学习SpringMVC(二十)之返回JSON

首先要加入三个JAR包：

其次在Controller中：

<span style="font-family:SimSun;font-size:18px;">package com.cgf.springmvc.handlers;
import java.util.Collection;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;
import com.cgf.springmvc.crud.dao.EmployeeDao;
import com.cgf.springmvc.crud.entities.Employee;

@RequestMapping(value="/springmvc")
@Controller
public class MyJson {

	@Autowired
	private EmployeeDao employeeDao;

	<span style="color:#ff0000;">@ResponseBody</span>
	@RequestMapping(value="/testJSON")
	public  Collection<Employee> testJson(){
		return employeeDao.getAll();
	}

}</span>

在index.jsp中：

	<script type="text/javascript" src="scripts/jquery-1.9.1.min.js"></script>
	<script type="text/javascript">
	$(function(){
		$("#test_json").click(function(){
			var url=this.href;
			var args={};
			$.post(url,args,function(data){
				for(var i=0;i<data.length;i++){
						var id=data[i].id;
						var lastName=data[i].lastName;
						alert(id+"---"+lastName);
				}
			});
		return false;
		});
	})
	</script>

<h2>SpringMVC JSON</h2>
<a href="springmvc/testJSON" id="test_json">Test Json</a><br>