关于json前后台传值

落日映苍穹つ 2022-08-27 07:52 172阅读 0赞

原创于我的网易博客,地址  [http://yannanying.blog.163.com/blog/static/2211131172014410115730322/][http_yannanying.blog.163.com_blog_static_2211131172014410115730322]

后台.java

HttpServletResponse response = ServletActionContext.getResponse();
    
    	public void checkUserIdCard() throws Exception {
           
    		System.out.println("idCard="+user.getIdCard());
    		JSONObject jobj = new JSONObject();
    		boolean flag = this.userService.findByUserIdCard(user.getIdCard());
    		System.out.println(flag);
    		jobj.put("success", flag);
    		System.out.println("返回前台的flag==="+flag+"------true表示可以使用，false表示数据库已存在此用户名");
    		ResponseUtil.write(response, jobj);

工具类ResponseUtil.java

/**
     * 
     */
    package com.rcpy.util;
    
    import java.io.IOException;
    import java.io.PrintWriter;
    
    import javax.servlet.http.HttpServletResponse;
    
    /**
     * @author phn
     *
     */
    public class ResponseUtil {
           
    	public static void write(HttpServletResponse response,Object obj) throws IOException{
           
    		response.setContentType("text/html;charset=utf-8");
    		PrintWriter out = response.getWriter();
    		out.print(obj.toString());
    		out.flush();
    		out.close();
    	}
    
    }

struts.xml

前台.js

使用json必须的6个jar包

**1.commons-beanutils-1.7.0.jar  
  
2.commons-collections-3.2.1.jar  
  
3.commons-lang-2.3.jar  
  
4.commons-logging-1.0.4.jar  
  
5.ezmorph-1.0.3.jar  
  
6.json-lib-2.1.jar**

[http_yannanying.blog.163.com_blog_static_2211131172014410115730322]: http://yannanying.blog.163.com/blog/static/2211131172014410115730322/