update數據庫更新語句的時候，把表裏所有的數據都更新了

經過來回的檢查，發現是SQL語句沒有加條件語句

修改前

	<update id="update">
			UPDATE smbms_user SET userCode=#{userCode},userName=#{userName},userPassword=#{userPassword},gender=#{gender},birthday=#{birthday},phone=#{phone},address=#{address},userRole=#{userRole},createdBy=#{createdBy},creationDate=#{creationDate},idPicPath=#{idPicPath}
		</update>

修改後

	<update id="update">
			UPDATE smbms_user SET userCode=#{userCode},userName=#{userName},userPassword=#{userPassword},gender=#{gender},birthday=#{birthday},phone=#{phone},address=#{address},userRole=#{userRole},createdBy=#{createdBy},creationDate=#{creationDate},idPicPath=#{idPicPath}
			WHERE id=#{id}
		</update>

測試類

		//更新
		User user=new User();
		user.setId(21);
		user.setUserCode("21");
		user.setUserName("lalaalall");
		int count=session.getMapper(userDao.class).update(user);

重點在於WHERE id=#{id}
沒有加，那麼表中的數據，都會變成你想加的那一條

但是這個更新，會把沒有其餘沒有更新的其他值變爲空

可修改SQL語句

		<update id="update">
		UPDATE smbms_user 
		<set>
			<if test="userCode!=null and userCode!=''">userCode=#{userCode},</if>
			<if test="userName!=null and userName!=''">userName=#{userName},</if>
			<if test="userPassword!=null and userPassword!=''">userPassword=#{userPassword},</if>
			<if test="gender!=null">gender=#{gender},</if>
			<if test="birthday!=null">birthday=#{birthday},</if>
			<if test="phone!=null and phone!=''">phone=#{phone},</if>
			<if test="address!=null and address!=''">address=#{address},</if>
			<if test="userRole!=null">userRole=#{userRole},</if>
			<if test="modifyBy!=null">modifyBy=#{modifyBy},</if>
			<if test="true">modifyDate=NOW(),</if>
			<if test="idPicPath!=null and idPicPath!=''">idPicPath=#{idPicPath},</if>
		</set>
		WHERE id=#{id}
		</update>

	User user = new User();
		user.setUserName("小楊過");
		user.setId(14);
		int count = session.getMapper(UserDao.class).update(user);