dao

public class Dao { //写数据库记得在清单文件中写读写权限 private final OpenHelper helper; private final SQLiteDatabase database; public Dao(Context context){ helper = new OpenHelper(context); database = helper.getWritableDatabase(); } public long add(Bean.DataBean bean){ ContentValues values = new ContentValues(); values.put("news_id",bean.getNews_id()); values.put("news_title",bean.getNews_title()); values.put("news_summary",bean.getNews_summary()); values.put("pic_url",bean.getPic_url()); long insert = database.insert("user", null, values); return insert; } //查询 public List<Bean.DataBean> queryAll(){ Cursor

I have a newly coded GWT/GAE app that uses RequestFactory and Editors on the client and a custom Objectify DAO Service on the back. The flush() then persist() paths work fine on success. Client side JSR 303 works as well as can be expected too. My question is how to trigger server warnings/errors and handle UI updates? I am using Chandler's Generic DAO for Objectify 2 at http://turbomanage.wordpress.com/2010/02/09/generic-dao-for-objectify-2/ my gwt activity is calling persist( myProxy ).fire( new Receiver<> ) my dao code is throwing IllegalArgumentException and other RuntimeExceptions for

#!/usr/bin/env python # -*-coding:utf-8 -*- # # 无法执行多个query，self.conn.close()放在CdbConn类的单独函数中，每次query之后要手动close；否则多次query，会自动关闭 import pymysql class CdbConn (): def __init__ ( self , db_host , db_user , db_pwd , db_name , db_port = 3306 ): self . db_host = db_host self . db_port = db_port self . db_user = db_user self . db_pwd = db_pwd self . db_name = db_name self . status = True self . conn = self . getConnection () def getConnection ( self ): try : conn = pymysql . Connect ( host = self . db_host , # 设置MYSQL地址 port = int ( self . db_port ), # 设置端口号 user = self . db_user , # 设置用户名 passwd =

I am writting web in Spring MVC. I wrote all DAOs using Generic DAO. Now I would like to rewrite my Service classes. How can I write "Generic Service"? There are my DAOs: /* ################################# DAO ################################ */ package net.example.com.dao; import java.util.List; public interface GenericDao<T> { public T findById(int id); public List<T> findAll(); public void update(T entity); public void save(T entity); public void delete(T entity); } /* ------------------------------------------------------ */ package net.example.com.dao; import java.io.Serializable;

I'm searching for free and simple DAO generator for java (it needs to create entities/bens from db tables/views and generate basic CRUD code). Currently, I`m using DAO4J which lacks some functionality like views mapping. I know that there are frameworks like Hibernate but I dont need such robust framework. Some things this framework should have to do: Generate CRUD operations with standard SQL queries and not compile-time typesafe queries Doesn't have session concept like hibernate Will not automatically close connection JDBC Connection can be configured through code None of these are perfect

While working on hibernate we are following generic Hibernate DAO pattern as mentioned in Hibernate Doc also. So as per this we are currently maintaining two parallel hirarchies 1) for interfaces 2) for Implimentation so if we work on this the way even if there is no proposed new method beside standard persistannce methods we need to create a marker interface for that entiry as well its Implimentation. Though there seems no problem in this approach and its clear seperation. my question is if there any better way/alternate way to achieve this Thanks in advance Arthur Ronald Umesh I will show

I read spring docs on this subject several times, but some things are still unclear to me. Documentation states: If you want to inject (for example) an HTTP request scoped bean into another bean, you must inject an AOP proxy in place of the scoped bean. That is, you need to inject a proxy object that exposes the same public interface as the scoped object but that can also retrieve the real, target object from the relevant scope (for example, an HTTP request) and delegate method calls onto the real object. Config example is as follows: <bean id="userPreferences" class="com.foo.UserPreferences"

I've started to discovered Mockito library and there is a question for which I didn't find the proper answer. If I have for example such method in my UserDAO class that saves user in database: public class UserDAO{ ... public void create(User user) { Connection connection = null; PreparedStatement pstmt = null; ResultSet generatedKeys = null; try { connection = getConnection(); pstmt = connection.prepareStatement(INSERT_USER, PreparedStatement.RETURN_GENERATED_KEYS); int counter = 1; pstmt.setString(counter++, user.getFirstName()); pstmt.setString(counter++, user.getLastName()); pstmt