建立student表的SQL语句如下：
--删除student表的SQL语句 drop table student; --查询表格项数大小的语句 select count(*) from student; --建立student表，注意key的预留空间较大 create table student (name varchar(120) not null, goal varchar(20) not null, primary key(name));
程序代码如下：
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.ResultSetMetaData;
import java.sql.SQLException;
import java.sql.Statement;
import java.sql.Timestamp;
import java.sql.Types;
import java.util.ArrayList;
import java.util.Calendar;
import java.util.Collections;
import java.util.Formatter;
import java.util.LinkedHashMap;
import java.util.List;
import java.util.Map;
import java.util.Random;
import java.util.UUID;
import java.util.concurrent.CountDownLatch;
import java.util.logging.Level;
import java.util.logging.Logger;
public class InsertTest {
private static Logger logger = Logger.getLogger(InsertTest.class.getName());
//驱动程序名
private static final String DB_DRIVER = "com.mysql.cj.jdbc.Driver";
//URL指向要访问的数据库名mysql
private static final String DB_URL = "jdbc:mysql://localhost:3306/test?rewriteBatchedStatements=true&useSSL=false&serverTimezone=UTC";
//MySQL配置时的用户名
private static final String DB_USERNAME = "root";
//MySQL配置时的密码
private static final String DB_PASSWORD = "…………";
private static Random random = new Random(10000);
//我们要测试的表的名称
private static final String TABLE_NAME = "student";
private int batchSize;//一批提交的事务数
private int concurrent;//
private int sampling;//
public static void main(String[] args) throws Exception {
printHeader();
int[] concurrentList = new int[]{1, 5, 10, 20};//默认测试1，5，10，20个并发
int[] batchSizeList = new int[] {100, 200, 500, 1000};//一批提交的事务数
for (int concurrent : concurrentList) {
for (int batchSize : batchSizeList) {
//对以上每种组合都run一次
new InsertTest(batchSize, concurrent).run(true);
}
Thread.sleep(10000);
}
}
/*-----------InsertTest类的构造函数一-------------*/
public InsertTest(final int batchSize, final int concurrent) throws Exception {
this.batchSize = batchSize;
this.concurrent = concurrent;
this.sampling = 100;
}
/*-----------InsertTest类的构造函数二-------------*/
public InsertTest(final int batchSize, final int concurrent, final int sampling) throws Exception {
this.batchSize = batchSize;
this.concurrent = concurrent;
this.sampling = sampling;
}
/*-----------开始运行run方法-------------*/
public void run(boolean printResult) throws Exception {
final List<Long> results = Collections.synchronizedList(new ArrayList<Long>());
final CountDownLatch startGate = new CountDownLatch(concurrent);
final CountDownLatch endGate = new CountDownLatch(concurrent);
for (int idxConcurrent = 0; idxConcurrent < concurrent; idxConcurrent++) {
new Thread(new Runnable() {
public void run() {
startGate.countDown();
try {
long time = execute();
long avg = batchSize * sampling * 1000 / time;;
results.add(Long.valueOf(avg));
} catch(Exception ex) {
ex.printStackTrace();
} finally {
endGate.countDown();
}
}
}).start();
}
endGate.await();
Collections.sort(results);
//每种组合跑完之后都打印出一行数据
if (printResult) {
printResult(batchSize, concurrent, results);
}
}
public long execute() throws Exception {
Connection conn = getConnection();
Map<String, Integer> columns = queryTableColumns(conn);
String insertSQL = generateInsertSQL(columns);
PreparedStatement ps = conn.prepareStatement(insertSQL);
try {
long start = System.currentTimeMillis();
for (int i = 0; i < sampling; i++) {
execute(conn, ps, columns);
}
long stop = System.currentTimeMillis();
return stop - start;
} catch(Exception ex) {
logger.log(Level.SEVERE, null, ex);
conn.rollback();
conn.close();
throw ex;
} finally {
conn.close();
}
}
//执行插入语句出错。 ps：INSERT INTO student1(name,goal)VALUES(** NOT SPECIFIED **,** NOT SPECIFIED **)
public void execute(Connection conn, PreparedStatement ps, Map<String, Integer> columns) throws Exception {
try {
for (int idx = 0; idx < batchSize; idx++) {
int idxColumn = 1;
//这个地方实际上是对每一列进行循环。（1）如果该列是key对应的列………… （2）该列为普通列
for (String column : columns.keySet()) {
//如果该列为name列即key对应的列，就单独为他生成一个主键。
//为了执行忽略大小写的比较，使用equalsIgnoreCase
if (column.equalsIgnoreCase("name")) {
//给JDBC的SQL语句的占位符赋值的,即是下面的“？ connection.prepareStatement("insert into t_user values (?,?)");
//UUID.randomUUID().toString()是java JDK提供的一个自动生成主键的方法。
ps.setObject(idxColumn, UUID.randomUUID().toString());
}
//否则就是普通列，随便填充点东西进去就好了。
else {
ps.setObject(idxColumn, generateColumnValue(columns.get(column)));
}
idxColumn ++;
}
ps.addBatch();
}
//批量执行SQL语句
ps.executeBatch();
conn.commit();
ps.clearBatch();
}
//如果上面出错了就捕获其异常
catch (SQLException ex) {
logger.log(Level.SEVERE, null, ex);
if (null != ex.getNextException()) {
logger.log(Level.SEVERE, null, ex.getNextException());
}
conn.rollback();
throw ex;
}
}
//根据获取的列信息，生成插入的sql语句。
private String generateInsertSQL(Map<String, Integer> columns) throws SQLException {
StringBuilder sb = new StringBuilder();
StringBuffer sbColumns = new StringBuffer();
StringBuffer sbValues = new StringBuffer();
sb.append("INSERT INTO ").append(TABLE_NAME);
for (String column : columns.keySet()) {
if (sbColumns.length() > 0) {
sbColumns.append(",");
sbValues.append(",");
}
sbColumns.append(column);
sbValues.append("?");
}
sb.append("(").append(sbColumns).append(")");
sb.append("VALUES");
sb.append("(").append(sbValues).append(")");
return sb.toString();
}
private Map<String, Integer> queryTableColumns(Connection conn) throws Exception {
Map<String, Integer> columns = new LinkedHashMap<String, Integer>();
String sql = "SELECT * FROM " + TABLE_NAME + " WHERE 1=0";
Statement stmt = conn.createStatement();
ResultSet rs = stmt.executeQuery(sql);
ResultSetMetaData rsmd = rs.getMetaData();
for (int i = 1; i <= rsmd.getColumnCount(); i++) {
columns.put(rsmd.getColumnName(i), rsmd.getColumnType(i));
}
return columns;
}
//生成列值
private Object generateColumnValue(int type) {
Object obj = null;
switch (type) {
case Types.DECIMAL:
case Types.NUMERIC:
case Types.DOUBLE:
case Types.FLOAT:
case Types.REAL:
case Types.BIGINT:
case Types.TINYINT:
case Types.SMALLINT:
case Types.INTEGER:
obj = random.nextInt(10000);
break;
case Types.DATE:
obj = Calendar.getInstance().getTime();
break;
case Types.TIMESTAMP:
obj = new Timestamp(System.currentTimeMillis());
break;
default:
obj = String.valueOf(random.nextInt(10000));
break;
}
return obj;
}
//连接MYSQL数据库。
private Connection getConnection() throws Exception {
Class.forName(DB_DRIVER);
Connection conn = DriverManager.getConnection(DB_URL, DB_USERNAME, DB_PASSWORD);
conn.setAutoCommit(false);
return conn;
}
//打印出表头（即列的信息）
private static void printHeader() {
StringBuilder sb = new StringBuilder();
sb.append("\n");
sb.append(new Formatter().format("%15s|%15s|%15s|%15s|%15s", "BATCH_SIZE", "CONCURRENT", "AVG (r/s)", "MIN (r/s)", "MAX (r/s)"));
System.out.println(sb.toString());
}
//打印每次跑完后的统计信息
private static void printResult(int batch, int concurrent, List<Long> results) {
Long total = Long.valueOf(0);
for (Long result : results) {
total += result;
}
StringBuilder sb = new StringBuilder();
sb.append(new Formatter().format("%15s|%15s|%15s|%15s|%15s", batch, concurrent, (total/results.size()), results.get(0), results.get(results.size() - 1)));
System.out.println(sb.toString());
}
}
到此这篇关于MYSQL读写性能测试的简单记录的文章就介绍到这了,更多相关MYSQL读写性能测试内容请搜索
更多相关Mysql内容来自木庄网络博客
标签：Mysql
相关阅读 >>
更多相关阅读请进入《mysql》频道 >>
数据库系统概念 第6版
本书主要讲述了数据模型、基于对象的数据库和XML、数据存储和查询、事务管理、体系结构等方面的内容。
