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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,30 +1,72 @@ | ||
| package com.geekq.miaosha; | ||
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|
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| import com.geekq.miaosha.domain.MiaoshaUser; | ||
| import org.apache.ibatis.io.Resources; | ||
| import org.apache.ibatis.session.SqlSession; | ||
| import org.apache.ibatis.session.SqlSessionFactory; | ||
| import org.apache.ibatis.session.SqlSessionFactoryBuilder; | ||
|
|
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| import java.io.IOException; | ||
| import java.io.Reader; | ||
| import java.util.ArrayList; | ||
| import java.util.List; | ||
|
|
||
| /** | ||
| * mybatis xml 写法的配置测试类 | ||
| */ | ||
| public class Test { | ||
| public static void main(String[] args) throws IOException { | ||
| public static List<Double> list = new ArrayList<Double>(); | ||
|
|
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| //读取配置文件 | ||
| Reader reader = Resources.getResourceAsReader("config.xml"); | ||
| SqlSessionFactory sessionFactory = new SqlSessionFactoryBuilder().build(reader); | ||
| public static void main(String[] args) { | ||
| double[] keys = {1, 2,3}; | ||
| System.err.println(getNum(keys, 5)); | ||
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|
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| SqlSession session = sessionFactory.openSession(); | ||
| // 举例：3 个元素：a, b, c。所以有2 ^ 3 = 8 个组合结果：所以i = 0, 1, 2,....7.对应应输出 a, b, ab, c...abc(注意a表示001，不是100.) | ||
| // | ||
| // 将i变成2进制： | ||
| // i = 1 = 001 | ||
| // i = 2 = 010 | ||
| // i = 3 = 011 | ||
| // | ||
| // (1) j = 0 (1) j = 0 (1) j = 0 | ||
| // 移1位：1 << j == 001 1 << j == 001 1 << j == 001 | ||
| // 和i = 001 相与，两个位都为1，返回1 与i无相同位 和i = 001 相与，两个位都为1，返回1 | ||
| // 输出：a 输出a | ||
| // | ||
| // (2) j = 1 (2) j = 1 (2) j = 1 | ||
| // 再移一位：1 << j == 010 1 << j == 010 1 << j == 010 | ||
| // 与i = 001 相与。无相同1 和i相与，两个位都为1，返回1 和i相与，两个位都为1，返回1 | ||
| // 输出b 输出b | ||
| // | ||
| // (3) j = 2 3)j = 2 (3) j = 2 | ||
| // 移一位 1 << j == 100 1 << j == 100 | ||
| // 与i无相同位 与i无相同位 与i无相同位 | ||
| // | ||
| // 所以i = 001, 只输出a.所以i = 010, 只输出b.所以011，输出ab | ||
| // | ||
| // ************************************* | ||
| // *可见上面每一个数字i, 只会判断判断3次，因为只需要移三次位，二进制就遍历完了 | ||
|
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| String statement = "com.geekq.miaosha.dao.UserMapper.getMiaoShaUserById" ; | ||
| MiaoshaUser user = session.selectOne(statement,"18612766134"); | ||
| } | ||
|
|
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| System.out.println(user.toString()); | ||
| static List<Double> getNum(double[] keys, double kill) { | ||
| int n = keys.length;//数字长度 | ||
| System.out.println(n); | ||
| int nbit = 1 << n; // 8 | ||
| System.out.println(nbit); | ||
| double in; | ||
| List<Double> list = new ArrayList<Double>(); | ||
| for (int i = 0; i < nbit; i++) { | ||
| System.out.println("nbit======="+i); | ||
| in = 0; | ||
| list.clear(); | ||
| for (int j = 0; j < n; j++) { | ||
| System.out.println("j======"+j); | ||
| int tmp = 1 << j; // 由0到n右移位 | ||
| System.out.println("tmp===="+tmp); | ||
| if ((tmp & i) != 0) { // 与运算，同为1时才会是1 | ||
| System.out.println("keys[j]=========="+keys[j]); | ||
| in += keys[j]; | ||
| list.add(keys[j]); | ||
| } | ||
| } | ||
| if (in == kill){ | ||
| return list; | ||
| } | ||
| } | ||
| return list; | ||
| } | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,41 +1,20 @@ | ||
| package com.geekq.miaosha.domain; | ||
|
|
||
| import lombok.AllArgsConstructor; | ||
| import lombok.Getter; | ||
| import lombok.NoArgsConstructor; | ||
| import lombok.Setter; | ||
|
|
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| import java.util.Date; | ||
|
|
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| @Setter | ||
| @Getter | ||
| @AllArgsConstructor | ||
| @NoArgsConstructor | ||
| public class MiaoshaGoods { | ||
| private Long id; | ||
| private Long goodsId; | ||
| private Integer stockCount; | ||
| private Date startDate; | ||
| private Date endDate; | ||
| public Long getId() { | ||
| return id; | ||
| } | ||
| public void setId(Long id) { | ||
| this.id = id; | ||
| } | ||
| public Long getGoodsId() { | ||
| return goodsId; | ||
| } | ||
| public void setGoodsId(Long goodsId) { | ||
| this.goodsId = goodsId; | ||
| } | ||
| public Integer getStockCount() { | ||
| return stockCount; | ||
| } | ||
| public void setStockCount(Integer stockCount) { | ||
| this.stockCount = stockCount; | ||
| } | ||
| public Date getStartDate() { | ||
| return startDate; | ||
| } | ||
| public void setStartDate(Date startDate) { | ||
| this.startDate = startDate; | ||
| } | ||
| public Date getEndDate() { | ||
| return endDate; | ||
| } | ||
| public void setEndDate(Date endDate) { | ||
| this.endDate = endDate; | ||
| } | ||
| } |
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