java.lang.IllegalStateException: Context namespace element ‘annotation-config’ and its parser class

项目中用的是spring低版本（2.5.6），今天用jre 8测试了一下，发现错误：
Unexpected exception parsing XML document from class path resource [applicationContext-dao.xml]; nested exception is java.lang.IllegalStateException: Context namespace element ‘annotation-config’ and its parser class [org.springframework.context.annotation.AnnotationConfigBeanDefinitionParser] are only available on JDK 1.5 and higher

看源码是org.springframework.context.annotation.AnnotationConfigBeanDefinitionParser自动检测，jdk版本检测时需要jre1.5以上版本，但是JdkVersion只检查到了1.7，jre1.8 时不匹配任何jdk，按如下方法处理，可以解决问题。

1、在项目中创建一个package为org.springframework.core
2、在该package下面新建JdkVersion.java，内容如下：

package org.springframework.core;public abstract class JdkVersion {public static final int JAVA_13 = 0;public static final int JAVA_14 = 1;public static final int JAVA_15 = 2;public static final int JAVA_16 = 3;public static final int JAVA_17 = 4;//for jre 1.8public static final int JAVA_18 = 5;private static final String javaVersion = System.getProperty("java.version");private static final int majorJavaVersion;public static String getJavaVersion() {return javaVersion;}public static int getMajorJavaVersion() {return majorJavaVersion;}public static boolean isAtLeastJava14() {return true;}public static boolean isAtLeastJava15() {return getMajorJavaVersion() >= 2;}public static boolean isAtLeastJava16() {return getMajorJavaVersion() >= 3;}static {//for jre 1.8if (javaVersion.indexOf("1.8.") != -1) {majorJavaVersion = 5;}else if (javaVersion.indexOf("1.7.") != -1) {majorJavaVersion = 4;} else if (javaVersion.indexOf("1.6.") != -1) {majorJavaVersion = 3;} else if (javaVersion.indexOf("1.5.") != -1) {majorJavaVersion = 2;} else {majorJavaVersion = 1;}}
}

我这里只是添加了这个文件，并没有替换之前的spring.jar下的文件，很神奇竟然也可以了。

因为我做的项目是比较早的，所以直接用的别人的jar包。有些版本不匹配。所以报的错。我用的JDK的版本是1.8.应该换成1.7就OK了。

这个方式比较直接，比较好。

这些问题都可以百度得到。

3、到项目的WEB-INF/classes 下面找到对应的package中的JdkVersion.class文件
4、将项目中的spring-core-2.5.6.jar拷贝出来打开，然后将JdkVersion.class替换jar包中的该文件。
5、将修改后的spring-core-2.5.6.jar再覆盖到项目中。

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