• struts2-剩余2


    周一-周四   晚上:7:30 – 9:30

    多线程、Linux、云服务器、git

    spring

    springboot、springcloud

    今晚:7:30  测试直播网速

    一、回顾

    拦截器:在目标action方法执行的前后插入一段额外的逻辑代码;aop面向切面编程的一种实现

    实现Interceptor接口,intercept()核心方法,每次调用目标方法时都会被执行

    struts.xml配置:

             package:<interceptors>

             action:<interceptor-ref name/>

             package默认继承struts-defalut

    i18n

    二、log4j

    以前我们的代码有bug,使用system.out.println()语句来输出打印

    有时我们需要对我们自己的代码运行结果进行记录,可以使用log4j

    log4j是Apache的一个开源项目,可以控制日志信息输出的位置(控制台,文件,数据库)

    日志七个级别

      由低到高分别是:OFF ,DEBUG,INFO,WARN,ERROR,FETAL,ALL

    官方建议使用红色

    使用,

      添加log4j的jar包,然后再src目录配置log4j.properties

    <dependency>
                <groupId>log4j</groupId>
                <artifactId>log4j</artifactId>
                <version>1.2.17</version>
            </dependency>
    # 设置 日志级别和appender
    log4j.rootLogger = info,stdout,logFile
     
    # 输出信息到控制抬 
    log4j.appender.stdout = org.apache.log4j.ConsoleAppender
    log4j.appender.stdout.Target = System.out
    log4j.appender.stdout.layout = org.apache.log4j.PatternLayout
    log4j.appender.stdout.layout.ConversionPattern = [%-5p] %d{yyyy-MM-dd HH:mm:ss,SSS} method:%l%n%m%n
     
    # 输出dubug级别以上的日志到文件
    log4j.appender.logFile = org.apache.log4j.DailyRollingFileAppender
    log4j.appender.logFile.File = E://logs/log.log
    log4j.appender.logFile.Append = true
    log4j.appender.logFile.Threshold = DEBUG 
    log4j.appender.logFile.layout = org.apache.log4j.PatternLayout
    log4j.appender.logFile.layout.ConversionPattern = %-d{yyyy-MM-dd HH:mm:ss}  [ %t:%r ] - [ %p ]  %m%n
    public class Demo1Action extends ActionSupport {
        
        private String name;
        //日志记录器
        private Logger log = Logger.getLogger(Demo1Action.class);
        
        @Override
        public String execute() throws Exception {
            
            log.debug("dubug......");
            log.info("info......");
            log.warn("warn......");
            log.error("error......");
            
            return SUCCESS;
        }
        
    }

    三、ajax访问action

    (1)demo2.jsp

    (2)Demo2Action

    @Getter
    @Setter
    public class Demo2Action extends ActionSupport {
    
        private String uname;
        private String pname;
        //此方法通过前端ajax调用,所以不需要返回值,返回的数据通过response响应
        public void m1() throws IOException{
            System.out.println("姓名:"+uname+",密码:"+pname);
            //获取response响应对象
            HttpServletResponse response = ServletActionContext.getResponse();
            //设置类型和编码
            response.setContentType("text/html");
            response.setCharacterEncoding("utf-8");
            if("admin".equals(uname) && "123456".equals(pname)){
                response.getWriter().write("1"); //成功
            }else{
                response.getWriter().write("0"); //失败
            }
        }
    }

    (3)struts.xml

    <action name="demo2Action" class="com.yujun.maven.action.Demo2Action">
    </action>

    四、highcharts图表-折线图

    (1)City

    @Setter
    @Getter
    public class City {
        private String name; //城市名
        private double[] data; //12月份的温度数组
    }

    (2)Demo3Action

    public class Demo3Action extends ActionSupport {
    
        public void m1() throws Exception {
            
            //模拟数据库,创建数据
            City cq = new City();
            cq.setName("重庆");
            cq.setData(new double[]{7.0, 6.9, 9.5, 14.5, 18.2, 21.5, 25.2,26.5, 23.3, 18.3, 13.9, 9.6});
            
            City lz = new City();
            lz.setName("兰州");
            lz.setData(new double[]{-0.2, 0.8, 5.7, 11.3, 17.0, 22.0, 24.8,24.1, 20.1, 14.1, 8.6, 2.5});
            
            //集合
            List<City> list = new ArrayList<City>();
            list.add(cq);
            list.add(lz);
            
            //把集合转为json数据
            ObjectMapper map = new ObjectMapper();
            String json = map.writeValueAsString(list);
            
            //把json响应到前端
            HttpServletResponse response = ServletActionContext.getResponse();
            response.setContentType("application/json");
            response.setCharacterEncoding("utf-8");
            response.getWriter().write(json);
        }
    }

    (3)struts.xml

    <action name="demo3Action" class="com.yujun.maven.action.Demo3Action">
    </action>

    (4)demo3.jsp

    <script type="text/javascript" src="js/jquery-3.2.1.min.js"></script>
    <script type="text/javascript" src="js/highcharts.js"></script>
    <script type="text/javascript">
        $(document).ready(function() {
           var title = {
              text: '城市平均气温'   
           };
           var subtitle = {
              text: 'Source: runoob.com'
           };
           var xAxis = {
              categories: ['一', '二', '三', '四', '五', '六',
                 '七', '八', '九', '十', '十一', '十二']
           };
           var yAxis = {
              title: {
                 text: 'Temperature (xB0C)'
              },
              plotLines: [{
                 value: 0,
                  1,
                 color: '#808080'
              }]
           };   
    
           var tooltip = {
              valueSuffix: 'xB0C'
           }
    
           var legend = {
              layout: 'vertical',
              align: 'right',
              verticalAlign: 'middle',
              borderWidth: 0
           };
    
           var series;
           
           //ajax请求后台action获取json数据
           $.ajax({
               async:false,
               dataType:'json',
               type:'get',
               url:'demo3Action!m1.action',
               success:function(data){
                   series = data;
               }
           })    
    
           var json = {};
    
           json.title = title;
           json.subtitle = subtitle;
           json.xAxis = xAxis;
           json.yAxis = yAxis;
           json.tooltip = tooltip;
           json.legend = legend;
           json.series = series;
    
           $('#container').highcharts(json);
        });
    </script>
    </head>
    <body>
        <div id="container" style=" 550px; height: 400px; margin: 0 auto"></div>
    </body>
    </html>

    Jackson依赖

    <dependency>
                <groupId>com.fasterxml.jackson.core</groupId>
                <artifactId>jackson-databind</artifactId>
                <version>2.9.8</version>
            </dependency>

    更多图表案例,请自行参照菜鸟教程

    三件事:

             (1)19:30直播平台测试

             (2)单表使用struts2框架增删改查(可以没有分页和查询条件)

             (3)预习hibernate第一章

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  • 原文地址:https://www.cnblogs.com/faded8679/p/10764764.html
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