org.springframework.beans.notwritable PropertyException:无效属性

Question

嗨，我是春季的新手，现在我正在使用maven

运行我的应用程序

但是当我运行项目时，我会得到以下的例外

'bean class [com.ensis.spring.movielister]的'年：bean属性'年'不是写作或具有无效的设置器方法。设置器的参数类型是否匹配getter的返回类型？

主：

public class Main {
    public static void main(String[] args){
        ApplicationContext ctx=new ClassPathXmlApplicationContext("applicationContext.xml");
        MovieLister movieLister = (MovieLister)ctx.getBean("lister");
        movieLister.printMoviesByYear();
    }
}

电影：

private int year;
    private String name;
    public Movie(int year, String name) {
        super();
        this.year = year;
        this.name = name;
    }
    public int getYear() {
        return year;
    }
    public void setYear(int year) {
        this.year = year;
    }
    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }

Moviefinder：

public class MovieFinder {
    private static List<Movie>moviesList;
    static{
        moviesList.add(new Movie(1990, "A"));
        moviesList.add(new Movie(1991, "B"));
        moviesList.add(new Movie(1992, "C"));
        moviesList.add(new Movie(1993, "D"));
        moviesList.add(new Movie(1994, "E"));
        moviesList.add(new Movie(1995, "F"));
    }
    public List<Movie>findMoviesByYear(int year){
        List<Movie>findMovies=new ArrayList<Movie>();
        for(Movie movie:moviesList){
            if(year==movie.getYear()){
                findMovies.add(movie);          
                }
        }
        return findMovies;
    }
}

movielister：

public class MovieLister {
    private int year;
    private MovieFinder movieFinder;

    public void printMoviesByYear(){
        List<Movie>found = movieFinder.findMoviesByYear(year);
        for(Movie movie:found){
            System.out.println("So movies are======>"+movie.getName());
        }
    }
}

ApplicationContext.xml

<?xml version = "1.0" encoding = "UTF-8"?>
<beans xmlns = "http://www.springframework.org/schema/beans"
   xmlns:xsi = "http://www.w3.org/2001/XMLSchema-instance"
   xsi:schemaLocation = "http://www.springframework.org/schema/beans
   http://www.springframework.org/schema/beans/spring-beans-3.0.xsd">
   <bean id="lister" class ="com.ensis.spring.MovieLister" autowire="byType">
   <property name="year" value="1991"/>
   </bean>
   <bean id="finder" class="com.ensis.spring.MovieFinder"/>
   </beans>

Answer 1

将一个设置器添加到Movielister：

public void setYear(final int year) {
  this.year = year;
}

这是必需的，因为会员变量年度是私人的。

旁注：如果Movielister实例需要一年或任何其他成员变量，我强烈建议创建一个设置这些变量的构造函数。