Eclipse运行参数Program arguments, VM/系统变量arguments, 环境变量Environment variables区别和使用(Idea同理)

/**
 * 运行参数Program arguments, VM/系统变量arguments, 环境变量Environment variables示例
 */
public class ArgsDemoApp {
	
    public static void main(String[] args) {
    	// 运行参数Program arguments
    	int len = args.length;
    	for (int i=0; i<len; i++) {
	      System.out.println(String.format( "args第%d参数值: %s", i+1, args[i]));
	}
//    	args第1参数值: arg1_val11
//    	args第2参数值: arg2_val22
    	
    	// VM/系统变量VM arguments
    	String vmarg1 = System.getProperty("vmarg1");
    	String vmarg2 = System.getProperty("vmarg2");	
    	System.out.println("vmarg1: "+ vmarg1);	// vmarg1: vmarg_val11
    	System.out.println("vmarg2: "+ vmarg2);	// vmarg2: vmarg_val22
    	
    	// 环境变量Environment variables
    	String env1 = System.getenv("env1");	// env1: val_11
    	String env2 = System.getenv("env2");	// env2: val_22
    	System.out.println("env1: "+ env1);
    	System.out.println("env2: "+ env2);
    	
        SpringApplication.run(ArgsDemoApp.class, args);
    } 
}

Eclipse运行参数Program arguments, VM/系统变量arguments, 环境变量Environment variables区别和使用(Idea同理)

原文：https://www.cnblogs.com/weiyunmis/p/14139052.html