Question

java对象怎么转成json数组 传到前台页面

Answer 1

你会js吗，你就用Java生成一个js数组发到前台啊，或者使用js框架，eg:dwr,jquery ，reurn 一个json格式的页面 也可以。
JSONArray ja = JSONArray.fromObject(list);
out.print(ja.toString());

Answer 2

String name=request.getParameter("name");
response.setContentType("text/html;charset=UTF-8");
PrintWriter out = response.getWriter();
try {
List list=dizhiservice.getbyname(name);
StringBuffer sb = new StringBuffer();
sb.append("[");
for (int i = 0; i < list.size(); i++) {
Object[] obj = (Object[])list.get(i);
sb.append("{");
sb.append("\"" + "id" + ":"+"\"" + obj[0] +"\""+",");

sb.append("\"" + "name" + ":"+"\"" + obj[1] +"\""+",");

sb.append("\"" + "phone" + ":"+"\"" + obj[2] +"\""+",");

sb.append("\"" + "adrress" + ":"+"\"" + obj[3] +"\""+",");

sb.append("}");
if(i!=list.size()-1)
sb.append(",");

}
sb.append("]");
out.println(sb.toString());
System.out.println(sb.toString());