[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; :@ E1Pun?
} tP`G]BCbt
int i1=l; c',:@2R
int i2=mid+1; `(,*IK a
for(int cur=l;cur<=r;cur++){ *NW QmC~
if(i1==mid+1) z,bX.*.-
data[cur]=temp[i2++]; /> 3
else if(i2>r) 30?LsYXL62
data[cur]=temp[i1++]; qB F!b0lr
else if(temp[i1] data[cur]=temp[i1++]; bEBBwv
else sm;E2BR$ `
data[cur]=temp[i2++]; @0z0m;8
} .%?-As
} Or+*q91j
,\lYPx\P[
} 0+}EA[
DD!MGf/
改进后的归并排序: ]3t1=+
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package org.rut.util.algorithm.support; /5Zp-Pq
Vvm=MBgN
import org.rut.util.algorithm.SortUtil; nn@^K6
~h)@e\Kc
/** RpO@pd m
* @author treeroot Y=vVxVI\
* @since 2006-2-2 ?P""KVpo
* @version 1.0 {f+N]Oo*
*/ [1{SY=)
public class ImprovedMergeSort implements SortUtil.Sort { p)B33ZzC
GilQtd3\
private static final int THRESHOLD = 10; -t8hi+NK
Oj4v#GK]
/* gjj 93
* (non-Javadoc) #NvQmz?J?
* ;n`R\NO9
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) j G-
*/ aUH\Ee^M:R
public void sort(int[] data) { {=3J/)='
int[] temp=new int[data.length]; Q [rj
mergeSort(data,temp,0,data.length-1); n*4lz^LR
} ;LCTCt`
S4cpQq.
private void mergeSort(int[] data, int[] temp, int l, int r) { o#qH2)tb
int i, j, k; OT%0{2c"]
int mid = (l + r) / 2; 9G0D3F
if (l == r) ]@v}y&
return; ;{vwBDV!'
if ((mid - l) >= THRESHOLD) u!Xb?:3uj
mergeSort(data, temp, l, mid); pb!V|#u"
else hAm/mu
insertSort(data, l, mid - l + 1); TG}d3ZU !
if ((r - mid) > THRESHOLD) #j;Tb2&w
mergeSort(data, temp, mid + 1, r); M)&Io6>
else @@I7$*
insertSort(data, mid + 1, r - mid); ,CP5~4u
q:I$EpKf?Q
for (i = l; i <= mid; i++) { /F.Wigv
temp = data; K]c4"JJ
} 0}{'C5
for (j = 1; j <= r - mid; j++) { {C3U6kKs;R
temp[r - j + 1] = data[j + mid]; bu>qsU3
} j~;;l!({i
int a = temp[l]; MJ`N,E[
int b = temp[r]; h.)h@$d
for (i = l, j = r, k = l; k <= r; k++) { e ^Ds
if (a < b) { (hIF]>,kl
data[k] = temp[i++]; FmEc`N9\v
a = temp; "-31'R-
} else { 7p.>\YtoR}
data[k] = temp[j--]; O*[{z)M.
b = temp[j]; #2RiLht
} `lO(s%HC
} ndink$
} `:eU.
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/** ]PWDE"
* @param data !d,8kG
* @param l 8S]".
* @param i &$'z
*/ ('O}&F1
private void insertSort(int[] data, int start, int len) { j~E",7Q'
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ~gE:-
} QzOkpewf
} 7I=C+
} `Out(Hn
} =PkO!Mm8
ht=P\E
堆排序： b| M3`
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package org.rut.util.algorithm.support; tz^/J=)"
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import org.rut.util.algorithm.SortUtil; 2f>PO +4S{
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/** 1PH:\0}
* @author treeroot :#5xA?=* S
* @since 2006-2-2 j}1zdA
* @version 1.0 P>i%7:OMZA
*/ JL=U,Mr6
public class HeapSort implements SortUtil.Sort{ YZc>dE
2I/xJ+
/* (non-Javadoc) K+*Q@R D
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) A#8q2n270*
*/ 1'.7_EQ4T
public void sort(int[] data) { j;b42G~p
MaxHeap h=new MaxHeap(); ~y HU^5D
h.init(data); wh6yPVVF/
for(int i=0;i h.remove(); *N'K/36;
System.arraycopy(h.queue,1,data,0,data.length); 7c|bc6?
} !Ucjax~
IW=cym7
private static class MaxHeap{ aNcd` $0
ncu`vYI.
void init(int[] data){ e^p +1-B
this.queue=new int[data.length+1]; $YxBE`)d-
for(int i=0;i queue[++size]=data; KWAb-yB
fixUp(size); )J]9 lW&y
} d)f@ 5/<
} k.<]4iS
q<y#pL=k"*
private int size=0; PyVC}dUAX
bO<CR
private int[] queue; J!DF^fLe
frBX{L
public int get() { Y[ N^p#t{
return queue[1]; O iFS}p
} pJ ?~fp
9aJ%`i
public void remove() { b=/curl&
SortUtil.swap(queue,1,size--); RN@ctRS
fixDown(1); pFJB'=c
} n#iwb0-
file://fixdown ZNx$r]4nF
private void fixDown(int k) { 2ZQ}7`Y
int j; }mZwd_cK
while ((j = k << 1) <= size) { ?ByM[E$
if (j < size %26amp;%26amp; queue[j] j++; |`jjHuQ;
if (queue[k]>queue[j]) file://不用交换 ~/_SMPLo
break; r:]1O*
SortUtil.swap(queue,j,k); SvR7eC
k = j; -J^(eog[6
} )*:`':_a
} [{X^c.8G)
private void fixUp(int k) { |^9BA-nA
while (k > 1) { ]TaN{"
int j = k >> 1; hxS 6:5Uc
if (queue[j]>queue[k]) RW P<B0)
break; f#Xyoa%
SortUtil.swap(queue,j,k); 0VK-g}"x
k = j; ''|#cEc)
} xGI, Lk+
} V"!G2&
U#1bp}y
} K'h1szW
|{@FMxn|q
} F9*g=
7L^%x3-|&
SortUtil： Y\0}R,]a-
xB !6_VlB
package org.rut.util.algorithm; %4W$Lq}
!|<=ZF2
import org.rut.util.algorithm.support.BubbleSort; R CkaJ3
import org.rut.util.algorithm.support.HeapSort; aC<KN:TN6
import org.rut.util.algorithm.support.ImprovedMergeSort; AL5Vu$V~n}
import org.rut.util.algorithm.support.ImprovedQuickSort; !'Q -yoHKD
import org.rut.util.algorithm.support.InsertSort; nQGQWg`
import org.rut.util.algorithm.support.MergeSort; (mlzg=szW
import org.rut.util.algorithm.support.QuickSort; [2|kl l
import org.rut.util.algorithm.support.SelectionSort; dZ _zg<
import org.rut.util.algorithm.support.ShellSort; v<fnB
_uJ"m8Tl
/** aAy'\T$x.
* @author treeroot +<prgP`v
* @since 2006-2-2 [V 8{b{
* @version 1.0 [;O^[Iybf:
*/ #k5#j4!b
public class SortUtil { YnV/M,U
public final static int INSERT = 1; kpob b
public final static int BUBBLE = 2; !d9AG|
public final static int SELECTION = 3; \|Dei);k
public final static int SHELL = 4; h[XGC=%
public final static int QUICK = 5; N~,_`=yRx
public final static int IMPROVED_QUICK = 6; Hlj6$%.
public final static int MERGE = 7; r{+aeLu
public final static int IMPROVED_MERGE = 8; ;)!"Ty|
public final static int HEAP = 9; lj&>cScC
'b:Ne,<
public static void sort(int[] data) { \Rk$t7ZH
sort(data, IMPROVED_QUICK); #\If]w*j
} s ?l%L!
private static String[] name={ HW7FP]NH
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" &:?e&
}; E1>/R
lUh*?l
private static Sort[] impl=new Sort[]{ 0kCQ0xB[a5
new InsertSort(), a5`eyL[f
new BubbleSort(), ?p8k{N(1
new SelectionSort(), <d$A)S};W
new ShellSort(), >mIg@knE
new QuickSort(), +p/1x'J
new ImprovedQuickSort(), K^i"9D)A
new MergeSort(), u39FN?<^
new ImprovedMergeSort(), >BqCkyM9Kf
new HeapSort() Ht=$] Px
}; 6`puTL?
(M% ;~y\
public static String toString(int algorithm){ lg/sMF>z\f
return name[algorithm-1]; +*EKR
} v}il(w;O
Sr y,@p)
public static void sort(int[] data, int algorithm) { h-'wV${b
impl[algorithm-1].sort(data); \K`jCsT
} kHU"AD}.
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public static interface Sort { \5[-Ml
public void sort(int[] data); R+. Nn
} [n:PNB
^LO]Z
public static void swap(int[] data, int i, int j) { ?6:cNdN
int temp = data; )}|mDN&P
data = data[j]; G\/IM
data[j] = temp; BRtXf0~&p
} 3hJH(ToO
} W]LQ &f