One: Create a Web project
Second: Write the login program
<body>
<!--"/loginstruts/login.do" project name plus configured resource Name--
<form action= "/loginstruts/login.do" method= "POST" >
u:<input type= "text" name= "username" ><br/>
p:<input type= "password" name= "password" ><br/>
<input type= "Submit" value= "Login" >
</form>
</body>
Three: Writing UserForm
public class UserForm extends actionform{
Private Stringusername;
Private Stringpassword;
Public String GetUserName () {
return username;
}
public void Setusername (String username) {
This.username = Username;
}
Public String GetPassword () {
return password;
}
public void SetPassword (String password) {
This.password = password;
}
}
Note: The wording here is consistent.
Four: Write action
public class Loginaction extends Action {
@Override
Public Actionforward Execute (actionmapping mapping, Actionform form,
HttpServletRequest request, HttpServletResponse response)
Throws Exception {
To cast a form into a UserForm object
UserForm userform= (UserForm) Form;
System.out.println ("User name =" +userform.getusername ());
To verify
if ("123". Equals (Userform.getpassword ())) {
Request.setattribute ("username", userform.getusername ());
Return Mapping.findforward ("OK");
}else{
Return Mapping.findforward ("err");
}
}
}
Five: Write filters to deal with coding problems
public class MyFilter1 extends HttpServlet implements Filter {
public void DoFilter (ServletRequest arg0, Servletresponse arg1,
Filterchain arg2) throws IOException, Servletexception {
//test whether to enter the filter
System.out.println ("has entered the filter");
Set the Received encoding
Arg0.setcharacterencoding ("Utf-8");
Arg2.dofilter (arg0, arg1);
Set encoding for response processing
Arg1.setcontenttype ("Text/html;charse=utf-8");
}
public void init (Filterconfig arg0) throws Servletexception {
TODO auto-generated Method Stub
}
}
VI: Writing the struts-config.xml core configuration file
<?xml version= "1.0" encoding= "Utf-8"?>
<! DOCTYPE struts-config Public "-//apache software foundation//dtd struts Configuration 1.3//en" "/http Struts.apache.org/dtds/struts-config_1_3.dtd ">
<struts-config>
<!--configuration Forms--
<form-beans>
<!--name is table sole name, the recommended class name is lowercase--
<!--type is used to specify the full path of the form class--
<form-bean name= "UserForm" type= "Com.cloud.form.UserForm" ></form-bean>
</form-beans>
<!--Configure action--
<action-mappings>
<!--Configure a specific action--
<!--path represents the resource name Http//localhost:8080/path? -
<!--name is used to correlate a form to remove elements from the form--
<!--Specify the full path of the action class--
<action path= "/login" name= "UserForm" type= "Com.cloud.action.LoginAction" >
<!--Configuring a jump relationship--
<forward name= "OK" path= "/web-inf/wel.jsp"/>
<forward name= "Err" path= "/web-inf/err.jsp"/>
</action>
</action-mappings>
</struts-config>
Seven: Write Login success and failure page
wel.jsp
<body>
Ok;<%=request.getattribute ("username"). toString ()%><br/>
<a href= "/loginstruts/" > re-login </a>
</body>
err.jsp
<body>
Err
</body>
VIII: Writing the Web. XML project configuration file
<?xml version= "1.0" encoding= "UTF-8"?>
<web-app version= "2.5"
Xmlns= "Http://java.sun.com/xml/ns/javaee"
Xmlns:xsi= "Http://www.w3.org/2001/XMLSchema-instance"
Xsi:schemalocation= "Http://java.sun.com/xml/ns/javaee
Http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd ">
<welcome-file-list>
<welcome-file>index.jsp</welcome-file>
</welcome-file-list>
<servlet>
<servlet-name>action</servlet-name>
<servlet-class>org.apache.struts.action.ActionServlet</servlet-class>
<!--configuring Struts-config paths--
<init-param>
<param-name>config</param-name>
<param-value>/WEB-INF/struts-config.xml</param-value>
</init-param>
</servlet>
<servlet-mapping>
<servlet-name>action</servlet-name>
<url-pattern>*.do</url-pattern>
</servlet-mapping>
<!--Configure Filters--
<filter>
<filter-name>MyFilter1</filter-name>
<filter-class>com.cloud.filters.MyFilter1</filter-class>
</filter>
<filter-mapping>
<filter-name>MyFilter1</filter-name>
<!--for all filters--
<url-pattern>/*</url-pattern>
</filter-mapping>
</web-app>
Note: Struts here need to download their own package import project, the case using STRUTS1, if there are errors and suggestions welcome to make friends together.
qq:1327880701
Copyright Notice: Bo Master original articles, reproduced please indicate the source. Http://blog.csdn.net/dzy21
Struts Principle Primer-Login Program
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