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【第17章：Java数据库编程】_处理大数据对象（1）—处理CLOB数据

发布时间：2021-01-10 17:56:19编辑：雪饮阅读（）

大数据预处理写入(longtext字段预处理写入)

我本地一个文本文件中有大量的文本内容，而数据表中content字段是longtext类型，最大可容4G内容。对于这类大型“字符串”的写入有单独的写入方案。

import java.sql.Connection;

import java.sql.DriverManager;

import java.sql.Statement;

import java.sql.ResultSet;

import java.sql.PreparedStatement ;

import java.text.SimpleDateFormat ;

import java.io.InputStream;

import java.io.File;

import java.io.FileInputStream;

public class TestJava{

public static final String DBDRIVER="org.gjt.mm.mysql.Driver";

public static final String DBURL="jdbc:mysql://localhost:3306/xy";

public static final String DBUSER="root";

public static final String DBPASS="";

public static void main(String args[]) throws Exception{

Class.forName(DBDRIVER);

Connection conn=DriverManager.getConnection(DBURL,DBUSER,DBPASS);

String sql="insert into message(title,content) values(?,?)";

PreparedStatement pstmt=conn.prepareStatement(sql);

//待输入text文件流

File file=new File("d:"+File.separator+"kasumi.txt");

InputStream input=new FileInputStream(file);

pstmt.setString(1,"this is kasumi");

//大文本内容字段写入(longtext)

pstmt.setAsciiStream(2,input,(int)file.length());

pstmt.executeUpdate();

conn.close();

}

大数据预处理读取(longtext字段预处理读取)

import java.sql.Connection;

import java.sql.DriverManager;

import java.sql.Statement;

import java.sql.ResultSet;

import java.sql.PreparedStatement ;

import java.text.SimpleDateFormat ;

import java.io.InputStream;

import java.io.File;

import java.io.FileInputStream;

import java.io.InputStream ;

import java.util.Scanner ;

public class TestJava{

public static final String DBDRIVER="org.gjt.mm.mysql.Driver";

public static final String DBURL="jdbc:mysql://localhost:3306/xy";

public static final String DBUSER="root";

public static final String DBPASS="";

public static void main(String args[]) throws Exception{

Class.forName(DBDRIVER);

Connection conn=DriverManager.getConnection(DBURL,DBUSER,DBPASS);

String sql="select title,content from message where id=?";

PreparedStatement pstmt=conn.prepareStatement(sql);

pstmt.setInt(1,6);

ResultSet rs=pstmt.executeQuery();

if(rs.next()){

String title=rs.getString(1);

System.out.println("标题:"+title) ;

StringBuffer content=new StringBuffer();

InputStream input=rs.getAsciiStream(2);

Scanner scan=new Scanner(input);

//设定回车+换行(\r+\n)为分隔符（在内容中有隐藏）

scan.useDelimiter("\r\n");

while(scan.hasNext()){

//每行读取完毕之后追加一个换行符号（和上面并不冲突，这里是在控制台中换行）

content.append(scan.next()).append("\n") ;

}

input.close() ;

System.out.println("内容:"+content) ;

}

rs.close();

pstmt.close();

conn.close();

}

D:\>javac TestJava.java

D:\>java TestJava

标题:this is kasumi

内容:1KHXJJKK9W-eyJsaWNlbnNlSWQiOiIxS0hYSkpLSzlXIiwibGljZW5zZWVOYW1lIjoi5rC45LmF5r+A5rS7IGlkZWEubWVkZW1pbmcuY29tIiwiYXNzaWduZWVOYW1lIjoiIiwiYXNzaWduZWVFbWFpbCI6IiIsImxpY2Vuc2VSZXN0cmljdGlvbiI6IiIsImNoZWNrQ29uY3VycmVudFVzZSI6ZmFsc2UsInByb2R1Y3RzIjpbeyJjb2RlIjoiSUkiLCJwYWlkVXBUbyI6IjIwMjAtMDQtMjUiLCJleHRlbmRlZCI6ZmFsc2V9LHsiY29kZSI6IkFDIiwicGFpZFVwVG8iOiIyMDIwLTA0LTI1IiwiZXh0ZW5kZWQiOmZhbHNlfSx7ImNvZGUiOiJEUE4iLCJwYWlkVXBUbyI6IjIwMjAtMDQtMjUiLCJleHRlbmRlZCI6dHJ1ZX0seyJjb2RlIjoiUlNDIiwicGFpZFVwVG8iOiIyMDIwLTA0LTI1IiwiZXh0ZW5kZWQiOnRydWV9LHsiY29kZSI6IlBTIiwicGFpZFVwVG8iOiIyMDIwLTA0LTI1IiwiZXh0ZW5kZWQiOmZhbHNlfSx7ImNvZGUiOiJSU0YiLCJwYWlkVXBUbyI6IjIwMjAtMDQtMjUiLCJleHRlbmRlZCI6dHJ1ZX0seyJjb2RlIjoiR08iLCJwYWlkVXBUbyI6IjIwMjAtMDQtMjUiLCJleHRlbmRlZCI6ZmFsc2V9LHsiY29kZSI6IkRNIiwicGFpZFVwVG8iOiIyMDIwLTA0LTI1IiwiZXh0ZW5kZWQiOnRydWV9LHsiY29kZSI6IkNMIiwicGFpZFVwVG8iOiIyMDIwLTA0LTI1IiwiZXh0ZW5kZWQiOmZhbHNlfSx7ImNvZGUiOiJSUzAiLCJwYWlkVXBUbyI6IjIwMjAtMDQtMjUiLCJleHRlbmRlZCI6dHJ1ZX0seyJjb2RlIjoiUkMiLCJwYWlkVXBUbyI6IjIwMjAtMDQtMjUiLCJleHRlbmRlZCI6dHJ1ZX0seyJjb2RlIjoiUkQiLCJwYWlkVXBUbyI6IjIwMjAtMDQtMjUiLCJleHRlbmRlZCI6ZmFsc2V9LHsiY29kZSI6IlBDIiwicGFpZFVwVG8iOiIyMDIwLTA0LTI1IiwiZXh0ZW5kZWQiOmZhbHNlfSx7ImNvZGUiOiJSU1YiLCJwYWlkVXBUbyI6IjIwMjAtMDQtMjUiLCJleHRlbmRlZCI6dHJ1ZX0seyJjb2RlIjoiUlNVIiwicGFpZFVwVG8iOiIyMDIwLTA0LTI1IiwiZXh0ZW5kZWQiOmZhbHNlfSx7ImNvZGUiOiJSTSIsInBhaWRVcFRvIjoiMjAyMC0wNC0yNSIsImV4dGVuZGVkIjpmYWxzZX0seyJjb2RlIjoiV1MiLCJwYWlkVXBUbyI6IjIwMjAtMDQtMjUiLCJleHRlbmRlZCI6ZmFsc2V9LHsiY29kZSI6IkRCIiwicGFpZFVwVG8iOiIyMDIwLTA0LTI1IiwiZXh0ZW5kZWQiOmZhbHNlfSx7ImNvZGUiOiJEQyIsInBhaWRVcFRvIjoiMjAyMC0wNC0yNSIsImV4dGVuZGVkIjp0cnVlfSx7ImNvZGUiOiJQREIiLCJwYWlkVXBUbyI6IjIwMjAtMDQtMjUiLCJleHRlbmRlZCI6dHJ1ZX0seyJjb2RlIjoiUFdTIiwicGFpZFVwVG8iOiIyMDIwLTA0LTI1IiwiZXh0ZW5kZWQiOnRydWV9LHsiY29kZSI6IlBHTyIsInBhaWRVcFRvIjoiMjAyMC0wNC0yNSIsImV4dGVuZGVkIjp0cnVlfSx7ImNvZGUiOiJQUFMiLCJwYWlkVXBUbyI6IjIwMjAtMDQtMjUiLCJleHRlbmRlZCI6dHJ1ZX0seyJjb2RlIjoiUFBDIiwicGFpZFVwVG8iOiIyMDIwLTA0LTI1IiwiZXh0ZW5kZWQiOnRydWV9LHsiY29kZSI6IlBSQiIsInBhaWRVcFRvIjoiMjAyMC0wNC0yNSIsImV4dGVuZGVkIjp0cnVlfSx7ImNvZGUiOiJQU1ciLCJwYWlkVXBUbyI6IjIwMjAtMDQtMjUiLCJleHRlbmRlZCI6dHJ1ZX0seyJjb2RlIjoiRFAiLCJwYWlkVXBUbyI6IjIwMjAtMDQtMjUiLCJleHRlbmRlZCI6dHJ1ZX0seyJjb2RlIjoiUlMiLCJwYWlkVXBUbyI6IjIwMjAtMDQtMjUiLCJleHRlbmRlZCI6dHJ1ZX0seyJjb2RlIjoiRFBBIiwicGFpZFVwVG8iOiIyMDIwLTA0LTI1IiwiZXh0ZW5kZWQiOnRydWV9XSwibWV0YWRhdGEiOiIwMTIwMjAwMzI2UFBBTTAwMDAwNSIsImhhc2giOiIxNzM0NDY1MC8wOjczNTczNTY5OSIsImdyYWNlUGVyaW9kRGF5cyI6NywiYXV0b1Byb2xvbmdhdGVkIjpmYWxzZSwiaXNBdXRvUHJvbG9uZ2F0ZWQiOmZhbHNlfQ==-Lk9cdpG0SUPz73rDIT+jbicLSpW+HbJCq0r/bGlAeD83knlmUolpmOlVwb6I7wZMOl18JpmCN9hl6sQI8YgzwaLX6hc9NC0lIs8q5hojPNu0V3NXwVpJUTTyMKTc060LhCq6W6O5FGy5qw0BvAWWSH+zbwMCJ6QXhb8S1p87F5gFY0SFArwwuejgJYzAPyKc8cIT6R7hYD0YO0A3+QU7cNiXt3sTIT1k7cxNUZWuk6g/LQg/UAIayp/PNV+7HAqSCj48z4a6DRmtT9u6jibY+EYPpGMR/Nn60cNuj6fCrexgt40PYBCexCsjO08eWzPSsIXucnCI3mv4elV6NtOkZQ==-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

婵?椿鐮?

鍦ㄨ彍鍗曟爮 Help涓?鎷?Edit Custom VM Options 鈥?

-javaagent:C:\Program Files\JetBrains\PhpStorm 2019.1\bin\jetbrains-agent.jar

鍏抽棴PhpStorm锛岄噸鏂版墦寮?悗鐐瑰嚮鑿滃崟鏍忎腑鐨?鈥淗elp鈥?涓殑鈥淩egister鈥濓紝閫夋嫨Activation code杈撳叆涓嬮潰鐨勬縺娲荤爜瀹屾垚瀹屾垚婵?椿銆?

YSU8RP0T0H-eyJsaWNlbnNlSWQiOiJZU1U4UlAwVDBIIiwibGljZW5zZWVOYW1lIjoid2VueWFuanVuIiwiYXNzaWduZWVOYW1lIjoiIiwiYXNzaWduZWVFbWFpbCI6IiIsImxpY2Vuc2VSZXN0cmljdGlvbiI6IiIsImNoZWNrQ29uY3VycmVudFVzZSI6ZmFsc2UsInByb2R1Y3RzIjpbeyJjb2RlIjoiSUkiLCJmYWxsYmFja0RhdGUiOiIyMDg5LTA3LTA3IiwicGFpZFVwVG8iOiIyMDg5LTA3LTA3In0seyJjb2RlIjoiQUMiLCJmYWxsYmFja0RhdGUiOiIyMDg5LTA3LTA3IiwicGFpZFVwVG8iOiIyMDg5LTA3LTA3In0seyJjb2RlIjoiRFBOIiwiZmFsbGJhY2tEYXRlIjoiMjA4OS0wNy0wNyIsInBhaWRVcFRvIjoiMjA4OS0wNy0wNyJ9LHsiY29kZSI6IlBTIiwiZmFsbGJhY2tEYXRlIjoiMjA4OS0wNy0wNyIsInBhaWRVcFRvIjoiMjA4OS0wNy0wNyJ9LHsiY29kZSI6IkdPIiwiZmFsbGJhY2tEYXRlIjoiMjA4OS0wNy0wNyIsInBhaWRVcFRvIjoiMjA4OS0wNy0wNyJ9LHsiY29kZSI6IkRNIiwiZmFsbGJhY2tEYXRlIjoiMjA4OS0wNy0wNyIsInBhaWRVcFRvIjoiMjA4OS0wNy0wNyJ9LHsiY29kZSI6IkNMIiwiZmFsbGJhY2tEYXRlIjoiMjA4OS0wNy0wNyIsInBhaWRVcFRvIjoiMjA4OS0wNy0wNyJ9LHsiY29kZSI6IlJTMCIsImZhbGxiYWNrRGF0ZSI6IjIwODktMDctMDciLCJwYWlkVXBUbyI6IjIwODktMDctMDcifSx7ImNvZGUiOiJSQyIsImZhbGxiYWNrRGF0ZSI6IjIwODktMDctMDciLCJwYWlkVXBUbyI6IjIwODktMDctMDcifSx7ImNvZGUiOiJSRCIsImZhbGxiYWNrRGF0ZSI6IjIwODktMDctMDciLCJwYWlkVXBUbyI6IjIwODktMDctMDcifSx7ImNvZGUiOiJQQyIsImZhbGxiYWNrRGF0ZSI6IjIwODktMDctMDciLCJwYWlkVXBUbyI6IjIwODktMDctMDcifSx7ImNvZGUiOiJSTSIsImZhbGxiYWNrRGF0ZSI6IjIwODktMDctMDciLCJwYWlkVXBUbyI6IjIwODktMDctMDcifSx7ImNvZGUiOiJXUyIsImZhbGxiYWNrRGF0ZSI6IjIwODktMDctMDciLCJwYWlkVXBUbyI6IjIwODktMDctMDcifSx7ImNvZGUiOiJEQiIsImZhbGxiYWNrRGF0ZSI6IjIwODktMDctMDciLCJwYWlkVXBUbyI6IjIwODktMDctMDcifSx7ImNvZGUiOiJEQyIsImZhbGxiYWNrRGF0ZSI6IjIwODktMDctMDciLCJwYWlkVXBUbyI6IjIwODktMDctMDcifSx7ImNvZGUiOiJSU1UiLCJmYWxsYmFja0RhdGUiOiIyMDg5LTA3LTA3IiwicGFpZFVwVG8iOiIyMDg5LTA3LTA3In1dLCJoYXNoIjoiMTI3OTY4NzcvMCIsImdyYWNlUGVyaW9kRGF5cyI6NywiYXV0b1Byb2xvbmdhdGVkIjpmYWxzZSwiaXNBdXRvUHJvbG9uZ2F0ZWQiOmZhbHNlfQ==-HSfu7EkmAbBghJyleC4kIHxhnIxoBgRU530vuytwdsNLEoXpQ7jWow5j46qnrEZQr8d///E0EsED8rmc8O/wKXlGnmV5dIdgU81/W1PHyWo3lrg+i0z8i2FFUQoMkXo2D7SE17tjyDeIPyrLX5Os918lLQWJE3j2SAFrNMWQWuf7dicTqbaYjQ9Rl54sDJRFdGH39cObBueN+bltQ3KwCLO07gGxp8Ddt9zE8WpBp0pfhUjU8chLxZ9f3Lu/oPlLVceGbeP+ykSIDXlIZGKgX/EgQy25JOegDuM1eG3nqGmAzKeCbH1A0RWBB3FMZDEP2vxUW4ZTjnlWIyJ0E2nBwA==-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

0.0.0.0 account.jetbrains.com

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windows竟然也支持重定向

D:\>java TestJava > d:\temp.txt

D:\>type d:\temp.txt

标题:this is kasumi

婵?椿鐮?

鍦ㄨ彍鍗曟爮 Help涓?鎷?Edit Custom VM Options 鈥?

-javaagent:C:\Program Files\JetBrains\PhpStorm 2019.1\bin\jetbrains-agent.jar

0.0.0.0 account.jetbrains.com

0.0.0.0 www.jetbrains.com

更简单的获取大数据对象（longtext）支持仅获取该字段部分内容以及获取的内容的截取（从指定下标到另外一个指定下标）

import java.sql.Connection;

import java.sql.DriverManager;

import java.sql.Statement;

import java.sql.ResultSet;

import java.sql.PreparedStatement ;

import java.text.SimpleDateFormat ;

import java.io.InputStream;

import java.io.File;

import java.io.FileInputStream;

import java.io.InputStream ;

import java.util.Scanner ;

import java.sql.Clob;

public class TestJava{

public static final String DBDRIVER="org.gjt.mm.mysql.Driver";

public static final String DBURL="jdbc:mysql://localhost:3306/xy";

public static final String DBUSER="root";

public static final String DBPASS="";

public static void main(String args[]) throws Exception{

Class.forName(DBDRIVER);

Connection conn=DriverManager.getConnection(DBURL,DBUSER,DBPASS);

String sql="select title,content from message where id=?";

PreparedStatement pstmt=conn.prepareStatement(sql);

//设定预处理id变量

pstmt.setInt(1,6);

ResultSet rs=pstmt.executeQuery();

if(rs.next()){

String title=rs.getString(1);

System.out.println("标题:"+title) ;

//获取longtext字段

Clob c=rs.getClob(2);

//仅仅读取该字段的前100个内容

c.truncate(100) ;

//起始下标不能小于1，longtext字段内容通过Clob的getSubString得到String类型

String content=c.getSubString(1,(int)c.length());;

System.out.println("内容:"+content) ;

}

rs.close();

pstmt.close();

conn.close();

}

D:\>javac TestJava.java

D:\>java TestJava

标题:this is kasumi

内容:1KHXJJKK9W-eyJsaWNlbnNlSWQiOiIxS0hYSkpLSzlXIiwibGljZW5zZWVOYW1lIjoi5rC45LmF5r+A5rS7IGlkZWEubWVkZW1pb

关键字词：java,大数据,longtext,CLOB

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【第17章：Java数据库编程】_处理大数据对象（1）—处理CLOB数据

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