老是记不住，干脆把它们抄到博客中来
1. DEFAULT_STYLE
Person@182f0db[name=John Doe,age=33,smoker=false]
2. MULTI_LINE_STYLE
Person@182f0db[
name=John Doe
age=33
smoker=false
]
3. NO_FIELD_NAMES_STYLE
Person@182f0db[John Doe,33,false]
4. SHORT_PREFIX_STYLE
Person[name=John Doe,age=33,smoker=false]
5. SIMPLE_STYLE
John Doe,33,false