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Solved: Suggestions To Fix The Servlet Request Object In Struts2

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    If you see the Servlet Request Object in struts2, this tutorial might help. g.ServletRequestAware is a better concept because it decouples action methods from fixed accessors. In order to test something that the ServletActionContext buys, you need to simulate static systems and simulate demand. To test the ServletRequestAware methods, all you have to do is simulate your current request.

    There are two ways to get a Servlet request protest in the “participates” method of the Struts 2 action class. ServletActionContext: Direct access to the getRequest method from a training session ServletActionContext returns an object request.

    g.

    In Struts, you can use the following two methods to get the Ht objecttpServletRequest.

    1. ServletActionContext

    Get the HttpServletRequest object directly from org.apache.struts2.ServletActionContext.

    How do I get HttpServletRequest from interceptor?

    To get the HttpServletRequest in this interceptor, I used the following code: HttpServletRequest look for = (HttpServletRequest) ActionContext. getContext (). get (HTTP_REQUEST);

     import javax.servlet.http.HttpServletRequest;import org.apache.struts2.ServletActionContext;Public field LocaleAction// business logicpublic line run ()HttpServletRequest request = ServletActionContext.getRequest ();Return "SUCCESS"; 

    2. ServletRequestAware

    How do you request an object in struts2?

    ServletActionContext. Get the HttpServletRequest object directly from the organization. Apache. Endeavor 2. ServletActionContext.ServletRequestAware. Ask your class to implement the World Wide Web. Apache. Endeavor 2. Interceptor.

    Make sure your class uses org.apache.struts2.interceptor.ServletRequestAware.

    If the Struts 2 “servlet-config” interceptor could see the action, if the class is passed from the ServletRequestAware interface, it uses the HttpServletRequest reference to the action class requested with the setServletRequest () method.

     import javax.servlet.http.HttpServletRequest;import org.apache.struts2.interceptor.ServletRequestAware;LocaleAction public course implements ServletRequestAwareHttpServletRequest logicpublic demand;// execute the commercial chain ()String param = getServletRequest (). GetParameter ("parameter");Return "SUCCESS";unnecessary public setServletRequest (HttpServletRequest request)this.request = request;public HttpServletRequest getServletRequest ()return this.request; 

    The Struts 2 documentation strongly recommends using ServletRequestAware instead of ServletActionContext.

    Link

    1. http: //struts.apache .org / 2.x / docs / how-can-we-access-the-httpservletrequest.html
    2. http://struts.apache.org/2.0.6/struts2-core/apidocs/org/apache/ struts2 / interceptor / ServletRequestAware.html

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    Comments

    How do you request an object in struts2?

    ServletActionContext. Get the HttpServletRequest object specifically from org. Apache. Endeavor 2. ServletActionContext.ServletRequestAware. Let your class implement the Internet. Apache. Endeavor 2. Interceptor.

    In some cases, we don’t need to access HttpServletRequestor HttpServletResponse objects directly in a huge Struts application. However, the a structure allows us to access this request / response pair whenever we really need it with our action class, which implements the ServletRequestAware or ServletResponseAware interfaces.

    1. Implementing ServletRequestAware

    The following code example demonstrates how the procedure class implements the ServletRequestAware interface and this setServletRequest () method:

     public class MyAction extends hardware ActionSupport ServletRequestAwareprivate request HttpServletRequest;@ Crushpublic void setServletRequest (HttpServletRequest request)this.request = request;public execution chain ()// Communication with the methods of the HttpServletRequest objectThe username string equals request.getParameter ("username");System.out.println ("Username =" + Username);Our ad SUCCESS;

    After composition determines that the action class implements this ServletRequestAware interface, it passes the toy type HttpServletRequest to the setServletRequest () method so that we can get a mention of a particular method being called upon the request of the servlet that is executed on the method action

    2. ServletResponseAware Implementation Of The Exact Interface

    Similarly, the following code example shows the fuel consumption rate of the ServletResponseAware interface:

    servlet request object in struts2

     public class MyAction extends ActionSupport, implements ServletResponseAwareprivate HttpServletResponse;@ Crushpublic void setServletResponse (HttpServletResponse response)this.response = response;public line run ()// Access the method of the HttpServletResponse object// WARNING: this code is for testing purposes only, the situation is not recommended!TryPrintWriter-Writer means response.getWriter ();write.println ("Something went wrong");write.flush (); // Force emptying the whole responsecatch (IOException ex)for example printStackTrace ();// return This doesn't really make sense because the response started with a resetBack SUCCESS;

    servlet request object in struts2

    As shown in the above code, interacting with the HttpServletResponse object in the Struts 2 action type is deprecated This is because it will restore the normal workflow of the platform. This is only possible with a valid reason. Now let’s move on to an example in which we use the HttpServletRequest object to read the parameter values ​​passed in the URL query string and print them to the results page.

    3. Struts Action Class Code

     package net.codejava.struts;import javax.servlet.http.HttpServletRequest;import org.apache.struts2.interceptor.ServletRequestAware;import com.opensymphony.xwork2.ActionSupport;public MyAction Charm extends ActionSupport, implements ServletRequestAwareprivate request HttpServletRequest;@ Crushpublic void setServletRequest (HttpServletRequest request)this.request = request;public channel// execute () - access parameters from the URL query string instead of the HTML form:The string userName is equal to request.getParameter ("username");String email = request.getParameter ("email");// Set the values ​​that are in the scope request so that the check result can be readrequest.setAttribute ("username", username);request.setAttribute ("Email", Email);Back SUCCESS;

    As follows from the promo code, we read two parameters from the request: username and email address mail. This way, we can pass parameters in the url query string rather than somewhere in the HTML form as usual.

    4. Code The Results Page As Usual

     <% @ page language = "java" contentType = "text / html; charset = ISO-8859-1"    pageEncoding = "ISO-8859-1"%> Result 

    Username: $ Username

    Email: $ E-mail

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    This JSP page simply uses EL expressions to get the values ​​of three parameters defined by the activity class.

    5. Configuration In Struts.We Xml

    How can we get access to the HTTP servlet response?

    Implement the ServletRequestAware interface.Frequent implementation of the ServletResponseAware interface.Schedule of the Struts School of Action.Code the results page.Suction configuration.Go out.

    and at the same time bind this action class and JSP page in struts.xml like this:

     

    / Result.jsp

    6. Exit

    How can we get access to the HTTP servlet response?

    Access the HttpServletResponse by implementing the ServletResponseAware interface and overriding the setServletResponse () program.

    The following screenshot shows the output displayed when the sample application is launched with ethat url:

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    Nam Ha Min
    Last updated July 31, 2019 & nbsp | & nbsp Print Email

    About The Author:

    Nam Ha Min is a Certified Java Programmer (SCJP and SCWCD). He started programming Java in the Java 1.4 style and recently fell in love with Java.

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    How do I get HttpServletRequest from interceptor?

    To get the latest HttpServletRequest interceptor, I used the following coupon: HttpServletRequest request = (HttpServletRequest) ActionContext. getContext (). get (HTTP_REQUEST);

    How do I pass HttpServletRequest in Java?

    5 answers. Pass it to the type constructor: public class XmlParser last private HttpServletRequest; public XmlParser (HttpServletRequest) this. Demand = Demand; // use in other applications

    How to get the Servlet Request object inside Struts 2 Action class’s execute?

    There are almost always two ways to display the servlet request object in the class execution method of the Struts 2 project. ServletActionContext: Direct access to the getRequest method from all ServletActionContext classes returns the requesting object.

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