Java Combat (vii)--------MYECLIPSE build Spring's development environment Spring Framework Configuration

To develop a feature based on spring, you need to add the development support environment for spring. The so-called spring support environment is to add the jar, TLD, and XML files needed for spring in a Java Web application, and with these files we can develop the spring-related functional code.

This article has two content:

1.Spring Environment Construction

Sample----test using 2.Spring

1.Spring Environment Construction

The build steps are as follows:

Right-select MyEclipse-----ADD Spring capabilities for project projects

A

You can select the appropriate class library

And the configuration of the path

When the configuration is complete, click the Finish button to complete the add to the spring support environment.

Sample----test using 2.Spring

2.1 Adding bean Configuration to Applicationcontext.xml


First, add the bean configuration element in Applicationcontext.xml, as shown in program 2.1.


Program 2.1 Applicationcontext.xml

<?xml version= "1.0" encoding= "UTF-8"?> <beans xmlns=
	"http://www.springframework.org/schema/" Beans "
	xmlns:xsi=" http://www.w3.org/2001/XMLSchema-instance "
	xmlns:p=" http://www.springframework.org/ schema/p "
	xsi:schemalocation=" Http://www.springframework.org/schema/beans http://www.springframework.org/ Schema/beans/spring-beans-3.0.xsd ">


<bean id=" HelloWorld "class=" Test.helloworld ">
<property Name= "message" >
<value>World</value>
</property>
</bean>

Here we have a Bean object with the id "HelloWorld", the class used is Test.helloworld, and an injected value "world" is set for the class's property "message". This is one of the most commonly used configuration forms for <bean> elements.

2.2 New Bean Class--helloworld.java


New Bean class Test.HelloWorld.java below. Depending on the XML file configuration above, the class needs to include a property message, so add a variable message of type string and add the Getter/setter function, then add a test function execute () To output the injected parameter variable message, as shown in program 2.2.


Program 2.2 Helloworld.java

Package Test;


public class HelloWorld {


	    protected String message;
	    Public String GetMessage () {return message
	;
	}
	    public void Setmessage (String message) {
	this.message = message;
	}
	    public void Execute () {
	System.out.println ("Hello" + getMessage () + "!");
	}
	

2.3 Run test class Test.java

Then, write the test class Test.java. Using Filesystemxmlapplicationcontext to read the XML configuration file ApplicationContext, the variable ctx of the ApplicationContext type is returned. The Getbean () function of CTX is then used to obtain the configured Bean object "HelloWorld", which is the name of the bean configured in the XML file. The object that is obtained is forced type conversion into the HelloWorld type, named Hello, and calls execute () of hello to perform the output. The complete code for implementation is shown in program 2.3.



Program 2.3 Test Class Test.java

Package Test;


Import Org.springframework.context.ApplicationContext;
Import Org.springframework.context.support.FileSystemXmlApplicationContext;


public class Springtest {public
	static void Main (string[] args) {
		ApplicationContext ctx = new Filesystemxmlappli Cationcontext (
		"Src/applicationcontext.xml");
		HelloWorld Hello = (HelloWorld) ctx.getbean ("HelloWorld");
		
		Hello.execute ();
		}

Running the program, if the output "Hello world" indicates that the environment already supports spring.

If a "Java.io.filenotfoundexception:webroot/web-inf/applicationcontext.xml" exception occurs, Indicates that the Applicationcontext.xml resource file is placed in a wrong path, which needs to be the path relative to the current project demo.