I want to generate report using jasperreport and spring boot. The problem is that my class has relations with other classes ( e.g ManyToOne).Please how to print data of my class and of the other classes in the same report. Igot this error in the browser ( Error evaluating expression for source text: $F{domain} ) and in the console (ma.te.sa.ab.model.Domain cannot be cast to java.lang.String). A part of my class : public class Risque { @Id @GeneratedValue(strategy = GenerationType.SEQUENCE, generator = "CUST_SEQ") @SequenceGenerator(sequenceName = "customer_seq", initialValue = 1, allocationSize = 1, name = "CUST_SEQ") private Long id; private String titre; private String description; private String responsable; @ManyToOne(fetch = FetchType.EAGER) private Domain domain; @ManyToOne(fetch = FetchType.EAGER) private Probabilite probabilite; @ManyToOne(fetch = FetchType.EAGER) private Gravite gravite; @ManyToOne(fetch = FetchType.EAGER) private Criticite criticite; // getters ans setters
