如何在JDBI sql api中打印@SqlQuery批注

Question

我想知道jdbi sql api处理sql查询究竟是什么用于调试目的.我的接口类如下

public inteface myinteface{
    @SqlQuery("select :c1 from tablename where cond = :cd")
    String returnMeValue(@Bind("c1") String c1, @Bind("cd") Integer cd);
}

后来在另一个班级中称为 String result = myinterfaceclassobject.returnMeValue("Name",1);

我没有得到预期的答案,所以我想看看实际上是什么进入SQL查询.那么有什么方法可以获得最终处理的查询吗？

Answer 1

您可以通过编写SqlCustomizer来记录sql.

import org.skife.jdbi.v2.StatementContext;
import org.skife.jdbi.v2.sqlobject.SqlStatementCustomizer;
import org.skife.jdbi.v2.sqlobject.SqlStatementCustomizerFactory;
import org.skife.jdbi.v2.sqlobject.SqlStatementCustomizingAnnotation;
import org.skife.jdbi.v2.tweak.StatementCustomizer;

import java.lang.annotation.*;
import java.lang.reflect.Method;
import java.sql.PreparedStatement;
import java.sql.SQLException;

@Retention(RetentionPolicy.RUNTIME)
@Target(ElementType.TYPE)
@SqlStatementCustomizingAnnotation(LogSqlFactory.Factory.class)
public @interface LogSqlFactory {

    static class Factory implements SqlStatementCustomizerFactory {

        @Override
        public SqlStatementCustomizer createForMethod(Annotation annotation, Class sqlObjectType, Method method) {
            return null;
        }

        @Override
        public SqlStatementCustomizer createForType(Annotation annotation, Class sqlObjectType) {
            return q -> q.addStatementCustomizer(new StatementCustomizer() {
                @Override
                public void beforeExecution(PreparedStatement stmt, StatementContext ctx) throws SQLException {
                    System.out.println(stmt.toString());
                }

                @Override
                public void afterExecution(PreparedStatement stmt, StatementContext ctx) throws SQLException { }

                @Override
                public void cleanup(StatementContext ctx) throws SQLException { }
            });
        }

        @Override
        public SqlStatementCustomizer createForParameter(Annotation annotation, Class sqlObjectType, Method method, Object arg) {
            return null;
        }
    }

}

只需包含此注释并在SqlObject中使用它.在你的情况下使用这样的注释,

@LogSqlFactory 
public inteface myinteface{
@SqlQuery("select :c1 from tablename where cond = :cd")
    String returnMeValue(@Bind("c1") String c1, @Bind("cd") Integer cd);
}

如果使用自定义记录器进行日志记录,则使用beforeExecution方法.