彈簧4 + MyBatis的整合使用Java 8

我現在面臨使用Java 8（1.8.0_60）當出現以下異常，春季4.2.1和3.3.0的MyBatis彈簧4 + MyBatis的整合使用Java 8

Sep 29, 2015 11:02:58 AM org.springframework.context.annotation.AnnotationConfigApplicationContext prepareRefresh 
INFO: Refreshing org.spring[email protected]246b179d: startup date [Tue Sep 29 11:02:58 EDT 2015]; root of context hierarchy 
Sep 29, 2015 11:02:58 AM org.mybatis.spring.mapper.ClassPathMapperScanner checkCandidate 
WARNING: Skipping MapperFactoryBean with name 'userMapper' and 'com.poc.test.spring4app.mapper.UserMapper' mapperInterface. Bean already defined with the same name! 
Sep 29, 2015 11:02:58 AM org.mybatis.spring.mapper.ClassPathMapperScanner doScan 
WARNING: No MyBatis mapper was found in '[com.poc.test.spring4app.mapper]' package. Please check your configuration. 
Creating tables 
Sep 29, 2015 11:02:59 AM org.springframework.context.annotation.AnnotationConfigApplicationContext refresh 
WARNING: Exception encountered during context initialization - cancelling refresh attempt 
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'userMapper' defined in com.poc.test.spring4app.config.AppConfiguration: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [com.poc.test.spring4app.mapper.UserMapper]: Factory method 'userMapper' threw exception; nested exception is org.apache.ibatis.binding.BindingException: Type interface com.poc.test.spring4app.mapper.UserMapper is not known to the MapperRegistry. 
    at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:599) 
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateUsingFactoryMethod(AbstractAutowireCapableBeanFactory.java:1123) 
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1018) 
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:510) 
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:482) 
    at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:305) 
    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230) 
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:301) 
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:196) 
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:772) 
    at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:834) 
    at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:537) 
    at org.springframework.context.annotation.AnnotationConfigApplicationContext.<init>(AnnotationConfigApplicationContext.java:84) 
    at com.poc.test.spring4app.config.AppInitializer.main(AppInitializer.java:16) 
Caused by: org.springframework.beans.BeanInstantiationException: Failed to instantiate [com.poc.test.spring4app.mapper.UserMapper]: Factory method 'userMapper' threw exception; nested exception is org.apache.ibatis.binding.BindingException: Type interface com.poc.test.spring4app.mapper.UserMapper is not known to the MapperRegistry. 
    at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:189) 
    at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:588) 
    ... 13 more 
Caused by: org.apache.ibatis.binding.BindingException: Type interface com.poc.test.spring4app.mapper.UserMapper is not known to the MapperRegistry. 
    at org.apache.ibatis.binding.MapperRegistry.getMapper(MapperRegistry.java:47) 
    at org.apache.ibatis.session.Configuration.getMapper(Configuration.java:675) 
    at org.mybatis.spring.SqlSessionTemplate.getMapper(SqlSessionTemplate.java:293) 
    at com.poc.test.spring4app.config.AppConfiguration.userMapper(AppConfiguration.java:51) 
    at com.poc.test.spring4app.config.AppConfiguration$$EnhancerBySpringCGLIB$$8dd4b125.CGLIB$userMapper$0(<generated>) 
    at com.poc.test.spring4app.config.AppConfiguration$$EnhancerBySpringCGLIB$$8dd4b125$$FastClassBySpringCGLIB$$677c8295.invoke(<generated>) 
    at org.springframework.cglib.proxy.MethodProxy.invokeSuper(MethodProxy.java:228) 
    at org.springframework.context.annotation.ConfigurationClassEnhancer$BeanMethodInterceptor.intercept(ConfigurationClassEnhancer.java:318) 
    at com.poc.test.spring4app.config.AppConfiguration$$EnhancerBySpringCGLIB$$8dd4b125.userMapper(<generated>) 
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) 
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) 
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) 
    at java.lang.reflect.Method.invoke(Method.java:497) 
    at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:162) 
    ... 14 more

的應用問題已經運行罰款使用JDK 1.7 &春天3.2.2。但是由於JDK升級需要Spring 4，所以我正面臨這些兼容性問題。

下面是示例代碼的詳細信息。以下POC基於此blog中的示例。感謝Mike。如果我將Spring版本從4.2.1更改爲3.2.9，該應用可以正常工作。在4.2.1的情況下，我得到了上述例外。

POM

<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>com.poc.test</groupId> 
<artifactId>spring4app</artifactId> 
<version>0.0.1-SNAPSHOT</version> 
<packaging>jar</packaging> 

<name>Spring4App</name> 
<url>http://maven.apache.org</url> 

<properties> 
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding> 
    <spring.version>4.2.1.RELEASE</spring.version> 
    <spring-batch.version>3.0.5.RELEASE</spring-batch.version> 
    <mybatisVersion>3.3.0</mybatisVersion> 
    <mybatisSpringVersion>1.2.3</mybatisSpringVersion> 
</properties> 

<dependencies> 
    <dependency> 
     <groupId>org.springframework</groupId> 
     <artifactId>spring-core</artifactId> 
     <version>${spring.version}</version> 
    </dependency> 
    <dependency> 
     <groupId>org.springframework</groupId> 
     <artifactId>spring-context</artifactId> 
     <version>${spring.version}</version> 
    </dependency> 
    <dependency> 
     <groupId>org.springframework</groupId> 
     <artifactId>spring-context-support</artifactId> 
     <version>${spring.version}</version> 
    </dependency> 
    <dependency> 
     <groupId>org.springframework</groupId> 
     <artifactId>spring-tx</artifactId> 
     <version>${spring.version}</version> 
    </dependency> 
    <dependency> 
     <groupId>org.springframework</groupId> 
     <artifactId>spring-orm</artifactId> 
     <version>${spring.version}</version> 
    </dependency> 
    <dependency> 
     <groupId>org.springframework.batch</groupId> 
     <artifactId>spring-batch-core</artifactId> 
     <version>${spring-batch.version}</version> 
    </dependency> 
    <dependency> 
     <groupId>org.springframework.batch</groupId> 
     <artifactId>spring-batch-test</artifactId> 
     <version>${spring-batch.version}</version> 
    </dependency> 
    <dependency> 
     <groupId>org.springframework</groupId> 
     <artifactId>spring-jdbc</artifactId> 
     <version>${spring.version}</version> 
    </dependency> 
    <dependency> 
     <groupId>org.springframework</groupId> 
     <artifactId>spring-test</artifactId> 
     <version>${spring.version}</version> 
    </dependency> 
    <!-- DB RELATED --> 
    <dependency> 
     <groupId>org.mybatis</groupId> 
     <artifactId>mybatis</artifactId> 
     <version>${mybatisVersion}</version> 
    </dependency> 
    <dependency> 
     <groupId>org.mybatis</groupId> 
     <artifactId>mybatis-spring</artifactId> 
     <version>${mybatisSpringVersion}</version> 
    </dependency> 
    <!-- Binding for Log4J --> 
    <dependency> 
     <groupId>junit</groupId> 
     <artifactId>junit</artifactId> 
     <version>4.11</version> 
    </dependency> 
    <!-- H2Db related --> 
    <dependency> 
     <groupId>com.h2database</groupId> 
     <artifactId>h2</artifactId> 
     <version>1.3.167</version> 
    </dependency> 
</dependencies> 
<build> 
    <finalName>Spring4App</finalName> 
    <plugins> 
     <plugin> 
      <groupId>org.apache.maven.plugins</groupId> 
      <artifactId>maven-compiler-plugin</artifactId> 
      <version>3.3</version> 
      <configuration> 
       <source>1.8</source> 
       <target>1.8</target> 
      </configuration> 
     </plugin> 
     <plugin> 
      <groupId>org.apache.maven.plugins</groupId> 
      <artifactId>maven-surefire-plugin</artifactId> 
      <version>2.18.1</version> 
      <configuration> 
       <includes> 
        <include>**/${includeTestGroup}/**/*Test.java</include> 
       </includes> 
      </configuration> 

     </plugin> 
     <plugin> 
      <artifactId>maven-assembly-plugin</artifactId> 
      <version>2.5.3</version> 
      <configuration> 
       <descriptorRefs> 
        <descriptorRef>jar-with-dependencies</descriptorRef> 
       </descriptorRefs> 
       <finalName>Spring4App</finalName> 
       <appendAssemblyId>false</appendAssemblyId> 
      </configuration> 
      <executions> 
       <execution> 
        <id>make-assembly</id> 
        <phase>package</phase> 
        <goals> 
         <goal>single</goal> 
        </goals> 
       </execution> 
      </executions> 
     </plugin> 
     <plugin> 
      <groupId>org.apache.maven.plugins</groupId> 
      <artifactId>maven-jar-plugin</artifactId> 
      <version>2.6</version> 
      <executions> 
       <execution> 
        <goals> 
         <goal>test-jar</goal> 
        </goals> 
       </execution> 
      </executions> 
     </plugin> 
    </plugins> 
</build>

AppInitializer

package com.poc.test.spring4app.config; 

import java.util.List; 

import org.springframework.context.annotation.AnnotationConfigApplicationContext; 
import org.springframework.context.support.AbstractApplicationContext; 

import com.poc.test.spring4app.domain.User; 
import com.poc.test.spring4app.mapper.UserMapper; 

public class AppInitializer { 

    public static void main(String[] args) { 
     AbstractApplicationContext context = null; 
     try { 
      context = new AnnotationConfigApplicationContext(
        AppConfiguration.class); 
      context.registerShutdownHook(); 
      UserMapper userMapper = context.getBean(UserMapper.class); 
      List<User> users = userMapper.getAllUsers(); 
      System.out.println(users.toString()); 
      context.close(); 
     } 
     catch (final Exception e) { 
      if (context != null) { 
       context.close(); 
      } 
     } 
    } 
}

AppConfiguration

package com.poc.test.spring4app.config; 

import javax.sql.DataSource; 

import org.mybatis.spring.SqlSessionFactoryBean; 
import org.mybatis.spring.SqlSessionTemplate; 
import org.mybatis.spring.annotation.MapperScan; 
import org.springframework.context.annotation.Bean; 
import org.springframework.context.annotation.Configuration; 
import org.springframework.jdbc.core.JdbcTemplate; 
import org.springframework.jdbc.datasource.DataSourceTransactionManager; 
import org.springframework.jdbc.datasource.SimpleDriverDataSource; 

import com.poc.test.spring4app.mapper.UserMapper; 

@Configuration 
@MapperScan("com.poc.test.spring4app.mapper") 
public class AppConfiguration { 

    @Bean 
    public DataSource dataSource() { 
     SimpleDriverDataSource dataSource = new SimpleDriverDataSource(); 
     dataSource.setDriverClass(org.h2.Driver.class); 
     dataSource.setUsername("sa"); 
     dataSource.setUrl("jdbc:h2:mem:testdb;DB_CLOSE_DELAY=-1;DB_CLOSE_ON_EXIT=FALSE"); 
     dataSource.setPassword(""); 
     // create a table and populate some data 
     JdbcTemplate jdbcTemplate = new JdbcTemplate(dataSource); 
     System.out.println("Creating tables"); 
     jdbcTemplate.execute("drop table users if exists"); 
     jdbcTemplate.execute("create table users(id serial, firstName varchar(255), lastName varchar(255), email varchar(255))"); 
     jdbcTemplate.update("INSERT INTO users(firstName, lastName, email) values (?,?,?)", "FirstName", "LastName", "[email protected]"); 
     return dataSource; 
    } 

    @Bean 
    public DataSourceTransactionManager transactionManager() { 
     return new DataSourceTransactionManager(dataSource()); 
    } 
    @Bean 
    public SqlSessionFactoryBean sqlSessionFactory() throws Exception { 
     SqlSessionFactoryBean sessionFactory = new SqlSessionFactoryBean(); 
     sessionFactory.setDataSource(dataSource()); 
     sessionFactory.setTypeAliasesPackage("com.poc.test.spring4app.mapper"); 
     return sessionFactory; 
    } 

    @Bean 
    public UserMapper userMapper() throws Exception { 
     final SqlSessionTemplate sessionTemplate = new SqlSessionTemplate(sqlSessionFactory().getObject()); 
     return sessionTemplate.getMapper(UserMapper.class); 
    } 
}

用戶映射

package com.poc.test.spring4app.mapper; 

import java.util.List; 

import org.apache.ibatis.annotations.Result; 
import org.apache.ibatis.annotations.Results; 
import org.apache.ibatis.annotations.Select; 

import com.poc.test.spring4app.domain.User; 

public interface UserMapper { 

    @Select("select id, firstName, lastName, email from users") 
    @Results(value={ 
      @Result(column="id", property="id"), 
      @Result(column="firstName", property="firstName"), 
      @Result(column="lastName", property="lastName"), 
      @Result(column="email", property="email") 
    }) 
    List<User> getAllUsers(); 

}

用戶

package com.poc.test.spring4app.domain; 

import java.io.Serializable; 

public class User implements Serializable { 

    private static final long serialVersionUID = 1L; 
    private long id; 
    private String firstName; 
    private String lastName; 
    private String email; 
    /** 
    * @return the id 
    */ 
    public long getId() { 
     return id; 
    } 
    /** 
    * @param id the id to set 
    */ 
    public void setId(long id) { 
     this.id = id; 
    } 
    /** 
    * @return the firstName 
    */ 
    public String getFirstName() { 
     return firstName; 
    } 
    /** 
    * @param firstName the firstName to set 
    */ 
    public void setFirstName(String firstName) { 
     this.firstName = firstName; 
    } 
    /** 
    * @return the lastName 
    */ 
    public String getLastName() { 
     return lastName; 
    } 
    /** 
    * @param lastName the lastName to set 
    */ 
    public void setLastName(String lastName) { 
     this.lastName = lastName; 
    } 
    /** 
    * @return the email 
    */ 
    public String getEmail() { 
     return email; 
    } 
    /** 
    * @param email the email to set 
    */ 
    public void setEmail(String email) { 
     this.email = email; 
    } 

    // getters and setters 

}

來源

2015-09-28 gsndev

我們使用Java 8，Spring 4，Spring Boot以及最新的MyBatis和mybatis-spring。這個堆棧沒有問題。顯示代碼。 – luboskrnac

@luboskrnac我用代碼更新了問題。提前致謝。 – gsndev

我相信這可能是你的問題：

WARNING: Skipping MapperFactoryBean with name 'userMapper' and 'com.poc.test.spring4app.mapper.UserMapper' mapperInterface. Bean already defined with the same name!

嘗試刪除口是心非。

解決的問題：

使用Spring 4周&的MyBatis 3，映射器不應當明確，如果你已經@MapperScan掃描MyBatis的映射器實現定義。 bean的實例化是自動處理的。

來源

2015-09-29 15:47:07 luboskrnac

感謝您指出luboskrnac！這個POC有所幫助;我在我的實際應用程序中發現了Spring警告，所以可能會錯過它。但是你有一個想法，爲什麼它在Spring 3.x而不是4？ – gsndev

對不起，沒有線索，沒有機會在Spring 3中使用MyBatis。在我的Spring 3天中使用了不同的庫。 – luboskrnac

彈簧4 + MyBatis的整合使用Java 8

回答

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