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In some cases, your system may return an error code indicating that a java servlet is writing an XML response. This problem can have several causes.
The recommendation is to make your code a little more meaningful. Servlets don’t have to prove that they are importing Java from .sql. Put the prefix in a separate class and try to allow the servlet to use its methods.
You create XML du in the craziest way imaginable by concatenating strings like this. Why not choose JDOM or at least Use Generator? chains
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Here are a few ideas to keep in mind when layering. Start with an object selling a toy – after all, Java is an object-based Badservlet language:
Batch-oriented.model;selling public flair Private channel sale ID; private string homeId; private string agentId; private string client ID; Open sale (saleId string, homeId string, agentId string, customerId string) customer string getSaleId() return sale identifier; public string getHomeId() come back home; public string getAgentId() return agent ID; public GetCustomerId() character string identifier of the buyer of the sale; @Crush localLarge community String toString() Return "Balance" + "Sale_ID='" + Sales_ID + ''' + ", homeId='" + homeId + ''' + ", agent_id='" + agent_id + ''' + ", client id = '" + client id + ''' + ''; Badservlet.persistence package;import badservlet.model.Sale;import java.sql.SQLException;import java.util.List;Sale Dao Interface public List find() throws SQLException; 
Badservlet.persistence package;import badservlet.model.Sale;import javax.sql.DataSource;import java.sql.Connection;import java.sql.ResultSet;import java.sql.SQLException;java.sql.import statement;import java.util.ArrayList;import list java.util.Public;SaleDaoImpl class SaleDao equipment{ final private stationary string = select_all_sql "SELECT sale_id, home_id, agent_id, customer_id FROM sale"; private login connection; public SaleDaoImpl (login login) this.Match connection with connection; public SaleDaoImpl(DataSource dataSource) covers SQLException this(datasource.getConnection()); public List find() covers SQL exception { List allSales = new ArrayList(); st= operatornull; result set rs = null; To attempt holy = this.connection.createStatement(); rsSt =.executeQuery(SELECT_ALL_SQL); how do you (rs.next()) The string saleId means rs.getString("sale_id"); String = homeId rs. getstring("home_id"); String agentId = rs.getString("agent_id"); String CustomerID = rs.getString("CustomerID"); Sale = new sale (saleId, homeId, agentId, customerId); allSales.add(Sales); network (SQLException e) e.printStackTrace(); finally
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