Question

代码显示.executeUpdate语句中的错误。我试图通过Java执行sql语句。错误显示在

行中

rs = stmt.executeUpdate(upquery);

错误是： 不兼容的类型发现：int 必需：java.sql.ResultSet;

在开始编码之前，我在全球范围内导入了某些内容：

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.Statement;
import java.sql.ResultSet;

行动代码：

try{
    int srl = Integer.parseInt(srlTF.getText());
    String date = dateTF.getText();
    String part = paTF.getText();
    float amt = Float.parseFloat(amtTF.getText());
    float exp = Float.parseFloat(expTF.getText());
    float pro = Float.parseFloat(proTF.getText());
        Class.forName("com.mysql.jdbc.Driver");
    String usr = "root";
    String pwd = "root";
    String DB_URL = "jdbc:mysql://localhost/accounts?user="+usr+"&password="+pwd;
    con = DriverManager.getConnection(DB_URL);
    stmt = con.createStatement(ResultSet.TYPE_SCROLL_SENSITIVE,ResultSet.CLOSE_CURSORS_AT_COMMIT);
    String upquery = "insert into hostmargin_acc values(" + srl +","+ "'"+ date +","+ part +","+ amt +","+ exp +","+ pro + ");" ;
    rs = stmt.executeUpdate(upquery);
    msgLB.setText("BrO! Pwolichu! Save Chietu Kallan");
    }
    catch (Exception ex){
        System.out.println(ex.getMessage());
    }

Answer 1

executeUpdate返回受影响的行数。尝试

String upquery = "insert into hostmargin_acc values(?, ?, ?, ?, ?, ?)";
PreparedStatement statement = 
              connection.prepareStatement(upquery,                                                                                               
                 ResultSet.TYPE_SCROLL_SENSITIVE,ResultSet.CLOSE_CURSORS_AT_COMMIT);
statement.setInt(1, srl);
// set more params...
int rows = statement.executeUpdate();

Answer 2

executeUpdate（）返回一个整数，以指示操作是否成功。您正在ResultSet类型的变量中收集返回的int变量，因此错误。

类似的问题你可以看看这个链接。 [Exception generated when updating table - java

Java Netbeans中.executeUpdate语句出错

2 个答案: