<s:form action="doUpdateScore.action">
        <s:hidden name="stu_id" value="%{stu_id}" />
        <s:hidden name="course_name" value="%{course_name}" />
        <s:property value="%{stuscore.stu_name}"/>
        <s:textfield label="姓名" value="%{stuscroe.stu_name}" name="stuscore.stu_name"></s:textfield>
        <s:textfield label="分数" value="%{stuscroe.score}" name="stuscore.score"></s:textfield>
        <s:text name="%{stuscroe.stu_name}"/>
        <s:submit value="提交"></s:submit>
    </s:form>

public class UpdateScoresAction extends ActionSupport {
    private ScoresList stuscore;
    public ScoresList getStuscore() {
        return stuscore;
    }
    public void setStuscore(ScoresList stuscore) {
        this.stuscore = stuscore;
    }
    private long stu_id;
    private String course_name;
    public String getCourse_name() {
        return course_name;
    }
    public void setCourse_name(String course_name) {
        //this.course_name = course_name;
        System.out.println("this is set:" +course_name);
        try {
            this.course_name = new String(course_name.getBytes("iso-8859-1"),"GBK");
        } catch (UnsupportedEncodingException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
    }
    private ListScoresService listService;
    public ListScoresService getListService() {
        return listService;
    }
    public void setListService(ListScoresService listService) {
        this.listService = listService;
    }
    public long getStu_id() {
        return stu_id;
    }
    public void setStu_id(long stu_id) {
        this.stu_id = stu_id;
    }
    @Override
    public String execute() throws Exception {
        // TODO Auto-generated method stub
        //根据学号和课程号找到一条记录
        this.stuscore = this.listService.findstudentscorebycoursename(stu_id, course_name);
        System.out.println(stuscore.getCourse_name());
        System.out.println(stuscore.toString());
        return "success";
    }
    public String makeUpdate() throws Exception{
        if(stuscore == null){
            System.out.println("null");
        }
        else{
            System.out.println(stuscore.getCourse_name());
        }
        this.listService.setStudentScores(stuscore);
        return "success";
    }
}