OracleJdk与openJdk差异引起的NoClassDefFoundError/ClassNotFoundException Java

本地开发好之后，调试运行都没有问题，部署在服务器上运行直接报了以下Error：

Exception in thread "warehouseStart-9001" java.lang.NoClassDefFoundError: javafx/util/Pair at com.kc.evo.wcs.adapter.impl.BasicMapServiceImpl.selectByWarehouse(BasicMapServiceImpl.java:163) at com.kc.evo.wcs.application.init.WarehouseStart.buildMap(WarehouseStart.java:301) at com.kc.evo.wcs.application.init.WarehouseStart.run(WarehouseStart.java:103) Caused by: java.lang.ClassNotFoundException: javafx.util.Pair at java.net.URLClassLoader.findClass(URLClassLoader.java:382) at java.lang.ClassLoader.loadClass(ClassLoader.java:424) at org.springframework.boot.loader.LaunchedURLClassLoader.loadClass(LaunchedURLClassLoader.java:93) at java.lang.ClassLoader.loadClass(ClassLoader.java:357)

一开始还很不可思议，以为服务器没装jdk，java -version后发现也装了jdk1.8。后来在排查过程中发现因为在Windows环境下开发使用的是Oracle官网下载的OracleJdk，而服务器上使用的是OpenJdk。两者还是有一点点差距的，OpenJdk中没有

javafx这个包导致了上面异常的出现。解决方法，在项目中自定义Pair，将项目中使用到javafx.util.Pair的地方改为自定义Pair。

javafx.util.Pair很容易理解，贴一下源码。

public class Pair implements Serializable{/** * Key of this Pair. */ private K key; /** * Gets the key for this pair. * @return key for this pair */ public K getKey() { return key; }/** * Value of this this Pair. */ private V value; /** * Gets the value for this pair. * @return value for this pair */ public V getValue() { return value; }/** * Creates a new pair * @param key The key for this pair * @param value The value to use for this pair */ public Pair(@NamedArg("key") K key, @NamedArg("value") V value) { this.key = key; this.value = https://www.it610.com/article/value; }/** * String representation of this * Pair. * * The default name/value delimiter '=' is always used. * *@return String representation of this Pair */ @Override public String toString() { return key + "=" + value; }/** * Generate a hash code for this Pair. * * The hash code is calculated using both the name and * the value of the Pair. * * @return hash code for this Pair */ @Override public int hashCode() { // name's hashCode is multiplied by an arbitrary prime number (13) // in order to make sure there is a difference in the hashCode between // these two parameters: //name: avalue: aa //name: aa value: a return key.hashCode() * 13 + (value =https://www.it610.com/article/= null ? 0 : value.hashCode()); }/** * 【OracleJdk与openJdk差异引起的NoClassDefFoundError/ClassNotFoundException】Test this Pair for equality with another * Object. * * If the Object to be tested is not a * Pair or is null, then this method * returns false. * * Two Pairs are considered equal if and only if * both the names and values are equal. * * @param o the Object to test for * equality with this Pair * @return true if the given Object is * equal to this Pair else false */ @Override public boolean equals(Object o) { if (this == o) return true; if (o instanceof Pair) { Pair pair = (Pair) o; if (key != null ? !key.equals(pair.key) : pair.key != null) return false; if (value != null ? !value.equals(pair.value) : pair.value != null) return false; return true; } return false; } }