[JAVA]用Java实现的各种排序

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0 发表于: 2007-03-15

用Java语言实现的各种排序，包括插入排序、冒泡排序、选择排序、Shell排序、快速排序、归并排序、堆排序、SortUtil等。
插入排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;
/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class InsertSort implements SortUtil.Sort{

/* (non-Javadoc)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
int temp;
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1);
}
}
}

}

冒泡排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;

/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class BubbleSort implements SortUtil.Sort{

/* (non-Javadoc)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
int temp;
for(int i=0;i for(int j=data.length-1;j>i;j--){
if(data[j] SortUtil.swap(data,j,j-1);
}
}
}
}

}

选择排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;

/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class SelectionSort implements SortUtil.Sort {

/*
* (non-Javadoc)
*
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
int temp;
for (int i = 0; i < data.length; i++) {
int lowIndex = i;
for (int j = data.length - 1; j > i; j--) {
if (data[j] < data[lowIndex]) {
lowIndex = j;
}
}
SortUtil.swap(data,i,lowIndex);
}
}

}

Shell排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;

/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class ShellSort implements SortUtil.Sort{

/* (non-Javadoc)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
for(int i=data.length/2;i>2;i/=2){
for(int j=0;j insertSort(data,j,i);
}
}
insertSort(data,0,1);
}

/**
* @param data
* @param j
* @param i
*/
private void insertSort(int[] data, int start, int inc) {
int temp;
for(int i=start+inc;i for(int j=i;(j>=inc)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-inc);
}
}
}

}

快速排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;

/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class QuickSort implements SortUtil.Sort{

/* (non-Javadoc)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
quickSort(data,0,data.length-1);
}
private void quickSort(int[] data,int i,int j){
int pivotIndex=(i+j)/2;
file://swap
SortUtil.swap(data,pivotIndex,j);

int k=partition(data,i-1,j,data[j]);
SortUtil.swap(data,k,j);
if((k-i)>1) quickSort(data,i,k-1);
if((j-k)>1) quickSort(data,k+1,j);

}
/**
* @param data
* @param i
* @param j
* @return
*/
private int partition(int[] data, int l, int r,int pivot) {
do{
while(data[++l] while((r!=0)%26amp;%26amp;data[--r]>pivot);
SortUtil.swap(data,l,r);
}
while(l SortUtil.swap(data,l,r);
return l;
}

}

改进后的快速排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;

/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class ImprovedQuickSort implements SortUtil.Sort {

private static int MAX_STACK_SIZE=4096;
private static int THRESHOLD=10;
/* (non-Javadoc)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
int[] stack=new int[MAX_STACK_SIZE];

int top=-1;
int pivot;
int pivotIndex,l,r;

stack[++top]=0;
stack[++top]=data.length-1;

while(top>0){
int j=stack[top--];
int i=stack[top--];

pivotIndex=(i+j)/2;
pivot=data[pivotIndex];

SortUtil.swap(data,pivotIndex,j);

file://partition
l=i-1;
r=j;
do{
while(data[++l] while((r!=0)%26amp;%26amp;(data[--r]>pivot));
SortUtil.swap(data,l,r);
}
while(l SortUtil.swap(data,l,r);
SortUtil.swap(data,l,j);

if((l-i)>THRESHOLD){
stack[++top]=i;
stack[++top]=l-1;
}
if((j-l)>THRESHOLD){
stack[++top]=l+1;
stack[++top]=j;
}

}
file://new InsertSort().sort(data);
insertSort(data);
}
/**
* @param data
*/
private void insertSort(int[] data) {
int temp;
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1);
}
}
}

}

归并排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;

/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class MergeSort implements SortUtil.Sort{

/* (non-Javadoc)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
int[] temp=new int[data.length];
mergeSort(data,temp,0,data.length-1);
}

private void mergeSort(int[] data,int[] temp,int l,int r){
int mid=(l+r)/2;
if(l==r) return ;
mergeSort(data,temp,l,mid);
mergeSort(data,temp,mid+1,r);
for(int i=l;i<=r;i++){
temp=data; R&BTA
} NP/Gn6fr
int i1=l; 2h1vVF3
int i2=mid+1; O%5 r[
for(int cur=l;cur<=r;cur++){ 'DL`Ee\
if(i1==mid+1) V#S9H!hm$
data[cur]=temp[i2++]; hUp.tK:X7o
else if(i2>r) pw)||Q
data[cur]=temp[i1++]; 6&!PmKFO.
else if(temp[i1] data[cur]=temp[i1++]; *&^:T~|=!
else <4g{ fT0
data[cur]=temp[i2++]; sE Q=dcK
} ZOeQ+j)|I
} =pS5uR~
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} 4;0lvDD
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改进后的归并排序: uP~@U"!
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package org.rut.util.algorithm.support; $+Z)
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import org.rut.util.algorithm.SortUtil; %)/P^9I6
Tk:h@F|B.|
/** XH}\15X
* @author treeroot j/f?"VEr
* @since 2006-2-2 !`,Sfqij
* @version 1.0 Rld!,t
*/ hog=ut
public class ImprovedMergeSort implements SortUtil.Sort { w1OI4C)~
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private static final int THRESHOLD = 10; CsoiyY -2
w~"KA6^
/* >aj7||K
* (non-Javadoc) MbZJ;,e?
* pgE}NlW
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) $m].8?
*/ Q;43[1&3w
public void sort(int[] data) { 7BK0}sxO
int[] temp=new int[data.length]; x7jC)M<k0
mergeSort(data,temp,0,data.length-1); p~BRh
} V C24sU
^=RffrlZU
private void mergeSort(int[] data, int[] temp, int l, int r) { ?fUlgQ}N
int i, j, k; WJkZ!O$"j
int mid = (l + r) / 2; QxVq^H
if (l == r) <SgM@0m
return; |:xYE{*)H
if ((mid - l) >= THRESHOLD) \n8]M\<
mergeSort(data, temp, l, mid); t<z`N-5*
else Mn2QZp4
insertSort(data, l, mid - l + 1); El[)?+;D
if ((r - mid) > THRESHOLD) XWS%zLaK
mergeSort(data, temp, mid + 1, r); bF"G[pD
else m'6&9Jak
insertSort(data, mid + 1, r - mid); snf~}:&
7=TF.TW)
for (i = l; i <= mid; i++) { i|w81p^o
temp = data; f]`#J%P
} 4'g;TI^
for (j = 1; j <= r - mid; j++) { b&~4t/Vq
temp[r - j + 1] = data[j + mid]; z(_Ss@ $
} ur$ _
int a = temp[l]; K1r#8Q!t
int b = temp[r]; E:JJ3X|
for (i = l, j = r, k = l; k <= r; k++) { K?B{rE Lp
if (a < b) { RrX[|GLSJ
data[k] = temp[i++]; -@yh>8v
a = temp; j9?}j#@
} else { 6r"eN%m
data[k] = temp[j--]; wQP^WzNE
b = temp[j]; DcoX+8 7
} -xSA
} )uj Ex7&c
} Hfwq/Is
>}`:Ac
/** bJRN;g
* @param data lef2X1w}!
* @param l s \;"X
* @param i =XucOli6
*/ DoJ\ q+
private void insertSort(int[] data, int start, int len) { l6YtEHNG
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); !UG 7Uer
} x }\64
} P `}zlml
} ^?cz,N~
} `x l
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堆排序： ?t/~lv
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package org.rut.util.algorithm.support; pm*xb]8y
K/tRe/t}
import org.rut.util.algorithm.SortUtil; o<<xY<
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/** %_+2@\
* @author treeroot 0fb`08,^
* @since 2006-2-2 "uuVy$6C
* @version 1.0 C\/xl#e<@
*/ r"``QmM
public class HeapSort implements SortUtil.Sort{ |uqf:V`z:
9K5pwC\$%
/* (non-Javadoc) 0Sle
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) r\b3AKrIN
*/ :*ing
public void sort(int[] data) { <KE 1f7c
MaxHeap h=new MaxHeap(); xIxn"^'
h.init(data); 9:ze{ c $
for(int i=0;i h.remove(); :rHJ4Tl
System.arraycopy(h.queue,1,data,0,data.length); {Or;
} wF <n=
RIb4!!',c
private static class MaxHeap{ OK{quM5
/4a._@1h[y
void init(int[] data){ k5D%y3|9
this.queue=new int[data.length+1]; q#vQv5
for(int i=0;i queue[++size]=data; ;pqg/>W'
fixUp(size); Xe<sJ.&Wf
} lzYEx
} 4US"hexE<
IPgt|if^
private int size=0; P%{^i]
y.WEj?EL
private int[] queue; V,q](bg
jDy-)2<
public int get() { JHz [7
return queue[1]; Po ZuMF
} B$b +Ymu
|K.mP4CKY
public void remove() { #9X70|f
SortUtil.swap(queue,1,size--); 9[G[$c
fixDown(1); H *[_cqnv
} J3n-`k8
file://fixdown clNkph
private void fixDown(int k) { {B[=?6tQ
int j; ^r*r w=
while ((j = k << 1) <= size) { &;+-?k|
if (j < size %26amp;%26amp; queue[j] j++; /lo2y?CS*
if (queue[k]>queue[j]) file://不用交换 4:|S` jm
break; vH#huZA?7
SortUtil.swap(queue,j,k); LG<J;&41~S
k = j; _(h&7P9
} Wn(6,MDUN
} Zy o[(`y
private void fixUp(int k) { $u9K+>.
while (k > 1) { b]x4o#t
int j = k >> 1; MrDc$p W G
if (queue[j]>queue[k]) /4g1zrU
break; +tVaBhd!
SortUtil.swap(queue,j,k); c )G3k/T5
k = j; 5<UVD:~z
} dR"@`
} +xrr?g
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} 1UE6 4Kl:S
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} 4"(<X
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SortUtil： nPye,"A Ol
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package org.rut.util.algorithm; YhDtUt}?
8DegN,?
import org.rut.util.algorithm.support.BubbleSort; W3 'q\+
import org.rut.util.algorithm.support.HeapSort; CE/Xfh'44
import org.rut.util.algorithm.support.ImprovedMergeSort; LN@F+CyDc
import org.rut.util.algorithm.support.ImprovedQuickSort; 1IZ3=6
import org.rut.util.algorithm.support.InsertSort; mGJasn
import org.rut.util.algorithm.support.MergeSort; \3pc"^W
import org.rut.util.algorithm.support.QuickSort; y#q?A,C@n
import org.rut.util.algorithm.support.SelectionSort; T~Gvp0r}h
import org.rut.util.algorithm.support.ShellSort; }Q=!Y>Tc
)pq;*~IBI
/** vvKEv/pN7
* @author treeroot @JyK|.b#0
* @since 2006-2-2 b/C`Jp
* @version 1.0 X22[tqg;&
*/ no< ^f]33
public class SortUtil { mg*qiScfW
public final static int INSERT = 1; . r[Hu40p
public final static int BUBBLE = 2; A'jP7P
public final static int SELECTION = 3; a{ ?`t|
public final static int SHELL = 4; C/TF-g-_Y
public final static int QUICK = 5; 2T V X)q<\
public final static int IMPROVED_QUICK = 6; 0tEYU:Qu
public final static int MERGE = 7; 2vAQ
public final static int IMPROVED_MERGE = 8; wtH? [>S;)
public final static int HEAP = 9; o]; [R
fjs [f'L
public static void sort(int[] data) { .ys6"V|31
sort(data, IMPROVED_QUICK); !f&Kf,#b`
} >hk=VyU;
private static String[] name={ ^eR%N8Z
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" HN&Z2v
}; `kZ@Zmj#
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private static Sort[] impl=new Sort[]{ lzYnw)Pv
new InsertSort(), ?34 e-
new BubbleSort(), J|w\@inQ
new SelectionSort(), 5A sP5
new ShellSort(), x)rM/Kq
new QuickSort(), h $L/<3oP6
new ImprovedQuickSort(), PzA|t;*
new MergeSort(), |aT| l^2R@
new ImprovedMergeSort(), v(EEG/~
new HeapSort() +YqZ((
}; uWM{JEOl
~:3QBMk::
public static String toString(int algorithm){ 4*e0 hWp
return name[algorithm-1]; 59O?_F9
} Z(Bp 0a
20Z8HwQi
public static void sort(int[] data, int algorithm) { q^r#F#*1l
impl[algorithm-1].sort(data); Y@b.sMg{
} uoXAQ6k
?)`L$Vr=
public static interface Sort { WnGGo'Z
public void sort(int[] data); c2e tc8
} ad:&$
/Rg*~Ers *
public static void swap(int[] data, int i, int j) { %oq[,h <X
int temp = data; o9F/y=.r=
data = data[j]; A9kzq_3
data[j] = temp; V}SBuQp"
} Vv8jEZ8
} ^Nmg07_R