[转]spring原理案例-基本项目搭建创建工程运行测试spring ioc原理实例示例

电玩女神 2022-05-17 11:24 38阅读 0赞

下面开始项目的搭建

使用 Java EE - Eclipse 新建一 Dynamic Web Project

[![7d8decd6-cbab-4618-8fd6-148550868db6][]][7d8decd6-cbab-4618-8fd6-148550868db6 1]

[![b1e45657-a918-49f9-8591-ef4c55fec14e][]][b1e45657-a918-49f9-8591-ef4c55fec14e 1]

Target Runtime 选 Apache Tomcat 7.0(不要选 Apache Tomcat 6.0，7 以后才支持 Servlet 3.0)。

点击 Next > 按钮。

默认的 Source folders 配置如下：

ps:可以根据需求自己编辑比如

删除默认的，增加以下四个并修改默认的输出目录为 WebContent\\WEB-INF\\classes:

src/main/java

src/main/resources

src/test/java

src/test/resources

[![c3c3c5ac-223b-40a6-850c-07947d50fe5c][]][c3c3c5ac-223b-40a6-850c-07947d50fe5c 1]

点击Next

Configure web module settings 对话框勾选 Generate web.xml deployment descriptor 选项：

[![7890f292-047e-451e-8970-fb3e7eedf28d][]][7890f292-047e-451e-8970-fb3e7eedf28d 1]

然后点击finish完成

[![079e6ac5-9993-4fbc-9fde-ee4f7aef6b6f][]][079e6ac5-9993-4fbc-9fde-ee4f7aef6b6f 1]

这几个包或许是需要最少的包

\-------------------------------------------------------

3.下面开始部署

把所需要的jar包ctrl c    ctrl v粘贴到lib目录

然后  添加进来

[![0d26f02e-d14a-4062-a154-da391b62bff4][]][0d26f02e-d14a-4062-a154-da391b62bff4 1]

添加完的效果

[![0aabf9f2-557e-4de0-bf7b-34bbb4023c55][]][0aabf9f2-557e-4de0-bf7b-34bbb4023c55 1]

然后新建两个类

一个实体类-----------------HelloWorldSpringBean

一个测试类(包含main函数)----------HelloWorldSpring

新建配置文件 -----------helloWorldSpring.xml

[![ead0ecdc-c4b4-4c9e-b9fc-4cf4569f04d3][]][ead0ecdc-c4b4-4c9e-b9fc-4cf4569f04d3 1]

具体如下:

HelloWorldSpringBean

package chapter2.HelloWorldSpring;

public class HelloWorldSpringBean \{

private String hello;

public String getHello()\{

return hello;

public void setHello(String hello)\{

this.hello=hello;

public void show()\{

System.out.println("--message--"+getHello());

一个属性,

以及对应的get   set方法

还有执行方法

HelloWorldSpring

package chapter2.HelloWorldSpring;

import org.springframework.context.ApplicationContext;

import org.springframework.context.support.FileSystemXmlApplicationContext;

public class HelloWorldSpring \{

public static void main(String\[\] args) \{

// TODO Auto-generated method stub

ApplicationContext ctx = new FileSystemXmlApplicationContext("src/helloWorldSpring.xml");

HelloWorldSpringBean helloWorldSpringBean = (HelloWorldSpringBean)ctx.getBean("myHelloWorld");

helloWorldSpringBean.show();

helloWorldSpring.xml

<?xml version="1.0" encoding="UTF-8"?>

<!DOCTYPE beans PUBLIC "-//SPRING//DTD BEAN//EN" "http://www.springframework.org/dtd/spring-beans.dtd">

<beans>

<value>hello World spring!</value>

</property>

</bean>

</beans>

HelloWorldSpring直接run as application 执行,报错

Exception in thread "main" org.springframework.beans.factory.xml.XmlBeanDefinitionStoreException: Line 2 in XML document from file [D:\ProgramData\Workspaces\eclipse\chapter2\src\helloWorldSpring.xml] is invalid; nested exception is org.xml.sax.SAXParseException; lineNumber: 2; columnNumber: 6; 不允许有匹配 "[xX][mM][lL]" 的处理指令目标。

**配置文件开头不能有其他内容空格或者空行等,如果有的话就会报错**

XML没有以<?xml version="1.0" encoding="UTF-8"?> 开头，也就是说第一个字符必须是<?xml......

解决方法：

**规范的XML格式、**

**<?xml version="1.0" encoding="UTF-8"?>  必须是XML文件的第一个元素且前面不能空格。**

修改后继续报错,错误内容为

![复制代码][copycode.gif]

十一月 10, 2015 5:50:10 下午 org.springframework.context.support.FileSystemXmlApplicationContext refresh
    
    警告: Exception encountered during context initialization - cancelling refresh attempt
    
    org.springframework.beans.factory.CannotLoadBeanClassException: Cannot find class [chapter2.HelloWorldSpring] for bean with name 'myHelloWorld' defined in file [D:\ProgramData\Workspaces\eclipse\chapter2\src\helloWorldSpring.xml]; nested exception is java.lang.ClassNotFoundException: chapter2.HelloWorldSpring
    
        at org.springframework.beans.factory.support.AbstractBeanFactory.resolveBeanClass(AbstractBeanFactory.java:1351)
    
        at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.determineTargetType(AbstractAutowireCapableBeanFactory.java:628)
    
        at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.predictBeanType(AbstractAutowireCapableBeanFactory.java:597)
    
        at org.springframework.beans.factory.support.AbstractBeanFactory.isFactoryBean(AbstractBeanFactory.java:1444)
    
        at org.springframework.beans.factory.support.AbstractBeanFactory.isFactoryBean(AbstractBeanFactory.java:974)
    
        at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:752)
    
        at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:835)
    
        at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:537)
    
        at org.springframework.context.support.FileSystemXmlApplicationContext.<init>(FileSystemXmlApplicationContext.java:140)
    
        at org.springframework.context.support.FileSystemXmlApplicationContext.<init>(FileSystemXmlApplicationContext.java:84)
    
        at chapter2.HelloWorldSpring.HelloWorldSpring.main(HelloWorldSpring.java:12)
    
    Caused by: java.lang.ClassNotFoundException: chapter2.HelloWorldSpring

![复制代码][copycode.gif]

类找不到,发现是配置文件中的class中写错了,没有写好类名

class="chapter2.HelloWorldSpring.HelloWorldSpringBean">修改为这个重新运行,可以打开

[![2c77a4c7-7071-41db-b38f-a7eb908b1bb1][]][2c77a4c7-7071-41db-b38f-a7eb908b1bb1 1]

最终的代码为:

十一月 10, 2015 5:50:10 下午 org.springframework.context.support.FileSystemXmlApplicationContext refresh

警告: Exception encountered during context initialization - cancelling refresh attempt

org.springframework.beans.factory.CannotLoadBeanClassException: Cannot find class \[chapter2.HelloWorldSpring\] for bean with name 'myHelloWorld' defined in file \[D:\\ProgramData\\Workspaces\\eclipse\\chapter2\\src\\helloWorldSpring.xml\]; nested exception is java.lang.ClassNotFoundException: chapter2.HelloWorldSpring

at org.springframework.beans.factory.support.AbstractBeanFactory.resolveBeanClass(AbstractBeanFactory.java:1351)

at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.determineTargetType(AbstractAutowireCapableBeanFactory.java:628)

at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.predictBeanType(AbstractAutowireCapableBeanFactory.java:597)

at org.springframework.beans.factory.support.AbstractBeanFactory.isFactoryBean(AbstractBeanFactory.java:1444)

at org.springframework.beans.factory.support.AbstractBeanFactory.isFactoryBean(AbstractBeanFactory.java:974)

at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:752)

at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:835)

at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:537)

at org.springframework.context.support.FileSystemXmlApplicationContext.<init>(FileSystemXmlApplicationContext.java:140)

at org.springframework.context.support.FileSystemXmlApplicationContext.<init>(FileSystemXmlApplicationContext.java:84)

at chapter2.HelloWorldSpring.HelloWorldSpring.main(HelloWorldSpring.java:12)

Caused by: java.lang.ClassNotFoundException: chapter2.HelloWorldSpring

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[copycode.gif]: /images/20220517/1a0cbc986c8247fba59db81ba2541c4e.png
[2c77a4c7-7071-41db-b38f-a7eb908b1bb1]: /images/20220517/5ea07d7138894281a8c2ca484e3425e6.png
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