Question

我刚开始学习春天。我试图使用spring从我的数据库中获取数据，但是从xml文件中获得异常。我不知道这个问题是什么，我搜索了很多但无法修复它。请帮帮我。任何帮助，将不胜感激。提前谢谢。

主类

package com.spring.demo;

import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

public class MainApp {

    @SuppressWarnings("resource")
    public static void main(String[] args) {


        ApplicationContext cntxt = new ClassPathXmlApplicationContext("spring.xml");
        JdbcDaoImpl dao = cntxt.getBean("JdbcDaoImpl", JdbcDaoImpl.class);
        UserModel model = dao.getUserName("admin");


        model.display();
   }
}

DAO IMPLI

package com.spring.demo;

import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;

import javax.sql.DataSource;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;
@Component
public class JdbcDaoImpl {
    @Autowired
    private DataSource dataSource;

    public DataSource getDataSource() {
        return dataSource;
    }

    public void setDataSource(DataSource dataSource) {
        this.dataSource = dataSource;
    }

    public UserModel getUserName(String userName){
        Connection con = null;

        try{
            con = dataSource.getConnection();
            PreparedStatement ps = con.prepareStatement("select * from userinfo where userName = ?");
            ps.setString(1, "vaibhav");
            UserModel model = null;
            ResultSet rs = ps.executeQuery();
            if(rs.next()){
                model = new UserModel();
                model.setUserName(rs.getString("userName"));
            }
            rs.close();
            ps.close(); 
            return model;
        }
        catch(Exception e){
            throw new RuntimeException(e);
        }
        finally{
            try{
                con.close();
            }
            catch(SQLException s){

            }
        }
    }



}

SPRING.XML

<?xml version="1.0" encoding="UTF-8"?>
<beans:beans xmlns="http://www.springframework.org/schema/mvc"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xmlns:beans="http://www.springframework.org/schema/beans"
    xmlns:jdbc="http://www.springframework.org/schema/jdbc"
    xmlns:context="http://www.springframework.org/schema/context"
    xsi:schemaLocation="
    http://www.springframework.org/schema/beans
    http://www.springframework.org/schema/beans/spring-beans-2.5.xsd
    http://www.springframework.org/schema/aop
    http://www.springframework.org/schema/aop/spring-aop-2.5.xsd
    http://www.springframework.org/schema/tx
    http://www.springframework.org/schema/tx/spring-tx-2.5.xsd
    http://www.springframework.org/schema/context
    http://www.springframework.org/schema/context/spring-context.xsd">
   <context:annotation-config />
   <context:component-scan base-package="com.spring.demo" />


   <bean id ="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
   <property name="driverClassName" value="com.mysql.jdbc.Driver" /> 
   <property name="url" value="jdbc:mysql://localhost:3306/testing" />
   <property name="userName" value="vaibhav" />
   <property name="password" value="bhopal@123" />
   </bean> 

</beans>

控制台

Dec 05, 2015 12:10:16 PM org.springframework.context.support.ClassPathXmlApplicationContext prepareRefresh
INFO: Refreshing org.springframework.context.support.ClassPathXmlApplicationContext@1c12fb0: startup date [Sat Dec 05 12:10:16 IST 2015]; root of context hierarchy
Dec 05, 2015 12:10:16 PM org.springframework.beans.factory.xml.XmlBeanDefinitionReader loadBeanDefinitions
INFO: Loading XML bean definitions from class path resource [spring.xml]
Exception in thread "main" org.springframework.beans.factory.xml.XmlBeanDefinitionStoreException: Line 20 in XML document from class path resource [spring.xml] is invalid; nested exception is org.xml.sax.SAXParseException; lineNumber: 20; columnNumber: 69; cvc-complex-type.2.4.c: The matching wildcard is strict, but no declaration can be found for element 'property'.
    at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.doLoadBeanDefinitions(XmlBeanDefinitionReader.java:399)
    at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.loadBeanDefinitions(XmlBeanDefinitionReader.java:336)
    at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.loadBeanDefinitions(XmlBeanDefinitionReader.java:304)
    at org.springframework.beans.factory.support.AbstractBeanDefinitionReader.loadBeanDefinitions(AbstractBeanDefinitionReader.java:181)
    at org.springframework.beans.factory.support.AbstractBeanDefinitionReader.loadBeanDefinitions(AbstractBeanDefinitionReader.java:217)
    at org.springframework.beans.factory.support.AbstractBeanDefinitionReader.loadBeanDefinitions(AbstractBeanDefinitionReader.java:188)
    at org.springframework.beans.factory.support.AbstractBeanDefinitionReader.loadBeanDefinitions(AbstractBeanDefinitionReader.java:252)
    at org.springframework.context.support.AbstractXmlApplicationContext.loadBeanDefinitions(AbstractXmlApplicationContext.java:127)
    at org.springframework.context.support.AbstractXmlApplicationContext.loadBeanDefinitions(AbstractXmlApplicationContext.java:93)
    at org.springframework.context.support.AbstractRefreshableApplicationContext.refreshBeanFactory(AbstractRefreshableApplicationContext.java:129)
    at org.springframework.context.support.AbstractApplicationContext.obtainFreshBeanFactory(AbstractApplicationContext.java:608)
    at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:509)
    at org.springframework.context.support.ClassPathXmlApplicationContext.<init>(ClassPathXmlApplicationContext.java:139)
    at org.springframework.context.support.ClassPathXmlApplicationContext.<init>(ClassPathXmlApplicationContext.java:83)
    at com.spring.demo.MainApp.main(MainApp.java:12)
Caused by: org.xml.sax.SAXParseException; lineNumber: 20; columnNumber: 69; cvc-complex-type.2.4.c: The matching wildcard is strict, but no declaration can be found for element 'property'.
    at com.sun.org.apache.xerces.internal.util.ErrorHandlerWrapper.createSAXParseException(Unknown Source)
    at com.sun.org.apache.xerces.internal.util.ErrorHandlerWrapper.error(Unknown Source)
    at com.sun.org.apache.xerces.internal.impl.XMLErrorReporter.reportError(Unknown Source)
    at com.sun.org.apache.xerces.internal.impl.XMLErrorReporter.reportError(Unknown Source)
    at com.sun.org.apache.xerces.internal.impl.XMLErrorReporter.reportError(Unknown Source)
    at com.sun.org.apache.xerces.internal.impl.xs.XMLSchemaValidator$XSIErrorReporter.reportError(Unknown Source)
    at com.sun.org.apache.xerces.internal.impl.xs.XMLSchemaValidator.reportSchemaError(Unknown Source)
    at com.sun.org.apache.xerces.internal.impl.xs.XMLSchemaValidator.handleStartElement(Unknown Source)
    at com.sun.org.apache.xerces.internal.impl.xs.XMLSchemaValidator.emptyElement(Unknown Source)
    at com.sun.org.apache.xerces.internal.impl.XMLNSDocumentScannerImpl.scanStartElement(Unknown Source)
    at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl$FragmentContentDriver.next(Unknown Source)
    at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl.next(Unknown Source)
    at com.sun.org.apache.xerces.internal.impl.XMLNSDocumentScannerImpl.next(Unknown Source)
    at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanDocument(Unknown Source)
    at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(Unknown Source)
    at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(Unknown Source)
    at com.sun.org.apache.xerces.internal.parsers.XMLParser.parse(Unknown Source)
    at com.sun.org.apache.xerces.internal.parsers.DOMParser.parse(Unknown Source)
    at com.sun.org.apache.xerces.internal.jaxp.DocumentBuilderImpl.parse(Unknown Source)
    at org.springframework.beans.factory.xml.DefaultDocumentLoader.loadDocument(DefaultDocumentLoader.java:76)
    at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.doLoadDocument(XmlBeanDefinitionReader.java:429)
    at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.doLoadBeanDefinitions(XmlBeanDefinitionReader.java:391)
    ... 14 more

Answer 1

您的xml命名空间似乎已损坏。当你在xml中使用bean时。使用beans作为默认命名空间。已更正了spring.xml并成功验证了它。因此，下面的xml代码段应该适合您。

 <?xml version="1.0" encoding="UTF-8"?>
 <beans xmlns="http://www.springframework.org/schema/beans"
  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"  xmlns:mvc="http://www.springframework.org/schema/mvc"
  xmlns:jdbc="http://www.springframework.org/schema/jdbc"   xmlns:context="http://www.springframework.org/schema/context"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-2.5.xsd
http://www.springframework.org/schema/aop
http://www.springframework.org/schema/aop/spring-aop-2.5.xsd
http://www.springframework.org/schema/tx
http://www.springframework.org/schema/tx/spring-tx-2.5.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context.xsd
http://www.springframework.org/schema/mvc
http://www.springframework.org/schema/mvc/spring-mvc.xsd
http://www.springframework.org/schema/jdbc
http://www.springframework.org/schema/jdbc/spring-jdbc.xsd">

<context:annotation-config />
<context:component-scan base-package="com.spring.demo" />


<bean id="dataSource"
class="org.springframework.jdbc.datasource.DriverManagerDataSource">
   <property name="driverClassName" value="com.mysql.jdbc.Driver" />
   <property name="url" value="jdbc:mysql://localhost:3306/testing" />
   <property name="userName" value="vaibhav" />
   <property name="password" value="bhopal@123" />
</bean>

</beans>

您声明了mvc和jdbc名称空间，但没有将它们与各自的xsd文档一起引用以进行验证。如果上面的代码不起作用，请告诉我！

Answer 2

将 util 命名空间添加到声明中：

xmlns:util="http://www.springframework.org/schema/util"

对于schemaLocation：

 http://www.springframework.org/schema/util
 http://www.springframework.org/schema/util/spring-util-2.5.xsd

Answer 3

在spring.xml文件

中的 xsi：schemaLocation 上添加这两行

http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-3.0.xsd

And I notice <beans:beans .....> so also change <bean id="..."> to <beans:bean id="..."> 

And also access property like this:
<beans:property>

Spring sql数据库连接异常

3 个答案: