struts开发<struts中的參数传递.三>
2024-08-29 06:40:59
不说废话，直接上干货
1.通过set和get传递參数
添加username 和password两个属性并添加set和get方法
package fzl.user.struts.demo; import com.opensymphony.xwork2.ActionContext;
import com.opensymphony.xwork2.ActionSupport; public class UserAction extends ActionSupport {
private String username;
private String password;
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;
}
public String list(){ System.out.println("list");
return "success";
}
public String input(){
System.out.println("input");
return "success";
} public String add(){ System.out.println("add");
return "success";
}}
在list使用EL表达式和struts标签调用
<pre name="code" class="html"><span style="font-size:18px;"><%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8" %>
<%@ taglib prefix="s" uri="/struts-tags" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
</head>
<body>
通过EL訪问
${username }-->${password }
<h1>------------------list -----------------</h1>
通过struts标签訪问
<s:property value="username"/>--><s:property value="password"/>
</body>
</html></span>
在浏览器输入http://localhost:9000/strustDemo1/User_list?username=fzl&password=123 传入參数
另外一种方法，通过Actioncontext完毕
<span style="font-size:18px;">package fzl.user.struts.demo; import com.opensymphony.xwork2.ActionContext;
import com.opensymphony.xwork2.ActionSupport; public class UserAction extends ActionSupport {
private String username;
private String password;
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;
}
public String list(){
ActionContext.getContext().put("username", "flyou");
ActionContext.getContext().put("password", "553274238");
System.out.println("list");
return "success";
}
public String input(){
System.out.println("input");
return "success";
} public String add(){ System.out.println("add");
return "success";
}}</span>
list文件不用改动
第三种方法。通过servletAPI传值
<span style="font-size:18px;">package fzl.user.struts.demo; import org.apache.struts2.ServletActionContext; import com.opensymphony.xwork2.ActionContext;
import com.opensymphony.xwork2.ActionSupport; public class UserAction extends ActionSupport {
private String username;
private String password;
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;
}
public String list(){
//ActionContext.getContext().put("username", "flyou");
//ActionContext.getContext().put("password", "553274238");
ServletActionContext.getRequest().setAttribute("username", "flyou");
ServletActionContext.getRequest().setAttribute("password", "553274238");
System.out.println("list");
return "success";
}
public String input(){
System.out.println("input");
return "success";
} public String add(){ System.out.println("add");
return "success";
}}</span>
list文件
<span style="font-size:18px;"><%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8" %>
<%@ taglib prefix="s" uri="/struts-tags" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
</head>
<body>
通过EL訪问
${username }-->${password }
<h1>------------------list -----------------</h1>
通过struts标签訪问
<span style="background-color: rgb(204, 0, 0);"><s:property value="#request.username"/>--><s:property value="#request.password"/></span>
</body>
</html></span>
获取的三种方式
1.通过seter和geter方法接受并传递
2.通过ActionContext.getContext().put("username", "flyou");传递參数
3.通过 ServletActionContext.getRequest.setAttribute("","")传值
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