Java ClassCastException在相等的类之间Wildfly 10
我正在创建一个RESTful应用程序,在转换新连接时遇到问题。 我的应用服务器是Wildfly 10.0 独立完整.xml中的数据源和驱动程序:Java ClassCastException在相等的类之间Wildfly 10,java,connection,wrapper,wildfly,classcastexception,Java,Connection,Wrapper,Wildfly,Classcastexception,我正在创建一个RESTful应用程序,在转换新连接时遇到问题。 我的应用服务器是Wildfly 10.0 独立完整.xml中的数据源和驱动程序: <datasource jndi-name="java:jboss/datasources/PostgreDS" pool-name="PostgreDS" enabled="true" use-java-context="true"> <connection-url>jdbc:postgresql://192.168.
<datasource jndi-name="java:jboss/datasources/PostgreDS" pool-name="PostgreDS" enabled="true" use-java-context="true">
<connection-url>jdbc:postgresql://192.168.0.112:5432/bdns</connection-url>
<driver>postgresql</driver>
<transaction-isolation>TRANSACTION_READ_COMMITTED</transaction-isolation>
<pool>
<min-pool-size>10</min-pool-size>
<max-pool-size>40</max-pool-size>
<prefill>true</prefill>
</pool>
<security>
<user-name>sa</user-name>
<password>000000</password>
</security>
<statement>
<prepared-statement-cache-size>32</prepared-statement-cache-size>
<share-prepared-statements>true</share-prepared-statements>
</statement>
</datasource>
<drivers>
<driver name="postgresql" module="org.postgresql">
<xa-datasource-class>org.postgresql.xa.PGXADataSource</xa-datasource-class>
</driver>
</drivers>
package dao;
import java.sql.Connection;
import java.sql.SQLException;
import javax.naming.InitialContext;
import javax.naming.NamingException;
import javax.sql.DataSource;
import org.jboss.jca.adapters.jdbc.jdk7.WrappedConnectionJDK7;
import org.postgresql.jdbc.PgConnection;
public class ConnectionMng {
private DataSource ds;
private ConnectionMng() throws NamingException {
this.ds = (DataSource)new InitialContext().lookup("java:jboss/datasources/PostgreDS");
}
public PgConnection getPgConnection() throws SQLException {
WrappedConnectionJDK7 wrappedConn = (WrappedConnectionJDK7)ds.getConnection();
Connection underlyingConn = wrappedConn.getUnderlyingConnection();
return (PgConnection)underlyingConn;
}
}
ClassCastException: org.jboss.jca.adapters.jdbc.jdk7.WrappedConnectionJDK7 cannot be cast to org.jboss.jca.adapters.jdbc.jdk7.WrappedConnectionJDK7
<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/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>Core</groupId>
<artifactId>Core</artifactId>
<version>1.0.0-SNAPSHOT</version>
<packaging>war</packaging>
<name>Core</name>
<description>Core</description>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<java.version>1.8</java.version>
<javac.target>1.8</javac.target>
<postgresql.enforce.jdk.version>[1.7,1.8)</postgresql.enforce.jdk.version>
</properties>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>1.3.3.RELEASE</version>
</parent>
<dependencies>
<dependency>
<groupId>org.wildfly</groupId>
<artifactId>wildfly-connector</artifactId>
<version>10.0.0.Final</version>
</dependency>
<dependency>
<groupId>org.postgresql</groupId>
<artifactId>postgresql</artifactId>
</dependency>
<dependency>
<groupId>javax</groupId>
<artifactId>javaee-api</artifactId>
<version>7.0</version>
</dependency>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>servlet-api</artifactId>
<version>2.5</version>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
<exclusions>
<exclusion>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-tomcat</artifactId>
</exclusion>
</exclusions>
</dependency>
<dependency>
<groupId>org.apache.commons</groupId>
<artifactId>commons-dbcp2</artifactId>
</dependency>
<dependency>
<groupId>org.codehaus.jackson</groupId>
<artifactId>jackson-mapper-asl</artifactId>
<version>1.9.13</version>
</dependency>
<dependency>
<groupId>org.apache.poi</groupId>
<artifactId>poi-ooxml</artifactId>
<version>3.12</version>
</dependency>
<dependency>
<groupId>commons-fileupload</groupId>
<artifactId>commons-fileupload</artifactId>
<version>1.3.1</version>
</dependency>
<dependency>
<groupId>com.thoughtworks.xstream</groupId>
<artifactId>xstream</artifactId>
<version>1.4.8</version>
</dependency>
<dependency>
<groupId>com.github.junrar</groupId>
<artifactId>junrar</artifactId>
<version>0.7</version>
</dependency>
<dependency>
<groupId>org.zeroturnaround</groupId>
<artifactId>zt-zip</artifactId>
<version>1.9</version>
<type>jar</type>
<exclusions>
<exclusion>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-log4j12</artifactId>
</exclusion>
<exclusion>
<groupId>log4j</groupId>
<artifactId>log4j</artifactId>
</exclusion>
</exclusions>
</dependency>
</dependencies>
<build>
<sourceDirectory>src</sourceDirectory>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<configuration>
<source>1.8</source>
<target>1.8</target>
</configuration>
</plugin>
<plugin>
<artifactId>maven-war-plugin</artifactId>
<configuration>
<warSourceDirectory>WebContent</warSourceDirectory>
<failOnMissingWebXml>false</failOnMissingWebXml>
</configuration>
</plugin>
</plugins>
</build>
发生异常:
<datasource jndi-name="java:jboss/datasources/PostgreDS" pool-name="PostgreDS" enabled="true" use-java-context="true">
<connection-url>jdbc:postgresql://192.168.0.112:5432/bdns</connection-url>
<driver>postgresql</driver>
<transaction-isolation>TRANSACTION_READ_COMMITTED</transaction-isolation>
<pool>
<min-pool-size>10</min-pool-size>
<max-pool-size>40</max-pool-size>
<prefill>true</prefill>
</pool>
<security>
<user-name>sa</user-name>
<password>000000</password>
</security>
<statement>
<prepared-statement-cache-size>32</prepared-statement-cache-size>
<share-prepared-statements>true</share-prepared-statements>
</statement>
</datasource>
<drivers>
<driver name="postgresql" module="org.postgresql">
<xa-datasource-class>org.postgresql.xa.PGXADataSource</xa-datasource-class>
</driver>
</drivers>
package dao;
import java.sql.Connection;
import java.sql.SQLException;
import javax.naming.InitialContext;
import javax.naming.NamingException;
import javax.sql.DataSource;
import org.jboss.jca.adapters.jdbc.jdk7.WrappedConnectionJDK7;
import org.postgresql.jdbc.PgConnection;
public class ConnectionMng {
private DataSource ds;
private ConnectionMng() throws NamingException {
this.ds = (DataSource)new InitialContext().lookup("java:jboss/datasources/PostgreDS");
}
public PgConnection getPgConnection() throws SQLException {
WrappedConnectionJDK7 wrappedConn = (WrappedConnectionJDK7)ds.getConnection();
Connection underlyingConn = wrappedConn.getUnderlyingConnection();
return (PgConnection)underlyingConn;
}
}
ClassCastException: org.jboss.jca.adapters.jdbc.jdk7.WrappedConnectionJDK7 cannot be cast to org.jboss.jca.adapters.jdbc.jdk7.WrappedConnectionJDK7
<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/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>Core</groupId>
<artifactId>Core</artifactId>
<version>1.0.0-SNAPSHOT</version>
<packaging>war</packaging>
<name>Core</name>
<description>Core</description>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<java.version>1.8</java.version>
<javac.target>1.8</javac.target>
<postgresql.enforce.jdk.version>[1.7,1.8)</postgresql.enforce.jdk.version>
</properties>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>1.3.3.RELEASE</version>
</parent>
<dependencies>
<dependency>
<groupId>org.wildfly</groupId>
<artifactId>wildfly-connector</artifactId>
<version>10.0.0.Final</version>
</dependency>
<dependency>
<groupId>org.postgresql</groupId>
<artifactId>postgresql</artifactId>
</dependency>
<dependency>
<groupId>javax</groupId>
<artifactId>javaee-api</artifactId>
<version>7.0</version>
</dependency>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>servlet-api</artifactId>
<version>2.5</version>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
<exclusions>
<exclusion>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-tomcat</artifactId>
</exclusion>
</exclusions>
</dependency>
<dependency>
<groupId>org.apache.commons</groupId>
<artifactId>commons-dbcp2</artifactId>
</dependency>
<dependency>
<groupId>org.codehaus.jackson</groupId>
<artifactId>jackson-mapper-asl</artifactId>
<version>1.9.13</version>
</dependency>
<dependency>
<groupId>org.apache.poi</groupId>
<artifactId>poi-ooxml</artifactId>
<version>3.12</version>
</dependency>
<dependency>
<groupId>commons-fileupload</groupId>
<artifactId>commons-fileupload</artifactId>
<version>1.3.1</version>
</dependency>
<dependency>
<groupId>com.thoughtworks.xstream</groupId>
<artifactId>xstream</artifactId>
<version>1.4.8</version>
</dependency>
<dependency>
<groupId>com.github.junrar</groupId>
<artifactId>junrar</artifactId>
<version>0.7</version>
</dependency>
<dependency>
<groupId>org.zeroturnaround</groupId>
<artifactId>zt-zip</artifactId>
<version>1.9</version>
<type>jar</type>
<exclusions>
<exclusion>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-log4j12</artifactId>
</exclusion>
<exclusion>
<groupId>log4j</groupId>
<artifactId>log4j</artifactId>
</exclusion>
</exclusions>
</dependency>
</dependencies>
<build>
<sourceDirectory>src</sourceDirectory>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<configuration>
<source>1.8</source>
<target>1.8</target>
</configuration>
</plugin>
<plugin>
<artifactId>maven-war-plugin</artifactId>
<configuration>
<warSourceDirectory>WebContent</warSourceDirectory>
<failOnMissingWebXml>false</failOnMissingWebXml>
</configuration>
</plugin>
</plugins>
</build>
pom.xml:
<datasource jndi-name="java:jboss/datasources/PostgreDS" pool-name="PostgreDS" enabled="true" use-java-context="true">
<connection-url>jdbc:postgresql://192.168.0.112:5432/bdns</connection-url>
<driver>postgresql</driver>
<transaction-isolation>TRANSACTION_READ_COMMITTED</transaction-isolation>
<pool>
<min-pool-size>10</min-pool-size>
<max-pool-size>40</max-pool-size>
<prefill>true</prefill>
</pool>
<security>
<user-name>sa</user-name>
<password>000000</password>
</security>
<statement>
<prepared-statement-cache-size>32</prepared-statement-cache-size>
<share-prepared-statements>true</share-prepared-statements>
</statement>
</datasource>
<drivers>
<driver name="postgresql" module="org.postgresql">
<xa-datasource-class>org.postgresql.xa.PGXADataSource</xa-datasource-class>
</driver>
</drivers>
package dao;
import java.sql.Connection;
import java.sql.SQLException;
import javax.naming.InitialContext;
import javax.naming.NamingException;
import javax.sql.DataSource;
import org.jboss.jca.adapters.jdbc.jdk7.WrappedConnectionJDK7;
import org.postgresql.jdbc.PgConnection;
public class ConnectionMng {
private DataSource ds;
private ConnectionMng() throws NamingException {
this.ds = (DataSource)new InitialContext().lookup("java:jboss/datasources/PostgreDS");
}
public PgConnection getPgConnection() throws SQLException {
WrappedConnectionJDK7 wrappedConn = (WrappedConnectionJDK7)ds.getConnection();
Connection underlyingConn = wrappedConn.getUnderlyingConnection();
return (PgConnection)underlyingConn;
}
}
ClassCastException: org.jboss.jca.adapters.jdbc.jdk7.WrappedConnectionJDK7 cannot be cast to org.jboss.jca.adapters.jdbc.jdk7.WrappedConnectionJDK7
<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/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>Core</groupId>
<artifactId>Core</artifactId>
<version>1.0.0-SNAPSHOT</version>
<packaging>war</packaging>
<name>Core</name>
<description>Core</description>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<java.version>1.8</java.version>
<javac.target>1.8</javac.target>
<postgresql.enforce.jdk.version>[1.7,1.8)</postgresql.enforce.jdk.version>
</properties>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>1.3.3.RELEASE</version>
</parent>
<dependencies>
<dependency>
<groupId>org.wildfly</groupId>
<artifactId>wildfly-connector</artifactId>
<version>10.0.0.Final</version>
</dependency>
<dependency>
<groupId>org.postgresql</groupId>
<artifactId>postgresql</artifactId>
</dependency>
<dependency>
<groupId>javax</groupId>
<artifactId>javaee-api</artifactId>
<version>7.0</version>
</dependency>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>servlet-api</artifactId>
<version>2.5</version>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
<exclusions>
<exclusion>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-tomcat</artifactId>
</exclusion>
</exclusions>
</dependency>
<dependency>
<groupId>org.apache.commons</groupId>
<artifactId>commons-dbcp2</artifactId>
</dependency>
<dependency>
<groupId>org.codehaus.jackson</groupId>
<artifactId>jackson-mapper-asl</artifactId>
<version>1.9.13</version>
</dependency>
<dependency>
<groupId>org.apache.poi</groupId>
<artifactId>poi-ooxml</artifactId>
<version>3.12</version>
</dependency>
<dependency>
<groupId>commons-fileupload</groupId>
<artifactId>commons-fileupload</artifactId>
<version>1.3.1</version>
</dependency>
<dependency>
<groupId>com.thoughtworks.xstream</groupId>
<artifactId>xstream</artifactId>
<version>1.4.8</version>
</dependency>
<dependency>
<groupId>com.github.junrar</groupId>
<artifactId>junrar</artifactId>
<version>0.7</version>
</dependency>
<dependency>
<groupId>org.zeroturnaround</groupId>
<artifactId>zt-zip</artifactId>
<version>1.9</version>
<type>jar</type>
<exclusions>
<exclusion>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-log4j12</artifactId>
</exclusion>
<exclusion>
<groupId>log4j</groupId>
<artifactId>log4j</artifactId>
</exclusion>
</exclusions>
</dependency>
</dependencies>
<build>
<sourceDirectory>src</sourceDirectory>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<configuration>
<source>1.8</source>
<target>1.8</target>
</configuration>
</plugin>
<plugin>
<artifactId>maven-war-plugin</artifactId>
<configuration>
<warSourceDirectory>WebContent</warSourceDirectory>
<failOnMissingWebXml>false</failOnMissingWebXml>
</configuration>
</plugin>
</plugins>
</build>
4.0.0
核心
核心
1.0.0-SNAPSHOT
战争
核心
核心
UTF-8
1.8
1.8
[1.7,1.8)
org.springframework.boot
spring启动程序父级
1.3.3.1发布
野生蝇
wildfly连接器
10.0.0.1决赛
org.postgresql
postgresql
爪哇
JavaEEAPI
7
javax.servlet
servlet api
2.5
org.springframework.boot
SpringBootStarterWeb
org.springframework.boot
弹簧启动机tomcat
org.apache.commons
commons-dbcp2
org.codehaus.jackson
杰克逊地图绘制者
1.9.13
org.apache.poi
poi ooxml
3.12
文件上传
文件上传
1.3.1
com.thoughtworks.xstream
xstream
1.4.8
com.github.junrar
朱拉尔
0.7
零周转
zt拉链
1.9
罐子
org.slf4j
slf4j-log4j12
log4j
log4j
src
org.apache.maven.plugins
maven编译器插件
1.8
1.8
maven战争插件
网络内容
假的
很明显,如前所述,由于依赖冲突,您遇到了类加载器问题 要解决此问题,您应该将您的wildfly连接器依赖项标记为提供的
<dependency>
<groupId>org.wildfly</groupId>
<artifactId>wildfly-connector</artifactId>
<version>10.0.0.Final</version>
<scope>provided</scope>
</dependency>
野生蝇
,需要显式触发JCA子系统,可以使用jboss-deployment-structure.xml,内容如下:
<?xml version="1.0" encoding="UTF-8"?>
<jboss-deployment-structure>
<deployment>
<dependencies>
<module name="org.jboss.ironjacamar.jdbcadapters" slot="main"/>
</dependencies>
</deployment>
</jboss-deployment-structure>
然后,将jboss-deployment-structure.xml添加到WAR的WEB-INF文件夹中。aribeiro给出的答案是正确的:由构建工具(Maven)打包的jar位于WAR的lib目录中,与wildfly类加载器冲突
另外,以下是针对以下问题的通用解决方案:
- 你有JBoss7 AS或Wildfly AS
- 您可以使用Eclipse JBoss工具
- 部署EAR或WAR时,库文件夹由Maven之类的构建工具打包
- 出现如下错误:examplepackage.ExcampleClass无法强制转换为examplepackage.ExcampleClass
大多数情况下,当您离开Java EE规范并使用JBoss/Wildfly特定模块、ironjacamar、jsf impl等时,就会发生这种情况。Maven将所需的JAR放在lib目录中。但是JAR已经在AS的模块目录中。根据我的经验,ClassCastException
就是出于这个原因发生的
然后必须在maven中通过声明所提供的依赖项从lib目录中删除jar
告诉JBoss/Wildfly类加载器在哪里可以找到该类。这可以通过以下方式完成:
- 向项目的
MANIFEST.MF
中添加依赖项。Eclipse JBoss Tools从服务器环境加载该类,以便您可以从pom中删除该依赖项。在您的情况下:
Dependencies: org.jboss.ironjacamar.jdbcadapters
- 或者使用
jboss deployment structure.xml
,然后可以使用Maven加载该类,但按照提供的方式声明它
<dependencies>
<module name="org.jboss.ironjacamar.jdbcadapters" />
</dependencies>
另请参见so从ds.getConnection()返回的对象类型
?@ScaryWombat连接应用程序服务器是的。但我需要PgConnection类型。ironjacamar jar似乎打包在您的WEB INF lib目录中,可能是由于wildfly连接器的依赖关系。因此,您有两个WrappedConnectionJDK7类:一个来自lib目录,另一个来自wildfly@JanPiel我能做些什么来修复?为什么不将您的wildfly连接器依赖项标记为提供的?wildfly已经有了它。您无需将其与应用程序打包。