使用getParameterMap()方法实现对请求参数的封装的工具类

 1 import java.util.HashMap;
 2 import java.util.Iterator;
 3 import java.util.Map;
 4 import java.util.Map.Entry;
 5 
 6 import javax.servlet.http.HttpServletRequest;
 7 
 8 public class RequestParamsToMap {
 9 　　//返回值类型为Map<String, Object>
10     public static Map<String, Object> getParameterMap(HttpServletRequest request) {
11         Map<String, String[]> properties = request.getParameterMap();//把请求参数封装到Map<String, String[]>中
12         Map<String, Object> returnMap = new HashMap<String, Object>();
13         Iterator<Entry<String, String[]>> iter = properties.entrySet().iterator();
14         String name = "";
15         String value = "";
16         while (iter.hasNext()) {
17             Entry<String, String[]> entry = iter.next();
18             name = entry.getKey();
19             Object valueObj = entry.getValue();
20             if (null == valueObj) {
21                 value = "";
22             } else if (valueObj instanceof String[]) {
23                 String[] values = (String[]) valueObj;
24                 for (int i = 0; i < values.length; i++) { //用于请求参数中有多个相同名称
25                     value = values[i] + ",";
26                 }
27                 value = value.substring(0, value.length() - 1);
28             } else {
29                 value = valueObj.toString();//用于请求参数中请求参数名唯一
30             }
31             returnMap.put(name, value);
32         }
33         return returnMap;
34     }
35     //返回值类型为Map<String, String>
36     public static Map<String, String> getParameterStringMap(HttpServletRequest request) {
37         Map<String, String[]> properties = request.getParameterMap();//把请求参数封装到Map<String, String[]>中
38         Map<String, String> returnMap = new HashMap<String, String>();
39         String name = "";
40         String value = "";
41         for (Map.Entry<String, String[]> entry : properties.entrySet()) {
42             name = entry.getKey();
43             String[] values = entry.getValue();
44             if (null == values) {
45                 value = "";
46             } else if (values.length>1) {
47                 for (int i = 0; i < values.length; i++) { //用于请求参数中有多个相同名称
48                     value = values[i] + ",";
49                 }
50                 value = value.substring(0, value.length() - 1);
51             } else {
52                 value = values[0];//用于请求参数中请求参数名唯一
53             }
54             returnMap.put(name, value);
55             
56         }
57         return returnMap;
58     }
59     
60 }