Spring--springmvc配线程池Executor做多线程并发操作

偏执的太偏执、 2022-05-31 06:06 423阅读 0赞

## 加载xml文件    ##

在ApplicationContext.xml文件里面添加

**\[java\]** [view plain][] [copy][view plain] [print][view plain] [?][view plain]

1.  xmlns:task="http://www.springframework.org/schema/task"

xmlns:task="http://www.springframework.org/schema/task"

xmlns文件并且xsi:schemaLocation中添加

**\[java\]** [view plain][] [copy][view plain] [print][view plain] [?][view plain]

1.  http://www.springframework.org/schema/task

http://www.springframework.org/schema/task

**\[java\]** [view plain][] [copy][view plain] [print][view plain] [?][view plain]

1.  http://www.springframework.org/schema/task/spring-task.xsd

http://www.springframework.org/schema/task/spring-task.xsd

## 在spring中配置Executor ##

在ApplicationContext.xml文件里面添加

**\[java\]** [view plain][] [copy][view plain] [print][view plain] [?][view plain]

1.  <bean id="taskExecutor" class="org.springframework.scheduling.concurrent.ThreadPoolTaskExecutor">  
2.                 
3.          <property name="corePoolSize" value="$\{task.core\_pool\_size\}" />  
4.              
5.          <property name="maxPoolSize" value="$\{task.max\_pool\_size\}" />  
6.            
7.          <property name="queueCapacity" value="$\{task.queue\_capacity\}" />  
8.            
9.          <property name="keepAliveSeconds" value="$\{task.keep\_alive\_seconds\}" />  
10.     </bean>  
11.       
12.     <task:annotation-driven />

在dbconfig.properties添加

**\[java\]** [view plain][] [copy][view plain] [print][view plain] [?][view plain]

1.  maxOpenPreparedStatements=20  
2.  removeAbandoned=true  
3.  removeAbandonedTimeout=1800  
4.  logAbandoned=true

maxOpenPreparedStatements=20
    removeAbandoned=true
    removeAbandonedTimeout=1800
    logAbandoned=true

这是分别对线程池做配置

## 添加依赖注入 ##

在所需要的service或者controller类里面添加

**\[java\]** [view plain][] [copy][view plain] [print][view plain] [?][view plain]

1.  @Resource(name = "taskExecutor")  
2.  private TaskExecutor taskExecutor;

@Resource(name = "taskExecutor")
    private TaskExecutor taskExecutor;

## 使用线程池进行并发操作 ##

代码如下

**\[java\]** [view plain][] [copy][view plain] [print][view plain] [?][view plain]

1.  taskExecutor.execute(new Runnable() \{  
2.    
3.      @Override  
4.      public void run() \{  
5.          // TODO Auto-generated method stub  
6.          try \{  
7.                                         //要进行的并发操作  
8.          \} catch (Exception e) \{  
9.              // TODO Auto-generated catch block  
10.             e.printStackTrace();  
11.         \}  
12.     \}  
13. \});

taskExecutor.execute(new Runnable() {
    
    				@Override
    				public void run() {
    					// TODO Auto-generated method stub
    					try {
                                              //要进行的并发操作
    					} catch (Exception e) {
    						// TODO Auto-generated catch block
    						e.printStackTrace();
    					}
    				}
    			});

## 提示 ##

注意在线程中操作变量时候变量的作用域范围。需要在这个controller或者sevice中声明变量如下

**\[java\]** [view plain][] [copy][view plain] [print][view plain] [?][view plain]

1.  @Controller  
2.  public class IndexController \{  
3.  int studentscount = 0;  
4.  @RequestMapping(value = "/index.html")  
5.      public ModelAndView goIndex() \{  
6.          logBefore(logger, "列表Center");  
7.          ModelAndView mv = this.getModelAndView();  
8.                  taskExecutor.execute(new Runnable() \{  
9.    
10.                 @Override  
11.                 public void run() \{  
12.                     // TODO Auto-generated method stub  
13.                     // 得到所有学生人数  
14.                     try \{  
15.                                           studentscount = coursesService.getStudentCount(pd);  
16.                     \} catch (Exception e) \{  
17.                         // TODO Auto-generated catch block  
18.                         e.printStackTrace();  
19.                     \}  
20.   
21.                 \}  
22.             \});  
23.                   mv.addObject("studentscount", studentscount);  
24.                   mv.setViewName("common/index");  
25.                   return mv;  
26. ｝

@Controller
    public class IndexController {
    int studentscount = 0;
    @RequestMapping(value = "/index.html")
    	public ModelAndView goIndex() {
    		logBefore(logger, "列表Center");
    		ModelAndView mv = this.getModelAndView();
                    taskExecutor.execute(new Runnable() {
    
    				@Override
    				public void run() {
    					// TODO Auto-generated method stub
    					// 得到所有学生人数
    					try {
                                              studentscount = coursesService.getStudentCount(pd);
    					} catch (Exception e) {
    						// TODO Auto-generated catch block
    						e.printStackTrace();
    					}
    
    				}
    			});
                      mv.addObject("studentscount", studentscount);
                      mv.setViewName("common/index");
                      return mv;
    ｝

[view plain]: http://blog.csdn.net/qq_24046745/article/details/52816584#