Lombok注解
Lombok的@Accessors(chain = true)注解链式风格构建
实现原理
Lombok的@Builder注解，建造者模式生成构建器
@Builder
public class User {
String username;
String password;
}
// 建造者模式构建对象
User u = User.builder().username("用户名").password("密码").build();
实现原理
public class User {
private String username;
private String password;
public User(String username, String password) {
this.username = username;
this.password = password;
}
public static User.UserBuilder builder(){
return new User.UserBuilder();
}
public static class UserBuilder {
private String username;
private String password;
public User.UserBuilder username(String username){
this.username = username;
return this;
}
public User.UserBuilder password(String password){
this.password = password;
return this;
}
public User build(){
return new User(this.username, this.password);
}
}
}
Maven 冲突
使用IDEA插件Maven Helper，查看pom.xml文件，选择Dependency Analyzer，选择Conflicts即可查看冲突的依赖，直接右键选择Exclude即可排除掉冲突或重复的依赖，再点击Refresh-UI刷新检测
精度丢失
前端Long类型精度丢失
例如：201911200001725439这样一个Long类型数，传给前端后会变成201911200001725440
字段上使用注解：@JSONField(serializeUsing= ToStringSerializer.class)
前后分离项目的时间字段尽量不要使用时间戳存储
@JsonFormat(timezone = "GMT+8", pattern = "yyyy-MM-dd HH:mm:ss")
@DateTimeFormat(pattern = "yyyy-MM-dd HH:mm:ss")
private Date createTime;
前后端时间格式保持一致。
MySQL数据库远程连接慢
推荐开启skip_name_resolve
