问题描述
- 从页面表单提交数据时，为啥没有经过类型转换类？求解
- 在进行类型转换测试时发现，在从页面提交参数到后台时，并没有进过我配置的类型转换器，但在将后台类中的属性输出到页面上时，经过了类型转换器。
有没有哪位骚年能指出错在哪里？struts.xml的配置内容
<?xml version=""1.0"" encoding=""UTF-8""?>
<!DOCTYPE struts PUBLIC
-//Apache Software Foundation//DTD Struts Configuration 2.3//EN""
http://struts.apache.org/dtds/struts-2.3.dtd""><action name=""LoginAction"" class=""com.st.action.LoginAction""> <result name=""success"">/result.jsp</result> </action>接受页面传过来的参数的是Customer类
public class Customer
{
private String username;
private String password;
private int age;
public String getUsername() {
System.out.println(""从customer中取值username"");
return username;
}
public void setUsername(String username) {
System.out.println(""往customer中赋值username"");
this.username = username;
}
public String getPassword() {
System.out.println(""从customer中取值password"");
return password;
}
public void setPassword(String password) {
System.out.println(""往customer中赋值password"");
this.password = password;
}
public int getAge() {
System.out.println(""从customer中取值age"");
return age;
}
public void setAge(int age) {
System.out.println(""往customer中赋值age"");
this.age = age;
}}
Action类中存放的是Customer类型的属性
public class LoginAction extends ActionSupport
{
private Customer ct;public Customer getCt()
{
System.out.println(""从Action中取值"");
return ct;
}public void setCt(Customer ct)
{
System.out.println(""给Action中的属性赋值"");
this.ct = ct;
}@Override
public String execute()
{
System.out.println(""execute is invoked"");
return SUCCESS;
}@Override
public void validate() {
System.out.println(""validate is invoked"");
}}
下方是我的类型转换器的代码
public class CustomerConverter extends DefaultTypeConverter
{
@Override
public Object convertValue(Map context Object value Class toType)
{
System.out.println(toType.getName());
if(Customer.class==toType)
{
System.out.println(""外转内"");
String[] str = (String[])value;
String username = str[0];
String password = str[1];
int age = Integer.parseInt(str[2]);
Customer ct = new Customer();
ct.setUsername(username);
ct.setPassword(password);
ct.setAge(age);
return ct;
}
else if(String.class==toType)
{System.out.println(toType.getName());
System.out.println(""内转外"");
Customer ct1 = (Customer)value;
String username = ct1.getUsername();
String password = ct1.getPassword();
String age = String.valueOf(ct1.getAge());
String info = ""username is ""+username+"" password is ""+password+"" age is ""+age;
return info;}
return null;
}
}properties文件也有配置就放在action的包中
ct=com.st.converter.CustomerConverter
提交表单后，页面输出ognl.NoConversionPossible
解决方案
此问题已解决，是由于jsp页面中input标签里的name属性值写错造成的。name的属性值要和action中的属性变量名要一样。