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 1，  data: obj_out type ref to cl_abap_conv_out_ce,

           char_test type string,

           hex_test  type xstring,

           obj_in type ref to cl_abap_conv_in_ce.

  obj_out = cl_abap_conv_out_ce=>create( encoding = 'UTF-8' ).
  call method obj_out->convert
    exporting
      data   = char_test
    importing
      buffer = hex_test.

 

2，   
  obj_in = cl_abap_conv_in_ce=>create( encoding = 'UTF-8' ).

  call method obj_in->convert
    exporting
      input = hex_test
    importing
      data  = char_test.