Lu_NLife的博客

Springboot 整合 log4j 依赖 <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> <exclusions><!-- 去掉springboot默认配置 -->

json数组转对象 //使用alibaba fastjson @Test public void test3(){ String str = "[{'aa':'123','bb':'456'},{'aa':789,'bb':'112'}]"; List<Test1> tests = JSONArray.parseArray(str, Test1.class); for (Test1 test : tests){ System.

Java查看对象占多少内存 1.导入依赖 <dependency> <groupId>org.openjdk.jol</groupId> <artifactId>jol-core</artifactId> <version>0.10</version> </dependency> 2.打印对象 String