在Java中使用LIMIT命令和Prepared语句时出现MySQL语法错误
我正在用Java编写代码,每次运行这段代码时,我都想从MySQL表的下一行开始在Java中使用LIMIT命令和Prepared语句时出现MySQL语法错误,java,mysql,jdbc,prepared-statement,sql-limit,Java,Mysql,Jdbc,Prepared Statement,Sql Limit,我正在用Java编写代码,每次运行这段代码时,我都想从MySQL表的下一行开始 String timh1 = "1"; String timh2 = "2"; PreparedStatement st = null; String sqlGrammes = "SELECT SURNAME ,KATHGORIA, AFM , NAME FROM EMPLOYEE LIMIT ?,? "; try { st = connection.prepareStatement(sqlGrammes);
String timh1 = "1";
String timh2 = "2";
PreparedStatement st = null;
String sqlGrammes = "SELECT SURNAME ,KATHGORIA, AFM , NAME FROM EMPLOYEE LIMIT ?,? ";
try {
st = connection.prepareStatement(sqlGrammes);
st.setString(1, timh1);
st.setString(2, timh2);
但它告诉我这个错误:
com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException:您的SQL语法有错误;检查与MySQL服务器版本对应的手册,以了解第1行“1”和“2”附近使用的正确语法
limit
接受整数参数,因此应该使用int
s,而不是String
s:
int timh1 = 1;
int timh2 = 2;
PreparedStatement st = null;
String sqlGrammes = "SELECT SURNAME ,KATHGORIA, AFM , NAME FROM EMPLOYEE LIMIT ?,? ";
try {
st = connection.prepareStatement(sqlGrammes);
st.setInt(1, timh1); // notice the setInt
st.setInt(2, timh2); // here too
没有事先准备好的声明,我就能做到这一点
int i = 0;
int j = 1;
sql = "Select SURNAME ,KATHGORIA, AFM , NAME FROM EMPLOYEE limit "+i+ ","+j;
将第一行作为输出。看起来您无法参数化限制值。可能是这样,但为什么?请注意SQL注入