FastJson 支持配置的PropertyNamingStrategy四种策略

CamelCase：驼峰式or首字母小写 PascalCase：首字母大写 SnakeCase：蛇形or下划线分割 KebabCase：烤肉串式：中划线分割 NoChange：不改变

贴上源码：

package com.alibaba.fastjson;

/**
 * @since 1.2.15
 */
public enum PropertyNamingStrategy {
          
   
                                    CamelCase, //
                                    PascalCase, //
                                    SnakeCase, //
                                    KebabCase, //
                                    NoChange;

    public String translate(String propertyName) {
          
   
        switch (this) {
          
   
            case SnakeCase: {
          
   
                StringBuilder buf = new StringBuilder();
                for (int i = 0; i < propertyName.length(); ++i) {
          
   
                    char ch = propertyName.charAt(i);
                    if (ch >= A && ch <= Z) {
          
   
                        char ch_ucase = (char) (ch + 32);
                        if (i > 0) {
          
   
                            buf.append(_);
                        }
                        buf.append(ch_ucase);
                    } else {
          
   
                        buf.append(ch);
                    }
                }
                return buf.toString();
            }
            case KebabCase: {
          
   
                StringBuilder buf = new StringBuilder();
                for (int i = 0; i < propertyName.length(); ++i) {
          
   
                    char ch = propertyName.charAt(i);
                    if (ch >= A && ch <= Z) {
          
   
                        char ch_ucase = (char) (ch + 32);
                        if (i > 0) {
          
   
                            buf.append(-);
                        }
                        buf.append(ch_ucase);
                    } else {
          
   
                        buf.append(ch);
                    }
                }
                return buf.toString();
            }
            case PascalCase: {
          
   
                char ch = propertyName.charAt(0);
                if (ch >= a && ch <= z) {
          
   
                    char[] chars = propertyName.toCharArray();
                    chars[0] -= 32;
                    return new String(chars);
                }

                return propertyName;
            }
            case CamelCase: {
          
   
                char ch = propertyName.charAt(0);
                if (ch >= A && ch <= Z) {
          
   
                    char[] chars = propertyName.toCharArray();
                    chars[0] += 32;
                    return new String(chars);
                }

                return propertyName;
            }
            case NoChange:
            default:
                return propertyName;
        }
    }
}

阅读源码，知其所以然。