【 Struts2 配置】Struts2基本搭建

<?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.i18n.encoding" value="UTF-8"></constant>
    
    <package name="struts2-hibernate" extends="struts-default" namespace="/">
        <action name="student_*" class="k.action.StudentAction" method="{1}">
            <result name="list" type="redirectAction">student_list</result>
            <result name="toList">/WEB-INF/student/list.jsp</result>
            <result name="toAdd">/WEB-INF/student/toAdd.jsp</result>
            <result name="toUpdate">/WEB-INF/student/toUpdate.jsp</result>

        </action>
    </package>

</struts>

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd"
         version="3.1">

    <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>/*</url-pattern>
    </filter-mapping>

    <listener>
        <listener-class>k.util.StartSystemListener</listener-class>
    </listener>

    <welcome-file-list>
        <welcome-file>index.html</welcome-file>
        <welcome-file>index.htm</welcome-file>
        <welcome-file>index.jsp</welcome-file>
    </welcome-file-list>
</web-app>

package k.action;

import com.opensymphony.xwork2.ActionSupport;
import k.domain.Student;
import k.service.StudentService;
import org.apache.struts2.ServletActionContext;

import javax.servlet.http.HttpServletRequest;
import java.util.List;

public class StudentAction extends ActionSupport {
    public String list() {
        StudentService service = new StudentService();
        List list = service.list();
        HttpServletRequest request = ServletActionContext.getRequest();
        if (list == null || list.size() <= 0) {
            list.add(new Student("默认", 1));
        }
        request.setAttribute("list", list);
        return "toList";
    }

    public String toAdd() {
        return "toAdd";
    }

    public String add() {
        HttpServletRequest request = ServletActionContext.getRequest();
        String name = request.getParameter("name");
        String age = request.getParameter("age");
        StudentService service = new StudentService();
        service.add(new Student(name, Integer.parseInt(age)));
        return "list";
    }

    public String toUpdate() {
        HttpServletRequest request = ServletActionContext.getRequest();
        String id = request.getParameter("id");
        StudentService service = new StudentService();
        Student model = service.getModel(id);
        request.setAttribute("stu", model);
        return "toUpdate";
    }

    public String update() {
        HttpServletRequest request = ServletActionContext.getRequest();
        String id = request.getParameter("id");
        String name = request.getParameter("name");
        String age = request.getParameter("age");
        Student student = new Student(name, Integer.parseInt(age));
        student.setId(Integer.parseInt(id));
        StudentService service = new StudentService();
        service.update(student);
        return "list";
    }

    public String delete() {
        HttpServletRequest request = ServletActionContext.getRequest();
        String id = request.getParameter("id");
        StudentService service = new StudentService();
        Student model = service.getModel(id);
        service.delete(model);
        return "list";
    }
}