Spring中ModelAndView源码

本文主要是介绍Spring中ModelAndView源码，希望对大家解决编程问题提供一定的参考价值，需要的开发者们随着小编来一起学习吧！

Spring中ModelAndView源码



package org.springframework.web.servlet;

import java.util.Map;
import org.springframework.ui.ModelMap;
import org.springframework.util.CollectionUtils;
import org.springframework.web.servlet.View;

public class ModelAndView {private Object view;
    private ModelMap model;
    private boolean cleared = false;

    public ModelAndView() {}public ModelAndView(String viewName) {this.view = viewName;
    }public ModelAndView(View view) {this.view = view;
    }public ModelAndView(String viewName, Map<String, ?> model) {this.view = viewName;
        if(model != null) {this.getModelMap().addAllAttributes(model);
        }}public ModelAndView(View view, Map<String, ?> model) {this.view = view;
        if(model != null) {this.getModelMap().addAllAttributes(model);
        }}public ModelAndView(String viewName, String modelName, Object modelObject) {this.view = viewName;
        this.addObject(modelName, modelObject);
    }public ModelAndView(View view, String modelName, Object modelObject) {this.view = view;
        this.addObject(modelName, modelObject);
    }public void setViewName(String viewName) {this.view = viewName;
    }public String getViewName() {return this.view instanceof String?(String)this.view:null;
    }public void setView(View view) {this.view = view;
    }public View getView() {return this.view instanceof View?(View)this.view:null;
    }public boolean hasView() {return this.view != null;
    }public boolean isReference() {return this.view instanceof String;
    }protected Map<String, Object> getModelInternal() {return this.model;
    }public ModelMap getModelMap() {if(this.model == null) {this.model = new ModelMap();
        }return this.model;
    }public Map<String, Object> getModel() {return this.getModelMap();
    }public ModelAndView addObject(String attributeName, Object attributeValue) {this.getModelMap().addAttribute(attributeName, attributeValue);
        return this;
    }public ModelAndView addObject(Object attributeValue) {this.getModelMap().addAttribute(attributeValue);
        return this;
    }public ModelAndView addAllObjects(Map<String, ?> modelMap) {this.getModelMap().addAllAttributes(modelMap);
        return this;
    }public void clear() {this.view = null;
        this.model = null;
        this.cleared = true;
    }public boolean isEmpty() {return this.view == null && CollectionUtils.isEmpty(this.model);
    }public boolean wasCleared() {return this.cleared && this.isEmpty();
    }public String toString() {StringBuilder sb = new StringBuilder("ModelAndView: ");
        if(this.isReference()) {sb.append("reference to view with name \'").append(this.view).append("\'");
        } else {sb.append("materialized View is [").append(this.view).append(']');
        }sb.append("; model is ").append(this.model);
        return sb.toString();
    }
}