Convert a Result Set from SQL Array to Array of Strings

I am querying the information_schema.columns table in my PostgreSQL database. Using a table name, the result set finds all the column names, type, and whether it is nullable (except for the primary key, 'id'). This is the query being used: SELECT column_name, is_nullable,data_type FROM information_schema.columns WHERE lower(table_name) = lower('TABLE1') AND column_name != 'id' ORDER BY

将结果集从SQL数组转换为字符串数组

我正在查询PostgreSQL数据库中的information_schema.columns表。 使用表名称,结果集会查找所有列名称,类型以及是否为空(除了主键'id')。 这是使用的查询: SELECT column_name, is_nullable,data_type FROM information_schema.columns WHERE lower(table_name) = lower('TABLE1') AND column_name != 'id' ORDER BY ordinal_position; 我有这些结果的每个字符串数组,我试图使用ResultSet方法getArray(String c

Accessing stored procedure's multiple result sets in Apache Camel

I am building a proof of concept for using Apache Camel. I am trying to build a route that will call the stored procedure on a Sybase DB using JDBC component and then process its multiple results sets. So far, I have the following configuration using Spring: <camelContext id="context"> <route> <from uri="direct:start"/> <bean ref="sqlStatementCreator"/

在Apache Camel中访问存储过程的多个结果集

我正在构建使用Apache Camel的概念证明。 我正在尝试构建一个路由,它将使用JDBC组件调用Sybase DB上的存储过程,然后处理其多个结果集。 到目前为止,我使用Spring进行了以下配置: <camelContext id="context"> <route> <from uri="direct:start"/> <bean ref="sqlStatementCreator"/> <to uri="jdbc:dataSource?resetAutoCommit=false"/> <bean ref

Check in JDBC that a request execute correctly

I am trying to execute dynamic SQL in a Servlet using JDBC, I need to check either the user request was executed correctly or not. I am ussing the Execute command wich return a boolean: TRUE indicates the result is a ResultSet and FALSE indicates it has the int value which denotes number of rows affected by the query. And this method throws SQLException - if a database access error occurs. S

在JDBC中检查请求是否正确执行

我试图在使用JDBC的Servlet中执行动态SQL,我需要检查用户请求是否正确执行。 我使用Execute命令返回一个布尔值:TRUE表示结果是ResultSet,FALSE表示它有int值,表示查询所影响的行数。 此方法抛出SQLException - 如果发生数据库访问错误。 所以我没有任何意思告诉用户他的请求是否正确执行(因为语法错误) 如果发生数据库错误,您将得到一个SQLException。 如果没有数据库错误,但结果对于您的应用程序仍然“错误”,

Case sensitive order using Java Collator

I am trying to understand how case sensitive order should really work using Java Collator. In this example following strings are sorted in French locale using all strengths (I have added a few extra strings to the data set for illustrative purposes): [Äbc, äbc, Àbc, àbc, Abc, abc, ABC] - Original Data [Äbc, äbc, Àbc, àbc, Abc, abc, ABC] Primary [Abc, abc, ABC, Àbc, àbc, Äbc, äbc] Secondary [ab

使用Java Collat​​or的区分大小写的顺序

我正在尝试使用Java Collat​​or来了解区分大小写的顺序应该如何工作。 在这个例子中,下面的字符串使用所有强度在法语语言环境中进行排序(为了说明的目的,我在数据集中添加了一些额外的字符串): [Äbc, äbc, Àbc, àbc, Abc, abc, ABC] - Original Data [Äbc, äbc, Àbc, àbc, Abc, abc, ABC] Primary [Abc, abc, ABC, Àbc, àbc, Äbc, äbc] Secondary [abc, Abc, ABC, àbc, Àbc, äbc, Äbc] Tertiary Case kicks in only with

Maven not showing up in Eclipse (Kepler) even after m2e install

I've seen that others have had this problem where Maven doesn't show up for them in Eclipse after installing the m2e plugin, but most of the solutions seem to suggest doing something like "Configure>Convert to Maven." But Maven is not showing up for me in the Configure list, nor is it showing up in Console>Open Console or the File>New list. I see some solutions refer

甚至在m2e安装之后,Maven也没有在Eclipse(Kepler)中出现

我已经看到其他人在安装m2e插件后Maven没有在Eclipse中为他们显示这个问题,但大多数解决方案似乎都建议做类似“Configure> Convert to Maven”的操作。 但Maven在配置列表中没有显示给我,也没有在控制台>打开控制台或文件>新建列表中显示。 我看到一些解决方案涉及到编辑项目的类路径,但我不清楚如何做到这一点。 我试图通过一本关于Java EE7的书开始工作,并且它在示例中使用了Maven。 有人可以帮忙吗? 检查工

Use of =+ operator in Java?

This question already has an answer here: What is the difference between += and =+? 8 answers What is the purpose of the =+ operator in Java? [duplicate] 2 answers int i =+ 2; It is positive 2(+2) assignment to variable i. It is more miningful or understandable if your write like -- int i = +2; One more example - int i = 2; i=+3; System.out.println(i); It prints 3. + Unary plus ope

在Java中使用= +运算符?

这个问题在这里已经有了答案: + =和= +之间有什么区别? 8个答案 Java中的= +运算符的用途是什么? [重复] 2个答案 int i =+ 2; 对变量i赋值2(+2)是正值。 如果你的写法像 - int i = +2; 再举一个例子 - int i = 2; i=+3; System.out.println(i); 它打印3。 +一元加运营商; 表示正值(但没有这个数字是正数) 更多示例 - http://docs.oracle.com/javase/tutorial/displayCode.html?code=http://docs.orac

What's the point of the compound comparison operators?

I have read that b1 |= b2 is the shortcut equivalent to b1 = b1 | b2 b1 = b1 | b2 . My question is really two-fold: Isn't "=" an assignment operator rather than a comparison operator? If so, what does it do in this context? Or, is it a comparison operator here and what scenario exists where you would need to compare a variable to itself (ie b1 = b1 )? (I realize this is pro

复合比较运算符有什么意义?

我读过b1 |= b2是相当于b1 = b1 | b2的捷径 b1 = b1 | b2 。 我的问题实际上是双重的: 不是“=”是赋值运算符而不是比较运算符吗? 如果是这样,它在这方面做了什么? 或者,它是一个比较运算符,哪里需要将变量与自身进行比较(即b1 = b1 )? (我意识到这可能是要问的新手问题,但我只有非正式的经验,编写bash脚本,没有编程方面的教育背景,请善待;) 注意:这里引用了这个问题:Java中的快捷方式“or-assignment”

How to make an addAll() or addRange() method from scratch in java?

I'm trying to do a linkedlist for an assigment i have, this ask explicitly to create, from scratch a linkedlist and some derivated types like a queue and a stack, this is just some college homework, and i realize how to make a node class and a linkedlist class, but i'm struggling to create the addAll() method in this linkedlist class, this is what i have. if i must bet, i say is the Col

如何在java中从头开始创建addAll()或addRange()方法?

我正在尝试做一个链接列表,我明确要求创建一个链接列表和一些派生类型,比如队列和堆栈,这只是一些大学作业,而且我意识到如何创建一个节点类和链表类,但我努力在这个链表类中创建addAll()方法,这就是我所拥有的。 如果我必须打赌,我说是收藏c一个,但是,然后,我试图添加的东西列表,为了将他的内容传递到新列表,obiusly没有准备好,并且obiusly不起作用。 你能告诉我如何通过某种“原始列表”以便将它们的数据传递

extra storage merge sort

I need make a merge sort using an additional array. Here is my code: public class extra_storage{ public static void main(String[]args) { int x[]=new int[]{12,9,4,99,120,1,3,10}; int a[]=new int[x.length]; mergesort(x,0,x.length-1,a); for (int i=0;i<x.length;i++){ System.out.println(x[i]); } } public static void merg

额外的存储合并排序

我需要使用附加数组进行合并排序。 这是我的代码: public class extra_storage{ public static void main(String[]args) { int x[]=new int[]{12,9,4,99,120,1,3,10}; int a[]=new int[x.length]; mergesort(x,0,x.length-1,a); for (int i=0;i<x.length;i++){ System.out.println(x[i]); } } public static void mergesort(int x[],int low

Why &= operator doesn't work the same as &&

I'm just curious how java works. Can someone explain why getBoolean is called in Case 1 and not called in Case 2? public class Main { public static void main(String[] args) { System.out.println("---------- Case 1 ----------"); boolean b = false; b &= getBoolean(true); System.out.println("---------- Case 2 ----------"); b = false; b =

为什么&=操作符与&&不一样

我只是好奇java是如何工作的。 有人可以解释为什么在案例1中调用getBoolean而在案例2中不调用? public class Main { public static void main(String[] args) { System.out.println("---------- Case 1 ----------"); boolean b = false; b &= getBoolean(true); System.out.println("---------- Case 2 ----------"); b = false; b = b && getBoolean(tru