Bean-Query 一个把对象转换为Map的Java工具库

来源：互联网发布：淘宝第一财经联系卖家编辑：程序博客网时间：2024/05/18 18:45

刚开源了一个经过完整测试的Java工具类。
地址如下：
https://github.com/Jimmy-Shi/bean-query
使用说明如下：

Bean-query

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BeanQuery 是一个把对象转换为Map的Java工具库。支持选择Bean中的一些属性，对结果进行排序和按照条件查询。不仅仅可以作用于顶层对象，也可以作用于子对象。

BeanQuery的使用非常简单也很直接，例子代码如下：

/静态导入BeanQueryimport static cn.jimmyshi.beanquery.BeanQuery.*;//使用 select、from、where、orderBy、desc和asc来组装一个Query，然后执行execute方法来获得结果。List<Map<String, Object>> result = select("price,name,mainAuthor.name as mainAuthorName")    .from(bookCollection)    .where(        //for books name is Book2 or starts with Book1        anyOf(            value("name", startsWith("Book1")),            value("name", is("Book2"))        ),        //for books price between (53,65)        allOf(            value("price", greaterThan(53d)),            value("price",lessThan(65d))        )    )    .orderBy("name").desc()    .execute();

在上面的例子中，bookCollection的内容如下所示(json格式)

[  {    "price":55.55,    "name":"Book1",    "mainAuthor":{      "name":"Book1-MainAuthor",      "address":{        "address":"Shenzhen Guangdong China",        "postCode":"518000"      },      "birthDate":"1982-01-30T14:52:39"    }  },  {    "price":52.55,    "name":"Book12",    "mainAuthor":{      "name":"Book1-MainAuthor",      "address":{        "address":"Shenzhen Guangdong China",        "postCode":"518000"      },      "birthDate":"1982-01-30T14:52:39"    }  },  {    "price":53.55,    "name":"Book13",    "mainAuthor":{      "name":"Book13-MainAuthor",      "address":{        "address":"Shenzhen Guangdong China",        "postCode":"518000"      },      "birthDate":"1982-01-30T14:52:39"    }  },  {    "price":60.0,    "name":"Book14",    "mainAuthor":{      "name":"Book14-MainAuthor",      "address":{        "address":"Shenzhen Guangdong China",        "postCode":"518000"      },      "birthDate":"1982-01-30T14:52:39"    }  },  {    "price":50.55,    "name":"Book15",    "mainAuthor":{      "name":"Book1-MainAuthor",      "address":{        "address":"Shenzhen Guangdong China",        "postCode":"518000"      },      "birthDate":"1982-01-30T14:52:39"    }  },  {    "price":77.77,    "name":"Book3",    "mainAuthor":{      "name":"Book3-MainAuthor",      "address":{        "address":"Shenzhen Guangdong China",        "postCode":"518005"      },      "birthDate":"1982-01-30T14:52:39"    }  }  ,  {    "price":66.66,    "name":"Book2",    "mainAuthor":{      "name":"Book2-MainAuthor",      "address":{        "address":"Shenzhen Guangdong China",        "postCode":"518005"      },      "birthDate":"1982-01-30T14:52:39"    }  }]

执行完之后，则result的内容如下所示(json格式)

[  {    "price":60.0,    "name":"Book14",    "mainAuthorName":"Book14-MainAuthor"  },  {    "price":53.55,    "name":"Book13",    "mainAuthorName":"Book13-MainAuthor"  },  {    "price":55.55,    "name":"Book1",    "mainAuthorName":"Book1-MainAuthor"  }]

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