```java
import com.fasterxml.jackson.annotation.JsonFormat;
import io.swagger.v3.oas.annotations.media.Schema;
import jakarta.validation.constraints.NotBlank;
import jakarta.validation.constraints.NotNull;
import lombok.Data;
import lombok.Getter;
import org.springframework.format.annotation.DateTimeFormat;
import com.fasterxml.jackson.databind.annotation.JsonSerialize;
import com.fasterxml.jackson.databind.ser.std.ToStringSerializer;
import java.io.Serial;
import java.io.Serializable;
import java.time.LocalDate;
import java.time.LocalDateTime;
import java.math.BigDecimal;

@Data
@Schema(title = "DTO示例")
public class ExampleDTO implements Serializable {

    @Serial
    private static final long serialVersionUID = 1L;

    @Schema(description = "ID")
    @JsonSerialize(using = ToStringSerializer.class)
    private Long id;

    @NotBlank
    @Schema(description = "字符串")
    private String strField;

    @Schema(description = "整数", defaultValue = "0")
    private Integer intField;

    @Schema(description = "长整数")
    @JsonSerialize(using = ToStringSerializer.class)
    private Long longField;

    @Schema(description = "高精度浮点数")
    private BigDecimal decimalField;

    @NotNull
    @Schema(description = "日期类型", pattern = "yyyy-MM-dd")
    @DateTimeFormat(pattern = "yyyy-MM-dd")
    @JsonFormat(pattern = "yyyy-MM-dd", timezone = "GMT+8")
    private LocalDate dateField;

    @NotNull
    @Schema(description = "时间类型", pattern = "yyyy-MM-dd HH:mm:ss")
    @DateTimeFormat(pattern = "yyyy-MM-dd HH:mm:ss")
    @JsonFormat(pattern = "yyyy-MM-dd HH:mm:ss", timezone = "GMT+8")
    private LocalDateTime timeField;

    @NotNull
    @Schema(
        title = "状态",
        description = "参考示例值",
        example = StateEnum.DESC
    )
    private StateEnum state;

    @Schema(description = "JSON类型")
    private JsonField jsonField;

    @Data
    public static class JsonField implements Serializable {
        
        @Serial
        private static final long serialVersionUID = 1L;
        
        @Schema(description = "示例字段1")
        private String field1;
        
        @Schema(description = "示例字段2")
        private Integer field2;
    }
    
}
```