spring 配置注解

报错内容： Context namespace element 'annotation-config' and its parser class [org.springframework.context.annotation.AnnotationConfigBeanDefinitionParser] are only available on JDK 1.5 and higher

原因：使用的是jdk1.8，spring会检测jdk版本，在org.springframework.core.JdkVersion.class这个类中定义了支持的jdk版本，支持jdk1.5以上版本，

但是最多定义到了jdk1.7.

解决办法：

1.更换jdk版本。1.5-1.7版本

2.修改JdkVersion.class这个类，再将这个类编译替换到原来的jar包中。

修改后的文件为：

   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 Java 8
* *
*/
public static final int JAVA_18 = 5;
private static final String javaVersion;


private static final int majorJavaVersion;


static {
javaVersion = System.getProperty("java.version");
// for Java8
   if (javaVersion.indexOf("1.8.") != -1) {
majorJavaVersion = JAVA_18;
}
else if (javaVersion.indexOf("1.7.") != -1) {
majorJavaVersion = JAVA_17;
}
else if (javaVersion.indexOf("1.6.") != -1) {
majorJavaVersion = JAVA_16;
}
else if (javaVersion.indexOf("1.5.") != -1) {
majorJavaVersion = JAVA_15;
}
else {
// else leave 1.4 as default (it's either 1.4 or unknown)
majorJavaVersion = JAVA_14;
}
}
public static String getJavaVersion() {
return javaVersion;
}
public static int getMajorJavaVersion() {
return majorJavaVersion;
}
public static boolean isAtLeastJava14() {
return true;
}
public static boolean isAtLeastJava15() {
return getMajorJavaVersion() >= JAVA_15;
}
public static boolean isAtLeastJava16() {
return getMajorJavaVersion() >= JAVA_16;
}


}