java开发_mysql中获取数据库表描述_源码下载

功能描述：

在mysql数据库中，有两张表：

data_element_config , test_table

我们需要获取表：test_table表的描述信息，然后把描述信息插入到表：data_element_config中记录结果

项目结构：

运行效果：

控制台输出效果：

数据库表：data_element_config情况

================================================

代码部分：

================================================

data_element_config表情况：

 CREATE TABLE `data_element_config` (
   `de_name` varchar(75) NOT NULL,
   `de_group` varchar(15) NOT NULL,
   `memo` varchar(300) NOT NULL,
   `data_type` int(11) NOT NULL,
   `value_check` varchar(10) NOT NULL,
   `yx_bj` char(1) NOT NULL,
   PRIMARY KEY (`de_name`)
 ) ENGINE=InnoDB DEFAULT CHARSET=utf8;

test_table表情况：

CREATE TABLE `test_table` (
  `Test_ID` int(11) NOT NULL AUTO_INCREMENT COMMENT '主键(自增长)',
  `Test_Key` varchar(10) COLLATE utf8_bin NOT NULL COMMENT '种类',
  `Test_Value` varchar(20) COLLATE utf8_bin NOT NULL COMMENT '数值',
  `Test_Type` int(11) NOT NULL COMMENT '内部类型',
  `Test_BelongTo` int(11) DEFAULT NULL COMMENT '从属关系',
  `Test_Grade` int(11) DEFAULT '' COMMENT '等级',
  `Test_Remark` varchar(50) COLLATE utf8_bin DEFAULT NULL COMMENT '备注',
  `Test_Visible` bit(1) DEFAULT b'' COMMENT '是否可见',
  PRIMARY KEY (`Test_ID`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8 COLLATE=utf8_bin COMMENT='测试表';

/DataElementConfigTool/src/com/b510/data/element/config/tool/DataBaseBO.java

 package com.b510.data.element.config.tool;

 import java.io.Serializable;
 import java.util.List;

 /**
  * 数据库配置信息
  *
  * @author Hongten
  * @mail hongtenzone@foxmail.com
  * @create 2013-8-3
  */
 public class DataBaseBO implements Serializable {
     private static final long serialVersionUID = 171777003280248377L;
     private final String SELECT_SQL_FIELD = " column_name as field,";
     private final String SELECT_SQL_TYPE = " data_type as type,";
     private final String SELECT_SQL_MEMO = " column_comment as memo,";
     private final String SELECT_SQL_MUNERIC_LENGTH = " numeric_precision as munericLength,";
     private final String SELECT_SQL_NUMERIC_SCALE = " numeric_scale as numericScale, ";
     private final String SELECT_SQL_ISNULLABLE = " is_nullable as isNullable,";
     private final String SELECT_SQL_EXTRA = " CASE WHEN extra = 'auto_increment' THEN 1 ELSE 0 END as extra,";
     private final String SELECT_SQL_ISDEFAULT = " column_default as isDefault,";
     private final String SELECT_SQL_CHARACTER_LENGTH = " character_maximum_length  AS characterLength ";
     /**
      * 查询表结构sql
      */
     private String selectSQL = "SELECT " + SELECT_SQL_FIELD + SELECT_SQL_TYPE + SELECT_SQL_MEMO + SELECT_SQL_MUNERIC_LENGTH + SELECT_SQL_NUMERIC_SCALE + SELECT_SQL_ISNULLABLE + SELECT_SQL_EXTRA + SELECT_SQL_ISDEFAULT + SELECT_SQL_CHARACTER_LENGTH + " FROM Information_schema.columns WHERE  table_Name = ";
     /**
      * 驱动名称
      */
     private String driver;
     /**
      * 数据库名称
      */
     private String dbName;
     /**
      * 数据库密码
      */
     private String passwrod;
     /**
      * 数据库用户名
      */
     private String userName;
     /**
      * 访问数据库的url
      */
     private String url;
     /**
      * 端口号
      */
     private String port;
     /**
      * ip地址
      */
     private String ip;
     /**
      * 数据类型：mysql， oracle等等
      */
     private String dbType;

     /**
      * 根据sql:show tables;查询出的数据库表名称
      */
     private List<String> tables;
     /**
      * 数据库表名称
      */
     private String tableName;
     /**
      * sql语句
      */
     private String sql;

     public String getDriver() {
         return driver;
     }

     public void setDriver(String driver) {
         this.driver = driver;
     }

     public String getDbName() {
         return dbName;
     }

     public void setDbName(String dbName) {
         this.dbName = dbName;
     }

     public String getPasswrod() {
         return passwrod;
     }

     public void setPasswrod(String passwrod) {
         this.passwrod = passwrod;
     }

     public String getUserName() {
         return userName;
     }

     public void setUserName(String userName) {
         this.userName = userName;
     }

     public String getUrl() {
         return url;
     }

     public void setUrl(String url) {
         this.url = url;
     }

     public String getSql() {
         return sql;
     }

     public void setSql(String sql) {
         this.sql = sql;
     }

     public String getPort() {
         return port;
     }

     public void setPort(String port) {
         this.port = port;
     }

     public String getIp() {
         return ip;
     }

     public void setIp(String ip) {
         this.ip = ip;
     }

     public String getDbType() {
         return dbType;
     }

     public void setDbType(String dbType) {
         this.dbType = dbType;
     }

     public static long getSerialversionuid() {
         return serialVersionUID;
     }

     public List<String> getTables() {
         return tables;
     }

     public void setTables(List<String> tables) {
         this.tables = tables;
     }

     public String getTableName() {
         return tableName;
     }

     public void setTableName(String tableName) {
         this.tableName = tableName;
     }

     public String getSelectSQL() {
         return selectSQL;
     }

     public void setSelectSQL(String selectSQL) {
         this.selectSQL = selectSQL;
     }

 }

/DataElementConfigTool/src/com/b510/data/element/config/tool/DataElementConfigBO.java

 /**
  *
  */
 package com.b510.data.element.config.tool;

 import java.io.Serializable;

 /**
  * data_element_config这张表的BO类
  *
  * @author Hongten
  * @mail hongtenzone@foxmail.com
  * @create 2013-8-3
  */
 public class DataElementConfigBO implements Serializable {
     private static final long serialVersionUID = -5951470192914621265L;
     /**
      * 数据库表的字段名称：TableDescBO - field
      */
     private String deName;
     /**
      * 数据库表的分组，这里主要是在却别不同的字段名称<br>
      * 如：有同一个字段名为<code>name</code>,那么在生成DE的过程中系统不知道<br>
      * 是哪一个组或者哪一个用例的<code>name</code>字段，，如果一个字段是<code>TEST</code><br>
      * 一个字段是<code>DEMO</code>的，那么在生成DE的时候，就很容易区分了<br>
      * 则分别生成的DE是：<code>DE_TEST_NAME</code>和<code>DE_DEMO_NAME</code><br>
      */
     private String deGroup;
     /**
      * 数据库表字段的描述
      */
     private String memo;
     /**
      * 数据库表字段对应的数据类型
      */
     private int dataType;
     /**
      * 该属性默认为：<code>true</code>,不用去修改
      */
     private String valueCheck;
     /**
      * 有效标记，这里统一设置为:<code>1</code>,表示有效的<br>
      * 如果设置为：<code>0</code>,则在生成DE的时候，该类会被标记为：<code>@Deprecated</code>
      */
     private String yxBj;
     /**
      * 插入数据库表：<code>data_element_config</code>的sql语句
      */
     private String insertIntoSQL = "INSERT INTO DATA_ELEMENT_CONFIG(DE_NAME,DE_GROUP,MEMO,DATA_TYPE,VALUE_CHECK,YX_BJ) VALUES (";

     public String getDeName() {
         return deName;
     }

     public void setDeName(String deName) {
         this.deName = deName;
     }

     public String getDeGroup() {
         return deGroup;
     }

     public void setDeGroup(String deGroup) {
         this.deGroup = deGroup;
     }

     public String getMemo() {
         return memo;
     }

     public void setMemo(String memo) {
         this.memo = memo;
     }

     public int getDataType() {
         return dataType;
     }

     public void setDataType(int dataType) {
         this.dataType = dataType;
     }

     public String getValueCheck() {
         return valueCheck;
     }

     public void setValueCheck(String valueCheck) {
         this.valueCheck = valueCheck;
     }

     public String getYxBj() {
         return yxBj;
     }

     public void setYxBj(String yxBj) {
         this.yxBj = yxBj;
     }

     public String getInsertIntoSQL() {
         return insertIntoSQL;
     }

     public void setInsertIntoSQL(String insertIntoSQL) {
         this.insertIntoSQL = insertIntoSQL;
     }

 }

/DataElementConfigTool/src/com/b510/data/element/config/tool/DataElementConfigTool.java

 package com.b510.data.element.config.tool;

 import java.sql.Connection;
 import java.sql.DriverManager;
 import java.sql.PreparedStatement;
 import java.sql.ResultSet;
 import java.sql.SQLException;
 import java.util.ArrayList;
 import java.util.List;

 /**
  * DE数据插入工具
  *
  * @author Hongten
  * @mail hongtenzone@foxmail.com
  * @create 2013-8-3
  */
 public class DataElementConfigTool {

     public static void main(String[] args) {
         // 设置数据库链接信息
         DataBaseBO dataBaseBO = new DataBaseBO();
         dataBaseBO.setDbName("sworddemo");
         dataBaseBO.setDriver("com.mysql.jdbc.Driver");
         dataBaseBO.setUserName("root");
         dataBaseBO.setPasswrod("gzcss");
         dataBaseBO.setTableName("'test_table'");
         dataBaseBO.setSql(dataBaseBO.getSelectSQL() + dataBaseBO.getTableName());
         System.out.println(dataBaseBO.getSql());
         // 初始化数据库链接的相关信息
         DataElementConfigTool tool = new DataElementConfigTool(dataBaseBO);
         // 数据库表结构情况
         List<TableDescBO> list = tool.getTableDescBOList(dataBaseBO);
         System.out.println(" Field     Type     Null     Key     Default     Extra      memo");
         if (list != null) {
             for (TableDescBO bo : list) {
                 System.out.println(bo.toString());
                 // 对数据库表描述进行封装成DataElementConfigBO对象
                 DataElementConfigBO decBo = tool.getDataElementConfigBO(bo, "gnzy");
                 // 向数据库表：data_element_config中插入数据
                 int result = tool.insertIntoDECTable(dataBaseBO, decBo);
                 System.out.println("插入数据：" + (result == 1 ? "成功" : "失败"));
             }
         }
     }

     /**
      * 初始化数据库链接的相关信息
      *
      * @param dataBaseBO
      *            数据库配置信息
      */
     public DataElementConfigTool(DataBaseBO dataBaseBO) {
         super();
         dataBaseBO.setIp(dataBaseBO.getIp() == null ? "localhost" : dataBaseBO.getIp());
         dataBaseBO.setPort(dataBaseBO.getPort() == null ? "3306" : dataBaseBO.getPort());
         dataBaseBO.setUrl("jdbc:mysql://" + dataBaseBO.getIp() + ":" + dataBaseBO.getPort() + "/" + dataBaseBO.getDbName());
     }

     /**
      * 数据库表结构情况
      *
      * @param dataBaseBO
      *            数据库配置信息
      * @return 所需查询的数据表的字段信息
      */
     public List<TableDescBO> getTableDescBOList(DataBaseBO dataBaseBO) {
         List<TableDescBO> list = new ArrayList<TableDescBO>();
         TableDescBO tableDescBO = null;
         try {
             Class.forName(dataBaseBO.getDriver());
             Connection conn = DriverManager.getConnection(dataBaseBO.getUrl(), dataBaseBO.getUserName(), dataBaseBO.getPasswrod());
             PreparedStatement ps = conn.prepareStatement(dataBaseBO.getSql());
             ResultSet rs = ps.executeQuery();
             while (rs.next()) {
                 tableDescBO = new TableDescBO();
                 tableDescBO.setField(rs.getString(1));
                 tableDescBO.setType(rs.getString(2));
                 tableDescBO.setMemo(rs.getString(3));
                 tableDescBO.setMunericLength(rs.getString(4));
                 tableDescBO.setNumericScale(rs.getString(5));
                 tableDescBO.setIsNullable(rs.getString(6));
                 tableDescBO.setExtra(rs.getString(7));
                 tableDescBO.setIsDefault(rs.getString(8));
                 tableDescBO.setCharacterLength(rs.getString(9));
                 list.add(tableDescBO);
             }
             close(rs, ps, conn);
         } catch (Exception e) {
             e.printStackTrace();
         }
         return list;
     }

     /**
      * 执行向数据库表:<code>data_element_config</code>中插入数据
      *
      * @param dataBaseBO
      *            数据库配置信息
      * @param decBo
      *            data_element_config这张表的BO类
      * @return 返回:<code>-1</code>, 表示插入数据失败，否则成功
      */
     public int insertIntoDECTable(DataBaseBO dataBaseBO, DataElementConfigBO decBo) {
         int result = -1;
         if (decBo != null) {
             String sql = decBo.getInsertIntoSQL() + decBo.getDeName() + "," + decBo.getDeGroup() + "," + decBo.getMemo() + "," + decBo.getDataType() + "," + decBo.getValueCheck() + "," + decBo.getYxBj() + ")";
             try {
                 Class.forName(dataBaseBO.getDriver());
                 Connection conn = DriverManager.getConnection(dataBaseBO.getUrl(), dataBaseBO.getUserName(), dataBaseBO.getPasswrod());
                 PreparedStatement ps = conn.prepareStatement(sql);
                 result = ps.executeUpdate();
                 close(null, ps, conn);
             } catch (Exception e) {
                 e.printStackTrace();
             }
         }
         return result;
     }

     /**
      * 去除括号，如："int(11)",去除括号了以后，为："int"
      *
      * @param oldType
      * @return
      */
     public static String getType(String oldType) {
         if (oldType != null && !oldType.equals("")) {
             return oldType.substring(0, oldType.indexOf("("));
         }
         return null;
     }

     /**
      * 对数据库表描述进行封装成DataElementConfigBO对象
      *
      * @param tableDescBO
      *            数据库表的描述
      * @param group
      *            字段的分组名称，在表：<code>data_element_config</code>中对应的
      *            <code>de_group</code>字段
      * @return dataElementConfig对象的一个实例
      */
     public DataElementConfigBO getDataElementConfigBO(TableDescBO tableDescBO, String group) {
         DataElementConfigBO bo = null;
         if (tableDescBO != null) {
             bo = new DataElementConfigBO();
             bo.setDeName("'" + tableDescBO.getField() + "'");
             bo.setDeGroup("'" + group + "'");
             bo.setValueCheck("'true'");
             bo.setYxBj("'1'");
             bo.setMemo("'" + tableDescBO.getMemo() + "'");
             bo.setDataType(1);
         }
         return bo;
     }

     /**
      * 关闭数据库的相关链接
      *
      * @param rs
      *            记录集
      * @param ps
      *            声明
      * @param conn
      *            链接对象
      */
     public void close(ResultSet rs, PreparedStatement ps, Connection conn) {
         // 关闭记录集
         if (rs != null) {
             try {
                 rs.close();
             } catch (SQLException e) {
                 e.printStackTrace();
             }
         }
         // 关闭声明
         if (ps != null) {
             try {
                 ps.close();
             } catch (SQLException e) {
                 e.printStackTrace();
             }
         }
         // 关闭链接对象
         if (conn != null) {
             try {
                 conn.close();
             } catch (SQLException e) {
                 e.printStackTrace();
             }
         }
     }
 }

/DataElementConfigTool/src/com/b510/data/element/config/tool/TableDescBO.java

 /**
  *
  */
 package com.b510.data.element.config.tool;

 import java.io.Serializable;

 /**
  * 数据库表结构情况BO
  *
  * @author Hongten
  * @mail hongtenzone@foxmail.com
  * @create 2013-8-3
  */
 public class TableDescBO implements Serializable {
     private static final long serialVersionUID = 6450523501528806316L;
     /**
      * 数据库表中对应的字段名称
      */
     private String field;
     /**
      * 数据库表中对应字段的类型
      */
     private String type;
     /**
      * 数据库表中字段是否为空：YES/NO
      */
     private String isNullable;
     /**
      * 是否为主键：KEY，不是，则为空，null
      */
     private String key;
     /**
      * 字段的默认值
      */
     private String isDefault;
     /**
      * 额外的属性，如：auto_increment
      */
     private String extra;
     /**
      * 小数位数
      */
     private String numericScale;
     /**
      * 数字长度
      */
     private String munericLength;

     /**
      * 字符长度
      */
     private String characterLength;
     /**
      * 备注
      */
     private String memo;

     /**
      * 重写toStirng方法 主要是为了控制台输出
      */
     public String toString() {
         return " " + field + "   " + type + "    " + isNullable + "        " + key + "        " + isDefault + "      " + extra + "            "+ memo;
     }

     public String getField() {
         return field;
     }

     public void setField(String field) {
         this.field = field;
     }

     public String getType() {
         return type;
     }

     public void setType(String type) {
         this.type = type;
     }

     public String getIsNullable() {
         return isNullable;
     }

     public void setIsNullable(String isNullable) {
         this.isNullable = isNullable;
     }

     public String getKey() {
         return key;
     }

     public void setKey(String key) {
         this.key = key;
     }

     public String getIsDefault() {
         return isDefault;
     }

     public void setIsDefault(String isDefault) {
         this.isDefault = isDefault;
     }

     public String getExtra() {
         return extra;
     }

     public void setExtra(String extra) {
         this.extra = extra;
     }

     public String getNumericScale() {
         return numericScale;
     }

     public void setNumericScale(String numericScale) {
         this.numericScale = numericScale;
     }

     public String getMunericLength() {
         return munericLength;
     }

     public void setMunericLength(String munericLength) {
         this.munericLength = munericLength;
     }

     public String getCharacterLength() {
         return characterLength;
     }

     public void setCharacterLength(String characterLength) {
         this.characterLength = characterLength;
     }

     public String getMemo() {
         return memo;
     }

     public void setMemo(String memo) {
         this.memo = memo;
     }

 }

 项目源码：http://files.cnblogs.com/hongten/DataElementConfigTool.zip

jar包下载：http://files.cnblogs.com/hongten/DECTool_needParams.jar.zip