1,Struts2处理传入多值;
1.1,处理数目不定的字符串时;
这里我们采用的是字符串类型来接受;
hobby.jsp页面:
代码语言:javascript复制<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!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>
<form action="hobby" method="post">
爱好:
<input type="checkbox" name="hobby" value="唱歌"/>唱歌
<input type="checkbox" name="hobby" value="跳舞"/>跳舞
<input type="checkbox" name="hobby" value="睡觉"/>睡觉
<input type="checkbox" name="hobby" value="玩CF"/>玩CF
<input type="submit" value="提交"/>
</form>
</body>
</html>
struts.xml:
代码语言:javascript复制<action name="hobby" class="com.java.action.HobbyAction">
<result name="success">success.jsp</result>
<result name="error">error.jsp</result>
</action>
处理类HobbyAction:
代码语言:javascript复制package com.java.action;
import com.opensymphony.xwork2.ActionSupport;
public class HobbyAction extends ActionSupport {
private String[] hobby;
public String[] getHobby() {
return hobby;
}
public void setHobby(String[] hobby) {
this.hobby = hobby;
}
@Override
public String execute() throws Exception {
System.out.println("默认执行了User方法");
for(String h:hobby){
System.out.println(h);
}
return SUCCESS;
}
}
运行之后,会发现后台可以获取!
点击提交之后,后台可以获取:
1.2,处理数目不定的javabean对象时,
这里采用对象列表的形式来接受数据;
student.jsp:
代码语言:javascript复制<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!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>
<form action="student" method="post">
<table>
<tr>
<th>姓名</th>
<th>性别</th>
<th>年龄</th>
</tr>
<tr>
<td><input type="text" name="students[0].name"/></td>
<td><input type="text" name="students[0].sex"/></td>
<td><input type="text" name="students[0].age"/></td>
</tr>
<tr>
<td><input type="text" name="students[1].name"/></td>
<td><input type="text" name="students[1].sex"/></td>
<td><input type="text" name="students[1].age"/></td>
</tr>
<tr>
<td colspan="3">
<input type="submit" value="提交"/>
</td>
</tr>
</table>
</form>
</body>
</html>
struts.xml:
代码语言:javascript复制<action name="student" class="com.java.action.StudentAction">
<result name="success">success.jsp</result>
<result name="error">error.jsp</result>
</action>
处理类StudentAction:
代码语言:javascript复制package com.java.action;
import com.java.model.Student;
import com.opensymphony.xwork2.ActionSupport;
import java.util.List;
public class StudentAction extends ActionSupport {
private List<Student> students;
public List<Student> getStudents() {
return students;
}
public void setStudents(List<Student> students) {
this.students = students;
}
@Override
public String execute() throws Exception {
System.out.println("默认执行了User方法");
for(Student s:students){
System.out.println(s);
}
return SUCCESS;
}
}
javabean对象:
代码语言:javascript复制package com.java.model;
public class Student {
private String name;
private String sex;
private int age;
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getSex() {
return sex;
}
public void setSex(String sex) {
this.sex = sex;
}
public int getAge() {
return age;
}
public void setAge(int age) {
this.age = age;
}
@Override
public String toString() {
return "Student [name=" name ", sex=" sex ", age=" age "]";
}
}
运行界面:
2,Struts.xml配置文件;
2.1,package配置;
name:包名 extends:继承 namespaces:包命名空间 abstract:抽象包
这里的namespaces是指我们在输入请求时,可以多加一层访问请求路径;
先写两个处理类:
ForeStudent:
代码语言:javascript复制package com.java.action;
import com.opensymphony.xwork2.ActionSupport;
public class ForeStudent extends ActionSupport {
@Override
public String execute() throws Exception {
System.out.println("默认执行了fore方法");
return SUCCESS;
}
}
BackStudent:
代码语言:javascript复制package com.java.action;
import com.opensymphony.xwork2.ActionSupport;
public class BackStudent extends ActionSupport {
@Override
public String execute() throws Exception {
System.out.println("默认执行了back方法");
return SUCCESS;
}
}
struts.xml配置:
代码语言:javascript复制<package name="foreground" namespace="/fore" extends="struts-default">
<action name="studentList" class="com.java.action.ForeStudent">
<result name="success">${pageContext.request.contextPath}/success.jsp</result>
<result name="error">error.jsp</result>
</action>
</package>
<package name="background" namespace="/back" extends="struts-default">
<action name="studentList" class="com.java.action.BackStudent">
<result name="success">${pageContext.request.contextPath}/success.jsp</result>
<result name="error">error.jsp</result>
</action>
</package>
运行结果:
我们需要多加一个/fore路径
2.2,action配置;
代码语言:javascript复制name:action名 class:处理类 method:方法
<action name="studentList" class="com.java.action.ForeStudent" method="show">
<result name="success">${pageContext.request.contextPath}/success.jsp</result>
<result name="error">error.jsp</result>
</action>
struts2默认给我们执行的是execute()方法,而当我们想执行掐方法时,就可以用method,其中属性写上我们想要调用的方法就可以了!