@RequestMapping 和@ResponseBody 和 @RequestBody和@PathVariable 注解注解用法

接下来讲解一下 @RequestMapping 和@ResponseBody 和 @RequestBody和@PathVariable 注解注解用法

@RequestMapping 为url映射路径

@ResponseBody 将数据以json数据返回ajax的回掉方法

@RequestBody 将url的参数以实体形式传入action

@PathVariable 注解分解resultful的风格

jsp源码

<%@ 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>
</head>
<script type="text/javascript" src="js/jquery-1.5.js"></script>
<script type="text/javascript">

2 action源码

package com.atguigu.mybatis.controller;

import java.io.IOException;
import java.util.List;

import org.codehaus.jackson.JsonGenerationException;
import org.codehaus.jackson.map.JsonMappingException;
import org.codehaus.jackson.map.ObjectMapper;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.ResponseBody;

import com.atguigu.mybatis.bean.Employee;
import com.atguigu.mybatis.service.EmployeeService;

@Controller
public class EmployeeController {

@Autowired
EmployeeService employeeService;

@RequestMapping("/getemps")
@ResponseBody
public String empsList() throws JsonGenerationException, JsonMappingException, IOException{
List<Employee> emps = employeeService.getEmps();
ObjectMapper mapper= new ObjectMapper();
String jsonStr = mapper.writeValueAsString(emps );
return jsonStr;
}
@RequestMapping("/getemps1")
@ResponseBody
public Employee emps(@RequestBody Employee e) throws JsonGenerationException, JsonMappingException, IOException{
Employee e1=employeeService.getEmpById(e.getId());
return e1;
}

@RequestMapping("/getemps2")
@ResponseBody
public String empsListbyemail(@RequestBody Employee e) throws JsonGenerationException, JsonMappingException, IOException{
List<Employee> emps = employeeService.getEmpByemail(e.getEmail());
ObjectMapper mapper= new ObjectMapper();
String jsonStr = mapper.writeValueAsString(emps );
return jsonStr;
}

@RequestMapping("/getemps3")
@ResponseBody
public Employee emps(@RequestParam(value = "id") Integer id) throws JsonGenerationException, JsonMappingException, IOException{
Employee e1=employeeService.getEmpById(id);
return e1;
}
@RequestMapping("/testPathVariable/{id}")
@ResponseBody
public Employee testPathVariableemps(@PathVariable("id") Integer id) throws JsonGenerationException, JsonMappingException, IOException{
Employee e1=employeeService.getEmpById(id);
return e1;
}
}

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原文地址：https://www.cnblogs.com/zhangzhiqin/p/8491428.html

@RequestMapping 和@ResponseBody 和 @RequestBody和@PathVariable 注解 注解用法

@RequestMapping 和@ResponseBody 和 @RequestBody和@PathVariable 注解注解用法