spring原理案例-基本項目搭建 03 創建工程運行測試 spring ioc原理實例示例

本文轉載自查看原文 2016-02-24 15:50 1907 spring/ springmvc mybatis整合完整示例

下面開始項目的搭建

使用 Java EE - Eclipse 新建一 Dynamic Web Project

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

點擊 Next > 按鈕。

默認的 Source folders 配置如下：

ps:可以根據需求自己編輯比如

刪除默認的，增加以下四個並修改默認的輸出目錄為 WebContent\WEB-INF\classes:

src/main/java

src/main/resources

src/test/java

src/test/resources

點擊Next

Configure web module settings 對話框勾選 Generate web.xml deployment descriptor 選項：

然后點擊finish完成

這幾個包或許是需要最少的包

-------------------------------------------------------

3.下面開始部署

把所需要的jar包ctrl c ctrl v粘貼到lib目錄

然后添加進來

添加完的效果

然后新建兩個類

一個實體類-----------------HelloWorldSpringBean

一個測試類(包含main函數)----------HelloWorldSpring

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

具體如下:

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());

    }

}

一個屬性,

以及對應的get set方法

還有執行方法

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>

<bean id="myHelloWorld" class="chapter2.HelloWorldSpring">

<property name="hello">

<value>hello World spring!</value>

</property>

</bean>

</beans>

HelloWorldSpring直接run as application 執行,報錯

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; 不允許有匹配 "[xX][mM][lL]" 的處理指令目標。

配置文件開頭不能有其他內容空格或者空行等,如果有的話就會報錯

XML沒有以<?xml version="1.0" encoding="UTF-8"?> 開頭，也就是說第一個字符必須是<?xml......

解決方法：

規范的XML格式、

<?xml version="1.0" encoding="UTF-8"?> 必須是XML文件的第一個元素且前面不能空格。

修改后繼續報錯,錯誤內容為

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

類找不到,發現是配置文件中的class中寫錯了,沒有寫好類名

class="chapter2.HelloWorldSpring.HelloWorldSpringBean">修改為這個重新運行,可以打開

最終的代碼為:

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());

    }

}

---------------------------------------------------------

package chapter2.HelloWorldSpring;

import org.springframework.context.ApplicationContext;

import org.springframework.context.support.FileSystemXmlApplicationContext;

import chapter2.HelloWorldSpring.HelloWorldSpringBean;

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();

    }

}

-----------------------------------------------------------------------------------

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

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

<beans>

<bean id="myHelloWorld" class="chapter2.HelloWorldSpring.HelloWorldSpringBean">

<property name="hello">

<value>hello World spring!</value>

</property>

</bean>

</beans>