struts2学习笔记

Posted 2021-04-28 AndroidJava

 

一、Action类的编写方式

 

二、Action获取请求参数

方式一:通过request获取属性注入

private static  final long serialVersionUID = 1L;         private String name;     private Integer age;         public void setName(String name) {        this.name = name;     }     public void setAge(Integer age) {        this.age = age;     }     public String list(){        //将属性值放入request域中 //相当于request的setAttribute        ActionContext.getContext().put("name",name);        ActionContext.getContext().put("age",age);        return NONE;     }

浏览器访问:http://localhost:8080/Day02/param_regist?name=test&age=12    

      方式二:Model属性注入

private User  user;       public User getUser() {        return user;     }     public void setUser(User user) {        this.user = user;     }     public String regist(){        System.out.println(user);        return NONE;     }

浏览器访问:http://localhost:8080/Day02/param_regist?user.name=test&user.age=12

    

方式三:ModelDriven注入需要实现ModelDriven接口

private User user=new User();     @Override     public User getModel() {        returnuser;     }     public String regist(){        System.out.println(user);        returnNONE;     }

浏览器访问:http://localhost:8080/Day02/param_regist?name=test&age=12   

   

三、案例

List数据封装

private List<User>users=new  ArrayList<>();       public List<User> getUsers()  {        returnusers;     }     publicvoid setUsers(List<User> users) {        this.users = users;     }     public String collect(){        for(User user:users){            System.out.println(user);        }        returnNONE;     }

<form  action="${pageContext.request.contextPath}/collection_collect">     <fieldset>        <legend>信息一</legend>        <label for="name">姓名</label>        <input type="text"  id="name" name="users[0].name"/>        <label for="age">年龄</label>        <input type="text"  id="age" name="users[0].age"/>               <legend>信息一</legend>        <label for="name">姓名</label>        <input type="text"  id="name" name="users[1].name"/>        <label for="age">年龄</label>        <input type="text"  id="age" name="users[1].age"/>     </fieldset>     <input type="submit"  value="提交"/> </form>

Map数据封装

private Map<String,User>userMap=new  HashMap<>();       public Map<String, User>  getUserMap() {        returnuserMap;     }     publicvoid setUserMap(Map<String,  User> userMap) {        this.userMap = userMap;     }     public String collect(){        Set<String>keies=userMap.keySet();        for(String key:keies){            System.out.println(userMap.get(key));        }        returnNONE;     }

<form action="${pageContext.request.contextPath}/collection_collect">     <fieldset>        <legend>信息一</legend>        <label for="name">姓名</label>        <input type="text" id="name"  name="userMap['user1'].name"/>        <label for="age">年龄</label>        <input type="text" id="age"  name="userMap['user1'].age"/>               <legend>信息一</legend>        <label for="name">姓名</label>        <input type="text" id="name"  name="userMap['user2'].name"/>        <label for="age">年龄</label>        <input type="text" id="age"  name="userMap['user2'].age"/>     </fieldset>     <input type="submit"  value="提交"/> </form>

  

四、类型转换器

自定义时间转换器案例

       自定义MyDateConvert 转换器

publicclass MyDateConvert extends StrutsTypeConverter{     @Override     public Object convertFromString(Map  context, String[] values, Class toClass) {        if(values!=null && values.length==1 && toClass.equals(Date.class)){             SimpleDateFormat simpleDateFormat = new SimpleDateFormat("yyyy/MM/hh");            try {               returnsimpleDateFormat.parse(values[0]);            } catch (ParseException e) {               e.printStackTrace();            }        }        returnnull;     }         @Override     public String convertToString(Map  context, Object o) {        SimpleDateFormat simpleDateFormat = new SimpleDateFormat("yyyy/MM/hh");        returnsimpleDateFormat.format((Date)o);     } }

   

配置,注意配置文件必须在编译后的classes目录下

   

          

   

      

 使用

publicclass ConvertController extends ActionSupport{     private String name;     private Date birthday;     publicvoid setName(String name) {        this.name = name;     }     publicvoid setBirthday(Date birthday) {        this.birthday = birthday;     }       public String convert(){        System.out.println(name);        System.out.println(birthday);        returnNONE;     } }

 

五、Struts拦截器

执行流程图(详细)

   

执行流程分析

    

默认拦截器

 

 

 

 

 

 

 

 

 

 

 

 

 

 

LoginInterceptor

struts.xml