java一个数据整理的方法代码实例

java一个数据整理的方法代码实例

这篇文章主要介绍了java一个数据整理的方法代码实例,文中通过示例代码介绍的非常详细，对大家的学习或者工作具有一定的参考学习价值,需要的朋友可以参考下

import java.sql.*;

public class Main {

//本地数据库

// static final String JDBC_DRIVER = "com.mysql.jdbc.Driver";

// static final String DB_URL = "jdbc:mysql://127.0.0.1:3306/aite?useSSL=false&serverTimezone=UTC";

// static final String USER = "root";

// static final String PASS = "root";

//测试服务器数据库

static final String JDBC_DRIVER = "com.mysql.jdbc.Driver";

static final String DB_URL = "jdbc:mysql://192.168.1.236:3306/aite?useSSL=false&serverTimezone=UTC";

static final String USER = "root";

static final String PASS = "c6f20omhhg";

public static void main(String[] args) {

// Connection conn = null;

// Statement stmt = null;

// Statement stmt2 = null;

// try{

// Class.forName(JDBC_DRIVER);

// System.out.println("连接数据库...");

// conn = DriverManager.getConnection(DB_URL,USER,PASS);

// System.out.println(" 实例化Statement对象...");

// stmt = conn.createStatement();

// String sql;

// sql = "SELECT id,id2 FROM sys_code_region where id2>736978";

// ResultSet rs = stmt.executeQuery(sql);

// int a=2;

// while(rs.next()){

// String id= rs.getString("id");

// //String name = rs.getString("id2");

// int b=rs.getInt("id2");

// String sql2;

// sql2= "update base_area set area_code="+id+" where id='"+b+"'";

// stmt2 = conn.createStatement();

// //stmt2.executeQuery(sql2);

// stmt2.execute(sql2);

// a++;

// System.out.print("ID: " + id);

// System.out.print(", id2: " + b);

// System.out.print("\n");

// }

// rs.close();

// stmt.close();

// conn.close();

// }catch(SQLException se){

// se.printStackTrace();

// }catch(Exception e){

// e.printStackTrace();

// }finally{

// try{

// if(stmt!=null) stmt.close();

// }catch(SQLException se2){

// }

// try{

// if(conn!=null) conn.close();

// }catch(SQLException se){

// se.printStackTrace();

// }

// }

// System.out.println("Success!");

//getPids();

setPriority();

}

/**

* pids查询插入递归方法

*/

public static void getPids(){

Connection conn = null;

Statement stmt = null;

Statement stmt2 = null;

String pids=null;

try{

Class.forName(JDBC_DRIVER);

System.out.println("连接数据库...");

conn = DriverManager.getConnection(DB_URL,USER,PASS);

System.out.println(" 实例化Statement对象...");

stmt = conn.createStatement();

String sql;

sql = "SELECT id,pid,name FROM base_area where id=2210";

ResultSet rs = stmt.executeQuery(sql);

while(rs.next()){

String str1=rs.getString("id");

String str2=rs.getString("pid");

String str3=rs.getString("name");

int a =Integer.parseInt(str1);

int b =Integer.parseInt(str2);

pids=str2;

int c=0;

c=getPid(b);

if (c>0){

do{

if (c >1) {

pids = c + "," + pids;

c = getPid(c);

}

}while (c>1);

pids = c + "," + pids;

}

stmt2 = conn.createStatement();

String sql2;

sql2= "update base_area set pids='"+pids+"' where id="+a;

stmt2.execute(sql2);

System.out.println("id: "+a+",name:"+str3+", pids: "+pids);

}

rs.close();

stmt.close();

conn.close();

}catch(SQLException se){

se.printStackTrace();

}catch(Exception e){

e.printStackTrace();

}finally{

try{

if(stmt!=null) stmt.close();

}catch(SQLException se2){

}

try{

if(conn!=null) conn.close();

}catch(SQLException se){

se.printStackTrace();

}

}

System.out.println("Success!");

}

/**

* pid 查询方法

* @param id

* @return pid

*/

public static Integer getPid(int id){

Connection conn3 = null;

Statement stmt3 = null;

int pid =0;

try{

conn3= DriverManager.getConnection(DB_URL,USER,PASS);

stmt3=conn3.createStatement();

String sql3="select pid from base_area where id="+id;

ResultSet rs3=stmt3.executeQuery(sql3);

while (rs3.next()) {

String str = rs3.getString("pid");

pid = Integer.parseInt(str);

}

rs3.close();

stmt3.close();

conn3.close();

}catch(SQLException se){

se.printStackTrace();

}catch(Exception e){

e.printStackTrace();

}finally{

try{

if(stmt3!=null) stmt3.close();

}catch(SQLException se2){

}

try{

if(conn3!=null) conn3.close();

}catch(SQLException se){

se.printStackTrace();

}

}

return pid;

}

/**

* 排序方法

*/

public static void setPriority(){

try {

SystenrvmMgnjUm.out.println("连接数据库...");

Connection conn4 = DriverManager.getConnection(DB_URL, USER, PASS);

System.out.println(" 实例化Statement对象...");

Statement stmt4 = conn4.createStatement();

ResultSet rs4 = stmt4.executeQuery("select id from base_area ");

while (rs4.next()){

int id = rs4.getInt("id");

Statement stmt5=conn4.createStatement();

String sqlstr1="select id,pid from base_area where pid="+id+" ORDER BY id ";

ResultSet rs5=stmt5.executeQuery(sqlstr1);

rs5.last();

int count=rs5.getRow();

if(count>0) {

rs5.beforeFirst();

int i=1;

while (rs5.next()) {

int id2 = rs5.getInt("id");

Statement stmt6 = conn4.createStatement();

String sqlstr2="update base_area set priority=" + i + " where id=" + id2;

stmt6.execute(sqlstr2);

System.out.println("id:" + id2 + ", priority:" + i);

i++;

}

}

//System.out.println(id);

}

}

catch (SQLException se){

se.printStackTrace();

}

catch (Exception e){

e.printStackTrace();

}

System.out.println("Complete!");

}

}

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