我創建了一個自定義 SQLDataset 實現，它接受一個 SQL 查詢并將 LinkedHashmap 列表返回給請求控制器，以便在 JSP 中顯示或以 Excel 格式下載。您能否讓我知道該方法是否是線程安全的？SqlDataset.javapackage com.sqle.core;import com.util.QueryProcessor;import java.io.Serializable;import java.sql.ResultSet;import java.sql.ResultSetMetaData;import java.sql.SQLException;import java.util.ArrayList;import java.util.LinkedHashMap;import java.util.List;import java.util.Map;public class SqlDataset implements Serializable {    private String query;    private QueryProcessor qp;    private ResultSet rsSet;    private List<LinkedHashMap<String, Object>> rsList = new ArrayList<>();    private ArrayList<String> dataHeader = new ArrayList<>();    public SqlDataset() {}    public SqlDataset(String uquery) {        this.query = uquery;    }    private ResultSet getQueryResult() throws Exception {        qp = new QueryProcessor(query);        this.rsSet = qp.getQueryResultSet();        return this.rsSet;    }    public List<LinkedHashMap<String, Object>> getResult() throws Exception {        return this.getValues(this.getQueryResult());    }    public List<LinkedHashMap<String, Object>> getResult(String query) throws Exception {        this.query = query;        return this.getValues(this.getQueryResult());    }    public int getRowCount() {        return this.rsList.size();    }    public ArrayList getHeaders() {        for (LinkedHashMap<String, Object> aRsList : this.rsList) {            for (Map.Entry<String, Object> dh : aRsList.entrySet()) {                if (!this.dataHeader.contains(dh.getKey()))                    this.dataHeader.add(dh.getKey());            }        }        return this.dataHeader;    }