spring2.5.6的‘annotation-config’ and its parser class are only available on JDK 1.5 and higher錯誤解決
最近在學習馬士兵的spring教程,視訊教程中的專案中用的是spring低版本(2.5.6),今天用jre 8測試了一下,發現錯誤:
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
看原始碼是org.springframework.context.annotation.AnnotationConfigBeanDefinitionParser自動檢測,jdk版本檢測時需要jre1.5以上版本,但是JdkVersion只檢查到了1.7,jre1.8 時不匹配任何jdk,按如下方法處理,可以解決問題。
1、在專案中建立一個package為org.springframework.core
2、在該package下面新建JdkVersion.java,內容如下:
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 1.8 public 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 1.8 if (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; } } }
3、到專案的WEB-INF/classes 下面找到對應的package中的JdkVersion.class檔案
4、將專案中的spring-core-2.5.6.jar拷貝出來開啟,然後將JdkVersion.class替換jar包中的該檔案。(可以使用win rar開啟jar包)
5、將修改後的spring-core-2.5.6.jar再覆蓋到專案中。
這樣,再啟動專案就不會出現錯誤了。
希望大家都能好好學習java,大家互幫互助,爭取少犯錯誤!