trim

gic-enterprise-common/src/main/java/com/gic/enterprise/filter/FilterConfig.java

@@ -13,4 +13,12 @@ public class FilterConfig {
         bean.addUrlPatterns("/*");
         return bean;
     }
+    @Bean
+
+    public FilterRegistrationBean filterRegistrationBean2(){
+        FilterRegistrationBean bean = new FilterRegistrationBean();
+        bean.setFilter(new StringFilter());
+        bean.addUrlPatterns("/*");
+        return bean;
+    }
 }

gic-enterprise-common/src/main/java/com/gic/enterprise/filter/StringFilter.java

+package com.gic.enterprise.filter;
+
+import com.gic.enterprise.request.ParameterRequestWrapper;
+import org.springframework.web.filter.OncePerRequestFilter;
+
+import javax.servlet.FilterChain;
+import javax.servlet.ServletException;
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
+import java.io.IOException;
+
+/**
+ * @author zhiwj
+ * @Description:
+ * @date 2020-05-12 16:49
+ */
+public class StringFilter extends OncePerRequestFilter {
+
+
+    @Override
+    protected void doFilterInternal(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, FilterChain filterChain) throws ServletException, IOException {
+        ParameterRequestWrapper requestWrapper = new ParameterRequestWrapper(httpServletRequest);
+        filterChain.doFilter(requestWrapper, httpServletResponse);
+    }
+}

gic-enterprise-common/src/main/java/com/gic/enterprise/request/ParameterRequestWrapper.java

+package com.gic.enterprise.request;
+
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletRequestWrapper;
+import java.util.HashMap;
+import java.util.Iterator;
+import java.util.Map;
+import java.util.Set;
+
+/**
+ * @author zhiwj
+ * @Description:
+ * @date 2020-05-12 16:39
+ */
+public class ParameterRequestWrapper extends HttpServletRequestWrapper {
+
+    private Map<String , String[]> params = new HashMap<>();
+
+    @SuppressWarnings("unchecked")
+    public ParameterRequestWrapper(HttpServletRequest request) {
+        // 将request交给父类，以便于调用对应方法的时候，将其输出，其实父亲类的实现方式和第一种new的方式类似
+        super(request);
+        //将参数表，赋予给当前的Map以便于持有request中的参数
+        this.params.putAll(request.getParameterMap());
+        this.modifyParameterValues();
+    }
+    //重载一个构造方法
+    public ParameterRequestWrapper(HttpServletRequest request , Map<String , Object> extendParams) {
+        this(request);
+        addAllParameters(extendParams);//这里将扩展参数写入参数表
+    }
+
+    public void modifyParameterValues(){//将parameter的值去除空格后重写回去
+        Set<String> set =params.keySet();
+        Iterator<String> it=set.iterator();
+        while(it.hasNext()){
+            String key= it.next();
+            String[] values = params.get(key);
+            values[0] = values[0].trim();
+            params.put(key, values);
+        }
+    }
+
+    @Override
+    public String getParameter(String name) {//重写getParameter，代表参数从当前类中的map获取
+        String[]values = params.get(name);
+        if(values == null || values.length == 0) {
+            return null;
+        }
+        return values[0];
+    }
+
+    @Override
+    public String[] getParameterValues(String name) {//同上
+        return params.get(name);
+    }
+
+    public void addAllParameters(Map<String , Object>otherParams) {//增加多个参数
+        for(Map.Entry<String , Object>entry : otherParams.entrySet()) {
+            addParameter(entry.getKey() , entry.getValue());
+        }
+    }
+
+    public void addParameter(String name , Object value) {//增加参数
+        if(value != null) {
+            if(value instanceof String[]) {
+                params.put(name , (String[])value);
+            }else if(value instanceof String) {
+                params.put(name , new String[] {(String)value});
+            }else {
+                params.put(name , new String[] {String.valueOf(value)});
+            }
+        }
+    }
+}
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