Spring MVC series: (0) struts2

1, How to use Struts2?

Steps :

(1) Introduction of JAR Package

(2) configuration: Web. XML and Struts.xml configuration

(3) Write code and Configuration:

Custom Helloworldaction class (inherited from Actionsupport)

Registering the helloworldaction in Struts-web.xml

(1) Introduction of JAR Package

Reference: http://lsieun.blog.51cto.com/9210464/1791218 2.1. Introduction of JAR Package

(2) configuration: Web. XML and Struts.xml configuration

Xml

<?xml version= "1.0"  encoding= "UTF-8"? ><web-app xmlns:xsi= "http://www.w3.org/2001/ Xmlschema-instance " xmlns=" Http://java.sun.com/xml/ns/javaee " xsi:schemalocation="/http/ Java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd " id=" WebApp_ID "  version= "2.5" >  <display-name>springMVC-struts2</display-name>  < welcome-file-list>    <welcome-file>index.jsp</welcome-file>   </welcome-file-list>  <filter>  <filter-name>struts2</filter-name>   <filter-class>org.apache.struts2.dispatcher.ng.filter.strutsprepareandexecutefilter</ Filter-class>  </filter>  <filter-mapping>  <filter-name> struts2</filter-name>  <url-pattern>*.action</url-pattern>  </ Filter-mapping></web-app>

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Struts.xml

<?xml version= "1.0" encoding= "UTF-8"? ><! DOCTYPE struts public "-//apache software foundation//dtd struts Configuration 2.3//en" "http://struts.apache.org/dtds/ STRUTS-2.3.DTD "><struts> <constant name=" struts.enable.DynamicMethodInvocation "value=" false "/> < ; constant name= "struts.devmode" value= "true"/><include file= "com/rk/web/struts-web.xml" ></include> </struts>

(3) Write code and Configuration :

Custom Helloworldaction class (inherited from Actionsupport)

Helloworld.java

Package Com.rk.web;import Java.util.date;import Com.opensymphony.xwork2.action;import Com.opensymphony.xwork2.actionsupport;import Com.rk.entity.emp;import Com.rk.entity.jsonresult;public Class Helloworldaction extends Actionsupport {@Overridepublic String execute () throws Exception {return action.success;}}

Registering the helloworldaction in Struts.xml

Struts-web.xml

<?xml version= "1.0" encoding= "UTF-8"? ><! DOCTYPE struts public "-//apache software foundation//dtd struts Configuration 2.3//en" "http://struts.apache.org/dtds/  STRUTS-2.3.DTD "><struts> <package name=" myweb "namespace="/"extends=" struts-default "> <action Name= "hello_*" class= "com.rk.web.HelloWorldAction" method= "{1}" > <result name= "success" >/success.jsp& Lt;/result> </action> </package></struts>

2. How do I return json?

Steps:

(1) introduction of Struts2-json-plugin-2.3.29.jar

(2) <package> inherit from Json-default package;<result> The type value is Json.

(1) introduction of Struts2-json-plugin-2.3.29.jar

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(2) <package> inherit from Json-default package;<result> The type value is Json.

Helloworld.java

Package Com.rk.web;import Java.util.date;import Com.opensymphony.xwork2.action;import Com.opensymphony.xwork2.actionsupport;import Com.rk.entity.emp;public class Helloworldaction extends ActionSupport { Private emp emp; @Overridepublic String execute () throws Exception {return action.success;} Public String test () throws exception{emp = new emp ("abc", "lucy", and new Date ()); return "toJson";} Public emp getemp () {return emp;}}

Struts-web.xml

<?xml version= "1.0"  encoding= "UTF-8"  ?><! Doctype struts public "-//apache software foundation//dtd struts configuration  2.3//en "http://struts.apache.org/dtds/struts-2.3.dtd" ><struts>    < Package name= "myweb"  namespace= "/"  extends= "json-default" >         <action name= "hello_*"  class= "com.rk.web.HelloWorldAction"  method= "{1}" >            <result name= "success" > /success.jsp</result>            <result  name= "toJson"  type= "json" >             <param name= "root" >emp</param>             </result>       &nBsp;</action>    </package></struts> 

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3, how to deal with the date, Chinese (code)?

String date input: struts has a parameters interceptor, andThe parameters interceptor provides built-in type conversions that can convert strings to date types (see: http://lsieun.blog.51cto.com/ 9210464/1791975).

Date type output is string: when you output a date to a page, you can use the <s:date> tag of Struts. (reference: HTTPS://STRUTS.APACHE.ORG/DOCS/DATE.HTML)

<s:date name= "emp.birthday" format= "yyyy-mm-dd"/>

For input chinese, struts defaults to encoding the request without special handling, as long as it is a post request, Chinese does not appear garbled. (reference: http://blog.csdn.net/techbirds_bao/article/details/8233156)

4, how to integrate with spring?

(1) introduction of spring-core, Spring-web jar packages and struts and spring-integrated jar packages

(2) Configuring Web. XML and Applicationcontext.xml

(3) the object to be created is to be created by the spring IOC

(1) Introduction of JAR Package

Spring-core	Commons-logging-1.2.jar Spring-beans-3.2.5.release.jar Spring-context-3.2.5.release.jar Spring-core-3.2.5.release.jar Spring-expression-3.2.5.release.jar
Spring-web	Spring-web-3.2.5.release.jar
Struts and spring-integrated jar packages	Struts2-spring-plugin-2.3.29.jar

(2) Configuring Web. XML and Applicationcontext.xml

Xml

<?xml version= "1.0"  encoding= "UTF-8"? ><web-app xmlns:xsi= "http://www.w3.org/2001/ Xmlschema-instance " xmlns=" Http://java.sun.com/xml/ns/javaee " xsi:schemalocation="/http/ Java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd " id=" WebApp_ID "  version= "2.5" >  <display-name>springMVC-struts2</display-name>  < welcome-file-list>    <welcome-file>index.jsp</welcome-file>   </welcome-file-list>  <!-- 1. struts2  Configuration  -->  <filter >  <filter-name>struts2</filter-name>  <filter-class> org.apache.struts2.dispatcher.ng.filter.strutsprepareandexecutefilter</filter-class>  </ filter>  <filter-mapping>  <filter-name>struts2</filter-name>   <url-pattern>*.action</url-pattern>  </filter-mapping>     <!-- 2. spring  Configuration  -->  <context-param><param-name>contextconfiglocation</param-name><param-value>classpath: applicationcontext.xml</param-value></context-param>  <listener>  < Display-name>spring</display-name>  <listener-class> org.springframework.web.context.contextloaderlistener</listener-class>  </listener></ Web-app>

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" xsi:schemalocation= "http://www.springframework.org/schema/beans Http://www.springframework.org/schema/beans/spring-beans.xsd "><import resource=" Com/rk/web/spring-web.xml "/></beans>

(3) the object to be created is to be created by the spring IOC

Spring-web.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" xsi:schemalocation= "http://www.springframework.org/schema/beans Http://www.springframework.org/schema/beans/spring-beans.xsd "><bean id=" Helloword "class=" Com.rk.web.HelloWorldAction "scope=" prototype "></bean></beans>

Struts-web.xml using HelloWorld registered in spring

<?xml version= "1.0"  encoding= "UTF-8"  ?><! Doctype struts public "-//apache software foundation//dtd struts configuration  2.3//en "http://struts.apache.org/dtds/struts-2.3.dtd" ><struts>    < Package name= "myweb"  namespace= "/"  extends= "json-default" >         <action name= "hello_*"  class= "helloword"  method= "{1}" >             <result name= "success" >/success.jsp< /result>            <result name= " ToJson " type=" JSON ">            <param  name= "root" >emp</param>             </result>        </action>    </package></struts> 

5, two important configuration files

Two important documents under the Struts2-core-2.3.29.jar

/struts-default.xml(defines the Struts-default package and a series of Interceptors)

/org/apache/struts2/default.properties (defines The properties that need to be configured in Struts)

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6. Struts2 and Spring introduce other file methods

Struts2

<include file= "com/rk/web/struts-web.xml" ></include>

Spring

<import resource= "com/rk/web/spring-web.xml"/>

Spring MVC series: (0) struts2