本文共 5011 字，大约阅读时间需要 16 分钟。

1、搭建Struts2基本环境

1.1、导入Strust2 Jar包我使用Strust2.3

1.2、配置web.xml文件

   
   	
    		
     
      Struts2
     		
     
      org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter
     	
    	
    		
     
      Struts2
     		
     
      /*
     	
    	
    		
     
      index.jsp
     	
    
   

2、编写一个Dao类进行数据访问(为了方面直接不进行连接数据库，从Map进行读取)。

package com.splend.struts2.crud;import java.util.ArrayList;import java.util.HashMap;import java.util.List;import java.util.Map;/** * @author Splendid * */public class Dao {		private static Map
   
     emps = new HashMap
    
     ();	static {		emps.put(1001, new Employee(1001, "AA", "aa", "aa@splend.com"));		emps.put(1002, new Employee(1002, "BB", "bb", "bb@splend.com"));		emps.put(1003, new Employee(1003, "CC", "cc", "cc@splend.com"));		emps.put(1004, new Employee(1004, "DD", "dd", "dd@splend.com"));		emps.put(1005, new Employee(1005, "EE", "ee", "ee@splend.com"));		emps.put(1006, new Employee(1006, "FF", "ff", "ff@splend.com"));	}	public void save(Employee emp) {		long time = System.currentTimeMillis();		emp.setEmployeeId(((int) (time))%100+1007);		emps.put(emp.getEmployeeId(), emp);	}	public List
     
       getEmployees() {		return new ArrayList<>(emps.values());	}	public void delete(Integer employeeId) {		emps.remove(employeeId);	}	public Employee get(Integer empId) {		return emps.get(empId);	}	public void update(Employee emp) {		emps.put(emp.getEmployeeId(), emp);	}}
     
    
   

Employee.java:

package com.splend.struts2.crud;public class Employee {	private Integer employeeId;	private String firstName;	private String lastName;	private String email;	public Employee() {	}	public Employee(Integer employeeId, String firstName, String lastName, String email) {		super();		this.employeeId = employeeId;		this.firstName = firstName;		this.lastName = lastName;		this.email = email;	}	public Integer getEmployeeId() {		return employeeId;	}	public void setEmployeeId(Integer employeeId) {		this.employeeId = employeeId;	}	public String getFirstName() {		return firstName;	}	public void setFirstName(String firstName) {		this.firstName = firstName;	}	public String getLastName() {		return lastName;	}	public void setLastName(String lastName) {		this.lastName = lastName;	}	public String getEmail() {		return email;	}	public void setEmail(String email) {		this.email = email;	}}

4、编写EmployeeAction

EmployeeAction.java

package com.splend.struts2.crud;import java.util.Map;import org.apache.struts2.interceptor.RequestAware;import com.opensymphony.xwork2.ModelDriven;import com.opensymphony.xwork2.Preparable;public class EmployeeAction implements RequestAware, ModelDriven
   
    , Preparable {	private Dao dao = new Dao();	private Employee employee;	public String edit() {		return "edit";	}	public void prepareEdit() {		employee = dao.get(employeeId);	}	public String update() {		dao.update(employee);		return "success";	}	public void prepareUpdate() {		employee = new Employee();	}	public String save() {		dao.save(employee);		return "success";	}	public void prepareSave() {		employee = new Employee();	}	public String delete() {		dao.delete(employeeId);		return "success";	}	public String list() {		requset.put("emps", dao.getEmployees());		return "list";	}	private Map
    
      requset;	private Integer employeeId;	public void setEmployeeId(Integer employeeId) {		this.employeeId = employeeId;	}	/**	 * 获取Request对象的方式，这里选择实现RequestAware接口。	 */	@Override	public void setRequest(Map
     
       request) {		this.requset = request;		// ServletActionContext.getRequest()紧耦合的获取方式，获取的是HttpServletRequest对象		// 获取的是Map
      
       对象		// ActionContext.getContext().get("request");	}	/**	 * 使用ModelDriven把employee对象放到值栈栈顶。	 */	@Override	public Employee getModel() {		return employee;	}	@Override	public void prepare() throws Exception {		// TODO Auto-generated method stub	}}
      
     
    
   

<%@ page language="java" contentType="text/html; charset=UTF-8"	pageEncoding="UTF-8"%><%@ taglib prefix="s" uri="/struts-tags"%>
   	
   	
   		
    		
    		
    		
    	
   	
   				
   
   
		    
			     
				      
ID
				      
FirstName
				      
LastName
				      
Email
				      
Edit
				      
Delete
			     
		    
		    
			     
					      
${employeeId }
					      
${firstName }
					      
${lastName }
					      
${email }
					      
Edit
					      
Delete
				     
					    
	   

<%@ page language="java" contentType="text/html; charset=UTF-8"	pageEncoding="UTF-8"%><%@ taglib prefix="s" uri="/struts-tags"%>
   	
   		
    		
    		
    		
    		
    	
   

6、src下创建一个struts.xml

   
   	
    	
    		
     			
      				
       					
        false				
       			
      		
     		
     		
     			
      
       emp-list
      			
      
       /emp-{1}.jsp
      		
     	
    
   

<%@ page language="java" contentType="text/html; charset=UTF-8"    pageEncoding="UTF-8"%>
   	List All Employees