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Mybatis传入多参数

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1

mybatis

class="cursor-pointer"> 详细描述

class="cursor-pointer"> 错误截图

class="cursor-pointer"> 源码

<!--命名空间-->
<mapper namespace="cn.wzy.springMybatis.dao.UserMapper">
    <!--防止实体类与数据库命名不一致-->
    <resultMap id="userMap" type="User">
        <id column="user_id" property="user_id"/>
        <result column="user_name" property="user_name"/>
        <result column="user_qq" property="user_qq"/>
        <result column="user_type" property="user_type"/>
        <result column="admissiontime" property="admissiontime"/>
        <result column="graduatedfrom" property="graduatedfrom"/>
        <result column="sid" property="sid"/>
        <result column="dailylink" property="dailylink"/>
        <result column="hope" property="hope"/>
        <result column="recommender" property="recommender"/>
        <result column="known" property="known"/>
        <result column="create_at" property="create_at"/>
        <result column="update_at" property="update_at"/>
    </resultMap>
    <select id="selectFromNameOrSid" resultMap="userMap">
        select * from users
        <where>
         <choose>
            <when test="user_name != null and user_name != ''">
                USER_NAME=#{user_name}
            </when>
             <when test="sid != null and sid != ''">
                 SID=#{sid}
             </when>
         </choose>
        </where>
    </select>
</mapper>

package cn.wzy.springMybatis.dao;

import cn.wzy.springMybatis.entity.User;
import java.util.List;

public interface UserMapper {
    List<User> selectFromNameOrSid(String user_name,long sid);
}

package cn.wzy.springMybatis.service;

public interface Service {
    int selectFromNameOrSid(String user_name,long sid);
}





package cn.wzy.springMybatis.service;

import cn.wzy.springMybatis.dao.UserMapper;
import cn.wzy.springMybatis.entity.User;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
import org.apache.ibatis.session.SqlSession;
import org.apache.ibatis.session.SqlSessionFactory;
import java.sql.Timestamp;

import java.util.ArrayList;
import java.util.Date;
import java.util.List;

public class ServiceImpl implements Service {
    ApplicationContext context = new ClassPathXmlApplicationContext("spring/spring-mybatis.xml");
    SqlSessionFactory factory = (SqlSessionFactory) context.getBean("sqlSessionFactory"); 

   //SelectFromNameOrSid
    public int selectFromNameOrSid(String user_name,long sid){
        //获得会话对象
        SqlSession sqlsession = factory.openSession(true);
        try{
            UserMapper userMapper = sqlsession.getMapper(UserMapper.class);
            List<User> list = userMapper.selectFromNameOrSid(user_name,sid);
            for (User User : list) {
                System.out.println(User);
            }
        }
        catch (Exception e) {
            e.printStackTrace();
        }
        finally {
            sqlsession.close();
        }
        return 1;
    }
}

怎么样使得发送的邮件是一个超链接而且不出现我的ip地址

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1

第三方API调用

class="cursor-pointer"> 详细描述

为何在使用springmvc直接创建项目和在使用maven创建项目时文件夹所在位

2

1

SSM

class="cursor-pointer"> 详细描述

class="cursor-pointer"> 错误截图

spring boot 整合 mybatis

1

springboot

class="cursor-pointer"> 详细描述

class="cursor-pointer"> 错误截图

校验要写的多细

1

class="cursor-pointer"> 详细描述

关于MAP传值及遍历

1

mybatis

class="cursor-pointer"> 详细描述

class="cursor-pointer"> 错误截图

class="cursor-pointer"> 源码

    @RequestMapping(value = "sort",method = RequestMethod.POST)
    @ResponseBody
    public Result sortPortfolio(@RequestBody String jsonObject){// List<Integer> portfolioSpares, List<Long> portfolioIds
        JSONObject jsonObject1 = JSONObject.parseObject(jsonObject);
        List<Integer> portfolioSpares = (List<Integer>) jsonObject1.get("portfolioSpares");
        List<Long> portfolioIds = (List<Long>) jsonObject1.get("portfolioIds");
        Result result = wcmi.sortPortfolio(portfolioSpares,portfolioIds);
        return result;
    }
}



    public Result sortPortfolio(@Param("portfolioSpares") List<Integer>  portfolioSpares, @Param("portfolioIds") List<Long> portfolioIds){
        HashMap<Integer,Long> map = new HashMap();
        for(int i=0;i<portfolioSpares.size();i++){
            map.put(portfolioSpares.get(i), portfolioIds.get(i));
        }
        int i = wcm.updateSpareByKey(map);
        if(i==portfolioIds.size()){
            return new Result(0,"设置成功",i);
        }else {
            return new Result(-1,"设置失败",i);
        }
    }
}
 <update id="updateSpareByKey" parameterType="java.util.HashMap">
    <foreach collection="HashMap"  index="key" item="var" separator="union">
      update works_cllection
      set
      portfolio_spare = #{key ,jdbcType=INTEGER}
      where portfolio_id = #{var,jdbcType=BIGINT}

    </foreach>
  </update>

[DEBUG] 2019-05-24 21:18:37,315 method:org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:993)
Could not complete request
org.mybatis.spring.MyBatisSystemException: nested exception is org.apache.ibatis.builder.BuilderException: The expression 'HashMap' evaluated to a null value.
	at org.mybatis.spring.MyBatisExceptionTranslator.translateExceptionIfPossible(MyBatisExceptionTranslator.java:77)
	at org.mybatis.spring.SqlSessionTemplate$SqlSessionInterceptor.invoke(SqlSessionTemplate.java:446)
	at com.sun.proxy.$Proxy19.update(Unknown Source)
	at org.mybatis.spring.SqlSessionTemplate.update(SqlSessionTemplate.java:294)
	at org.apache.ibatis.binding.MapperMethod.execute(MapperMethod.java:62)
	at org.apache.ibatis.binding.MapperProxy.invoke(MapperProxy.java:59)
	at com.sun.proxy.$Proxy25.updateSpareByKey(Unknown Source)
	at com.back.chuilun.service.impl.WorksCllectionServiceImpl.sortPortfolio(WorksCllectionServiceImpl.java:145)
	at com.back.chuilun.controller.WorkCllectionController.sortPortfolio(WorkCllectionController.java:60)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:498)
	at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:205)
	at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:133)
	at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:97)
	at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:827)
	at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:738)
	at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:85)
	at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:967)
	at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:901)
	at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:970)
	at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:872)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:646)
	at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:846)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:727)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:303)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
	at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
	at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:197)
	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:220)
	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:122)
	at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:501)
	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:170)
	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:98)
	at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:950)
	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:116)
	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:408)
	at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1040)
	at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:607)
	at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:313)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
Caused by: org.apache.ibatis.builder.BuilderException: The expression 'HashMap' evaluated to a null value.
	at org.apache.ibatis.scripting.xmltags.ExpressionEvaluator.evaluateIterable(ExpressionEvaluator.java:45)
	at org.apache.ibatis.scripting.xmltags.ForEachSqlNode.apply(ForEachSqlNode.java:55)
	at org.apache.ibatis.scripting.xmltags.MixedSqlNode.apply(MixedSqlNode.java:33)
	at org.apache.ibatis.scripting.xmltags.DynamicSqlSource.getBoundSql(DynamicSqlSource.java:41)
	at org.apache.ibatis.mapping.MappedStatement.getBoundSql(MappedStatement.java:292)
	at org.apache.ibatis.executor.statement.BaseStatementHandler.<init>(BaseStatementHandler.java:64)
	at org.apache.ibatis.executor.statement.PreparedStatementHandler.<init>(PreparedStatementHandler.java:40)
	at org.apache.ibatis.executor.statement.RoutingStatementHandler.<init>(RoutingStatementHandler.java:46)
	at org.apache.ibatis.session.Configuration.newStatementHandler(Configuration.java:545)
	at org.apache.ibatis.executor.SimpleExecutor.doUpdate(SimpleExecutor.java:48)
	at org.apache.ibatis.executor.BaseExecutor.update(BaseExecutor.java:117)
	at org.apache.ibatis.executor.CachingExecutor.update(CachingExecutor.java:76)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:498)
	at org.apache.ibatis.plugin.Plugin.invoke(Plugin.java:63)
	at com.sun.proxy.$Proxy29.update(Unknown Source)
	at org.apache.ibatis.session.defaults.DefaultSqlSession.update(DefaultSqlSession.java:198)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:498)
	at org.mybatis.spring.SqlSessionTemplate$SqlSessionInterceptor.invoke(SqlSessionTemplate.java:433)
	... 47 more
[DEBUG] 2019-05-24 21:18:37,323 method:org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:251)
Returning cached instance of singleton bean 'sqlSessionFactory'

token安全问题

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1

class="cursor-pointer"> 详细描述

rest风格是什么意思？里面有哪些详细规定？该怎么理解？

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1

rest

class="cursor-pointer"> 详细描述

配置了两个service后，如何让web项目随机调用两个service，永不宕机

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1