Spring与Struts2 的整合使用

悠悠 2021-09-29 15:24 307阅读 0赞

# Spring与Struts2 的整合使用 #

项目结构

![1279526-20180119101335709-244375292.png][]

> 再Struts2 中(还没有与Spring整合时)，它创建Action类的依据
> 
>     <action name="second" class="com.SecondController">
>      　　<result name="success">/index.jsp</result>
>      </action>
> 
> 同时还有一个点需要注意的就是，struts会每次请求时自动实例化一个新的Action类的对象

导进相关的依赖包：pom.xml

1 <?xml version="1.0" encoding="UTF-8"?>
     2 <project xmlns="http://maven.apache.org/POM/4.0.0"
     3          xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
     4          xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
     5     <modelVersion>4.0.0</modelVersion>
     6 
     7     <groupId>com</groupId>
     8     <artifactId>spring-web-struts2</artifactId>
     9     <version>1.0-SNAPSHOT</version>
    10     
    11     <packaging>war</packaging>
    12 
    13     <dependencies>
    14         <dependency>
    15             <groupId>javax.servlet</groupId>
    16             <artifactId>javax.servlet-api</artifactId>
    17             <version>3.1.0</version>
    18             <scope>provided</scope>
    19         </dependency>
    20 
    21         <dependency>
    22             <groupId>org.springframework</groupId>
    23             <artifactId>spring-context</artifactId>
    24             <version>5.0.2.RELEASE</version>
    25         </dependency>
    26         <dependency>
    27             <groupId>org.springframework</groupId>
    28             <artifactId>spring-web</artifactId>
    29             <version>5.0.2.RELEASE</version>
    30         </dependency>
    31 
    32 
    33         <dependency>
    34             <groupId>org.apache.struts</groupId>
    35             <artifactId>struts2-core</artifactId>
    36             <version>2.5.12</version>
    37         </dependency>
    38 
    39         <dependency>
    40             <groupId>org.apache.struts</groupId>
    41             <artifactId>struts2-spring-plugin</artifactId>
    42             <version>2.5.12</version>
    43         </dependency>
    44     </dependencies>
    45 
    46     <build>
    47         <plugins>
    48             <plugin>
    49                 <artifactId>maven-war-plugin</artifactId>
    50                 <version>2.2</version>
    51                 <configuration>
    52                     <warSourceDirectory>web</warSourceDirectory>
    53                 </configuration>
    54             </plugin>
    55         </plugins>
    56     </build>
    57 </project>

struts2 与spring整合的步骤

1：配置监听器ContextLoaderListener，以便创建出Spring的容器对象web.xml

1 <?xml version="1.0" encoding="UTF-8"?>
     2 <web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"
     3          xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
     4          xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd"
     5          version="3.1">
     6     
     7     <listener>
     8         <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
     9     </listener>
    10     
    11     <context-param>
    12         <param-name>contextConfigLocation</param-name>
    13         <param-value>classpath:applicationCtx.xml</param-value>
    14     </context-param>
    15     
    16     
    17     <filter>
    18         <filter-name>sss</filter-name>
    19         <filter-class>org.apache.struts2.dispatcher.filter.StrutsPrepareAndExecuteFilter</filter-class>
    20     </filter>
    21     <filter-mapping>
    22         <filter-name>sss</filter-name>
    23         <url-pattern>/*</url-pattern>
    24     </filter-mapping>
    25 </web-app>

2：添加struts-spring的依赖，以便改变默认的Struts的实例化Action类规则（上面已配置）

1.  因为读取到的值就是bean的名字
2.  利用WebApplicationContextUtils的方法就可以实例化action类
3.  实例化action类的时候，就可以注入依赖的Service类型

1     <dependency>
    2             <groupId>org.apache.struts</groupId>
    3             <artifactId>struts2-spring-plugin</artifactId>
    4             <version>2.5.12</version>
    5         </dependency>

创建UserDao接口

1 package dao;
    2 
    3 public interface UserDao {
    4     void insert();
    5 }

实现UserDao：UserDaoImpl

1 package dao;
    2 
    3 public class UserDaoImpl implements UserDao {
    4     public void insert() {
    5         System.out.println("dao insert----");
    6     }
    7 }

创建UserService接口

1 package service;
    2 
    3 public interface UserService {
    4     void insert();
    5 }

UserServiceImpl

1 package service;
     2 
     3 import dao.UserDao;
     4 
     5 public class UserServiceImpl implements UserService {
     6     private UserDao userDao ;
     7 
     8     public UserDao getUserDao() {
     9         return userDao;
    10     }
    11 
    12     public void setUserDao(UserDao userDao) {
    13         this.userDao = userDao;
    14     }
    15 
    16     public void insert() {
    17         userDao.insert();
    18     }
    19 }

把UserDaoImpl和UserServiceImpl让Spring管理：applicationCtx.xml

1 <?xml version="1.0" encoding="UTF-8"?>
     2 <beans xmlns="http://www.springframework.org/schema/beans"
     3        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
     4        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
     5 
     6 
     7     <bean id="userDao" class="dao.UserDaoImpl"></bean>
     8     <bean id="userService" class="service.UserServiceImpl">
     9         <property name="userDao" ref="userDao"></property>
    10     </bean>
    11 
    12     
    13     <bean id="sencondController" class="com.SecondController"  scope="prototype">
    14         <property name="userService" ref="userService"></property>
    15     </bean>
    16 </beans>

配置struts并且让Spring管理

1 <?xml version="1.0" encoding="UTF-8"?>
     2 
     3 <!DOCTYPE struts PUBLIC
     4         "-//Apache Software Foundation//DTD Struts Configuration 2.5//EN"
     5         "http://struts.apache.org/dtds/struts-2.5.dtd">
     6 
     7 <struts>
     8 
     9     <package name="demo" extends="struts-default">
    10         <action name="second" class="sencondController">
    11             <result name="success">/index.jsp</result>
    12         </action>
    13     </package>
    14 </struts>

![1279526-20180119104041865-1453610424.png][]

SecondController

1 package com;
     2 
     3 import service.UserService;
     4 
     5 public class SecondController {
     6 
     7 
     8     public SecondController() {
     9         System.out.println("second contructor-----");
    10     }
    11 
    12     private UserService userService;
    13 
    14     public UserService getUserService() {
    15         return userService;
    16     }
    17 
    18     public void setUserService(UserService userService) {
    19         this.userService = userService;
    20     }
    21 
    22     public  String execute(){
    23         System.out.println("execute----");
    24         userService.insert();
    25         return "success";
    26     }
    27 
    28 
    29 }

个人笔记，请勿喷

转载于:https://www.cnblogs.com/sunduge/p/8315615.html

[1279526-20180119101335709-244375292.png]: /images/20210725/68e3dce519474ae292c618547fef3ef8.png
[1279526-20180119104041865-1453610424.png]: /images/20210725/e35dbc7a43904ce4a3b587fe11d83cc5.png