Manually splicing dynamic JSON strings

Preface

Calling a third party requires manual splicing of dynamic JSON character string

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The code implementation is as follows ：

        String  result="{"+"\""+"pageNo"+"\""+":"+"\""+pageNo+"\""+","+"\""+"pageSize"+"\""+":"+"\""+pageSize+"\""+","+"\""+"fetchChild"+"\""+":"+"\""+fetchChild+"\""+"}";