stm

有时在多次修改程序后编译时出现报警，前面是某个C程序比如main.c:，后面跟着：Warning: C3008W splitting LDM/STM has no benefit 解决办法：若是CM内核的，则在魔术棒Option for Target中C/C++选项卡下的Split Load and Store Multiple选项，去掉打勾不要选，重新编译就好了。 百度有人说CM3中r1pn的Bug报错不是这么回事，我没遇到过； 并且指明：Cortex M系列由于能保存STM/LDM的REG读写状态，所以不需要加Split LDM/STM的编译选项了。 来源： CSDN 作者： kaoyanshiyong 链接： https://blog.csdn.net/kaoyanshiyong/article/details/103933275

1. 2.代码 Bean.java package com.bean; public class Bean { private String name; private String sex; private String nation;//民族 private String time; private int age; private String kind;//政治面貌 private String serve;//服务类别 public Bean() {} public Bean(String name, String sex, String nation, String time, int age, String kind, String serve) { super(); this.name = name; this.sex = sex; this.nation = nation; this.time = time; this.age = age; this.kind = kind; this.serve = serve; } public String getName() { return name; } public void setName(String name) { this.name = name; } public String getSex() {

1. 2.代码 Bean.java package com.bean; public class Bean { private String name; private String sex; private String nation;//民族 private String time; private int age; private String kind;//政治面貌 private String serve;//服务类别 public Bean() {} public Bean(String name, String sex, String nation, String time, int age, String kind, String serve) { super(); this.name = name; this.sex = sex; this.nation = nation; this.time = time; this.age = age; this.kind = kind; this.serve = serve; } public String getName() { return name; } public void setName(String name) { this.name = name; } public String getSex() {

　　在学习制作jsp网站时，学习写了一份SQLHelper文档(静态调用)，内容及其精简，考虑不周之处甚多，不过新手学习还是勉强可以用的。😂 JDBC参考和学习： https://www.yiibai.com/jdbc/ 易百教程 首先，看一下正常JDBC的使用过程. //导入包 import java.sql.*; //几个需要用到的字符串 static final String driver = "com.mysql.jdbc.Driver"; //第一项固定，第二项是地址和端口，第三项是数据库名 static final String url = "jdbc:mysql://localhost:3306/test"; //数据库名和密码 static final String user = "username"; static final String password = "password"; //第一步：打开驱动 Class.forName(driver); //第二步：打开连接 Connection conn = DriverManager.getConnection(url,user,password); //第三步：创建SQL语句和执行SQL语句 Statement stmt = conn.createStatement(); String sql=