[JavaWeb基础] 018.Struts2 Action通配符使用

Struts2中有一个很牛逼的action通配符，可以用来简化action配置，以我们将要讲解的案例来说，如果我们要对一个学生信息进行增加，删除，修改，那么按照原来的做法，我们需要写3个Action来配置:student_add，student_update，student_del。那么我们容易发现它们可以提取共同的前缀student_，这样我们就可以配置下通配符，把后面的东西弄成变量，那么我们就只要配置一个action就可以了。

1.首先编写我们的Action类

package com.babybus.sdteam.action;

import java.sql.SQLException;
import java.util.List;

import com.babybus.sdteam.dao.StudentHibernateDao;
import com.babybus.sdteam.vo.Student;
import com.opensymphony.xwork2.Action;
import com.opensymphony.xwork2.ActionSupport;

public class ManageStudentAction extends ActionSupport implements Action {

	private static final long serialVersionUID = 1L;
	private String studentname;
	private Integer age;
	private String classname;
	private Integer userid;
	private String username;
    private List<Student> resultList;

	public String getStudentname() {
		return studentname;
	}

	public void setStudentname(String studentname) {
		this.studentname = studentname;
	}

	public Integer getAge() {
		return age;
	}

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

	public String getClassname() {
		return classname;
	}

	public void setClassname(String classname) {
		this.classname = classname;
	}

	public Integer getUserid() {
		return userid;
	}

	public void setUserid(Integer userid) {
		this.userid = userid;
	}

	public String getUsername() {
		return username;
	}

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

	public List<Student> getResultList() {
		return resultList;
	}

	public void setResultList(List<Student> resultList) {
		this.resultList = resultList;
	}

	/**
	 * 获取条件
	 * @param method
	 * @return
	 */
	private Student getCondition(String method)
	{
		Student result = new Student();
        if(!"del".equals(method))
        {
            result.setStudentname(this.studentname);
            result.setAge(this.age);
            result.setClassname(this.classname);
        }

        if("update".equals(method))
        {
        	result.setId(this.userid);
        }

		return result;
	}

	/**
	 * 增加信息
	 * @throws SQLException
	 */
	public String studentadd() throws SQLException
	{
		Student condition = getCondition("add");
		StudentHibernateDao dao = new StudentHibernateDao();
		dao.insertStudent(condition);

		// 查询结果集合
		resultList = dao.queryStudent(null);
		return SUCCESS;
	}

	/**
	 * 修改信息
	 * @throws SQLException
	 */
	public String studentupdate() throws SQLException
	{
		Student condition = getCondition("update");
		StudentHibernateDao dao = new StudentHibernateDao();
		dao.updateStudent(condition);

		// 查询结果集合
		resultList = dao.queryStudent(null);
		return SUCCESS;
	}

	/**
	 * 删除信息
	 * @throws SQLException
	 */
	public String studentdel() throws SQLException
	{
		StudentHibernateDao dao = new StudentHibernateDao();
		dao.deleteStudent(this.userid);

		// 查询结果集合
		resultList = dao.queryStudent(null);
		return SUCCESS;
	}
}

2.配置我们的struts.xml

<action name="student_*" class="com.babybus.sdteam.action.ManageStudentAction" method="student{1}">
    <result name="success">/UserList.jsp</result>
</action>

3.前端调用

<form action="student_add.action" method="post" >
<form action="student_update.action" method="post" >
<a href="student_del.action?userid=${student.id}" onclick="return confirm('确定要删除么？')" }>删除</a></td>

4.这样我们就可以用通配符节省很多action的配置了

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转载自【宝宝巴士SuperDo团队】 原文链接: http://www.cnblogs.com/superdo/p/4808043.html