Java后台接口开发初步实战教程

上图是查询列表的接口，get方式

上图是用户注册的接口，同样是get，post方式也很简单

开发工具：intellij idea 2016.3.5

orm框架：mybatis

数据库：mysql

服务器：tomcat7.0

公司使用的的orm框架是hibernate，使用起来感觉比mybatis好用多了，毕竟经过了公司这么多项目的考验，总比自己用mybatis写的项目可靠，但以下分享的还是mybatis的代码

注册接口方法：http://192.168.1.116:8080/register?username=111&password=222

@requestmapping(value = "register", method = requestmethod.get)
 @responsebody
 public map<string, object> register(@requestparam("username") string username, @requestparam("password") string password) {
  out.println("welcome to register,username=" + username + ";password=" + password);
  map<string, object> map = new hashmap<>();
  resultbean result = onregister(username, password);
  out.println("result==>" + result);
  map.put("code", result.getcode());
  map.put("reason", result.getreason());
  map.put("success", result.issuccess());
  return map;
 }

具体的注册方法，获取session基本和hibernate差不多

private resultbean onregister(string username, string password) {
  resultbean resultbean = new resultbean();
  sqlsession session = null;
  try {
   session = sqlsessionfactory.opensession();
   loginmapper loginmapper = session.getmapper(loginmapper.class);
   map<string, object> map = new hashmap<>();
   map.put("name", username);
   map.put("password", password);
   loginbean bean = new loginbean();
   bean.setname(username);
   bean.setpassword(password);
   // 查询用户是否存在
   loginbean userexist = loginmapper.finduserbyname(map);
   if (userexist != null) {
    // 存在后无法注册
    resultbean.setcode("001");
    resultbean.setsuccess(false);
    resultbean.setreason("用户已存在");
   } else {
    loginmapper.adduser(bean);
    session.commit();// 重要，一定要commit，否则无法insert
    system.out.println("当前增加的用户id为：" + bean.getid());
    resultbean.setcode("200");
    resultbean.setsuccess(true);
    resultbean.setreason("注册成功");
   }
  } catch (exception e) {
   e.printstacktrace();
   out.println("注册异常==>" + e.getmessage());
   resultbean.setcode("001");
   resultbean.setsuccess(false);
   resultbean.setreason("注册异常");
  } finally {
   session.close();
  }
  return resultbean;
 }

这个mapper需要在配置文件中指定

public interface loginmapper {
 public loginbean finduserbyname(map<string,object> map) throws exception;
 public void adduser(loginbean bean) throws exception;
}

这是对应的loginmapper.xml

<?xml version="1.0" encoding="utf-8" ?>
<!doctype mapper
  public "-//mybatis.org//dtd mapper 3.0//en"
  "http://mybatis.org/dtd/mybatis-3-config.dtd">
<mapper namespace="com.xm.travel.loginmapper">
 <select id="loadrunlist" parametertype="java.util.map" resulttype="com.xm.travel.runbean">
  select * from run
 </select>
 <select id="loginuser" parametertype="java.util.map" resulttype="com.xm.travel.loginbean">
  select * from user where name = #{name} and password = #{password}
 </select>
 <select id="finduserbyname" parametertype="java.util.map" resulttype="com.xm.travel.loginbean">
  select * from user where name = #{name}
 </select>
 <insert id="adduser" usegeneratedkeys="true" keyproperty="id" >
  insert into user(id,name,password) values(#{id},#{name},#{password})
 </insert>
</mapper>

以上这篇 java后台接口开发初步实战教程就是小编分享给大家的全部内容了，希望能给大家一个参考，也希望大家多多支持。