JFinal学习笔记-Demo 部署-lesson02

延续 JFinal lesson01，开始搭建一个 JFinal 案例

JFinal 是 JAVA 极速 WEB 开发的开源框架

一、环境：MyEclipse9+Tomcat6+MySql;
二、准备 jar 包，如下图：

三、开始在MyEclipse9+Tomcat6+MySql部署一个学生信息管理小Demo：

1. 创建Web Project工程；
2. 在WEB-INFO文件目录下新建lib文件夹并放入四个jar包，然后build path；

3. 创建jfinalstudy01数据库并创建两张表student+classes，如下：

   create table classes
   (
       classesid      int(4) not null,
       classesname    varchar(40),
       classesaddress varchar(60)
   );
   create table student
   (
       studentid   int(4) not null,
       studentname varchar(10),
       studentage  int(4),
       studentsex  varchar(4),
       classesid   int(4)
   );

4. 添加以下配置至web.xml（同时新建JFinalAllConfig类）:

   

   public class JFinalAllConfig extends JFinalConfig {
   
      @Override
      public void configConstant(Constants me) {
              me.setDevMode(true);
      }
   
      @Override
      public void configRoute(Routes me) {
              me.add("/", StudentController.class);
              me.add("/student", StudentController.class);
      }
   
      @Override
      public void configPlugin(Plugins me) {
              C3p0Plugin cp = new C3p0Plugin(
                              "jdbc:mysql://localhost:3306/JFinalStudy01", "root", "");
              me.add(cp);
              ActiveRecordPlugin arp = new ActiveRecordPlugin(cp);
              me.add(arp);
           
              // 三个参数依次为表名、主键、model
              arp.addMapping("student", "studentid", Student.class);
              arp.addMapping("classes", "classesid", Classes.class);
      }
   
      @Override
      public void configInterceptor(Interceptors me) {
              // TODO Auto-generated method stub
   
      }
   
      @Override
      public void configHandler(Handlers me) {
              // TODO Auto-generated method stub
   
      }
   
      }

5. 新建Student、Classes的model：

   • Student：

     package com.phy.jfinal.model;
     
     import com.jfinal.plugin.activerecord.Model;
     
     public class Student extends Model {
     
            private static final long serialVersionUID = 1L;
         
            public static final Student dao = new Student();
     
            public Classes getClasses() {
                    return Classes.dao.findById(get("classesid"));
            }
     }

   • Classes：

     package com.phy.jfinal.model;
     
     import com.jfinal.plugin.activerecord.Model;
     
     public class Classes extends Model {
             
            private static final long serialVersionUID = 1L;
         
            public static final Classes dao = new Classes();
     }

6. 新建StudentController（接收HTTP请求处理的控制器）：

   package com.phy.jfinal.controller;
   
   import java.util.List;
   
   import com.jfinal.aop.Before;
   import com.jfinal.core.Controller;
   import com.phy.jfinal.interceptor.StudentInterceptor;
   import com.phy.jfinal.model.Student;
   import com.phy.jfinal.validator.StudentValidator;
   
   public class StudentController extends Controller {
              private static int num = 0;
   
                // 进行获取学生信息列表前的拦截操作
              @Before(StudentInterceptor.class)
              public void index() {
                      List list = Student.dao.find("select * from student");
                      setAttr("studentList", list);
                      render("/index.html");
              }
   
              public void add() {
                      render("/add.html");
              }
   
              public void delete() {
                      // 获取url请求中第一个值
                      Student.dao.deleteById(getParaToInt());
                      forwardAction("/student");
              }
   
              public void update() {
                      Student student = getModel(Student.class);
                      student.update();
                      forwardAction("/student");
              }
   
              public void get() {
                      Student student = Student.dao.findById(getParaToInt());
                      setAttr("student", student);
                      render("/index2.html");
              }
   
             //StudentValidator是对进行保存操作时的变量的验证
            @Before(StudentValidator.class)
             public void save() {
                     Student student = getModel(Student.class);
                     student.set("studentid", num++).save();
                     forwardAction("/student");
             }
      }

7. 拦截器及验证器：

   • 拦截器

     package com.phy.jfinal.interceptor;
     
     import com.jfinal.aop.Interceptor;
     import com.jfinal.core.ActionInvocation;
     
     public class StudentInterceptor implements Interceptor {
     
            @Override
            public void intercept(ActionInvocation ai) {
                    System.out.println("action注入之前");
                        ai.invoke();
                    System.out.println("action注入之后");
             }
     }

   • 验证器

     package com.phy.jfinal.validator;
     
     import com.jfinal.core.Controller;
     import com.jfinal.validate.Validator;
     
     public class StudentValidator extends Validator {
     
            //在校验失败时才会调用
            @Override
            protected void handleError(Controller controller) {
                    controller.keepPara("student.studentname");//将提交的值再传回页面以便保持原先输入的值
                      controller.render("/add.html");
            }
     
           @Override
           protected void validate(Controller controller) {
                    //验证表单域name，返回信息key,返回信息value
                    validateRequiredString("student.studentname", "studentnameMsg",
                            "请输入学生名称!");
           }
     }

8. 前台实现（通过freemarker读取数据），在WebRoot目录下新建index.html，add.html，change.html(分别为学生信息列表获取、学生信息添加、学生信息修改，下面依次列出实现代码)：

   • index.html
     
     
   • add.html
     
     
   • change.html
     
     

9. 三个CSS文件（添加在WebRoot目录下的css文件夹下：

   • common.css
     
   • add.css
     
   • index.css
     

10. 以下分别为整体项目目录结构及相关截图：