調用Action后，Action不返回任何頁面，只返回一串字符串

方法一：

Action.java中的代碼如下。struts.xml中配置不變

public String execute() throws Exception {  
//注意：加上這句就必須設置響應的編碼格式，否則會出現亂碼  
        HttpServletResponse response = ServletActionContext.getResponse();  
        response.setContentType("text/html;charset=UTF-8");  
        PrintWriter out = response.getWriter();  
  
        String dbusername = "Charles";  
        if (username.equals(dbusername)) {  
             out.println("seccess");//返回的字符串數據  
            return null;  
        }  
        return null;  
    } 

方法二：

javaAction代碼：

public class TextStringAction extends ActionSupport{  
    // input屬性  
    private String username;  
    private String password;  
    // output屬性  
    private InputStream inputStream; //這個名字和struts.xml中對應，不能寫錯  
  
    public InputStream getInputStream() {  
        return inputStream;  
    }  
  
    public void setInputStream(InputStream inputStream) {  
        this.inputStream = inputStream;  
    }  
  
    public String execute() throws Exception {  
        String dbusername = "Charles";  
        if (username.equals(dbusername)) {  
            inputStream = new ByteArrayInputStream("我\\是\\好人"  
                    .getBytes("UTF-8"));  
            return "success";  
        }  
        return null;  
    }  
        // ------------省略getter/setter---------  
   } 

Struts.xml

<action name="testString" class="com.xxx.xxx.xxxx" method="xxx">  
        <result type="stream">  
            <param name="contentType">text/html</param>  
            <param name="inputName">inputStream</param>  
        </result>  
    </action>  

效果

Paste_Image.png