Question

我收到错误＆＃34;错误：java.sql.SQLException：列索引无效＆＃34;用下面的代码。能帮到我在哪里做错了吗？

String SEARCH_SQL_COUNT = "SELECT COUNT(*) FROM (
  SELECT AD_TITLE,DESCRIPTION,STATE_NAME,CITY_NAME,CATEGORY,SUBCATEGORY 
  FROM PERSONAL_INFO UNION ALL 
  SELECT AD_TITLE,DESCRIPTION,STATE_NAME,CITY_NAME,CATEGORY,SUBCATEGORY 
  FROM ELEC_AUTO_MERC UNION ALL 
  SELECT AD_TITLE,DESCRIPTION,STATE_NAME,CITY_NAME,CATEGORY,SUBCATEGORY 
  FROM MISSING_PERSON_INFO UNION ALL 
  SELECT AD_TITLE,DESCRIPTION,STATE_NAME,CITY_NAME,CATEGORY,SUBCATEGORY 
  FROM PETS_INFO UNION ALL 
  SELECT AD_TITLE,DESCRIPTION,STATE_NAME,CITY_NAME,CATEGORY,SUBCATEGORY 
  FROM REAL_ESTATE UNION ALL 
  SELECT AD_TITLE,DESCRIPTION,STATE_NAME,CITY_NAME,CATEGORY,SUBCATEGORY 
  FROM SERVICES_INFO) 
  WHERE UPPER(AD_TITLE) LIKE UPPER('%?%') 
  OR UPPER(DESCRIPTION) LIKE UPPER('%?%') 
  OR UPPER(STATE_NAME) LIKE UPPER('%?%') 
  OR UPPER(CITY_NAME) LIKE UPPER('%?%') 
  OR UPPER(CATEGORY) LIKE UPPER('%?%') 
  OR UPPER(SUBCATEGORY) LIKE UPPER('%?%')";

int ad_count=0;

PreparedStatement st_fetch_product_count_1 = conn.prepareStatement(SEARCH_SQL_COUNT);
st_fetch_product_count_1.setString(1,qs_keyword);
st_fetch_product_count_1.setString(2,qs_keyword);
st_fetch_product_count_1.setString(3,qs_keyword);
st_fetch_product_count_1.setString(4,qs_keyword);
st_fetch_product_count_1.setString(5,qs_keyword);
st_fetch_product_count_1.setString(6,qs_keyword);

ResultSet rs_fetch_product_count_1 = st_fetch_product_count_1.executeQuery();

Answer 1

您正在执行SELECT COUNT(*)声明。这样的陈述只会产生一行，其中包含单列，即计数。您的setString()调用预计会有6列，因此索引2已经超出范围。

此外，您尝试在只读结果集上使用setString()，但这是一个不同的问题。

获取错误＆＃34;错误：java.sql.SQLException：列索引无效＆＃34;在JSP代码中

1 个答案: