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Mysql 插入查询抱怨 >= not valid at this position 错误（mysql查询报错2014）

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本篇文章给大家谈谈Mysql插入查询抱怨>=notvalidatthisposition错误，以及mysql查询报错2014的知识点，同时本文还将给你拓展1.0MySQL常见错误【Thisfuncti

本篇文章给大家谈谈Mysql 插入查询抱怨 >= not valid at this position 错误，以及mysql查询报错2014的知识点，同时本文还将给你拓展1.0MySQL 常见错误【This function has none of DETERMINISTIC, NO SQL, or READS SQL DATA】、com.mysql.jdbc.integration.jboss.MysqlValidConnectionChecker的实例源码、Druid 连接mysql 报skip not validate connection、Evaluate the value of an arithmetic expression in Reverse Polish Notation. Valid operators are+,-,*,/. Each operand may be an integer or another expression. Some examples:等相关知识，希望对各位有所帮助，不要忘了收藏本站喔。

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Mysql 插入查询抱怨 >= not valid at this position 错误（mysql查询报错2014）

Mysql 插入查询抱怨 >= not valid at this position 错误（mysql查询报错2014）

如何解决Mysql 插入查询抱怨 >= not valid at this position 错误？

我曾经运行一个 MysqL 查询来在 db 中插入数据，一切都过去正常工作。几个月后我现在是同样的查询，它给出了一个错误：

>= is not valid at this position,expecting : EOF,'';''

下面是我尝试运行的 sql 查询，但在附近出现错误

start_time >= 36000000

INSERT INTO `expert_slots` (`expert_id`,`slot_id`,`is_active`,`created_at`,`updated_at`) 
SELECT 449 as `expert_id`,id as `slot_id`,1 as `is_active`,unix_timestamp(Now())*1000 as `created_at`,unix_timestamp(Now())*1000 as `updated_at` 
FROM slots WHERE `start_time` >= 36000000 and end_time <= 68400000 and day in (''MON'',''TUE'',''WED'',''THU'',''FRI'');

谁能帮我理解这里的错误是什么？

我正在MysqL工作台中运行代码

解决方法

暂无找到可以解决该程序问题的有效方法，小编努力寻找整理中！

如果你已经找到好的解决方法，欢迎将解决方案带上本链接一起发送给小编。

小编邮箱:dio#foxmail.com (将#修改为@）

1.0MySQL 常见错误【This function has none of DETERMINISTIC, NO SQL, or READS SQL DATA】

1.0MySQL 常见错误【This function has none of DETERMINISTIC, NO SQL, or READS SQL DATA】

解决方案：
set global log_bin_trust_function_creators=TRUE;

com.mysql.jdbc.integration.jboss.MysqlValidConnectionChecker的实例源码

com.mysql.jdbc.integration.jboss.MysqlValidConnectionChecker的实例源码

项目：the-vigilantes    文件：DataSourceRegressionTest.java    
/**
 * Tests fix for BUG#20242 - MysqLValidConnectionChecker for JBoss doesn't
 * work with MysqLXADataSources.
 * 
 * @throws Exception
 *             if the test fails.
 */
public void testBug20242() throws Exception {
    if (versionMeetsMinimum(5,0)) {
        try {
            Class.forName("org.jboss.resource.adapter.jdbc.ValidConnectionChecker");
        } catch (Exception ex) {
            System.out.println("The testBug20242() is ignored because required class isn't available:");
            ex.printstacktrace();
            return; // class not available for testing
        }

        MysqLXADataSource xaDs = new MysqLXADataSource();
        xaDs.setUrl(dbUrl);

        MysqLValidConnectionChecker checker = new MysqLValidConnectionChecker();
        assertNull(checker.isValidConnection(xaDs.getXAConnection().getConnection()));
    }
}
项目：OpenVertretung    文件：DataSourceRegressionTest.java    
/**
 * Tests fix for BUG#20242 - MysqLValidConnectionChecker for JBoss doesn't
 * work with MysqLXADataSources.
 * 
 * @throws Exception
 *             if the test fails.
 */
public void testBug20242() throws Exception {
    if (versionMeetsMinimum(5,0)) {
        try {
            Class.forName("org.jboss.resource.adapter.jdbc.ValidConnectionChecker");
        } catch (Exception ex) {
            System.out.println("The testBug20242() is ignored because required class isn't available:");
            ex.printstacktrace();
            return; // class not available for testing
        }

        MysqLXADataSource xaDs = new MysqLXADataSource();
        xaDs.setUrl(dbUrl);

        MysqLValidConnectionChecker checker = new MysqLValidConnectionChecker();
        assertNull(checker.isValidConnection(xaDs.getXAConnection().getConnection()));
    }
}
项目：ProyectoPacientes    文件：DataSourceRegressionTest.java    
/**
 * Tests fix for BUG#20242 - MysqLValidConnectionChecker for JBoss doesn't
 * work with MysqLXADataSources.
 * 
 * @throws Exception
 *             if the test fails.
 */
public void testBug20242() throws Exception {
    if (versionMeetsMinimum(5,0)) {
        try {
            Class.forName("org.jboss.resource.adapter.jdbc.ValidConnectionChecker");
        } catch (Exception ex) {
            System.out.println("The testBug20242() is ignored because required class isn't available:");
            ex.printstacktrace();
            return; // class not available for testing
        }

        MysqLXADataSource xaDs = new MysqLXADataSource();
        xaDs.setUrl(dbUrl);

        MysqLValidConnectionChecker checker = new MysqLValidConnectionChecker();
        assertNull(checker.isValidConnection(xaDs.getXAConnection().getConnection()));
    }
}
项目：BibliotecaPS    文件：DataSourceRegressionTest.java    
/**
 * Tests fix for BUG#20242 - MysqLValidConnectionChecker for JBoss doesn't
 * work with MysqLXADataSources.
 * 
 * @throws Exception
 *             if the test fails.
 */
public void testBug20242() throws Exception {
    if (versionMeetsMinimum(5,0)) {
        try {
            Class.forName("org.jboss.resource.adapter.jdbc.ValidConnectionChecker");
        } catch (Exception ex) {
            System.out.println("The testBug20242() is ignored because required class isn't available:");
            ex.printstacktrace();
            return; // class not available for testing
        }

        MysqLXADataSource xaDs = new MysqLXADataSource();
        xaDs.setUrl(dbUrl);

        MysqLValidConnectionChecker checker = new MysqLValidConnectionChecker();
        assertNull(checker.isValidConnection(xaDs.getXAConnection().getConnection()));
    }
}
项目：Geometry-wars    文件：DataSourceRegressionTest.java    
/**
 * Tests fix for BUG#20242 - MysqLValidConnectionChecker for JBoss doesn't
 * work with MysqLXADataSources.
 * 
 * @throws Exception
 *             if the test fails.
 */
public void testBug20242() throws Exception {
    if (versionMeetsMinimum(5,0)) {
        try {
            Class.forName("org.jboss.resource.adapter.jdbc.ValidConnectionChecker");
        } catch (Exception ex) {
            System.out.println("The testBug20242() is ignored because required class isn't available:");
            ex.printstacktrace();
            return; // class not available for testing
        }

        MysqLXADataSource xaDs = new MysqLXADataSource();
        xaDs.setUrl(dbUrl);

        MysqLValidConnectionChecker checker = new MysqLValidConnectionChecker();
        assertNull(checker.isValidConnection(xaDs.getXAConnection().getConnection()));
    }
}
项目：TPKB    文件：DataSourceRegressionTest.java    
/**
 * Tests fix for BUG#20242 - MysqLValidConnectionChecker for JBoss doesn't
 * work with MysqLXADataSources.
 * 
 * @throws Exception
 *             if the test fails.
 */
public void testBug20242() throws Exception {
    if (versionMeetsMinimum(5,0)) {
        try {
            Class.forName("org.jboss.resource.adapter.jdbc.ValidConnectionChecker");
        } catch (Exception ex) {
            return; // class not available for testing
        }

        MysqLXADataSource xaDs = new MysqLXADataSource();
        xaDs.setUrl(dbUrl);

        MysqLValidConnectionChecker checker = new MysqLValidConnectionChecker();
        assertNull(checker.isValidConnection(xaDs.getXAConnection().getConnection()));
    }
}
项目：cloudera-cli-scripts    文件：DataSourceRegressionTest.java    
/**
 * Tests fix for BUG#20242 - MysqLValidConnectionChecker for JBoss doesn't
 * work with MysqLXADataSources.
 * 
 * @throws Exception
 *             if the test fails.
 */
public void testBug20242() throws Exception {
    if (versionMeetsMinimum(5,0)) {
        try {
            Class.forName("org.jboss.resource.adapter.jdbc.ValidConnectionChecker");
        } catch (Exception ex) {
            return; // class not available for testing
        }

        MysqLXADataSource xaDs = new MysqLXADataSource();
        xaDs.setUrl(dbUrl);

        MysqLValidConnectionChecker checker = new MysqLValidConnectionChecker();
        assertNull(checker.isValidConnection(xaDs.getXAConnection().getConnection()));
    }
}
项目：fil_project_mgmt_app_v2    文件：DataSourceRegressionTest.java    
/**
 * Tests fix for BUG#20242 - MysqLValidConnectionChecker for JBoss doesn't
 * work with MysqLXADataSources.
 * 
 * @throws Exception if the test fails.
 */
public void testBug20242() throws Exception {
    if (versionMeetsMinimum(5,0)) {
        try {
            Class.forName("org.jboss.resource.adapter.jdbc.ValidConnectionChecker");
        } catch (Exception ex) {
            return; // class not available for testing
        }

        MysqLXADataSource xaDs = new MysqLXADataSource();
        xaDs.setUrl(dbUrl);

        MysqLValidConnectionChecker checker = new MysqLValidConnectionChecker();
        assertNull(checker.isValidConnection(xaDs.getXAConnection().getConnection()));
    }   
}
项目：SMPT42    文件：DataSourceRegressionTest.java    
/**
 * Tests fix for BUG#20242 - MysqLValidConnectionChecker for JBoss doesn't
 * work with MysqLXADataSources.
 * 
 * @throws Exception
 *             if the test fails.
 */
public void testBug20242() throws Exception {
    if (versionMeetsMinimum(5,0)) {
        try {
            Class.forName("org.jboss.resource.adapter.jdbc.ValidConnectionChecker");
        } catch (Exception ex) {
            return; // class not available for testing
        }

        MysqLXADataSource xaDs = new MysqLXADataSource();
        xaDs.setUrl(dbUrl);

        MysqLValidConnectionChecker checker = new MysqLValidConnectionChecker();
        assertNull(checker.isValidConnection(xaDs.getXAConnection().getConnection()));
    }
}
项目：ForYou    文件：DataSourceRegressionTest.java    
/**
 * Tests fix for BUG#20242 - MysqLValidConnectionChecker for JBoss doesn't
 * work with MysqLXADataSources.
 * 
 * @throws Exception if the test fails.
 */
public void testBug20242() throws Exception {
    if (versionMeetsMinimum(5,0)) {
        try {
            Class.forName("org.jboss.resource.adapter.jdbc.ValidConnectionChecker");
        } catch (Exception ex) {
            return; // class not available for testing
        }

        MysqLXADataSource xaDs = new MysqLXADataSource();
        xaDs.setUrl(dbUrl);

        MysqLValidConnectionChecker checker = new MysqLValidConnectionChecker();
        assertNull(checker.isValidConnection(xaDs.getXAConnection().getConnection()));
    }   
}
项目：group-five    文件：DataSourceRegressionTest.java    
/**
 * Tests fix for BUG#20242 - MysqLValidConnectionChecker for JBoss doesn't
 * work with MysqLXADataSources.
 * 
 * @throws Exception
 *             if the test fails.
 */
public void testBug20242() throws Exception {
    if (versionMeetsMinimum(5,0)) {
        try {
            Class.forName("org.jboss.resource.adapter.jdbc.ValidConnectionChecker");
        } catch (Exception ex) {
            return; // class not available for testing
        }

        MysqLXADataSource xaDs = new MysqLXADataSource();
        xaDs.setUrl(dbUrl);

        MysqLValidConnectionChecker checker = new MysqLValidConnectionChecker();
        assertNull(checker.isValidConnection(xaDs.getXAConnection().getConnection()));
    }
}
项目：locaviewer    文件：DataSourceRegressionTest.java    
/**
 * Tests fix for BUG#20242 - MysqLValidConnectionChecker for JBoss doesn't
 * work with MysqLXADataSources.
 * 
 * @throws Exception
 *             if the test fails.
 */
public void testBug20242() throws Exception {
    if (versionMeetsMinimum(5,0)) {
        try {
            Class.forName("org.jboss.resource.adapter.jdbc.ValidConnectionChecker");
        } catch (Exception ex) {
            return; // class not available for testing
        }

        MysqLXADataSource xaDs = new MysqLXADataSource();
        xaDs.setUrl(dbUrl);

        MysqLValidConnectionChecker checker = new MysqLValidConnectionChecker();
        assertNull(checker.isValidConnection(xaDs.getXAConnection().getConnection()));
    }
}
项目：Gladiatus    文件：DataSourceRegressionTest.java    
/**
 * Tests fix for BUG#20242 - MysqLValidConnectionChecker for JBoss doesn't
 * work with MysqLXADataSources.
 * 
 * @throws Exception if the test fails.
 */
public void testBug20242() throws Exception {
    if (versionMeetsMinimum(5,0)) {
        try {
            Class.forName("org.jboss.resource.adapter.jdbc.ValidConnectionChecker");
        } catch (Exception ex) {
            return; // class not available for testing
        }

        MysqLXADataSource xaDs = new MysqLXADataSource();
        xaDs.setUrl(dbUrl);

        MysqLValidConnectionChecker checker = new MysqLValidConnectionChecker();
        assertNull(checker.isValidConnection(xaDs.getXAConnection().getConnection()));
    }   
}
项目：Jspad    文件：DataSourceRegressionTest.java    
/**
 * Tests fix for BUG#20242 - MysqLValidConnectionChecker for JBoss doesn't
 * work with MysqLXADataSources.
 * 
 * @throws Exception if the test fails.
 */
public void testBug20242() throws Exception {
    if (versionMeetsMinimum(5,0)) {
        try {
            Class.forName("org.jboss.resource.adapter.jdbc.ValidConnectionChecker");
        } catch (Exception ex) {
            return; // class not available for testing
        }

        MysqLXADataSource xaDs = new MysqLXADataSource();
        xaDs.setUrl(dbUrl);

        MysqLValidConnectionChecker checker = new MysqLValidConnectionChecker();
        assertNull(checker.isValidConnection(xaDs.getXAConnection().getConnection()));
    }   
}
项目：Trails    文件：DataSourceRegressionTest.java    
/**
 * Tests fix for BUG#20242 - MysqLValidConnectionChecker for JBoss doesn't
 * work with MysqLXADataSources.
 * 
 * @throws Exception if the test fails.
 */
public void testBug20242() throws Exception {
    if (versionMeetsMinimum(5,0)) {
        try {
            Class.forName("org.jboss.resource.adapter.jdbc.ValidConnectionChecker");
        } catch (Exception ex) {
            return; // class not available for testing
        }

        MysqLXADataSource xaDs = new MysqLXADataSource();
        xaDs.setUrl(dbUrl);

        MysqLValidConnectionChecker checker = new MysqLValidConnectionChecker();
        assertNull(checker.isValidConnection(xaDs.getXAConnection().getConnection()));
    }   
}
项目：fil_project_mgmt_app_v2    文件：ConnectionRegressionTest.java    
public void testBug29106() throws Exception {
    ClassLoader cl = Thread.currentThread().getContextClassLoader();
    Class<?> checkerClass = cl
            .loadClass("com.MysqL.jdbc.integration.jboss.MysqLValidConnectionChecker");
    ((MysqLValidConnectionChecker) checkerClass.newInstance())
            .isValidConnection(this.conn);
}
项目：ForYou    文件：ConnectionRegressionTest.java    
public void testBug29106() throws Exception {
    ClassLoader cl = Thread.currentThread().getContextClassLoader();
    Class<?> checkerClass = cl
            .loadClass("com.MysqL.jdbc.integration.jboss.MysqLValidConnectionChecker");
    ((MysqLValidConnectionChecker) checkerClass.newInstance())
            .isValidConnection(this.conn);
}
项目：Gladiatus    文件：ConnectionRegressionTest.java    
public void testBug29106() throws Exception {
    ClassLoader cl = Thread.currentThread().getContextClassLoader();
    Class<?> checkerClass = cl
            .loadClass("com.MysqL.jdbc.integration.jboss.MysqLValidConnectionChecker");
    ((MysqLValidConnectionChecker) checkerClass.newInstance())
            .isValidConnection(this.conn);
}
项目：Jspad    文件：ConnectionRegressionTest.java    
public void testBug29106() throws Exception {
    ClassLoader cl = Thread.currentThread().getContextClassLoader();
    Class<?> checkerClass = cl
            .loadClass("com.MysqL.jdbc.integration.jboss.MysqLValidConnectionChecker");
    ((MysqLValidConnectionChecker) checkerClass.newInstance())
            .isValidConnection(this.conn);
}
项目：Trails    文件：ConnectionRegressionTest.java    
public void testBug29106() throws Exception {
    ClassLoader cl = Thread.currentThread().getContextClassLoader();
    Class<?> checkerClass = cl
            .loadClass("com.MysqL.jdbc.integration.jboss.MysqLValidConnectionChecker");
    ((MysqLValidConnectionChecker) checkerClass.newInstance())
            .isValidConnection(this.conn);
}
项目：the-vigilantes    文件：ConnectionRegressionTest.java    
public void testBug29106() throws Exception {
    ClassLoader cl = Thread.currentThread().getContextClassLoader();
    Class<?> checkerClass = cl.loadClass("com.MysqL.jdbc.integration.jboss.MysqLValidConnectionChecker");
    ((MysqLValidConnectionChecker) checkerClass.newInstance()).isValidConnection(this.conn);
}
项目：OpenVertretung    文件：ConnectionRegressionTest.java    
public void testBug29106() throws Exception {
    ClassLoader cl = Thread.currentThread().getContextClassLoader();
    Class<?> checkerClass = cl.loadClass("com.MysqL.jdbc.integration.jboss.MysqLValidConnectionChecker");
    ((MysqLValidConnectionChecker) checkerClass.newInstance()).isValidConnection(this.conn);
}
项目：ProyectoPacientes    文件：ConnectionRegressionTest.java    
public void testBug29106() throws Exception {
    ClassLoader cl = Thread.currentThread().getContextClassLoader();
    Class<?> checkerClass = cl.loadClass("com.MysqL.jdbc.integration.jboss.MysqLValidConnectionChecker");
    ((MysqLValidConnectionChecker) checkerClass.newInstance()).isValidConnection(this.conn);
}
项目：BibliotecaPS    文件：ConnectionRegressionTest.java    
public void testBug29106() throws Exception {
    ClassLoader cl = Thread.currentThread().getContextClassLoader();
    Class<?> checkerClass = cl.loadClass("com.MysqL.jdbc.integration.jboss.MysqLValidConnectionChecker");
    ((MysqLValidConnectionChecker) checkerClass.newInstance()).isValidConnection(this.conn);
}
项目：Geometry-wars    文件：ConnectionRegressionTest.java    
public void testBug29106() throws Exception {
    ClassLoader cl = Thread.currentThread().getContextClassLoader();
    Class<?> checkerClass = cl.loadClass("com.MysqL.jdbc.integration.jboss.MysqLValidConnectionChecker");
    ((MysqLValidConnectionChecker) checkerClass.newInstance()).isValidConnection(this.conn);
}
项目：TPKB    文件：ConnectionRegressionTest.java    
public void testBug29106() throws Exception {
    ClassLoader cl = Thread.currentThread().getContextClassLoader();
    Class<?> checkerClass = cl.loadClass("com.MysqL.jdbc.integration.jboss.MysqLValidConnectionChecker");
    ((MysqLValidConnectionChecker) checkerClass.newInstance()).isValidConnection(this.conn);
}
项目：cloudera-cli-scripts    文件：ConnectionRegressionTest.java    
public void testBug29106() throws Exception {
    ClassLoader cl = Thread.currentThread().getContextClassLoader();
    Class<?> checkerClass = cl.loadClass("com.MysqL.jdbc.integration.jboss.MysqLValidConnectionChecker");
    ((MysqLValidConnectionChecker) checkerClass.newInstance()).isValidConnection(this.conn);
}
项目：SMPT42    文件：ConnectionRegressionTest.java    
public void testBug29106() throws Exception {
    ClassLoader cl = Thread.currentThread().getContextClassLoader();
    Class<?> checkerClass = cl.loadClass("com.MysqL.jdbc.integration.jboss.MysqLValidConnectionChecker");
    ((MysqLValidConnectionChecker) checkerClass.newInstance()).isValidConnection(this.conn);
}
项目：group-five    文件：ConnectionRegressionTest.java    
public void testBug29106() throws Exception {
    ClassLoader cl = Thread.currentThread().getContextClassLoader();
    Class<?> checkerClass = cl.loadClass("com.MysqL.jdbc.integration.jboss.MysqLValidConnectionChecker");
    ((MysqLValidConnectionChecker) checkerClass.newInstance()).isValidConnection(this.conn);
}
项目：locaviewer    文件：ConnectionRegressionTest.java    
public void testBug29106() throws Exception {
    ClassLoader cl = Thread.currentThread().getContextClassLoader();
    Class<?> checkerClass = cl.loadClass("com.MysqL.jdbc.integration.jboss.MysqLValidConnectionChecker");
    ((MysqLValidConnectionChecker) checkerClass.newInstance()).isValidConnection(this.conn);
}

Druid 连接mysql 报skip not validate connection

Druid 连接mysql 报skip not validate connection

2015-10-06 15:31:53 -2722434 [http-apr-8090-exec-4] DEBUG   - skip not validate connection.

2015-10-06 15:32:12 -2741345 [http-apr-8090-exec-4] DEBUG   - skip not validate connection.

用的druid关联连接池，数据库是mysql，一段时间不用之后就会报这个错误。之前有人说是mysql系统的问题。我从window换成linux也是这样。下面是我的配置文件 

url:jdbc:mysql://xxx.xx.xxx.xxx:3306/XXX?Unicode=true&amp;characterEncoding=utf8&autoReconnect=true
driverClassName:com.mysql.jdbc.Driver
username:root
password:123456
       
filters:stat
   
maxActive:100
initialSize:10
maxWait:60000
minIdle:20
maxIdle:100
   
timeBetweenEvictionRunsMillis:60000
minEvictableIdleTimeMillis:300000
   
validationQuery:SELECT ''x''
testWhileIdle:true
testOnBorrow:false
testOnReturn:false

maxOpenPreparedStatements:20
removeAbandoned:true
removeAbandonedTimeout:180
logAbandoned:true





spring里面的配置 

<!-- 阿里 druid数据库连接池 -->
	<bean id="dataSource"destroy-method="close">
		<!-- 数据库基本信息配置 -->
		<property name="url" value="${url}" />
		<property name="username" value="${username}" />
		<property name="password" value="${password}" />
		<property name="driverClassName" value="${driverClassName}" />
		<property name="filters" value="${filters}" />
		<!-- 最大并发连接数 -->
		<property name="maxActive" value="${maxActive}" />
		<!-- 初始化连接数量 -->
		<property name="initialSize" value="${initialSize}" />
		<!-- 配置获取连接等待超时的时间 -->
		<property name="maxWait" value="${maxWait}" />
		<!-- 最小空闲连接数 -->
		<property name="minIdle" value="${minIdle}" />
		<!-- 配置间隔多久才进行一次检测，检测需要关闭的空闲连接，单位是毫秒 -->
		<property name="timeBetweenEvictionRunsMillis" value="${timeBetweenEvictionRunsMillis}" />
		<!-- 配置一个连接在池中最小生存的时间，单位是毫秒 -->
		<property name="minEvictableIdleTimeMillis" value="${minEvictableIdleTimeMillis}" />
		<property name="validationQuery" value="${validationQuery}" />
		<property name="testWhileIdle" value="${testWhileIdle}" />
		<property name="testOnBorrow" value="${testOnBorrow}" />
		<property name="testOnReturn" value="${testOnReturn}" />
		<property name="maxOpenPreparedStatements" value="${maxOpenPreparedStatements}" />
		<!-- 打开removeAbandoned功能 -->
		<property name="removeAbandoned" value="${removeAbandoned}" />
		<!-- 1800秒，也就是30分钟 -->
		<property name="removeAbandonedTimeout" value="${removeAbandonedTimeout}" />
		<!-- 关闭abanded连接时输出错误日志 -->
		<property name="logAbandoned" value="${logAbandoned}" />
	</bean>



是不是哪里配错了？为什么会出现这个情况？  数据库是远程服务器上的数据库，网络绝对没有问题。目前能排除的问题有网络、数据库（换过低版本，高版本）、系统（window、linux）、所以这个问题应该出现在程序上，应该是我配置文件的问题。求大神解答。。

Evaluate the value of an arithmetic expression in Reverse Polish Notation. Valid operators are+,-,*,/. Each operand may be an integer or another expression. Some examples:

Evaluate the value of an arithmetic expression in Reverse Polish Notation. Valid operators are+,-,*,/. Each operand may be an integer or another expression. Some examples:

import java.util.*;
public class Solution {
    public int evalrpn(String[] tokens) {
       
        //int temp = 0;
       Stack<Integer> stack = new Stack<Integer>();
        for( int i = 0; i < tokens.length; i++){
            if(tokens[i].equals("+") || tokens[i].equals("-") || tokens[i].equals("*") || tokens[i].equals("/")){
                int a = stack.pop();
                int b = stack.pop();
                //temp =  calculateMethod(tokens[i],a,b);
                stack.push(calculateMethod(tokens[i],b));
            }else{
                stack.push(Integer.parseInt(tokens[i]));
            }
        }
        return stack.pop();
    }

    public  int calculateMethod(String tokens,int a,int b)  {
        if(tokens.equals("+")){
            return b + a;
        }else if(tokens.equals("-")){
            return b - a;
        }else if(tokens.equals("*")){
            return b * a;
        }
        else{
            //int c= b/a;
           // System.out.println(c);
            return b/a;
        }
    }
}

今天关于Mysql 插入查询抱怨 >= not valid at this position 错误和mysql查询报错2014的分享就到这里，希望大家有所收获，若想了解更多关于1.0MySQL 常见错误【This function has none of DETERMINISTIC, NO SQL, or READS SQL DATA】、com.mysql.jdbc.integration.jboss.MysqlValidConnectionChecker的实例源码、Druid 连接mysql 报skip not validate connection、Evaluate the value of an arithmetic expression in Reverse Polish Notation. Valid operators are+,-,*,/. Each operand may be an integer or another expression. Some examples:等相关知识，可以在本站进行查询。

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