关于javascript:java的CouchBaselite的初次踩坑

CouchBase-lite 是 Couchbase 官网出的一个嵌入式文档数据库，专门编码格调是用于挪动设施应用程序的，其中就有 java 版本。其底层应用的是 sqlite 数据库

以下是我首次踩坑编写的代码

import java.time.LocalDate;
import com.couchbase.lite.CouchbaseLite;

import com.couchbase.lite.CouchbaseLiteException;
import com.couchbase.lite.DataSource;
import com.couchbase.lite.Database;
import com.couchbase.lite.DatabaseConfiguration;
import com.couchbase.lite.Dictionary;
import com.couchbase.lite.Expression;
import com.couchbase.lite.Meta;
import com.couchbase.lite.MutableDocument;
import com.couchbase.lite.Query;
import com.couchbase.lite.QueryBuilder;
import com.couchbase.lite.Result;
import com.couchbase.lite.ResultSet;
import com.couchbase.lite.SelectResult;

public class Test {
    public static String path = "path";
    public static String tableName="db";
    public static void main(String[] args) throws CouchbaseLiteException {
        // TODO Auto-generated method stub

        // 初始化 CouchbaseLite 模块？CouchbaseLite.init();
        // 配置对象实例？DatabaseConfiguration config = new DatabaseConfiguration();
                // 设置 db 文件门路
        config.setDirectory(path);
        try {//query(config);
            testDelete(config);
        } catch (CouchbaseLiteException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();}
        
    
        
    

    }
    
    public void read(DatabaseConfiguration config) {for(int i=1;i<10;i++) {new Thread(()->{
                try {query(config);
                } catch (CouchbaseLiteException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();}
            }).start();}
    }
    
    // 关上保留
    public static void testAdd(DatabaseConfiguration config) throws CouchbaseLiteException {

        Database database = null;
        try {database = new Database(tableName, config);

            MutableDocument doc = new MutableDocument().setString("sad", "dsf").setString("aa", "bb")
                    .setValue("date_test", LocalDate.now().toString());
            database.save(doc);

            System.out.println("id:" + doc.getId());

        } catch (CouchbaseLiteException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();}
    }
    
    public static void testDelete(DatabaseConfiguration config) throws CouchbaseLiteException {

        Database database = null;
        try {database = new Database(tableName, config);

            Query query = QueryBuilder
                    
                    .select(SelectResult.all(),
                            SelectResult.expression(Meta.id)
                            ).
                    from(DataSource.database(database)).limit(Expression.intValue(1));
            ResultSet rs=query.execute();
            
            Result r=rs.next();
            if(r!=null) {String id=r.getString("id") ;
                   System.out.println("id:"+id);
                    Dictionary dict = r.getDictionary(0);
                    for (String key : dict.getKeys()) {System.out.println(key + "=" + dict.getValue(key));

                    }
                    
                    
                    
                    // 以下代码运行会抛出异样
                    //database.delete(new MutableDocument().setString("id", id));
                    
                    // 删除一个汇合表
                    //database.delete();}
            
            

            //System.out.println("id:" + doc.getId());

        } catch (CouchbaseLiteException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();}
    }
    


    public static void query(Database database) throws CouchbaseLiteException {Query query = QueryBuilder.select(SelectResult.all()).from(DataSource.database(database));
        for (Result r : query.execute()) {System.out.println("\ncount:" + r.count());
            Dictionary dict = r.getDictionary(0);

            for (String key : dict.getKeys()) {System.out.println(key + "=" + dict.getValue(key));

            }
        }
    }
    
    public static void query(DatabaseConfiguration config) throws CouchbaseLiteException {
        Database database = null;
        database = new Database(tableName, config);
        Query query = QueryBuilder
                
                .select(SelectResult.all(),
                        SelectResult.expression(Meta.id).as("id")
                        ).
                from(DataSource.database(database));
        for (Result r : query.execute().allResults()) {System.out.println("id"+":"+r.getString("id") );
            Dictionary dict = r.getDictionary(0);
            if(dict!=null)
            for (String key : dict.getKeys()) {System.out.println(key + "=" + dict.getValue(key));

            }
            System.out.println();}
    }

}

它的 delete 办法的 api 在非挪动设施上应用是有问题的，我感觉是偏差于挪动设施，无奈纯 id 删除内容。也可能是我没找到办法，如果有晓得的，在这里说以下