出处:https://gitee.com/pengzhile/ide-eval-resetter

下载后直接拖zip进IDE窗口，可走插件更新机制保持最新。
这个插件会一同清理市场收费插件的试用时间，比如iedis2 / minbatis 之类的都可以。
可勾选选项达到重启自动重置，静默无感知。

Reset Your IDE Eval Information

1. Download and install plugin from Download Link.
   • Alternative installation method:
     • Add “Custom Plugin Repository”: https://plugins.zhile.io manually (Settings/Preferences -> Plugins)
     • Search and install plugin: IDE Eval Reset
2. Click Help or Get Help -> Eval Reset menu.
3. Click Reset -> Yes button.
4. Restart your IDE.
5. Now you have another 30 days eval time 🙂

1,在项目上鼠标右键 –> Open Module Settings

2, Artifacts –> + –> JAR –> From modules with dependencies…

3, Main Class是你这个项目(脚本)的主方法,就是要运行的类,选一个

4,如下图,设置 META-INF/MANIFEST.MF

!!!!!切记,不能用默认的(起码我用默认的是不成功的)!!!!!

6,选中你这个项目的根目录,一定要放在根目录下

7,设置完是这样子的,关于 JAR files from libraries的两个选项:

选中第一个的话,打完包后是一个jar包

选中第二个的话,打完包后是一个jar包,外带你项目所用的jar包,个人推荐第二个

8,设置完后就可以点OK了

9,这个页面, Build on make打上勾,其他的不一样也没事

10,最后一步, Build Artifacts… –> XXX.jar –> Build

11,复制这里的路径去找jar包就行: java -jar XXX.jar

准备清单:

1. IDE(IDEA 2018.2)
2. JDK
3. MYSQL
4. TOMCAT
5. mysql-connector-java-5.1.46.JAR

开发过程

1. 1. 1. 新建项目
         
      2. 在工程项目的web目录下的WEB-INF下建立两个文件夹，一个是classes，用于保存程序运行时编译的文件。另一个是lib文件夹，用于存放程序运行时所要存放的外部类。
      3. 配置项目结构以及tomcat。
         
         a.output目录选择刚才新建的classes目录。
         
         b.外部类的引用路径选择刚才建的lib文件夹。（选择完弹出的的选择框选择Jar directory）
      4. 将下载的jdbc驱动包放到刚才建的lib文件夹下。
      5. 在src文件夹下建立DBConfig.properties文件.
      6. 新建类(OpenConnection),获取数据库连接。

         package com.amaker.util;
         
         import java.io.IOException;
         import java.sql.Connection;
         import java.sql.DriverManager;
         import java.sql.SQLException;
         import java.util.Properties;
         
         public class OpenConnection {
             public Connection getConnection(){
         
                 String driver = null;
                 String url = null;
                 String user = null;
                 String psd = null;
                 Connection conn = null;
         
                 Properties pro = new Properties();    //新建一个properties实例，用于从DBConfig中拿到连接参数。
                 try {
                     pro.load(this.getClass().getClassLoader().getResourceAsStream("DBConfig.properties")); //加载DBConfig文件。
                     driver = pro.getProperty("driver");
                     url = pro.getProperty("url");
                     user = pro.getProperty("user");
                     psd = pro.getProperty("psd");
                 } catch (IOException e) {
                     e.printStackTrace();
                 }
         
                 try {
                     Class.forName(driver);   //加载jdbc驱动
                 } catch (ClassNotFoundException e) {
                     e.printStackTrace();
                 }
         
                 try {
                     conn = DriverManager.getConnection(url,user,psd);  //获取数据库连接
                     conn.setAutoCommit(false);
                     return conn;       //返回一个数据库连接。
                 } catch (SQLException e) {
                     e.printStackTrace();
                 }
         
                 return null;
             }
         }
         

eclipse非正常关闭,再启动时闪退.

查看日志发现空指针错误:!MESSAGE 从插件调用代码时出现问题：“org.eclipse.core.resources”。

!ENTRY org.eclipse.core.resources 4 2 2018-07-26 16:29:53.637
!MESSAGE 从插件调用代码时出现问题：“org.eclipse.core.resources”。
!STACK 0
java.lang.NullPointerException
at org.eclipse.ui.activities.WorkbenchActivityHelper.isFiltering(WorkbenchActivityHelper.java:235)
at org.eclipse.ui.internal.ide.IDEWorkbenchActivityHelper$3.resourceChanged(IDEWorkbenchActivityHelper.java:158)
at org.eclipse.core.internal.events.NotificationManager$1.run(NotificationManager.java:291)
at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
at org.eclipse.core.internal.events.NotificationManager.notify(NotificationManager.java:285)
at org.eclipse.core.internal.events.NotificationManager.broadcastChanges(NotificationManager.java:149)
at org.eclipse.core.internal.resources.Workspace.broadcastPostChange(Workspace.java:395)
at org.eclipse.core.internal.resources.Workspace.endOperation(Workspace.java:1530)
at org.eclipse.core.internal.resources.Workspace.run(Workspace.java:2353)
at org.eclipse.debug.core.model.Breakpoint.setAttribute(Breakpoint.java:196)
at org.eclipse.jdt.internal.debug.core.breakpoints.JavaBreakpoint.decrementInstallCount(JavaBreakpoint.java:865)
at org.eclipse.jdt.internal.debug.core.breakpoints.JavaBreakpoint.deregisterRequest(JavaBreakpoint.java:275)
at org.eclipse.jdt.internal.debug.core.breakpoints.JavaBreakpoint.removeRequests(JavaBreakpoint.java:779)
at org.eclipse.jdt.internal.debug.core.breakpoints.JavaBreakpoint.removeFromTarget(JavaBreakpoint.java:716)
at org.eclipse.jdt.internal.debug.core.model.JDIDebugTarget.removeAllBreakpoints(JDIDebugTarget.java:1562)
at org.eclipse.jdt.internal.debug.core.model.JDIDebugTarget.cleanup(JDIDebugTarget.java:1518)
at org.eclipse.jdt.internal.debug.core.model.JDIDebugTarget.shutdown(JDIDebugTarget.java:1654)
at org.eclipse.jdt.internal.debug.core.JDIDebugPlugin.stop(JDIDebugPlugin.java:345)
at org.eclipse.osgi.framework.internal.core.BundleContextImpl$2.run(BundleContextImpl.java:771)
at java.security.AccessController.doPrivileged(Native Method)
at org.eclipse.osgi.framework.internal.core.BundleContextImpl.stop(BundleContextImpl.java:764)
at org.eclipse.osgi.framework.internal.core.BundleHost.stopWorker(BundleHost.java:510)
at org.eclipse.osgi.framework.internal.core.AbstractBundle.suspend(AbstractBundle.java:566)
at org.eclipse.osgi.framework.internal.core.Framework.suspendBundle(Framework.java:1206)
at org.eclipse.osgi.framework.internal.core.StartLevelManager.decFWSL(StartLevelManager.java:592)
at org.eclipse.osgi.framework.internal.core.StartLevelManager.doSetStartLevel(StartLevelManager.java:257)
at org.eclipse.osgi.framework.internal.core.StartLevelManager.shutdown(StartLevelManager.java:215)
at org.eclipse.osgi.framework.internal.core.InternalSystemBundle.suspend(InternalSystemBundle.java:284)
at org.eclipse.osgi.framework.internal.core.Framework.shutdown(Framework.java:692)
at org.eclipse.osgi.framework.internal.core.Framework.close(Framework.java:600)
at org.eclipse.core.runtime.adaptor.EclipseStarter.shutdown(EclipseStarter.java:399)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:199)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:629)
at org.eclipse.equinox.launcher.Main.basicRun(Main.java:584)
at org.eclipse.equinox.launcher.Main.run(Main.java:1438)

解决方案:删除以下文件夹org.eclipse.e4.workbench

\workspace\.metadata\.plugins\org.eclipse.e4.workbench