HTML中的特殊符号所对应代码，收藏使用
| 符号 | HTML | 符号 | HTML |
| | & | & | |
| < | < | > | > |
| ⁄ | ⁄ | " | " |
| ¸ | ¸ | ° | ° |
| ½ | ½ | ¼ | ¼ |
| ¾ | ¾ | « | « |
| » | » | ¯ | ¯ |
| ‰ | ‰ | • | • |
| … | … | ″ | ″ |
| ′ | ′ | ‾ | ‾ |
| ← | ← | → | → |
| ↑ | ↑ | ↔ | ↔ |
| ↓ | ↓ | ⇑ | ⇑ |
| ⇓ | ⇓ | ⇔ | ⇔ |
| − | − | ∗ | ∗ |
| ÷ | ÷ | ˆ | ˆ |
| ¦ | ¦ | √ | √ |
| ∞ | ∞ | ∠ | ∠ |
| ∧ | ∧ | ∨ | ∨ |
| ∩ | ∩ | ∪ | ∪ |
| ≠ | ≠ | ≡ | ≡ |
| ≤ | ≤ | ≥ | ≥ |
| ⊂ | ⊂ | ⊃ | ⊃ |
| ⊄ | ⊄ | ⊆ | ⊆ |
| ⊇ | ⊇ | α | α |
| β | β | γ | γ |
| π | π | θ | θ |
| ƒ | ƒ | Δ | Δ |
| ∇ | ∇ | Θ | Θ |
| ∴ | ∴ | © | © |
| ¤ | ¤ | ⊕ | ⊕ |
| ⊗ | ⊗ |
原文：http://www.cnblogs.com/kandyvip/p/4235294.html