redis 包我引入了的 可是调用JedisPool提示出错 为什么!
来源:11-4 引入缓存技术之配置讲解
宝慕林1004770
2018-03-10
我去看了下源码发现JedisPool的构造方法里第一个参数应该是GenericObjectConfig 这是为什么啊 为什么老师那里不报错?求解 我的redis是2.9.0
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3回答
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应该是同学的配置或者执行环境有问题导致的,单就这个问题,可以试着引入相关jar去解决
<!-- https://mvnrepository.com/artifact/org.apache.commons/commons-pool2 --> <dependency> <groupId>org.apache.commons</groupId> <artifactId>commons-pool2</artifactId> <version>2.5.0</version> </dependency>
022018-03-11 -
翔仔
2018-03-11
同学好,你可以点进JedisPoolConfig,你发现它继承自GenericObjectPoolConfig
public class JedisPoolConfig extends GenericObjectPoolConfig { public JedisPoolConfig() { // defaults to make your life with connection pool easier :) setTestWhileIdle(true); setMinEvictableIdleTimeMillis(60000); setTimeBetweenEvictionRunsMillis(30000); setNumTestsPerEvictionRun(-1); } }
我的redis也是2.9.0,其他同学也都没报错,请仔细检查配置
JedisPoolWriper.java
package com.imooc.o2o.cache; import redis.clients.jedis.JedisPool; import redis.clients.jedis.JedisPoolConfig; /** * 强指定redis的JedisPool接口构造函数,这样才能在centos成功创建jedispool * * @author xiangze * */ public class JedisPoolWriper { /** Redis连接池对象 */ private JedisPool jedisPool; public JedisPoolWriper(final JedisPoolConfig poolConfig, final String host, final int port) { try { jedisPool = new JedisPool(poolConfig, host, port); } catch (Exception e) { e.printStackTrace(); } } /** * 获取Redis连接池对象 * @return */ public JedisPool getJedisPool() { return jedisPool; } /** * 注入Redis连接池对象 * @param jedisPool */ public void setJedisPool(JedisPool jedisPool) { this.jedisPool = jedisPool; } }
pom.xml
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd"> <modelVersion>4.0.0</modelVersion> <groupId>com.imooc</groupId> <artifactId>o2o</artifactId> <packaging>war</packaging> <version>0.0.1-SNAPSHOT</version> <name>o2o Maven Webapp</name> <url>http://maven.apache.org</url> <properties> <spring.version>4.3.7.RELEASE</spring.version> </properties> <dependencies> <dependency> <groupId>junit</groupId> <artifactId>junit</artifactId> <version>4.12</version> <scope>test</scope> </dependency> <!-- https://mvnrepository.com/artifact/ch.qos.logback/logback-classic --> <dependency> <groupId>ch.qos.logback</groupId> <artifactId>logback-classic</artifactId> <version>1.2.3</version> </dependency> <!-- Spring --> <!-- 1)包含Spring 框架基本的核心工具类。Spring 其它组件要都要使用到这个包里的类,是其它组件的基本核心 --> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-core</artifactId> <version>${spring.version}</version> </dependency> <!-- 2)这个jar 文件是所有应用都要用到的,它包含访问配置文件、创建和管理bean 以及进行Inversion of Control / Dependency Injection(IoC/DI)操作相关的所有类。如果应用只需基本的IoC/DI 支持,引入spring-core.jar 及spring-beans.jar 文件就可以了。 --> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-beans</artifactId> <version>${spring.version}</version> </dependency> <!-- 3)这个jar 文件为Spring 核心提供了大量扩展。可以找到使用Spring ApplicationContext特性时所需的全部类,JDNI 所需的全部类,instrumentation组件以及校验Validation 方面的相关类。 --> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-context</artifactId> <version>${spring.version}</version> </dependency> <!-- 4) 这个jar 文件包含对Spring 对JDBC 数据访问进行封装的所有类。 --> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-jdbc</artifactId> <version>${spring.version}</version> </dependency> <!-- 5) 为JDBC、Hibernate、JDO、JPA等提供的一致的声明式和编程式事务管理。 --> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-tx</artifactId> <version>${spring.version}</version> </dependency> <!-- 6)Spring web 包含Web应用开发时,用到Spring框架时所需的核心类,包括自动载入WebApplicationContext特性的类、Struts与JSF集成类、文件上传的支持类、Filter类和大量工具辅助类。 --> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-web</artifactId> <version>${spring.version}</version> </dependency> <!-- 7)包含SpringMVC框架相关的所有类。 --> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-webmvc</artifactId> <version>${spring.version}</version> </dependency> <!-- 8)Spring test 对JUNIT等测试框架的简单封装 --> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-test</artifactId> <version>${spring.version}</version> <scope>test</scope> </dependency> <!-- Servlet web --> <dependency> <groupId>javax.servlet</groupId> <artifactId>javax.servlet-api</artifactId> <version>3.1.0</version> </dependency> <!-- json解析 --> <dependency> <groupId>com.fasterxml.jackson.core</groupId> <artifactId>jackson-databind</artifactId> <version>2.8.7</version> </dependency> <!-- Map工具类 对标准java Collection的扩展 spring-core.jar需commons-collections.jar --> <dependency> <groupId>commons-collections</groupId> <artifactId>commons-collections</artifactId> <version>3.2</version> </dependency> <!-- DAO: MyBatis --> <dependency> <groupId>org.mybatis</groupId> <artifactId>mybatis</artifactId> <version>3.4.2</version> </dependency> <dependency> <groupId>org.mybatis</groupId> <artifactId>mybatis-spring</artifactId> <version>1.3.1</version> </dependency> <!-- 数据库 --> <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> <version>5.1.37</version> </dependency> <dependency> <groupId>c3p0</groupId> <artifactId>c3p0</artifactId> <version>0.9.1.2</version> </dependency> <!-- 图片处理 --> <!-- https://mvnrepository.com/artifact/net.coobird/thumbnailator --> <dependency> <groupId>net.coobird</groupId> <artifactId>thumbnailator</artifactId> <version>0.4.8</version> </dependency> <!-- https://mvnrepository.com/artifact/com.github.penggle/kaptcha --> <dependency> <groupId>com.github.penggle</groupId> <artifactId>kaptcha</artifactId> <version>2.3.2</version> </dependency> <dependency> <groupId>commons-fileupload</groupId> <artifactId>commons-fileupload</artifactId> <version>1.3.2</version> </dependency> <!-- redis客户端:Jedis --> <dependency> <groupId>redis.clients</groupId> <artifactId>jedis</artifactId> <version>2.9.0</version> </dependency> </dependencies> <build> <finalName>o2o</finalName> <plugins> <plugin> <!-- https://mvnrepository.com/artifact/org.apache.maven.plugins/maven-compiler-plugin --> <groupId>org.apache.maven.plugins</groupId> <artifactId>maven-compiler-plugin</artifactId> <version>3.6.1</version> <configuration> <source>1.8</source> <target>1.8</target> <encoding>UTF8</encoding> </configuration> </plugin> </plugins> </build> </project>
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宝慕林1004770
提问者
2018-03-10
The constructor JedisPool(GenericObjectPoolConfig, String, int) refers to the missing type GenericObjectPoolConfig 这是错误提示信息
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