如何使用java在mySql的表列中存储数组值

Posted 2023-02-26

【中文标题】如何使用java在mySql的表列中存储数组值

【英文标题】：How to Store Array value in table column in mySql using java

【发布时间】：2013-04-15 04:24:44

【问题描述】：

您好，我正在尝试检索两个结果集中的数据。然后我在两个结果集中都存储到字符串数组，在这个过程之后我必须将我的字符串数组存储到另一个表中，所以请告诉我..

try 
    Class.forName("com.mysql.jdbc.Driver");
    Connection con = (Connection) DriverManager.
         getConnection("jdbc:mysql://localhost:3306/lportal", "root", "ubuntu123");
    PreparedStatement stmt = (PreparedStatement) con.
         prepareStatement("SELECT * FROM  Testi_Testimonial where subject = ?");
    stmt.setString(1, search);
    stmt.execute();
    rs = (ResultSet) stmt.getResultSet();
    while (rs.next()) 
      anArray[i] = rs.getString("subject");
      System.out.println(anArray[i]);
      i++;
      count++;
    
    PreparedStatement stmt1 = (PreparedStatement) con.
         prepareStatement("SELECT * FROM Testi_Testimonial where subject != ?");
    stmt1.setString(1, search);
    stmt1.execute();
    rs1 = (ResultSet) stmt1.getResultSet();
    while (rs1.next()) 
      anArray[i] = rs1.getString("subject");
      System.out.println(anArray[i]);
      i++;
      count++;
    
 catch (Exception e) 
  e.printStackTrace();
  System.out.println("problem in connection");

请告诉我应该如何将我的数组存储到Temp 表中？我的“Temp”表有subject 列我想将myArray 存储到subject 列...请告诉我该怎么做。

【参考方案1】：

PreparedStatement ps = 
    (PreparedStatement) con.prepareStatement("insert into temp values(?)");

j=0;
while(rs.next())

    ps.setString(1,anArray[j]);
    ps.executeUpdate();
    j++;

【讨论】：

但我想将我的数组存储到表列中我已经编写了如下查询这样完美吗？我的表名称是 temp_testimonial，列名称是 subject 我想将 myArray 值存储到“Subject” PreparedStatement st = (PreparedStatement) con.prepareStatement("insert into Testi_TestimonialTemp(subject) values(?)");我=0； while(rs.next()) st.setString(1,anArray[i]); st.executeUpdate();我++；

PreparedStatement ps = (PreparedStatement) con.prepareStatement("insert into temp_testimonial values(?)");我=0； while(rs.next()) st.setString(1,anArray[i]); st.executeUpdate();我++； 在主题领域

【参考方案2】：

您只需迭代arrayList。您分别获得了主题列表。

public class TestArrayList 
    public static void main(String[] args) 

        /*create two arrayList*/
        List<String> tempOneList = new ArrayList<String>();
        try 

            Class.forName("com.mysql.jdbc.Driver");
            Connection con = DriverManager.getConnection("jdbc:mysql://localhost:3306/vijay", "root", "root");
            Statement st = con.createStatement();

            ResultSet res = st.executeQuery("SELECT * FROM  subjecttable");

            while (res.next()) 
                tempOneList.add(res.getString("subject"));
            

            ResultSet resOne = st.executeQuery("SELECT * FROM  subjecttabletwo");
            while (resOne.next()) 
                tempOneList.add(resOne.getString("subject"));
            
            System.out.println("temp/List>>--" + tempOneList.size());
            for(int i=0;i<tempOneList.size();i++)
                System.out.println(tempOneList.get(i));
            

         catch (Exception e) 
            e.printStackTrace();
            System.out.println("problem in connection");
        
    

【参考方案3】：

在 rs 中得到结果集后试试这个：

   PreparedStatement st = (PreparedStatement) con.prepareStatement("insert into temp values(?)");
    i=0;
   while(rs.next())
    
      st.setString(1,anArray[i]);
      st.executeUpdate();
      i++;
    

【讨论】：

这将存储在哪个表中？

我的临时表中有“主题”列.. 我想将我的数组存储到该列中怎么办？

PreparedStatement st = (PreparedStatement) con.prepareStatement("insert into Testi_TestimonialTemp(subject) values(?)");

我有这张表，但我无法将 myArray 值存储到表列中

让我们continue this discussion in chat