SSM框架整合遇到的问题汇总(Spring+SpringMVC+Mybatis+PostgreSQL+Tomcat7+Maven)v.18

版权声明：本文为博主原创文章，转载请注明出处哦。 https://blog.csdn.net/timo1160139211/article/details/78024463

• 在学习整合spring+springMVC+Mybatis过程中遇到的问题全部整理罗列如此。供自己以后翻阅使用。也方便大家学习和交流。

• 欢迎翻阅GitHub查找全部代码

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一

问题一:mybatis生成的映射文件1 (mapper.xml)找不到：

信息: At least one JAR was scanned for TLDs yet contained no TLDs. Enable debug logging for this logger for a complete list of JARs that were scanned but no TLDs were found in them. Skipping unneeded JARs during scanning can improve startup time and JSP compilation time.
[org.springframework.web.context.ContextLoader] - Root WebApplicationContext: initialization started
  [org.springframework.web.context.support.XmlWebApplicationContext] - Refreshing Root WebApplicationContext: startup date [Mon Sep 18 21:59:28 CST 2017]; root of context hierarchy
  [org.springframework.beans.factory.xml.XmlBeanDefinitionReader] - Loading XML bean definitions from class path resource [spring-mybatis.xml]
  [org.springframework.beans.factory.config.PropertyPlaceholderConfigurer] - Loading properties file from class path resource [jdbc.properties]
  [org.springframework.beans.factory.support.DefaultListableBeanFactory] - Bean creation exception on non-lazy FactoryBean type check: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'userMapper' defined in file [/home/gaoyisheng/devel/tomcat/Tomcat-7.0.81/webapps/${fileName}/WEB-INF/classes/site/gaoyisheng/dao/UserMapper.class]: Cannot resolve reference to bean 'sqlSessionFactory' while setting bean property 'sqlSessionFactory'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'sqlSessionFactory' defined in class path resource [spring-mybatis.xml]: Initialization of bean failed; nested exception is org.springframework.beans.TypeMismatchException: Failed to convert property value of type 'java.lang.String' to required type 'org.springframework.core.io.Resource[]' for property 'mapperLocations'; nested exception is java.lang.IllegalArgumentException: Could not resolve resource location pattern [classpath:site/gaoyisheng/mapping/*.xml]: class path resource [site/gaoyisheng/mapping/] cannot be resolved to URL because it does not exist
  [org.springframework.beans.factory.support.DefaultListableBeanFactory] - Bean creation exception on non-lazy FactoryBean type check: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'userMapper' defined in file [/home/gaoyisheng/devel/tomcat/Tomcat-7.0.81/webapps/${fileName}/WEB-INF/classes/site/gaoyisheng/dao/UserMapper.class]: Cannot resolve reference to bean 'sqlSessionFactory' while setting bean property 'sqlSessionFactory'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'sqlSessionFactory' defined in class path resource [spring-mybatis.xml]: Initialization of bean failed; nested exception is org.springframework.beans.TypeMismatchException: Failed to convert property value of type 'java.lang.String' to required type 'org.springframework.core.io.Resource[]' for property 'mapperLocations'; nested exception is java.lang.IllegalArgumentException: Could not resolve resource location pattern [classpath:site/gaoyisheng/mapping/*.xml]: class path resource [site/gaoyisheng/mapping/] cannot be resolved to URL because it does not exist
  [org.springframework.web.context.support.XmlWebApplicationContext] - Exception encountered during context initialization - cancelling refresh attempt: org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'userController': Unsatisfied dependency expressed through field 'userService'; nested exception is org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'userService': Unsatisfied dependency expressed through field 'userDao'; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type 'site.gaoyisheng.dao.UserMapper' available: expected at least 1 bean which qualifies as autowire candidate. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true)}
Related cause: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'userMapper' defined in file [/home/gaoyisheng/devel/tomcat/Tomcat-7.0.81/webapps/${fileName}/WEB-INF/classes/site/gaoyisheng/dao/UserMapper.class]: Cannot resolve reference to bean 'sqlSessionFactory' while setting bean property 'sqlSessionFactory'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'sqlSessionFactory' defined in class path resource [spring-mybatis.xml]: Initialization of bean failed; nested exception is org.springframework.beans.TypeMismatchException: Failed to convert property value of type 'java.lang.String' to required type 'org.springframework.core.io.Resource[]' for property 'mapperLocations'; nested exception is java.lang.IllegalArgumentException: Could not resolve resource location pattern [classpath:site/gaoyisheng/mapping/*.xml]: class path resource [site/gaoyisheng/mapping/] cannot be resolved to URL because it does not exist
Related cause: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'userMapper' defined in file [/home/gaoyisheng/devel/tomcat/Tomcat-7.0.81/webapps/${fileName}/WEB-INF/classes/site/gaoyisheng/dao/UserMapper.class]: Cannot resolve reference to bean 'sqlSessionFactory' while setting bean property 'sqlSessionFactory'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'sqlSessionFactory' defined in class path resource [spring-mybatis.xml]: Initialization of bean failed; nested exception is org.springframework.beans.TypeMismatchException: Failed to convert property value of type 'java.lang.String' to required type 'org.springframework.core.io.Resource[]' for property 'mapperLocations'; nested exception is java.lang.IllegalArgumentException: Could not resolve resource location pattern [classpath:site/gaoyisheng/mapping/*.xml]: class path resource [site/gaoyisheng/mapping/] cannot be resolved to URL because it does not exist
  [org.springframework.web.context.ContextLoader] - Context initialization failed
  org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'userController': Unsatisfied dependency expressed through field 'userService'; nested exception is org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'userService': Unsatisfied dependency expressed through field 'userDao'; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type 'site.gaoyisheng.dao.UserMapper' available: expected at least 1 bean which qualifies as autowire candidate. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true)}
Related cause: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'userMapper' defined in file [/home/gaoyisheng/devel/tomcat/Tomcat-7.0.81/webapps/${fileName}/WEB-INF/classes/site/gaoyisheng/dao/UserMapper.class]: Cannot resolve reference to bean 'sqlSessionFactory' while setting bean property 'sqlSessionFactory'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'sqlSessionFactory' defined in class path resource [spring-mybatis.xml]: Initialization of bean failed; nested exception is org.springframework.beans.TypeMismatchException: Failed to convert property value of type 'java.lang.String' to required type 'org.springframework.core.io.Resource[]' for property 'mapperLocations'; nested exception is java.lang.IllegalArgumentException: Could not resolve resource location pattern [classpath:site/gaoyisheng/mapping/*.xml]: class path resource [site/gaoyisheng/mapping/] cannot be resolved to URL because it does not exist
Related cause: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'userMapper' defined in file [/home/gaoyisheng/devel/tomcat/Tomcat-7.0.81/webapps/${fileName}/WEB-INF/classes/site/gaoyisheng/dao/UserMapper.class]: Cannot resolve reference to bean 'sqlSessionFactory' while setting bean property 'sqlSessionFactory'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'sqlSessionFactory' defined in class path resource [spring-mybatis.xml]: Initialization of bean failed; nested exception is org.springframework.beans.TypeMismatchException: Failed to convert property value of type 'java.lang.String' to required type 'org.springframework.core.io.Resource[]' for property 'mapperLocations'; nested exception is java.lang.IllegalArgumentException: Could not resolve resource location pattern [classpath:site/gaoyisheng/mapping/*.xml]: class path resource [site/gaoyisheng/mapping/] cannot be resolved to URL because it does not exist
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:588)

Caused by: org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'userService': Unsatisfied dependency expressed through field 'userDao'; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type 'site.gaoyisheng.dao.UserMapper' available: expected at least 1 bean which qualifies as autowire candidate. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true)}
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:588)

Caused by: org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type 'site.gaoyisheng.dao.UserMapper' available: expected at least 1 bean which qualifies as autowire candidate. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true)}
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.raiseNoMatchingBeanFound(DefaultListableBeanFactory.java:1486)
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1104)
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1066)
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:585)
    ... 72 more
Related cause:
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'userMapper' defined in file [/home/gaoyisheng/devel/tomcat/Tomcat-7.0.81/webapps/${fileName}/WEB-INF/classes/site/gaoyisheng/dao/UserMapper.class]: Cannot resolve reference to bean 'sqlSessionFactory' while setting bean property 'sqlSessionFactory'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'sqlSessionFactory' defined in class path resource [spring-mybatis.xml]: Initialization of bean failed; nested exception is org.springframework.beans.TypeMismatchException: Failed to convert property value of type 'java.lang.String' to required type 'org.springframework.core.io.Resource[]' for property 'mapperLocations'; nested exception is java.lang.IllegalArgumentException: Could not resolve resource location pattern [classpath:site/gaoyisheng/mapping/*.xml]: class path resource [site/gaoyisheng/mapping/] cannot be resolved to URL because it does not exist
    at org.springframework.beans.factory.support.BeanDefinitionValueResolver.resolveReference(BeanDefinitionValueResolver.java:359)

Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'sqlSessionFactory' defined in class path resource [spring-mybatis.xml]: Initialization of bean failed; nested exception is org.springframework.beans.TypeMismatchException: Failed to convert property value of type 'java.lang.String' to required type 'org.springframework.core.io.Resource[]' for property 'mapperLocations'; nested exception is java.lang.IllegalArgumentException: Could not resolve resource location pattern [classpath:site/gaoyisheng/mapping/*.xml]: class path resource [site/gaoyisheng/mapping/] cannot be resolved to URL because it does not exist
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:564)

Caused by: org.springframework.beans.TypeMismatchException: Failed to convert property value of type 'java.lang.String' to required type 'org.springframework.core.io.Resource[]' for property 'mapperLocations'; nested exception is java.lang.IllegalArgumentException: Could not resolve resource location pattern [classpath:site/gaoyisheng/mapping/*.xml]: class path resource [site/gaoyisheng/mapping/] cannot be resolved to URL because it does not exist
    at org.springframework.beans.AbstractNestablePropertyAccessor.convertIfNecessary(AbstractNestablePropertyAccessor.java:610)

Caused by: java.lang.IllegalArgumentException: Could not resolve resource location pattern [classpath:site/gaoyisheng/mapping/*.xml]: class path resource [site/gaoyisheng/mapping/] cannot be resolved to URL because it does not exist
    at org.springframework.core.io.support.ResourceArrayPropertyEditor.setAsText(ResourceArrayPropertyEditor.java:116)

Related cause:
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'userMapper' defined in file [/home/gaoyisheng/devel/tomcat/Tomcat-7.0.81/webapps/${fileName}/WEB-INF/classes/site/gaoyisheng/dao/UserMapper.class]: Cannot resolve reference to bean 'sqlSessionFactory' while setting bean property 'sqlSessionFactory'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'sqlSessionFactory' defined in class path resource [spring-mybatis.xml]: Initialization of bean failed; nested exception is org.springframework.beans.TypeMismatchException: Failed to convert property value of type 'java.lang.String' to required type 'org.springframework.core.io.Resource[]' for property 'mapperLocations'; nested exception is java.lang.IllegalArgumentException: Could not resolve resource location pattern [classpath:site/gaoyisheng/mapping/*.xml]: class path resource [site/gaoyisheng/mapping/] cannot be resolved to URL because it does not exist
    at org.springframework.beans.factory.support.BeanDefinitionValueResolver.resolveReference(BeanDefinitionValueResolver.java:359)

Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'sqlSessionFactory' defined in class path resource [spring-mybatis.xml]: Initialization of bean failed; nested exception is org.springframework.beans.TypeMismatchException: Failed to convert property value of type 'java.lang.String' to required type 'org.springframework.core.io.Resource[]' for property 'mapperLocations'; nested exception is java.lang.IllegalArgumentException: Could not resolve resource location pattern [classpath:site/gaoyisheng/mapping/*.xml]: class path resource [site/gaoyisheng/mapping/] cannot be resolved to URL because it does not exist
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:564)

Caused by: org.springframework.beans.TypeMismatchException: Failed to convert property value of type 'java.lang.String' to required type 'org.springframework.core.io.Resource[]' for property 'mapperLocations'; nested exception is java.lang.IllegalArgumentException: Could not resolve resource location pattern [classpath:site/gaoyisheng/mapping/*.xml]: class path resource [site/gaoyisheng/mapping/] cannot be resolved to URL because it does not exist
    at org.springframework.beans.AbstractNestablePropertyAccessor.convertIfNecessary(AbstractNestablePropertyAccessor.java:610)

Caused by: java.lang.IllegalArgumentException: Could not resolve resource location pattern [classpath:site/gaoyisheng/mapping/*.xml]: class path resource [site/gaoyisheng/mapping/] cannot be resolved to URL because it does not exist
    at org.springframework.core.io.support.ResourceArrayPropertyEditor.setAsText(ResourceArrayPropertyEditor.java:116)

原因：没有将文件添加到resources

解决办法：

pom.xml文件中引入包含依赖：

solutions:
pom.xml appends follows:

<resources>
      <resource>
        <directory>src/main/resources</directory>
        <includes>
          <include>**/*.properties</include>
          <include>**/*.xml</include>
          <include>**/*.tld</include>
        </includes>
        <filtering>false</filtering>
      </resource>
      <resource>
        <directory>src/main/java</directory>
        <includes>
          <include>**/*.properties</include>
          <include>**/*.xml</include>
          <include>**/*.tld</include>
        </includes>
        <filtering>false</filtering>
      </resource>
</resources>

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二

问题二：mappingJacksonHttpMessageConverter类找不到

question2

信息: At least one JAR was scanned for TLDs yet contained no TLDs. Enable debug logging for this logger for a complete list of JARs that were scanned but no TLDs were found in them. Skipping unneeded JARs during scanning can improve startup time and JSP compilation time.
[org.springframework.web.context.ContextLoader] - Root WebApplicationContext: initialization started
  [org.springframework.web.context.support.XmlWebApplicationContext] - Refreshing Root WebApplicationContext: startup date [Mon Sep 18 22:46:57 CST 2017]; root of context hierarchy
  [org.springframework.beans.factory.xml.XmlBeanDefinitionReader] - Loading XML bean definitions from class path resource [spring-mybatis.xml]
  [org.springframework.beans.factory.config.PropertyPlaceholderConfigurer] - Loading properties file from class path resource [jdbc.properties]
  [org.springframework.web.context.ContextLoader] - Root WebApplicationContext: initialization completed in 609 ms
  [org.springframework.web.servlet.DispatcherServlet] - FrameworkServlet 'SpringMVC': initialization started
  [org.springframework.web.context.support.XmlWebApplicationContext] - Refreshing WebApplicationContext for namespace 'SpringMVC-servlet': startup date [Mon Sep 18 22:46:58 CST 2017]; parent: Root WebApplicationContext
  [org.springframework.beans.factory.xml.XmlBeanDefinitionReader] - Loading XML bean definitions from class path resource [spring-mvc.xml]
  [org.springframework.web.context.support.XmlWebApplicationContext] - Exception encountered during context initialization - cancelling refresh attempt: org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'userController': Unsatisfied dependency expressed through field 'userService'; nested exception is org.springframework.beans.factory.CannotLoadBeanClassException: Cannot find class [org.springframework.http.converter.json.MappingJacksonHttpMessageConverter] for bean with name 'mappingJacksonHttpMessageConverter' defined in class path resource [spring-mvc.xml]; nested exception is java.lang.ClassNotFoundException: org.springframework.http.converter.json.MappingJacksonHttpMessageConverter
  [org.springframework.web.servlet.DispatcherServlet] - Context initialization failed
  org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'userController': Unsatisfied dependency expressed through field 'userService'; nested exception is org.springframework.beans.factory.CannotLoadBeanClassException: Cannot find class [org.springframework.http.converter.json.MappingJacksonHttpMessageConverter] for bean with name 'mappingJacksonHttpMessageConverter' defined in class path resource [spring-mvc.xml]; nested exception is java.lang.ClassNotFoundException: org.springframework.http.converter.json.MappingJacksonHttpMessageConverter
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:588)

Caused by: org.springframework.beans.factory.CannotLoadBeanClassException: Cannot find class [org.springframework.http.converter.json.MappingJacksonHttpMessageConverter] for bean with name 'mappingJacksonHttpMessageConverter' defined in class path resource [spring-mvc.xml]; nested exception is java.lang.ClassNotFoundException: org.springframework.http.converter.json.MappingJacksonHttpMessageConverter
    at org.springframework.beans.factory.support.AbstractBeanFactory.resolveBeanClass(AbstractBeanFactory.java:1385)

九月 18, 2017 10:46:58 下午 org.apache.catalina.startup.HostConfig deployWAR

jackson版本有问题
spring4.x依赖org.springframework.http.converter.json.MappingJackson2HttpMessageConverter

解决办法：

修改spring-mvc.xml如下：
so :change spring-mvc.xml like this:

    <!--避免IE执行AJAX时，返回JSON出现下载文件 spring 4.x supported -->
    <bean id="mappingJacksonHttpMessageConverter"
        class="org.springframework.http.converter.json.MappingJackson2HttpMessageConverter">
        <property name="supportedMediaTypes">
            <list>
                <value>text/html;charset=UTF-8</value>
            </list>
        </property>
    </bean>
    <!-- 启动SpringMVC的注解功能， -->
    <mvc:annotation-driven>
        <mvc:message-converters register-defaults="true">
            <bean
                class="org.springframework.http.converter.json.MappingJackson2HttpMessageConverter"
                p:supportedMediaTypes="*/*" />
        </mvc:message-converters>
    </mvc:annotation-driven>

from:http://blog.csdn.net/vili_sky/article/details/73105550
thanks!

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三：

问题三：jackson.core找不到

question：

  [org.springframework.web.context.support.XmlWebApplicationContext] - Exception encountered during context initialization - cancelling refresh attempt: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'mappingJacksonHttpMessageConverter': Failed to introspect bean class [org.springframework.http.converter.json.MappingJackson2HttpMessageConverter] for lookup method metadata: could not find class that it depends on; nested exception is java.lang.NoClassDefFoundError: com/fasterxml/jackson/core/JsonProcessingException
  [org.springframework.web.servlet.DispatcherServlet] - Context initialization failed
  org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'mappingJacksonHttpMessageConverter': Failed to introspect bean class [org.springframework.http.converter.json.MappingJackson2HttpMessageConverter] for lookup method metadata: could not find class that it depends on; nested exception is java.lang.NoClassDefFoundError: com/fasterxml/jackson/core/JsonProcessingException
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.determineCandidateConstructors(AutowiredAnnotationBeanPostProcessor.java:269)


Caused by: java.lang.NoClassDefFoundError: com/fasterxml/jackson/core/JsonProcessingException
    at java.lang.Class.getDeclaredMethods0(Native Method)
    at java.lang.Class.privateGetDeclaredMethods(Class.java:2701)
    at java.lang.Class.getDeclaredMethods(Class.java:1975)
    at org.springframework.util.ReflectionUtils.getDeclaredMethods(ReflectionUtils.java:613)
    at org.springframework.util.ReflectionUtils.doWithMethods(ReflectionUtils.java:524)
    at org.springframework.util.ReflectionUtils.doWithMethods(ReflectionUtils.java:510)
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.determineCandidateConstructors(AutowiredAnnotationBeanPostProcessor.java:247)
    ... 65 more
Caused by: java.lang.ClassNotFoundException: com.fasterxml.jackson.core.JsonProcessingException
    at org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1892)
    at org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1735)
    ... 72 more

解决办法：

solution:
添加maven依赖：
adding following dependencies in pom.xml

    <dependency>
        <groupId>com.fasterxml.jackson.core</groupId>
        <artifactId>jackson-core</artifactId>
        <version>2.6.3</version>
    </dependency>
    <dependency>
        <groupId>com.fasterxml.jackson.core</groupId>
        <artifactId>jackson-databind</artifactId>
        <version>2.6.3</version>
    </dependency>

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四

问题四：web容器找不到数据库驱动org.postgresql.Driver

question3

严重: Servlet.service() for servlet [SpringMVC] in context with path [/ejos] threw exception [Request processing failed; nested exception is org.mybatis.spring.MyBatisSystemException: nested exception is org.apache.ibatis.exceptions.PersistenceException: 
### Error querying database.  Cause: org.springframework.jdbc.CannotGetJdbcConnectionException: Could not get JDBC Connection; nested exception is org.apache.commons.dbcp.SQLNestedException: Cannot load JDBC driver class 'org.postgresql.Driver  '
### The error may exist in file [/home/gaoyisheng/devel/tomcat/Tomcat-7.0.81/webapps/ejos/WEB-INF/classes/site/gaoyisheng/dao/mapping/UserMapper.xml]
### The error may involve site.gaoyisheng.dao.UserMapper.selectByPrimaryKey
### The error occurred while executing a query
### Cause: org.springframework.jdbc.CannotGetJdbcConnectionException: Could not get JDBC Connection; nested exception is org.apache.commons.dbcp.SQLNestedException: Cannot load JDBC driver class 'org.postgresql.Driver  '] with root cause
java.lang.ClassNotFoundException: org.postgresql.Driver  

原因：tomcat找不到驱动class
reason:tomcat cannot find Driver class

解决办法：-将驱动jar包 手动放入web容器lib目录下

web app curtains need jar.

solution：
copy ~driver.jar to ${tomcat_home}/lib/

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五：

问题五：JDBC连接中DB用户名role “prostgres” 不存在

question

org.springframework.web.util.NestedServletException: Request processing failed; nested exception is org.mybatis.spring.MyBatisSystemException: nested exception is org.apache.ibatis.exceptions.PersistenceException: 
### Error querying database.  Cause: org.springframework.jdbc.CannotGetJdbcConnectionException: Could not get JDBC Connection; nested exception is org.apache.commons.dbcp.SQLNestedException: Cannot create PoolableConnectionFactory (FATAL: role "prostgres" does not exist)
### The error may exist in file [/home/gaoyisheng/devel/tomcat/Tomcat-7.0.81/webapps/ejos/WEB-INF/classes/site/gaoyisheng/dao/mapping/UserMapper.xml]
### The error may involve site.gaoyisheng.dao.UserMapper.selectByPrimaryKey
### The error occurred while executing a query
### Cause: org.springframework.jdbc.CannotGetJdbcConnectionException: Could not get JDBC Connection; nested exception is org.apache.commons.dbcp.SQLNestedException: Cannot create PoolableConnectionFactory (FATAL: role "prostgres" does not exist)

解决办法：

solution
check the username in jdbc.properties

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六

问题六：postgresql字段id等找不到

exception: mybatis + postgresql

org.springframework.web.util.NestedServletException: Request processing failed; nested exception is org.springframework.jdbc.BadSqlGrammarException: 
### Error querying database.  Cause: org.postgresql.util.PSQLException: ERROR: column "id" does not exist
  位置：19
### The error may exist in file [/home/gaoyisheng/devel/tomcat/Tomcat-7.0.81/webapps/ejos/WEB-INF/classes/site/gaoyisheng/dao/mapping/UserMapper.xml]
### The error may involve site.gaoyisheng.dao.UserMapper.selectByPrimaryKey-Inline
### The error occurred while setting parameters
### SQL: select            id, username, password, age         from user     where id = ?
### Cause: org.postgresql.util.PSQLException: ERROR: column "id" does not exist
  位置：19
; bad SQL grammar []; nested exception is org.postgresql.util.PSQLException: ERROR: column "id" does not exist
  位置：19
    org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:982)
    org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:861)
    javax.servlet.http.HttpServlet.service(HttpServlet.java:624)
    org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:846)
    javax.servlet.http.HttpServlet.service(HttpServlet.java:731)
    org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
    org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:197)
    org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)



root cause


org.springframework.jdbc.BadSqlGrammarException: 
### Error querying database.  Cause: org.postgresql.util.PSQLException: ERROR: column "id" does not exist
  位置：19
### The error may exist in file [/home/gaoyisheng/devel/tomcat/Tomcat-7.0.81/webapps/ejos/WEB-INF/classes/site/gaoyisheng/dao/mapping/UserMapper.xml]
### The error may involve site.gaoyisheng.dao.UserMapper.selectByPrimaryKey-Inline
### The error occurred while setting parameters
### SQL: select            id, username, password, age         from user     where id = ?
### Cause: org.postgresql.util.PSQLException: ERROR: column "id" does not exist
  位置：19
; bad SQL grammar []; nested exception is org.postgresql.util.PSQLException: ERROR: column "id" does not exist
  位置：19
    org.springframework.jdbc.support.SQLStateSQLExceptionTranslator.doTranslate(SQLStateSQLExceptionTranslator.java:99)
    org.springframework.jdbc.support.AbstractFallbackSQLExceptionTranslator.translate(AbstractFallbackSQLExceptionTranslator.java:73)
    org.springframework.jdbc.support.AbstractFallbackSQLExceptionTranslator.translate(AbstractFallbackSQLExceptionTranslator.java:81)

    org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)

解决办法：

修改SQL(mapper.xml)中表名，
solution:
in mapper.xml

  <select id="selectByPrimaryKey" parameterType="java.lang.Integer" resultMap="BaseResultMap">

    select 
    <include refid="Base_Column_List" />
    from user
    where id = #{id,jdbcType=INTEGER}
  </select>

to

from public."user"

或者 public.user

---

---

七

问题七：js、css等文件找不到

<servlet-mapping>
<servlet-name>default</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>

HTTP/1.1 404 not fond

原因：文件路径解析时被springmvc过滤了,影响资源文件的获取.

解决办法：

办法一：

更改过滤规则

<servlet-mapping>
<servlet-name>default</servlet-name>
<url-pattern>*.css</url-pattern>
</servlet-mapping>
<servlet-mapping>
<servlet-name>default</servlet-name>
<url-pattern>*.js</url-pattern>
</servlet-mapping>
<!-- ... -->
<servlet-mapping>
<servlet-name>default</servlet-name>
<url-pattern>*.jpg</url-pattern>
</servlet-mapping>

办法二

直接配置资源,web容器启动时便载入

<mvc:resources mapping="/javascript/**"
               location="/static_resources/javascript/"/>
<mvc:resources mapping="/styles/**"
               location="/static_resources/css/"/>
<mvc:resources mapping="/images/**"
               location="/static_resources/images/"/>
<mvc:default-servlet-handler /> 

参考资料：感谢！
http://blog.csdn.net/huangjie515/article/details/53509050

---

---

八

问题八parameter is not present

使用SpringMVC注解@RequestParam的”Required String parameter is not present”

controller:

@Controller
@RequestMapping("/user")
public class LoginController {

    @Autowired
    private LoginService loginService;

    @RequestMapping("/login")
    @ResponseBody
    public String login(HttpServletRequest request, Model model, @RequestParam("number") String number,
            @RequestParam("password") String password) {
    //logical code...

.jsp

    <input id="number" name="number" type="text" placeholder="登录账号"
        onkeypress="check_values();" /> 
    <input id="password" name="password" type="password" placeholder="输入密码"  
            onkeypress="check_values();" />

error:
message : Required String parameter ‘number’ is not present
description : The request sent by the client was syntactically incorrect.

参数在语法上匹配不上…

｛还有偶遇其他问题：
cannot be translated into a null value
Consider declaring it as object wrapper for the corresponding primitive type
｝

思路：

1. 检查 @RequestParam (value = “action” 的值
2. 检查 @ResponseBody 的错用 (参考)
3. 检查

解决办法：

参考：
http://blog.csdn.net/qq_26761587/article/details/73691189

http://blog.csdn.net/hellostory/article/details/7519358

九

问题九Parameter ‘xx’ not found

Request processing failed; nested exception is org.mybatis.spring.MyBatisSystemException: nested exception is org.apache.ibatis.binding.BindingException: Parameter ‘number’ not found. Available parameters are [arg1, arg0, param1, param2]

    <select id="selectByNumberAndPassword" resultType="site.gaoyisheng.pojo.User">
        <!-- by GaoYisheng | for login -->
        select
        u
        from public."user" u
        where u.number = #{number,jdbcType=CHAR}
        And u.password = #{password,jdbcType=CHAR}
    </select>

原因：
mybatis不识别parameter ‘xx’

解决办法：

一：将命名传参改为序号传参

二：

参考资料：
http://www.cnblogs.com/yangchas/p/7383841.html

十

问题十 Can’t find bundle for base name javax.servlet.LocalStrings, locale zh_CN

  [ERROR] [2017-10-07 14:40:03][org.springframework.test.context.TestContextManager]Caught exception while allowing TestExecutionListener [org.springframework.test.context.web.ServletTestExecutionListener@7dc7cbad] to prepare test instance [me.test.UserOpsTest@7c541c15]
  [org.springframework.test.context.TestContextManager] - Caught exception while allowing TestExecutionListener [org.springframework.test.context.web.ServletTestExecutionListener@7dc7cbad] to prepare test instance [me.test.UserOpsTest@7c541c15]
  java.lang.ExceptionInInitializerError
    at org.springframework.mock.web.MockHttpServletResponse.<init>(MockHttpServletResponse.java:86)
    at org.springframework.test.context.web.ServletTestExecutionListener.setUpRequestContextIfNecessary(ServletTestExecutionListener.java:209)

Caused by: java.util.MissingResourceException: Can't find bundle for base name javax.servlet.LocalStrings, locale zh_CN
    at java.util.ResourceBundle.throwMissingResourceException(ResourceBundle.java:1564)

    ... 25 more

原因：

缺少WEB服务运行环境的相关依赖包。

解决办法：

通过build path 添加依赖包
1.项目右键，build path ->

• 

2.添加依赖：

• 

3.添加倚赖：运行时

• 

4.选择容器：

• 

5.添加完成如下：

• 

6.问题迎刃而解：

• 

参考资料：
http://www.cnblogs.com/xdp-blog/p/6168889.html

十一

问题十一 SerializationFailedException: Failed to serialize object using DefaultSerializer

cacheable注解方法缓存实体类List时报错:

Request processing failed; nested exception is org.springframework.data.redis.serializer.SerializationException: Cannot serialize; nested exception is org.springframework.core.serializer.support.SerializationFailedException: Failed to serialize object using DefaultSerializer; nested exception is java.io.NotSerializableException: site.gaoyisheng.pojo.User

User类如下:

package site.gaoyisheng.pojo;

public class User {
    private Integer id;
    private String number;

    /* setter and getter */
}

原因:

实体类没有实现序列化接口。

解决办法:

实现 Serializable 接口

package site.gaoyisheng.pojo;

import java.io.Serializable;

public class User implements Serializable{
    private static final long serialVersionUID = -48880431122099985L;
    private Integer id;
    private String number;

    /* setter and getter */
}

十二

问题十二 The superclass “javax.servlet.http.HttpServlet” was not found on the Java Build Path

新maven项目jsp页面报错如下：

The superclass “javax.servlet.http.HttpServlet” was not found on the Java Build Path

原因: javax.api jar包未引入。

解决办法:引入jar包。

在pom.xml文件中加入:(或者自行将jar包加入依赖)

        <dependency>
            <groupId>javax</groupId>
            <artifactId>javaee-api</artifactId>
            <version>7.0</version>
        </dependency>

十三

问题十三 cannot change version of project facet Dynamic Web Module to 3.0

maven webapp + eclipse 创建项目的时候 Dynamic Web Module 的版本切换不了。他要求说 JAVA版本要大于等于1.6。明明JDK也换了，就是不行。

原因:

这应该是Eclipse的一个BUG，就算你后来修改JDK Setting为1.6以上，但是配置文件中的配置不会被修改。需要去手动修改。

解决办法:

手动修改 [ 项目目录下的 ] [.setting] 目录下的
org.eclipse.wst.common.project.facet.core.xml 文件

<?xml version="1.0" encoding="UTF-8"?>
<faceted-project>
  <runtime name="Apache Tomcat v7.0"/>
  <fixed facet="wst.jsdt.web"/>
  <installed facet="jst.web" version="3.0"/>
  <installed facet="wst.jsdt.web" version="1.0"/>
  <installed facet="java" version="1.8"/>
</faceted-project>

你的 “jst.web” 和 “java” 的版本值( version= )可能会有问题。修改为你想要的即可。

十四

问题十四 Result Maps collection already contains value for *.ThesisMapper.BaseResultMap

问题描述:
generater自动映射完 ,报错:

java.lang.IllegalStateException: Failed to load ApplicationContext


Caused by: org.springframework.core.NestedIOException: Failed to parse mapping resource: 'file [/home/gaoyisheng/git/trans/target/classes/site/gaoyisheng/dao/mapping/ThesisMapper.xml]'; nested exception is org.apache.ibatis.builder.BuilderException: Error parsing Mapper XML. Cause: java.lang.IllegalArgumentException: Result Maps collection already contains value for site.gaoyisheng.dao.ThesisMapper.TheBaseResultMap

Caused by: org.apache.ibatis.builder.BuilderException: Error parsing Mapper XML. Cause: java.lang.IllegalArgumentException: Result Maps collection already contains value for site.gaoyisheng.dao.ThesisMapper.TheBaseResultMap


Caused by: java.lang.IllegalArgumentException: Result Maps collection already contains value for site.gaoyisheng.dao.ThesisMapper.TheBaseResultMap

原因:mapper.xml中 \< BaseResultMap> 生成了两次。

解决办法:
检查logger中指出的mapper.xml文件，删除重复部分即可。

参考资料:
http://wlb.wlb.blog.163.com/blog/static/46741320154145185741/

---

十五

问题十五 column “xxx” does not exist

握此处的字段为 : 未认领
column “未认领” does not exist
源码

<select id="selectByStatus" resultMap="BaseResultMap">
        select
        <include refid="Base_Column_List" />
        from en_periodical_thesis e
        where e.claim_status = "未认领"
</select>

<select id="selectByStatus" resultMap="BaseResultMap">
        select
        <include refid="Base_Column_List" />
        from en_periodical_thesis e
        where e.claim_status = ${status}
</select>

报错:

**org.springframework.jdbc.BadSqlGrammarException:** 
Error querying database.  Cause: org.postgresql.util.PSQLException: ERROR: column "未认领" does not exist
  建议：Perhaps you meant to reference the column "e.id".
  位置：554
The error may exist in file [/home/gaoyisheng/git/trans/target/classes/site/gaoyisheng/mapping/EnPeriodicalThesisMapper.xml]
### The error may involve defaultParameterMap
### The error occurred while setting parameters
### SQL: select   claim_status      from en_periodical_thesis e   where e.claim_status = 未认领
### Cause: org.postgresql.util.PSQLException: ERROR: column "未认领" does not exist
  建议：Perhaps you meant to reference the column "e.id".
  位置：554
; bad SQL grammar []; nested exception is org.postgresql.util.PSQLException: ERROR: column "未认领" does not exist
  建议：Perhaps you meant to reference the column "e.id".
  位置：554

Caused by: org.postgresql.util.PSQLException: ERROR: column "未认领" does not exist
  建议：Perhaps you meant to reference the column "e.id".
  位置：554

原因:
1. #区别于$,此处应用#
2. 或者 “” 改为 ’ ‘

---

十六

问题十六 javax.naming.NameNotFoundException:

Converted JNDI name [java:comp/env/spring.liveBeansView.mbeanDomain] not found - trying original name [spring.liveBeansView.mbeanDomain]. javax.naming.NameNotFoundException: Name [spring.liveBeansView.mbeanDomain] is not bound in this Context. Unable to find [spring.liveBeansView.mbeanDomain].

原因：

不明

解决办法：

web.xml 添加:

<context-param>
        <param-name>spring.profiles.active</param-name>  
        <param-value>dev</param-value>  
</context-param>  
<context-param>  
        <param-name>spring.profiles.default</param-name>  
        <param-value>dev</param-value>  
</context-param>
<context-param>  
        <param-name>spring.liveBeansView.mbeanDomain</param-name>  
        <param-value>dev</param-value>  
</context-param>

Found key 'spring.liveBeansView.mbeanDomain' in [servletContextInitParams] with type [String]

参考资料:
https://stackoverflow.com/questions/23750619/spring-jndi-namingexception-name-spring-livebeansview-mbeandomain-is-not-boun
https://oschina.net/question/238156_135712

十七

问题十七 SpringMVC response返回前台的汉字乱码’?’:

解决办法:

1.

response.setContentType("application/json;charset=UTF-8");//防止数据传递乱码

2.
我使用的Springmvc，在controller层传输一个json到前台，后台显示没问题，中文正常显示而到了前台

中文就变成了问号。

后来发现，因为在controller中返回json用了@ResponseBody，而spring源码中@ResponseBody 的实现类发现其默认的编码是 iso-8859-1，而项目用的编码为utf-8,所以传中文会出现乱码。

这里我使用了注解来解决：

@RequestMapping(value="/echarts.do", produces = "application/json; charset=utf-8")   

这种方法比较适用于新版本的spring，本项目的版本：

<spring.version>4.1.4.RELEASE</spring.version>  

参考:

http://blog.csdn.net/kalision/article/details/46441081
http://blog.csdn.net/qq_32715873/article/details/54581133

十八

问题十八 批量插入时JDBC参数超出数量限制:

java.io.IOException: Tried to send an out-of-range integer as a 2-byte value: 40000

解决办法:
将数据进行分割，分别插入。

---

1. mapper.xml ↩