How to add jar files and compile using command prompt? (Error: A JNI error has occured,Please Check your Installation)

Question

我从 github 分叉了一个项目，当我想运行时它给出了错误。我将 org.json jar 文件添加到 jdk\lib 并为其设置了 Path 变量。我编译了代码，但它没有错误，但是当我运行它时，我得到如下异常：（我正在运行使用命令提示符）

Error: A JNI error has occurred, please check your installation and
try again Exception in thread "main" java.lang.NoClassDefFoundError:
org/json/JSONExceptio n
        at java.lang.Class.getDeclaredMethods0(Native Method)
        at java.lang.Class.privateGetDeclaredMethods(Unknown Source)
        at java.lang.Class.privateGetMethodRecursive(Unknown Source)
        at java.lang.Class.getMethod0(Unknown Source)
        at java.lang.Class.getMethod(Unknown Source)
        at sun.launcher.LauncherHelper.validateMainClass(Unknown Source)
        at sun.launcher.LauncherHelper.checkAndLoadMain(Unknown Source) Caused by: java.lang.ClassNotFoundException:
org.json.JSONException
        at java.net.URLClassLoader.findClass(Unknown Source)
        at java.lang.ClassLoader.loadClass(Unknown Source)
        at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
        at java.lang.ClassLoader.loadClass(Unknown Source)

... 7 more

Answer 1

像这样将所需的 jar 添加到类路径中：

对于 *nix 类系统：

export CLASSPATH=<path-to-app>/myapp.jar:<path-to-app>/lib/json.jar:.
java MyApp

对于Windows:

set CLASSPATH=<path-to-app>/myapp.jar;<path-to-app>/lib/json.jar;.
java MyApp

...或通过清单：

Manifest-Version: 1.0
Main-Class: MyApp
Class-Path: /lib/json.jar

How to add jar files and compile using command prompt? (Error: A JNI error has occured,Please Check your Installation)

How to add jar files and compile using command prompt? (Error: A JNI error has occured,Please Check your Installation)

java

exception

noclassdeffounderror

jsonexception