springmvc返回json

index.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
<script type="text/javascript" src="scripts/jquery-1.9.1.min.js"></script>
<script type="text/javascript">
	$(function(){
		$("#testJson").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>
</head>
<body>
	
	<form action="testFileUpload" method="POST" enctype="multipart/form-data">
		File: <input type="file" name="file"/>
		Desc: <input type="text" name="desc"/>
		<input type="submit" value="Submit"/>
	</form>
	
	<br><br>
	
	
	<a href="testJson" id="testJson">Test Json</a>
	<br><br>
	
	<form action="testHttpMessageConverter" method="POST" enctype="multipart/form-data">
		File: <input type="file" name="file"/>
		Desc: <input type="text" name="desc"/>
		<input type="submit" value="Submit"/>
	</form>
	
	<br><br>
	
	<a href="testResponseEntity">Test ResponseEntity</a>
	
</body>
</html>

Controller

@RequestMapping("/testResponseEntity")
	public ResponseEntity<byte[]> testResponseEntity(HttpSession session) throws IOException{
		byte [] body = null;
		ServletContext servletContext = session.getServletContext();
		InputStream in = servletContext.getResourceAsStream("/files/abc.txt");
		body = new byte[in.available()];
		in.read(body);
		
		HttpHeaders headers = new HttpHeaders();
		headers.add("Content-Disposition", "attachment;filename=abc.txt");
		
		HttpStatus statusCode = HttpStatus.OK;
		
		ResponseEntity<byte[]> response = new ResponseEntity<byte[]>(body, headers, statusCode);
		return response;
	}
	
	@ResponseBody
	@RequestMapping("/testHttpMessageConverter")
	public String testHttpMessageConverter(@RequestBody String body){
		System.out.println(body);
		return "helloworld! " + new Date();
	}
	
	@ResponseBody
	@RequestMapping("/testJson")
	public Collection<Employee> testJson(){
		return employeeDao.getAll();
	}
	
	

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原文地址:https://www.cnblogs.com/xidianzxm/p/12403232.html