spring 整合web项目（struts2）

一、准备工作

1、创建新的web项目

2、导入jar包

• spring的jar包

  
  
  

  spring的jar包

• sturts2的jar包

  
  
  

  sturts2的jar包

3、创建相应的文件

• 创建Action
• 创建Service

• 创建Dao

  
  
  

  image.png

4、配置spring

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5、配置struts2

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6、配置struts2的过滤器

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二、代码

UserDao.java

package work.zhangdoudou.Dao;

public class UserDao {
    public void addUser() {
        System.out.println("dao----------");
    }
}

UserService.java

package work.zhangdoudou.Service;

import work.zhangdoudou.Dao.UserDao;

public class UserService {
    
    UserDao userDao;
    public void setUserDao(UserDao userDao) {
        this.userDao = userDao;
    }
    public void add() {
        System.out.println("service------");
        userDao.addUser();
    }
}

UserAction.java

package work.zhangdoudou.Action;

import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
import com.opensymphony.xwork2.ActionSupport;
import work.zhangdoudou.Service.UserService;

public class UserAction extends ActionSupport {
    
    @Override
    public String execute() throws Exception {
        System.out.println("Action--------------");
        ApplicationContext context=new ClassPathXmlApplicationContext("applicationContext.xml");
        UserService userService=(UserService)context.getBean("userService");
        userService.add();
        
        return NONE;
    }
}

spring配置applicationContext.xml

struts2配置struts.xml

    
    
            
            
                
                    /index.jsp
                
            

过滤器web.xml

  spring_day02_2SpringStruts2
  
    index.html
    index.htm
    index.jsp
    default.html
    default.htm
    default.jsp
  
  
  
    struts2
    org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter
  
  
    struts2
    /*
  
  

log4j.properties

log4j.rootLogger=info, stdout, R
log4j.appender.stdout=org.apache.log4j.ConsoleAppender
log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
# Pattern to output the caller's file name and line number.
#log4j.appender.stdout.layout.ConversionPattern=%5p [%t] (%F:%L) - %m%n
# Print the date in ISO 8601 format
log4j.appender.stdout.layout.ConversionPattern=%d [%t] %-5p %c - %m%n
log4j.appender.R=org.apache.log4j.RollingFileAppender
log4j.appender.R.File=example.log
log4j.appender.R.MaxFileSize=100KB
# Keep one backup file
log4j.appender.R.MaxBackupIndex=1
log4j.appender.R.layout=org.apache.log4j.PatternLayout
log4j.appender.R.layout.ConversionPattern=%p %t %c - %m%n
# Print only messages of level WARN or above in the package com.foo.
log4j.logger.com.foo=WARN

三、运行结果

image.png

四、分析改良

1、分析：

• 这样的项目每次访问action都要加载spring的配置文件
• 项目运行效率低

2、解决方案

（1）在服务器启动的时候，创建对象加载配置文件
（2）使用底层监听器、servletContext对象

3、spring里面不需要我们自己写代码，已经封装好了

（1）spring封装了一个监听器，只需要配置监听器就可以了
（2）配置监听器之前要导入spring整合web的jar包

jar包

i配置

（3）指定加载spring配置文件的位置

• 不指定会异常
• 默认加载/WEB-INF/applicationContext.xml这个文件
• 我的文件在src下

异常

• 加载配置文件

  
  
  

  web.xml
  
  
  

  image.png

（4）把Action创建交给spring管理

• 导入jar包，这个包struts2提供

  
  
  

  image.png

• spring创建Action

  
  
  

  image.png

• struts2加载创建好的action

  
  
  

  image.png

4、改良后的代码

UserDao.java

package work.zhangdoudou.Dao;

public class UserDao {
    public void addUser() {
        System.out.println("dao----------");
    }
}

UserService.java

package work.zhangdoudou.Service;

import work.zhangdoudou.Dao.UserDao;

public class UserService {
    
    UserDao userDao;
    public void setUserDao(UserDao userDao) {
        this.userDao = userDao;
    }
    public void add() {
        System.out.println("service------");
        userDao.addUser();
    }
}

UserAction.java

public class UserAction extends ActionSupport {
    UserService userService;
    @Override
    public String execute() throws Exception {
        System.out.println("Action--------------");
//      ApplicationContext context=new ClassPathXmlApplicationContext("applicationContext.xml");
//      UserService userService=(UserService)context.getBean("userService");
        
        userService.add();
        
        return NONE;
    }
    public void setUserService(UserService userService) {
        this.userService = userService;
    }
}

applicationContext.xml

struts.xml

    
    
            
            
                
                
                    /index.jsp
                
            

web.xml

  spring_day02_2SpringStruts2
  
    index.html
    index.htm
    index.jsp
    default.html
    default.htm
    default.jsp
  
  
  
  
    org.springframework.web.context.ContextLoaderListener
  
  
  
  
    contextConfigLocation
    classpath:applicationContext.xml
  
   
  
  
    struts2
    org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter
  
  
    struts2
    /*
  
  

log4j.properties

log4j.rootLogger=info, stdout, R
log4j.appender.stdout=org.apache.log4j.ConsoleAppender
log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
# Pattern to output the caller's file name and line number.
#log4j.appender.stdout.layout.ConversionPattern=%5p [%t] (%F:%L) - %m%n
# Print the date in ISO 8601 format
log4j.appender.stdout.layout.ConversionPattern=%d [%t] %-5p %c - %m%n
log4j.appender.R=org.apache.log4j.RollingFileAppender
log4j.appender.R.File=example.log
log4j.appender.R.MaxFileSize=100KB
# Keep one backup file
log4j.appender.R.MaxBackupIndex=1
log4j.appender.R.layout=org.apache.log4j.PatternLayout
log4j.appender.R.layout.ConversionPattern=%p %t %c - %m%n
# Print only messages of level WARN or above in the package com.foo.
log4j.logger.com.foo=WARN

5、运行结果

image.png