Struts2 ---- 一些小总结

梦里梦外; 2022-06-02 00:51 195阅读 0赞

最近对Struts2做了一些小总结，也不算全面，总的来说也算还行；关于Struts2还有很多的知识点，我也没有完全掌握，目前也就把我会的一些给帖出来，也还请大家多多指点

项目结构：  
![这里写图片描述][SouthEast]  
  
  
  
web.xml

<?xml version="1.0" encoding="UTF-8"?>
    <web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd" version="3.1">
    
        
        
        <filter>
            <filter-name>struts2</filter-name>
            <filter-class>org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter</filter-class>
        </filter>
        <filter-mapping>
            <filter-name>struts2</filter-name>
            
            <url-pattern>/*</url-pattern>
        </filter-mapping>
    
    
    
    </web-app>

struts.xml

<?xml version="1.0" encoding="UTF-8"?>
    
    <!DOCTYPE struts PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 2.3//EN" "http://struts.apache.org/dtds/struts-2.3.dtd">
    
    <struts>
        
        <constant name="struts.action.excludePattern" value="/static/.*?"/>
    
        
           
        
    
        
        
    
        
        
    
        
        
    
        
            
        
    
        
        
    
        
        
    
        
        
    
        
        
    
        
        
    
        
        
    
        
            
        
    
        
        
    
        
        
    
        
        
    
        
        
    
        
        
    
        
        
    
        
        
    
        
        
    
        
        
    
        
        
    
        
        
    
        
        
    
        
        
    
        
        
        
    
        
        
    
        
        
    
        
        
    </struts>

TestAction.java

package action;
    
    import com.opensymphony.xwork2.ActionSupport;
    import entity.Company;
    import org.apache.struts2.convention.annotation.*;
    
    /** * @author Ming * @date 2017/12/22 16:14 */
    
    /** * ActionSupport这个工具类在实现了Action的基础方法上还定义了很多方法，如数据校验、国际化支持等。 * @ParentPackage：指定action所处的父包名，一般为struts-default(action的结果类型为json; 那么就需要继承json-default包@ParentPackage("json-default")) * @Namespace：URL命名空间 localhost:8080/TestStruts/process.action；列：(@Namespace("/test") :localhost:8080/TestStruts/test/process.action ) * @ResultPath：结果视图基路径 @ResultPath("/WEB-INF/content/") 那么我们在@Result(location = "ok.jsp"),访问的页面就将是/WEB-INF/content/ok.jsp ；@Result(location = "/ok.jsp")加斜杠的话@ResultPath将会无效,则可以不写 */
    @ParentPackage("struts-default")
    @Namespace("/")
    @ResultPath("/WEB-INF/content/")
    public class TestAction extends ActionSupport { 
    // 为其提供get set 方法 ;其余类型也大致一样，这里只是举例
        private String username;
        private Company company;
    
        /** * SUCCESS、LOGIN、INPUT、ERROR、NONE 只是5个标准返回值 , 当然我们可以自己随意定义返回的名字； * @Action:指定访问URL value : url results : Result注解列表 * @Result ： 提供了Action结果的映射。（一个结果的映射） * @Result(name = "login" ,type = "dispatcher", location = "no.jsp") : name : 匹配返回值 type： dispatcher(转发)，redirect(重定向)，chain(action链)，redirectAction(重定向到一个action) ；location：映射页面 * params传参 : http://blog.csdn.net/awen_c/article/details/26499019;http://blog.csdn.net/z69183787/article/details/16342553 */
        @Action(value = "process", results = {
                @Result(location = "ok.jsp"),
                @Result(name = "login" ,type = "dispatcher", location = "no.jsp")
        })
        public String execute(){
            if (username.equals("小明") && company.getDeptName().equals("销售部")){
                System.out.println(username);
                System.out.println(company.getDeptName());
                return SUCCESS;
            }
            System.out.println(username);
            System.out.println(company.getDeptName());
            return LOGIN;
        }
    
        public String getUsername() {
            return username;
        }
    
        public void setUsername(String username) {
            this.username = username;
        }
    
        public Company getCompany() {
            return company;
        }
    
        public void setCompany(Company company) {
            this.company = company;
        }
    }

Company.java

package entity;
    
    /** * @author Ming * @date 2017/12/22 16:35 * POJO */
    public class Company { 
        private int deptId;
        private String deptName;
        private int empId;
        private String empName;
    
        public int getDeptId() {
            return deptId;
        }
    
        public void setDeptId(int deptId) {
            this.deptId = deptId;
        }
    
        public String getDeptName() {
            return deptName;
        }
    
        public void setDeptName(String deptName) {
            this.deptName = deptName;
        }
    
        public int getEmpId() {
            return empId;
        }
    
        public void setEmpId(int empId) {
            this.empId = empId;
        }
    
        public String getEmpName() {
            return empName;
        }
    
        public void setEmpName(String empName) {
            this.empName = empName;
        }
    }

index.jsp

<%-- Created by IntelliJ IDEA. User: Ming Date: 2017/12/22 Time: 15:55 To change this template use File | Settings | File Templates. --%>
    <%@ page contentType="text/html;charset=UTF-8" language="java" %>
    
    <% String path = request.getContextPath(); String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/"; %>
    
    <html>
      <head>
        <base href="<%=basePath%>">
        <title>$Title$</title>
      </head>
      <body>
        <form action="process.action" method="post">
          姓名：<input type="text" name="username" value="${username}"><br>
          部门：<input type="text" name="company.deptName" value="${company.deptName}"><br>
          <input type="submit" value="提交">
        </form>
      </body>
    </html>

ok.jsp

<%-- Created by IntelliJ IDEA. User: Ming Date: 2017/12/22 Time: 17:31 To change this template use File | Settings | File Templates. --%>
    <%@ page contentType="text/html;charset=UTF-8" language="java" %>
    
    <% String path = request.getContextPath(); String basePath = request.getScheme() + "://" + request.getServerName() + ":" + request.getServerPort() + path + "/"; %>
    
    <html>
    <head>
        <base href="<%=basePath%>">
        <title>OK页面</title>
    </head>
    <body>
    姓名：<input type="text" name="username" value="${username}"><br>
    部门：<input type="text" name="company.deptName" value="${company.deptName}"><br>
    </body>
    </html>

no.jsp

<%-- Created by IntelliJ IDEA. User: Ming Date: 2017/12/22 Time: 17:31 To change this template use File | Settings | File Templates. --%>
    <%@ page contentType="text/html;charset=UTF-8" language="java" %>
    
    <% String path = request.getContextPath(); String basePath = request.getScheme() + "://" + request.getServerName() + ":" + request.getServerPort() + path + "/"; %>
    
    <html>
    <head>
        <base href="<%=basePath%>">
        <title>NO页面</title>
    </head>
    <body>
    姓名：<input type="text" name="username" value="${username}"><br>
    部门：<input type="text" name="company.deptName" value="${company.deptName}"><br>
    </body>
    </html>

[关于Struts2文件上传请点击这里][Struts2]

[SouthEast]: /images/20220602/02035c488cdd4dff966a9e161933ea80.png
[Struts2]: http://blog.csdn.net/qq_38637558/article/details/78017692