Struts2的Collection和Map支持
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package HelloWorld;
public class User {
private String username;
private String password;
private String[] books;
public String[] getBooks() {
return books;
}
public void setBooks(String[] books) {
this.books = books;
}
public String getUsername() {
return username;
}
public void setUsername(String username) {
this.username = username;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
}
package HelloWorld;
import java.util.List;
import com.opensymphony.xwork2.Action;
import com.opensymphony.xwork2.ActionContext;
public class LoginAction implements Action{
private String tip;
private List users;
public List getUsers() {
return users;
}
public void setUsers(List users) {
this.users = users;
}
public String execute() throws Exception{
//用第一个user做逻辑判断
if(((User)this.getUsers().get(0)).getUsername().equals("admin")&&((User)this.getUsers().get(0)).getPassword().equals("1234")){
ActionContext.getContext().getSession().put("user", ((User)this.getUsers().get(0)).getUsername());
BookService bs=new BookService();
((User)this.getUsers().get(0)).setBooks(bs.getBooks());
this.setTip("welcome welcome");
return SUCCESS;
}else{
return ERROR;
}
}
public String getTip() {
return tip;
}
public void setTip(String tip) {
this.tip = tip;
}
}
<%@ page language="java" contentType="text/html; charset=gb2312"
pageEncoding="gb2312"%>
<%@ taglib prefix="s" uri="/struts-tags" %>
<html>
<head>
<title></title>
</head>
<body>
<s:form action="Login">
<s:textfield name="users[0].username" key="username"></s:textfield>
<s:textfield name="users[0].password" key="password"></s:textfield>
<s:textfield name="users[1].username" key="username"></s:textfield>
<s:textfield name="users[1].password" key="password"></s:textfield>
<s:submit value="login"></s:submit>
</s:form>
</body>
</html>
struts2提供了从页面直接封装到List的功能，实现起来有两个办法
1.使用泛型定义集合中的对象类型
2.配合配置文件定义集合中的对象类型
User.java
package HelloWorld;public class User {
public class User private String username; private String password; private String[] books; public String[] getBooks() {
public String[] getBooks() return books; } public void setBooks(String[] books) { this.books = books; } public String getUsername() { return username; } public void setUsername(String username) { this.username = username; } public String getPassword() { return password; } public void setPassword(String password) { this.password = password; }}LoginAction.java （不使用泛型，使用配置文件定义集合中对象的类型）
package HelloWorld;import java.util.List;import com.opensymphony.xwork2.Action;import com.opensymphony.xwork2.ActionContext;public class LoginAction implements Action{ private String tip;private List users;public List getUsers() { return users;}public void setUsers(List users) { this.users = users;}public String execute() throws Exception{ //用第一个user做逻辑判断 if(((User)this.getUsers().get(0)).getUsername().equals("admin")&&((User)this.getUsers().get(0)).getPassword().equals("1234")){ ActionContext.getContext().getSession().put("user", ((User)this.getUsers().get(0)).getUsername()); BookService bs=new BookService(); ((User)this.getUsers().get(0)).setBooks(bs.getBooks()); this.setTip("welcome welcome"); return SUCCESS; }else{ return ERROR; } }public String getTip() { return tip;}public void setTip(String tip) { this.tip = tip;} }
LoginAction_conversion.properties (放在和LoginAction同目录)
Element_users=HelloWorld.User
表示集合中的Element类型是User,如果是Map类型，则还需要定义Key_users=****
index.jsp
<%@ page language="java" contentType="text/html; charset=gb2312" pageEncoding="gb2312"%><%@ taglib prefix="s" uri="/struts-tags" %><html> <head> <title></title> </head> <body> <s:form action="Login"> <s:textfield name="users[0].username" key="username"></s:textfield> <s:textfield name="users[0].password" key="password"></s:textfield> <s:textfield name="users[1].username" key="username"></s:textfield> <s:textfield name="users[1].password" key="password"></s:textfield> <s:submit value="login"></s:submit> </s:form> </body></html>
如果使用泛型定义List users，则可以省略LoginAction-conversion.properties文件
private List<List> users
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