Question

java后台怎么接收并解析前台传过来的json

Answer 1

package cn.iambestcoder.servlet;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.ArrayList;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import cn.iambestcoder.bean.Student;
import cn.iambestcoder.mysql.ConnectMySql;
@WebServlet( name = "Score",urlPatterns = "/Score")
public class Score extends HttpServlet
{
	private ArrayList<Student> list = new ArrayList<>();
	private String ids[] = null;//学号
	private String kinds[] = null;//考试种类
	private String scores[] =null;//分数
	
	public void doPost(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException
	{
		request.setCharacterEncoding("utf-8");
		response.setCharacterEncoding("utf-8");
		response.setContentType("text/html");
		
		ids = request.getParameterValues("id");
		kinds = request.getParameterValues("kind");
		scores = request.getParameterValues("score");
	
		for(int i=0;i<scores.length;i++)
		{
			Student student = new Student(ids[i],null,kinds[i],new Integer(scores[i]));
			list.add(student);
		}
		
		int code = new ConnectMySql().updateScore(list);
		
		if(code == 0)//修改失败
		{
			PrintWriter writer = response.getWriter();
			writer.write("Sorry");
			writer.flush();writer.close();
		}
		else//修改成功
		{
			response.sendRedirect("index.jsp");
		}
	}
}