collection in the converted class at Jsonobject.tobean, you can first define map<string, class> classmap = new hashmap<string, class> (); Put the collection name in the class you want to convert in Classmap, like: Classmap.put ("Teachers", Teacher.class), and then add the parameters to Tobean (), like this: Student student= ( Student) Jsonobject.tobean (str, student.class, CLASSMAP);

For example, I define the following types:

Importjava.util.List;/*** * <p>tiltle:analysismodel.java </p>* <p>description: Model class </p>*@authorbiyutong* @date June, 9:37:54 AM *@version: V1.0*/ Public classAnalysismodelImplementsjava.io.serializable{/*** Fixed conditions*/    PrivateList<condition> regularcondtionlist;//    /*** Dynamic Conditions*/    PrivateList<conditionfield>dynamicconfieldlist; /*** Results*/    PrivateList<resultfield>Resultfield; /*** How many data to get before*/    PrivateInteger Topnum; /*** Sequential or random*/    PrivateString Sortflag; /*** Notes*/    PrivateString Remark; /*** Model name*/    PrivateString modelname; /*** The corresponding XML file name*/    PrivateString FileName;  PublicList<condition>getregularcondtionlist () {returnregularcondtionlist; }     Public voidSetregularcondtionlist (list<condition>regularcondtionlist) {         This. regularcondtionlist =regularcondtionlist; }     PublicList<conditionfield>getdynamicconfieldlist () {returndynamicconfieldlist; }     Public voidSetdynamicconfieldlist (list<conditionfield>dynamicconfieldlist) {         This. dynamicconfieldlist =dynamicconfieldlist; }     PublicInteger Gettopnum () {returnTopnum; }     Public voidsettopnum (Integer topnum) { This. Topnum =Topnum; }     PublicString Getsortflag () {returnSortflag; }     Public voidSetsortflag (String sortflag) { This. Sortflag =Sortflag; }     PublicString Getremark () {returnremark; }     Public voidSetremark (String remark) { This. Remark =remark; }         PublicString Getmodelname () {returnmodelname; }     Public voidsetmodelname (String modelname) { This. modelname =modelname; }     PublicList<resultfield>Getresultfield () {returnResultfield; }     Public voidSetresultfield (list<resultfield>Resultfield) {         This. Resultfield =Resultfield; }     PublicString GetFileName () {returnFileName; }     Public voidsetfilename (String fileName) { This. FileName =FileName; }    }

This is what you need to write when converting:

New Hashmap<string, class>(); Classmap.put ("Regularcondtionlist", Condition.  Class); Classmap.put ("Dynamicconfieldlist", Conditionfield. class ); Classmap.put ("Resultfield", Resultfield. class ); Analysismodel Analysismodel= (analysismodel) jsonobject.tobean (str, Analysismodel.  Class, Classmap);

JSON transformations with collections or maps in an entity class