您的位置：首页 > 编程语言 > Java开发

Struts2 页面获取参数 List,Set,Map 及调用函数和实例化对象

2014-12-05 15:44 465 查看

相应的action，在action中实例化了许多需要传递给客户端的参数

public class OgnlAction extends ActionSupport {
private Cat cat = new Cat();
private Map<String, Dog> dogMap = new HashMap<String, Dog>();

private Set<Dog> dogs = new HashSet<Dog>();

private String password;

private User user = new User();
private String username;

private List<User> users = new ArrayList<User>();

public OgnlAction() {
users.add(new User(1));
users.add(new User(2));
users.add(new User(3));

dogs.add(new Dog("dog1"));
dogs.add(new Dog("dog2"));
dogs.add(new Dog("dog3"));

dogMap.put("dog100", new Dog("dog100"));
dogMap.put("dog101", new Dog("dog101"));
dogMap.put("dog102", new Dog("dog102"));

}

public String execute() {
System.out.println(user.toString());
return SUCCESS;
}

public Cat getCat() {
return cat;
}

public Map<String, Dog> getDogMap() {
return dogMap;
}

public Set<Dog> getDogs() {
return dogs;
}

public String getPassword() {
return password;
}

public User getUser() {
return user;
}

public String getUsername() {
return username;
}

public List<User> getUsers() {
return users;
}

public String m() {
return "hello";
}

public void setCat(Cat cat) {
this.cat = cat;
}

public void setDogMap(Map<String, Dog> dogMap) {
this.dogMap = dogMap;
}

public void setDogs(Set<Dog> dogs) {
this.dogs = dogs;
}

public void setPassword(String password) {
this.password = password;
}

public void setUser(User user) {
this.user = user;
}

public void setUsername(String username) {
this.username = username;
}

public void setUsers(List<User> users) {
this.users = users;
}
}

服务区相关的实体类对象和工具类

public class Cat {

private Dog friend;

public Dog getFriend() {
return friend;
}

public void setFriend(Dog friend) {
this.friend = friend;
}

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

public class Dog {

private String name;

public Dog() {

}

public Dog(String name) {
super();
this.name = name;
}

public String getName() {
return name;
}

public void setName(String name) {
this.name = name;
}

@Override
public String toString() {
return "dog: " + name;
}
}

public class User {
private int age = 8;

public User() {

}

public User(int age) {
super();
this.age = age;
}

public int getAge() {
return age;
}

public void setAge(int age) {
this.age = age;
}

@Override
public String toString() {
return "user" + age;
}
}

public class S {
public static String STR = "STATIC STRING";

public static String s() {
return "static method";
}
}

客户端页面获取参数

<body>
<ol>
<li>访问值栈中的action的普通属性: username = <s:property value="username"/> </li>
<li>访问值栈中对象的普通属性(get set方法)：<s:property value="user.age"/> | <s:property value="user['age']"/> | <s:property value="user[\"age\"]"/> | wrong: <%--<s:property value="user[age]"/>--%></li>
<li>访问值栈中对象的普通属性(get set方法): <s:property value="cat.friend.name"/></li>
<li>访问值栈中对象的普通方法：<s:property value="password.length()"/></li>
<li>访问值栈中对象的普通方法：<s:property value="cat.miaomiao()" /></li>
<li>访问值栈中action的普通方法：<s:property value="m()" /></li>
<hr />
<li>访问静态方法：@com.yao.action.ognl.S@s()   <s:property value="@com.yao.action.ognl.S@s()"/></li>
<li>访问静态属性：@com.yao.action.ognl.S@STR   <s:property value="@com.yao.action.ognl.S@STR"/></li>
<li>访问Math类的静态方法：@@max(2,3)    <s:property value="@@max(2,3)" /></li>
<hr />

<s:set name="user1" value="new com.yao.action.ognl.User(9)" scope="request"></s:set>
<li>创建一个对象，访问对象:<s:property value="#request.user1.toString()"/>|${user1.age}<br></li>
<li>访问普通类的构造方法：new com.yao.action.ognl.User(8)  <s:property  value="new com.yao.action.ognl.User(8)"  /></li>
<hr />
<li>访问List:<s:property value="users"/></li>
<li>访问List中某个元素:<s:property value="users[1]"/></li>
<li>访问List中元素某个属性的集合:<s:property value="users.{age}"/></li>
<li>访问List中元素某个属性的集合中的特定值:<s:property value="users.{age}[0]"/> | <s:property value="users[0].age"/></li>
<li>访问Set:<s:property value="dogs"/></li>
<li>访问Map:<s:property value="dogMap"/></li>
<li>访问Map中某个元素:<s:property value="dogMap.dog101"/> | <s:property value="dogMap['dog101']"/> | <s:property value="dogMap[\"dog101\"]"/></li>
<li>访问Map中所有的key:<s:property value="dogMap.keys"/></li>
<li>访问Map中所有的value:<s:property value="dogMap.values"/></li>
<li>访问容器的大小：<s:property value="dogs.size()"/> | <s:property value="dogMap.size()"/> | <s:property value="users.size"/> </li>
<hr />
<li>投影(过滤)：<s:property value="users.{?#this.age==1}[0]"/></li>
<li>投影：<s:property value="users.{^#this.age>1}"/></li>
<li>投影：<s:property value="users.{$#this.age>1}.{age}"/></li>
<li>投影：<s:property value="users.{$#this.age>1}.{age} == null"/></li>
<hr />
<!-- 获取参数值 -->
<li>[]:<s:property value="[0].username"/></li>
<li>[]:<s:property value="[0].password"/></li>
</ol>

<s:debug></s:debug>
</body>

内容来自用户分享和网络整理，不保证内容的准确性，如有侵权内容，可联系管理员处理

标签：

相关文章推荐

新的分享

章节导航