Java如何设置查询超时限制？
该Statement.setQueryTimeout()方法以秒为单位设置查询执行时间的限制。当该值设置为零时，表示执行没有超时限制。
package org.nhooo.example.jdbc;
import java.sql.Connection;
import java.sql.ResultSet;
import java.sql.Statement;
import java.sql.SQLException;
import java.sql.DriverManager;
public class QueryTimeout {
private static final String URL = "jdbc:mysql://localhost/nhooo";
private static final String USERNAME = "root";
private static final String PASSWORD = "";
public static void main(String[] args) {
try (Connection connection =
DriverManager.getConnection(URL, USERNAME, PASSWORD)) {
Statement stmt = connection.createStatement();
//设置驾驶员等待的秒数
//一个执行给定数量的语句对象
//秒。如果超出限制，则抛出SQLException
//被抛出。
stmt.setQueryTimeout(60);
//执行SQL查询
ResultSet rs = stmt.executeQuery("select * from products");
while (rs.next()) {
System.out.println("code: " + rs.getString("code")
+ " ,product: " + rs.getString("name")
+ " ,price: " + rs.getDouble("price"));
}
} catch (SQLException e) {
e.printStackTrace();
}
}
}Maven依赖
<!-- https://search.maven.org/remotecontent?filepath=mysql/mysql-connector-java/8.0.17/mysql-connector-java-8.0.17.jar -->
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>8.0.17</version>
</dependency>