我在javaflinkapi上创建了一个小实用程序来学习这些功能。我正在尝试读取csv文件并打印它，我已经为数据结构开发了一个pojo类。当我执行代码时，我看不到正确的值。如何Map属性的数据类型
我的主要课程：

package org.karthick.flinkLab;
import org.apache.flink.api.java.DataSet;
import org.apache.flink.api.java.ExecutionEnvironment;
import javax.xml.crypto.Data;
public class CSVFileRead {
    public static void main(String[] args) throws Exception {
        System.out.println("--CSV File Reader using Flink's Data Set API--");
        ExecutionEnvironment execEnv = ExecutionEnvironment.getExecutionEnvironment();
        DataSet<DataModel> csvInput = execEnv.readCsvFile("C:\\Flink\\Data\\IndividualDetails.csv")
                    .pojoType(DataModel.class);
        csvInput.print();
    }
}

我的pojo类（datamodel.class）

package org.karthick.flinkLab;
import org.apache.flink.api.java.tuple.Tuple;
import org.apache.flink.api.java.tuple.Tuple12;
import java.io.Serializable;
import java.util.Date;
public class DataModel<T extends Tuple>
            extends Tuple12<Integer,String,Date,Integer,String,String,String,String,String,String,Date,String>
            implements Serializable
    {
        public Integer id;
        public String government_id;
        public Date diagnosed_date;
        public Integer age;
        public String detected_city;
        public String detected_district;
        public String detected_state;
        public String nationality;
        public String current_status;
        public Date status_change_date;
        public String notes;
        public DataModel() {};
        public String getNotes() {
            return notes;
        }
        public Date getStatus_change_date() {
            return status_change_date;
        }
        public String getCurrent_status() {
            return current_status;
        }
        public String getNationality() {
            return nationality;
        }
        public String getDetected_state() {
            return detected_state;
        }
        public String getDetected_district() {
            return detected_district;
        }
        public String getDetected_city() {
            return detected_city;
        }
        public String gender    ;
        public Date getDiagnosed_date() {
            return diagnosed_date;
        }
        public String getGender() {
            return gender;
        }
        public Integer getAge() {
            return age;
        }
        public Integer getId() {
            return id;
        }
        public void setId(Integer id) {
            this.id = id;
        }
        public String getGovernment_id() {
            return government_id;
        }
        public void setGovernment_id(String government_id) {
            this.government_id = government_id;
        }
}

当我执行main方法时，我看不到正确的值。样品结果

(0,,Tue May 19 16:50:38 IST 2020,0,,,,,,,Tue May 19 16:50:38 IST 2020,)

像我期望的那样

(2777,AP,Tue May 19 16:50:38 IST 2020,0,A,B,C,D,E,F,Tue May 19 16:50:38 IST 2020,G)

这里可能少了什么？