javabeans

问题 I have a Session scoped bean import javax.faces.bean.SessionScoped; import javax.inject.Named; @Named @SessionScoped public class SessionBean implements Serializable{ I inyect the object in one Filter... public class FiltroSeguridad implements Filter{ @Inject private SessionBean sessionBean; @Override public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException { HttpServletRequest httpRequest = (HttpServletRequest) request;

问题 I have a Java bean which has a field which in turn is another bean public class BeanOne { private String fieldOne; private BeanTwo fieldTwo; public String getFieldOne() {return this.fieldOne;} public void setFieldOne(String fieldOne){this.fieldOne = fieldOne} public BeanTwo getFieldTwo() {return this.fieldTwo;} public void setFieldTwo(BeanTwo fieldTwo){this.fieldTwo = fieldTwo} } public class BeanTwo { private String fieldOne; public String getFieldOne() {return this.fieldOne;} public void

问题 I'm really stuck into trying to map my QueryString parameters into my Spring JavaBean Command object here, and I couldn't find an answer to my question so far. I'm using jQuery Datatables plugin with server side processing so that each action in my datatable, triggers an AJAX request to my Spring application. This is the parameters the Datatable plugin is sending to my Rest service: http://localhost:8080/relatorios/produtos-source?draw=2&columns[0][data]=nome&columns[0][name]=&columns[0]

问题 I'm really stuck into trying to map my QueryString parameters into my Spring JavaBean Command object here, and I couldn't find an answer to my question so far. I'm using jQuery Datatables plugin with server side processing so that each action in my datatable, triggers an AJAX request to my Spring application. This is the parameters the Datatable plugin is sending to my Rest service: http://localhost:8080/relatorios/produtos-source?draw=2&columns[0][data]=nome&columns[0][name]=&columns[0]

问题 Let's say you have two instances of the same bean type, and you'd like to display a summary of what has changed between the two instances - for example, you have a bean representing a user's settings in your application, and you'd like to be able to display a list of what has changed in the new settings the user is submitting (instance #1) versus what is stored already for the user (instance #2). Is there a commonly used algorithm or design pattern for a task such as this, perhaps something

问题 In my application I run into a problem that when a getter in a class is defaulted in an interface only (Java 8 feature), there is no Java Beans property as a result. I.e. for normal method invocation it works just as a standard method, but for access through "properties" it suddenly behaves differently... Here is a test case: import java.beans.Introspector; import java.util.Arrays; import java.util.stream.Collectors; import org.apache.commons.beanutils.PropertyUtils; public class test {

问题 I have an action URL after clicking a hyper link like so /SocialStupendous/GetProfile.action?slno=3&slno=3 In my execute method of ActionClass I have the following code public String execute() { int urislno=Integer.parseInt(getServletRequest().getParameter("slno")); System.out.println(urislno); bean.setUslno(urislno); } I am getting NullPointerException when I am performing bean.setuslno(urislno) . Even though urislno is printed properly as 3 . ProfileBean class: public class ProfileBean {

问题 I have an action URL after clicking a hyper link like so /SocialStupendous/GetProfile.action?slno=3&slno=3 In my execute method of ActionClass I have the following code public String execute() { int urislno=Integer.parseInt(getServletRequest().getParameter("slno")); System.out.println(urislno); bean.setUslno(urislno); } I am getting NullPointerException when I am performing bean.setuslno(urislno) . Even though urislno is printed properly as 3 . ProfileBean class: public class ProfileBean {

问题 There are many documentations out there on how to achieve this task but I still couldn't resolve my issue. I'm new to working with servlet so I probably missed something. I use red5 that uses tomcat 6 to create a servlet that uses a spring bean that's of a MysqlDb class for database manipulations. when I point to red5 using port 5080 it acts as a regular tomcat server and i can browse jsp and servlet pages. my web.xml contains the following relevant information: <listener> <listener-class>org

问题 I am using the JPA in my webapp and I can't figure out how to persist two new entities that relate to each other. Here an example: These are the two entities +-----------------+ +--------------------+ | Consumer | | ProfilePicture | +-----------------+ +--------------------+ | id (PK) |---| consumerId (PPK+FK)| | userName | | url | +-----------------+ +--------------------+ The Consumer has an id and some other values. The ProfilePicture uses the Consumer 's id as it's own primary key and as