Sample.java

    @Id
    @GeneratedValue(strategy= GenerationType.TABLE, generator = "string_prefix_generator")
    @GenericGenerator(name = "string_prefix_generator", strategy = "com.circlee7.test.util.StringPrefixTableGenerator", parameters = {
            @Parameter(name = "table_name", value = "new_key_numbers"),
            @Parameter(name = "value_column_name", value = "key_number"),
            @Parameter(name = "segment_column_name", value = "name"),
            @Parameter(name = "segment_value", value = "names_key"),
            @Parameter(name = "prefix_key", value = "prg")})
    private String id;