将jsp与mongoDB连接的问题

Question

执行时此代码提供异常消息，但在java中运行时相同的代码正常工作，没有任何错误和异常。

以下代码在java中编写并且正常工作但是相同的逻辑在jsp中不起作用。

import com.mongodb.*;
import com.mongodb.client.MongoDatabase;
import com.mongodb.client.MongoCollection;
import org.bson.Document;
import java.util.*;
import com.mongodb.client.MongoCursor;
import static com.mongodb.client.model.Filters.*;
import com.mongodb.client.result.DeleteResult;
import static com.mongodb.client.model.Updates.*;
import com.mongodb.client.result.UpdateResult;
import org.json.JSONObject;

public class TestMongo {
    public static void main(String[] args) {
        String name = "Ram";
        long ph = 7077330520L;
        String email = "DB@gmail.com";
        String password = "qwerty";
        String city = "BBSR";

        MongoClient mongoClient = new MongoClient("localhost", 27017);
        MongoDatabase database = mongoClient.getDatabase("test");

        MongoCollection<Document> collection = database.getCollection("user");
        collection.drop();
        Document doc = new Document("name", name)
                .append("ph", ph)
                .append("email", email)
                .append("password",password)
                .append("city", city);

        collection.insertOne(doc);

        MongoCursor<Document> cursor = collection.find().iterator();

        while (cursor.hasNext()) {
            //if (cursor.next().getInteger("age") == 20)
                System.out.println(cursor.next());
        }
    }
}

[![<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<%@ page import ="java.util.List" %>
<%@ page import ="java.util.Set" %>
<%@ page import="com.mongodb.*" %>
<%@ page import="com.mongodb.client.MongoDatabase" %>
<%@ page import="org.bson.Document" %>
<%@ page import="com.mongodb.client.MongoCollection" %>

<%
    String name = "Ram";
    long ph = 7077330520L;
    String email = "DB@gmail.com";
    String password = "qwerty";
    String city = "BBSR";

    MongoClient mongoClient = new MongoClient("localhost", 27017);
    MongoDatabase database = mongoClient.getDatabase("test");

    MongoCollection<Document> collection = database.getCollection("user");
    collection.drop();
    Document doc = new Document("name", name)
            .append("ph", ph)
            .append("email", email)
            .append("password",password)
            .append("city", city);

    collection.insertOne(doc);
%>][1]][1]

Answer 1

    With mongo-java-driver-2.10.1.jar present in your build path surely below code works

    <%@ page contentType="text/html;charset=UTF-8" language="java" %>
    <%@ page import ="java.util.List" %>
    <%@ page import ="java.util.Set" %>
    <%@ page import="com.mongodb.*" %>
    <%@ page import="com.mongodb.DB" %>
    <%@ page import="org.json.JSONObject" %>
    <%@ page import="com.mongodb.DBCollection" %>


    <%
        String name = "Ram";
        long ph = 7077330520L;
        String email = "DB@gmail.com";
        String password = "qwerty";
        String city = "BBSR";

        MongoClient mongoClient = new MongoClient("localhost", 27017);
        DB database = mongoClient.getDB("test");

        DBCollection collection = database.getCollection("user");
        //collection.drop();
        BasicDBObject document = new BasicDBObject();
        document.put("name", name);
        document.put("ph", ph);
        document.put("email", email);
        document.put("password",password);
        document.put("city", city);

        collection.insert(document);
    %>
After inserting I have tested as well 
> db.user.find().pretty()
{
        "_id" : ObjectId("59549f53a5653b5b4303004f"),
        "name" : "Ram",
        "ph" : NumberLong("7077330520"),
        "email" : "DB@gmail.com",
        "password" : "qwerty",
        "city" : "BBSR"
}
{
        "_id" : ObjectId("59549fbda5653b5b43030050"),
        "name" : "Ram",
        "ph" : NumberLong("7077330520"),
        "email" : "DB@gmail.com",
        "password" : "qwerty",
        "city" : "BBSR"
}
{
        "_id" : ObjectId("59549feaa5653b5b43030051"),
        "name" : "Ram",
        "ph" : NumberLong("7077330520"),
        "email" : "DB@gmail.com",
        "password" : "qwerty",
        "city" : "BBSR"
}
>  As I executed many times, number of rows inserted 3 times.

Answer 2

如果你真的想要使用新的驱动程序，你需要在构建路径中使用它，首先必须删除所有编译错误。编译错误标记为红色，可以从eclipse编辑器中轻松找到