eclipse Spring - 属性“name”不允许出现在元素“constructor-arg”中
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Spring - Attribute 'name' is not allowed to appear in element 'constructor-arg'
提问by maximus
I am using hsqldb as a db in my program. I want to inject the constructor values over spring.
我在我的程序中使用 hsqldb 作为数据库。我想在 spring 上注入构造函数值。
Here is my bean:
这是我的豆子：
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans.xsd">
<bean id="ConnectionManager" class="at.tuwien.group2.vpm.persistence.ConnectionManager"
scope="singleton">
<constructor-arg name="url" value="jdbc:hsqldb:file:vpmDatabasetest" />
<constructor-arg name="user" value="sa" />
<constructor-arg name="password" value="" />
</bean>
My Constructor looks like that:
我的构造函数看起来像这样：
public ConnectionManager(String url, String user, String password) {
if(url == null || user == null || password == null) {
throw new NullPointerException("Paramaeter cannot be null!");
}
this.url = url;
this.user = user;
this.password = password;
}
However, when I want to execute the code I get:
但是，当我想执行代码时，我得到：
Attribute 'name' is not allowed to appear in element 'constructor-arg'
属性 'name' 不允许出现在元素 'constructor-arg' 中
Attribute 'name' is not allowed to appear in element 'constructor-arg'
属性 'name' 不允许出现在元素 'constructor-arg' 中
What should I use instead?
我应该用什么代替？
采纳答案by u290629
I guess you are using Sping 2.x. Use the indexattribute to specify explicitly the index of constructor arguments：
我猜你正在使用 Sping 2.x。使用index属性明确指定构造函数参数的索引：
<bean id="ConnectionManager" ...>
<constructor-arg index="0" value="jdbc:hsqldb:file:vpmDatabasetest" />
<constructor-arg index="1" value="sa" />
<constructor-arg index="2" value="" />
</bean>
Moreover, as of Spring 3.0you can also use the constructor parameter name for value disambiguation.
此外，从Spring 3.0 开始，您还可以使用构造函数参数名称进行值消歧。
回答by Mayoares
I had same problem using Spring 3.1.2 libraries. My mistake was that I used old schema location. When I changed from
我在使用 Spring 3.1.2 库时遇到了同样的问题。我的错误是我使用了旧的架构位置。当我从
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-2.0.xsd
http://www.springframework.org/schema/aop
http://www.springframework.org/schema/aop/spring-aop-2.0.xsd"
to
到
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-3.1.xsd
http://www.springframework.org/schema/aop
http://www.springframework.org/schema/aop/spring-aop-3.1.xsd"
it worked fine to use named instead of indexed constructor-args.
使用命名而不是索引构造函数参数效果很好。
回答by Evgeniy Dorofeev
Simply remove the name attribute
只需删除 name 属性
<bean id="ConnectionManager" class="at.tuwien.group2.vpm.persistence.ConnectionManager"
scope="singleton">
<constructor-arg value="jdbc:hsqldb:file:vpmDatabasetest" />
<constructor-arg value="sa" />
<constructor-arg value="" />
</bean>
it will work. And get the latest Spring version, you seem to be using a very old one. Also, I would suggest http://static.springsource.org/spring/docs/3.1.x/spring-framework-reference/html/as the primary source of information about Spring.
它会起作用。并获取最新的 Spring 版本，您似乎在使用一个非常旧的版本。另外，我建议将http://static.springsource.org/spring/docs/3.1.x/spring-framework-reference/html/作为有关 Spring 的主要信息来源。
回答by chenrui
If you use Maven, try to add the newer spring-beans dependency. I fix this issue by updating the jar dependency without updating the xsd version.
如果您使用 Maven，请尝试添加较新的 spring-beans 依赖项。我通过更新 jar 依赖项而不更新 xsd 版本来解决此问题。
