servlet程序不报错，但是不出运行结果（java ：servlet+Spring）?报错
servlet+spring myEclipse
servlet类中：
@Controller
@Scope("prototype")
public class RegistAction extends HttpServlet {
private static final long serialVersionUID = 1L;
//注入Service
@Resource(name="memberService")
private MemberService memberService ;
public void setMemberService(MemberService memberService) {
this.memberService = memberService;
}
public void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
response.setContentType("text/html");
response.setCharacterEncoding("utf-8");
PrintWriter out = response.getWriter();
String username = request.getParameter("username").toString();
int flag = memberService.regist(username);
String result = "";
if(flag == 1){
result="注册成功";
}else if(flag==2){
result="该用户已注册";
}else{
result="系统异常";
}
out.println("<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.01 Transitional//EN\">");
out.println("<HTML>");
out.println(" <HEAD><TITLE>A Servlet</TITLE></HEAD>");
out.println(" <BODY>");
out.print(" This is ");
out.print(this.getClass());
out.println(", using the POST method");
out.println(" </BODY>");
out.println("</HTML>");
out.flush();
out.close();
}
service中：
/**
* 注册
*@param LoginPass
*@return 1：注册成功 2.已注册 0.系统异常
*/
public int regist(String username){
int flag=0;
try {
Connection conn = ConnectionUtil.getConn();
String sql = "select username from users where username = '"+ username +"'";
PreparedStatement psmt = conn.prepareStatement(sql);
ResultSet rs = psmt.executeQuery(sql);
String tempName="";
while(rs.next()){
tempName=rs.getString("username");
}
//如果没有值，保存用户，并提示注册成功
if(tempName.isEmpty()){
saveEntity(user);
flag=1;
}else{
flag=2;
}
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return flag;
}
private void saveEntity(User user) {
try {
Connection conn = ConnectionUtil.getConn();
String sql = "insert into users (username,password,comfirmpwd,phone,email)"
+"values('"+user.getUserName()+","+user.getPassword()+","
+user.getConfirmPwd()+","+user.getPhone()+","+user.getEmail()+"')";
PreparedStatement psmt = conn.prepareStatement(sql);
int count = psmt.executeUpdate(sql);
System.out.println("保存了"+count+"条用户信息");
} catch (SQLException e) {
e.printStackTrace();
}
}
web.xml中：
<servlet>
<servlet-name>RegistAction</servlet-name>
<servlet-class>com.xue.manager.ServletToBeanProxy</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>RegistAction</servlet-name>
<url-pattern>/RegistAction</url-pattern>
</servlet-mapping>
beans.xml中：
<bean id="RegistAction" class="com.xue.action.RegistAction"/>
配置了数据源，但是运行不报错，点击页面注册功能，只出现打印信息“This is class com.xue.action.RegistAction, using the POST method” 没有走写的代码程序？怎么回事呢？
写回答
-
https://developer.aliyun.com/profile/5yerqm5bn5yqg?spm=a2c6h.12873639.0.0.6eae304abcjaIB怪异的用法，你的 <spanstyle="font-family:微软雅黑,Verdana,sans-serif,宋体;font-size:14px;line-height:22px;background-color:#FFFFFF;">ServletToBeanProxy是怎么样的。<divclass="ref">
引用来自“huan”的答案
<divclass=ref_body>怪异的用法，你的 <spanstyle="font-family:微软雅黑,Verdana,sans-serif,宋体;font-size:14px;line-height:22px;background-color:#FFFFFF;">ServletToBeanProxy是怎么样的。去掉这两个注解：
<spanstyle="font-family:微软雅黑,Verdana,sans-serif,宋体;font-size:14.399999618530273px;line-height:22px;background-color:#FFFFFF;">@Controller
试了一下，去掉还是这样结果，是不是Regi实体Action类哪里写错了？自己解决了。
<spanstyle="font-family:微软雅黑,Verdana,sans-serif,宋体;font-size:14.399999618530273px;line-height:22px;background-color:#FFFFFF;">@Scope("prototype")2020-06-22 17:26:02赞同 展开评论 打赏
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