Spring 中Control示例

    package com.sklll.web.controller;            import java.io.IOException;      import java.io.OutputStream;      import java.util.ArrayList;      import java.util.Date;      import java.util.HashMap;      import java.util.HashSet;      import java.util.List;      import java.util.Map;      import java.util.Set;      import javax.annotation.Resource;      import javax.servlet.http.HttpServletRequest;      import javax.servlet.http.HttpServletResponse;      import org.springframework.core.io.ClassPathResource;      import org.springframework.http.HttpEntity;      import org.springframework.stereotype.Controller;      import org.springframework.util.Assert;      import org.springframework.util.FileCopyUtils;      import org.springframework.web.bind.annotation.CookieValue;      import org.springframework.web.bind.annotation.PathVariable;      import org.springframework.web.bind.annotation.RequestHeader;      import org.springframework.web.bind.annotation.RequestMapping;      import org.springframework.web.bind.annotation.RequestParam;      import org.springframework.web.bind.annotation.ResponseBody;      import com.sklll.core.entity.JsonResult;      import com.sklll.web.dao.TestMapper;      import com.sklll.web.model.Test;      import com.sklll.web.model.User;      import com.sklll.web.service.impl.TestServiceImpl;            /**      * Spring MVC Controller 编写示例      *       * @author shenkunlin     * @since 2016年8月28日 上午9:12:56      **/      @Controller      @RequestMapping(value = "/test")      public class TestController {                /**          * Service 业务层 注入          */          @Resource          private TestServiceImpl testServiceImpl;                /**          * Dao 注入          */          @Resource          private TestMapper testMapper;                /**          * 通过注解绑定 参数值 示例          *           * @PathVariable : 从url 中 取得 参数值          * @RequestHeader : 从请求头中 取得 参数值          * @RequestParam : 从请求参数中 取得 值          * @CookieValue : 从 cookie 中取值          */          @RequestMapping("/**/{id}")          @ResponseBody          public String testValue(@PathVariable("id") String id, @RequestHeader("User-Agent") String userAgent,                  @RequestParam(value = "name", defaultValue = "null", required = false) String name, @CookieValue("JSESSIONID") String jsessionid) {              return userAgent + "<br>" + jsessionid + "<br>" + id + "<br>" + name;          }                /**          * 使用Servlet API对象作为入参          *           * @param request          * @param response          */          @RequestMapping("/request")          public void req(HttpServletRequest request, HttpServletResponse response) {              Assert.notNull(request, "请求不能为空");              response.setStatus(200);          }                /**          * 使用IO对象作为入参          *           * @param os          * @throws IOException          */          @RequestMapping("/stream/{path}")          public void img(OutputStream os, @PathVariable("path") String path) throws IOException {              ClassPathResource res = new ClassPathResource("/spring-mvc.xml");              FileCopyUtils.copy(res.getInputStream(), os);                }                /**          * 表单提交 示例，bean的属性 自动 装配 <br>          * 指定方法类型:method = RequestMethod.POST <br>          * http://localhost/test/rest/test/body?name=starzou&password=123          *           * @param user          * @return          */          @RequestMapping(value = "/body")          @ResponseBody          public Object body(User user) {              return user;          }                /**          * httpEntity.getHeaders() 得到所有请求头          *           * @param httpEntity          * @return          */          @RequestMapping("/http")          @ResponseBody          public Object http(HttpEntity<String> httpEntity) {              return httpEntity.getHeaders().entrySet();          }                /**          * 调用 业务层 方法示例          *           * @return          */          @RequestMapping("/date")          @ResponseBody          public String date() {              return testServiceImpl.date();          }                /**          * Spring MVC将匹配方法参数名URI模板变量名称          *           * @param x          * @param y          * @return          */          @RequestMapping("/var/{x}/{y}")          @ResponseBody          public String var(@PathVariable String x, @PathVariable String y) {              return x + "<br>" + y;          }                /**          * 测试 mybaits generator生成的 dao model，进行 数据库操作          *           * @return          */          @RequestMapping("/tt/add")          @ResponseBody          public Object testAdd() {              com.eduoinfo.finances.bank.web.model.Test test = new com.eduoinfo.finances.bank.web.model.Test();              final long currentTimeMillis = System.currentTimeMillis();              test.setTname("tname : " + currentTimeMillis);              test.setTdate(new Date());              testMapper.insert(test);              return test;          }                /**          * 数据库 查询          *           * @return          */          @RequestMapping("/tt/select")          @ResponseBody          public Object testSelect() {              final List<Test> list = testMapper.selectByExample(null);              return list;          }                /**          * 测试 spring mvc 返回 json , 封装 Json 格式数据, 减少 类型转换          *           * @return          */          @RequestMapping("/json")          @ResponseBody          public JsonResult<Object[]> returnJson() {              // 实际情况 下 String,可能是一个 自定义的Java 类,比如 User , 通常是在 数据库查询              List<String> data = new ArrayList<>();              Set<String> data2 = new HashSet<>();              Map<String, String> data3 = new HashMap<>();                    int i = 0;              while (i < 10) {                  String value = "data-" + (++i);                  data.add(value);                  data2.add(value);                  data3.put(value, value);              }                    // 组装 查询的 结果 , 添加消息 和 是否成功的标识              JsonResult<List<String>> jsonResult = new JsonResult<>(data, "This is a message.", true);              JsonResult<Set<String>> jsonResult2 = new JsonResult<>(data2, "This is a message.", true);              JsonResult<Map<String, String>> jsonResult3 = new JsonResult<>(data3, "This is a message.", true);                    // 复杂一点的 封装              Object[] objs = { jsonResult, jsonResult2, jsonResult3 };              JsonResult<Object[]> jsonObj = new JsonResult<Object[]>(objs);              return jsonObj;          }      }