1. <insert id="insert" parameterType="com.tortuousroad.groupon.cart.entity.Cart">
2. insert into cart
3. <trim prefix="(" suffix=")" suffixOverrides=",">
4. <if test="id != null">
5. id,
6. </if>
7. <if test="userId != null">
8. user_id,
9. </if>
10. <if test="dealId != null">
11. deal_id,
12. </if>
13. <if test="dealSkuId != null">
14. deal_sku_id,
15. </if>
16. <if test="count != null">
17. count,
18. </if>
19. <if test="createTime != null">
20. create_time,
21. </if>
22. <if test="updateTime != null">
23. update_time,
24. </if>
25. </trim>
26. <trim prefix="values (" suffix=")" suffixOverrides=",">
27. <if test="id != null">
28. #{id,jdbcType=BIGINT},
29. </if>
30. <if test="userId != null">
31. #{userId,jdbcType=BIGINT},
32. </if>
33. <if test="dealId != null">
34. #{dealId,jdbcType=BIGINT},
35. </if>
36. <if test="dealSkuId != null">
37. #{dealSkuId,jdbcType=BIGINT},
38. </if>
39. <if test="count != null">
40. #{count,jdbcType=INTEGER},
41. </if>
42. <if test="createTime != null">
43. #{createTime,jdbcType=TIMESTAMP},
44. </if>
45. <if test="updateTime != null">
46. #{updateTime,jdbcType=TIMESTAMP},
47. </if>
48. </trim>
49. </insert>

suffixOverrides=","

执行的sql语句也许是这样的：insert into cart (id,user_id,deal_id,) values(1,2,1,);显然是错误的