菜鸟求助?

[xuwei1008]

/*
*网站JAVABEAN
*添加一条新信息,
*添加成功显示提示及继续添加的链接.
*/
package mybean;

import java.sql.*;

public class Publish {

private PreparedStatement pstmt = null;
private Connection conn = null;
private String city;
private String title;
private String style;
private String content;
private String pass;
private String chec;
private String addMessage;



public Publish(){}

public void setCity(String city){
this.city=city;
}
public void setTitle(String title){
this.title=title;
}
public void setStyle(String style){
this.style=style;
}
public void setContent(String content){
//替换HTML字符输出的格式
content=content.replace("\n","<BR/>");
content=content.replace(" "," ");
this.content=content;
}
public void setPass(String pass){
this.pass=pass;
}
public void setChec(String chec){
this.chec=chec;
}

public String getCity(){
return this.city;
}
public String getTitle(){
return this.title;
}
public String getStyle(){
return this.style;
}
public String getContent(){
return this.content;
}
public String getPass(){
return this.pass;
}
public String getChec(){
return this.chec;
}
public String getAddMessage(){
conn = DBConnSource.getConnection("jdbc/myweb");

try{
String sql="INSERT INTO adver VALUES(?,?,?,?,?,?,?,?)";
pstmt = DBConnSource.getPstmt(conn,sql);
java.util.Date date=new java.util.Date();
Timestamp tt=new Timestamp(date.getTime());
pstmt.setInt(1,0);
pstmt.setString(2,city);
pstmt.setString(3,style);
pstmt.setString(4,title);
pstmt.setString(5,content);
pstmt.setTimestamp(6,tt);
pstmt.setString(7,pass);
pstmt.setString(8,chec);

int flag=pstmt.executeUpdate();
if(flag>0){
addMessage="成功添加"+flag+"条记录!";
}else{
addMessage="添加记录失败";
}
}catch(SQLException e) {
e.printStackTrace();
}finally{
DBConnSource.close(pstmt);
DBConnSource.close(conn);
}
return addMessage;
}
}
====================================
这是一段向数据库中添加记录的javabean.我想在里面判断一个输入(title字段)是否为空,如果为空就转到一个错误页面(error.jsp),写了许多次都不行.错误很多.想请各位高人来帮帮忙.分不多.谢谢了