[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; T<b+s#n4
} d3Di/Iej
int i1=l; m}j:nk
int i2=mid+1; -~f511<
for(int cur=l;cur<=r;cur++){ H U+ I
if(i1==mid+1) T? ,P*l
data[cur]=temp[i2++]; Cr ?4Ngw
else if(i2>r) bJ /5|E?
data[cur]=temp[i1++]; m#e3%150{
else if(temp[i1] data[cur]=temp[i1++]; wEW4gz{s
else ->{d`-}m'
data[cur]=temp[i2++]; <W)u{KS#TY
} A=5epsB
} q%YV$$c
R,2P3lv1v@
} nR;D#"p%
C#pZw[
改进后的归并排序: e 8\;t"D
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package org.rut.util.algorithm.support; &BE g
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import org.rut.util.algorithm.SortUtil; $(pF;_W
d@C&+#QDF
/** o|pT;1a"
* @author treeroot u+t$l^S
* @since 2006-2-2 o]n!(f<(*
* @version 1.0 #K\?E.9h
*/ 13'vH]S$M
public class ImprovedMergeSort implements SortUtil.Sort { u6u=2
7%?jL9Vw
private static final int THRESHOLD = 10; J8a*s`ik
G_H?f\/
/* '\#EIG
* (non-Javadoc) d%@~mcH>
* pv!oz2w1
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) s) O[t
*/ K0+.q?8D|
public void sort(int[] data) { zLw{ {|
int[] temp=new int[data.length]; :wqC8&V
mergeSort(data,temp,0,data.length-1); F|bYWYED;
} ikBYd }5
SAV%4
private void mergeSort(int[] data, int[] temp, int l, int r) { "[p@tc?5
int i, j, k; rZPT89M6
int mid = (l + r) / 2; N/QiI.V6
if (l == r) wd@aw/
return; abNV4 ,M
if ((mid - l) >= THRESHOLD) Lw7=+h)
mergeSort(data, temp, l, mid); 2L_6x<u'
else 2?C`4AR[2H
insertSort(data, l, mid - l + 1); ,tH5e&=U01
if ((r - mid) > THRESHOLD) nR>r2wMk@
mergeSort(data, temp, mid + 1, r); X6+qpp
else ysIh[1E~%:
insertSort(data, mid + 1, r - mid); @Y,7'0U
x3ERCqTR
for (i = l; i <= mid; i++) { 5l-mW0,MK
temp = data; 8N%Bn&
} _/*U2.xS
for (j = 1; j <= r - mid; j++) { ^>y@4qB
temp[r - j + 1] = data[j + mid]; 2 !" XzdD
} V==z"
int a = temp[l]; jDM w2#<
int b = temp[r]; spofLu.
for (i = l, j = r, k = l; k <= r; k++) { O#EV5FeF.
if (a < b) { l%R50aL
data[k] = temp[i++]; i|)Su4Dw
a = temp; Syp"L;H8Em
} else { ]{~NO{0@Y
data[k] = temp[j--]; 8;Fn7k_Uf
b = temp[j]; "P@>M)-9Z
} XNMa0
} gkBdR +
} CRve.e8J
4n1; Bh$
/** XMB[h
* @param data ;;$#)b
* @param l C${S^v
* @param i e6B{QP#jq
*/ 8@{OR"Ec
private void insertSort(int[] data, int start, int len) { kPBV6+d~
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ZlYPoOq
} gG%V 9eOQ
} Uawpfgc}
} ,B&fFis
} h0oMTiA
+(D$9{y
堆排序： C'=k&#<-
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package org.rut.util.algorithm.support; J?JeU/:+
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import org.rut.util.algorithm.SortUtil; @=]~\[e\
{*ZY(6^
/** M}_i52
* @author treeroot XS0xLt=
* @since 2006-2-2 .I VlEG0
* @version 1.0 KD1=Y80P
*/ )yY6rI;:
public class HeapSort implements SortUtil.Sort{ ~m1P_`T
_ 7PMmW@
/* (non-Javadoc) >StO.Q99
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 5G0$
*/ YI-O{U
public void sort(int[] data) { 8;y&Pb~)
MaxHeap h=new MaxHeap(); rV({4cIe9R
h.init(data); f\;65k_jq
for(int i=0;i h.remove(); f"7M^1)h2%
System.arraycopy(h.queue,1,data,0,data.length); Z34Wbun4
} ~A<H9Bw
O9'x-A%
private static class MaxHeap{ :0K8h
{ 74mf'IW
void init(int[] data){ J`IDlGFYp
this.queue=new int[data.length+1]; k+V6,V)my
for(int i=0;i queue[++size]=data; FVv8--
fixUp(size); j` E +qk
} Pi%%z
} r[.>P$U
obK*rdg,
private int size=0; 9p 4"r^
Obw?_@X
private int[] queue; Z3;!l
C8#@+Q.
public int get() { wOQ#N++C
return queue[1]; <?D[9Mk$
} IfO;S*Qt
;)Kh;;e
public void remove() { &`Y!;@K9W#
SortUtil.swap(queue,1,size--); xX0-]Y h:
fixDown(1); Cp^@zw*/
} d"G+8}.4
file://fixdown 7z\m; 1
private void fixDown(int k) { IdIrI
int j; #jpoHvth
while ((j = k << 1) <= size) { 3:"]Rn([P
if (j < size %26amp;%26amp; queue[j] j++; c/L>>t
if (queue[k]>queue[j]) file://不用交换 =H0vE7{*
break; #{r#;+
SortUtil.swap(queue,j,k); V~GWl1#7
k = j; `"iY*
} S1n3(U:m
} _$<Gyz*
private void fixUp(int k) { RjJU4q
while (k > 1) { ""O"
int j = k >> 1; ?^' 7+8C*J
if (queue[j]>queue[k]) UE _fpq
break; _u"nvgVz9
SortUtil.swap(queue,j,k); s6 ( z
k = j; ?#0snlah|
} DPrBFmHF
} >}~#>Ru
/wQL
} ]DFXPV
U,/6;}
} < `qRA]
<1w/hy&mWN
SortUtil： "HD+rmUEH
3qHQX?a
package org.rut.util.algorithm; SgMrce<;
4vK8kkW1
import org.rut.util.algorithm.support.BubbleSort; &m3.h!dq
import org.rut.util.algorithm.support.HeapSort; |VOg\[f
import org.rut.util.algorithm.support.ImprovedMergeSort; D+V7hpH-
import org.rut.util.algorithm.support.ImprovedQuickSort; Mv|ykJoz"
import org.rut.util.algorithm.support.InsertSort; aYL|@R5;e
import org.rut.util.algorithm.support.MergeSort; KDi|(
import org.rut.util.algorithm.support.QuickSort; |( (zTf
import org.rut.util.algorithm.support.SelectionSort; [#" =yzR<3
import org.rut.util.algorithm.support.ShellSort; aI zv
c_{z(W"
/** pDPxl?S
* @author treeroot ?[ly`>KpJ
* @since 2006-2-2 g}&hl"j
* @version 1.0 U]qav,^[
*/ ?&WYjTU]H
public class SortUtil { `Yc_5&"
public final static int INSERT = 1; L~{_!Q
public final static int BUBBLE = 2; '"pd
public final static int SELECTION = 3; ]!1OH |Ad
public final static int SHELL = 4; #Z=tJ
public final static int QUICK = 5; O9v_y+M+M
public final static int IMPROVED_QUICK = 6; +]>+a<x*%
public final static int MERGE = 7; 39e;
public final static int IMPROVED_MERGE = 8; ,F+B Wot4
public final static int HEAP = 9; *, Ld/O;s
(dJI_A
public static void sort(int[] data) { N\t1T(C|
sort(data, IMPROVED_QUICK); -0o[f53}p
} PZ:u_*Vu`
private static String[] name={ m!XI{F@x
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 3HG;!D~m;
}; TL= YQA
fi PIAT}
private static Sort[] impl=new Sort[]{ m(D]qYwh
new InsertSort(), Ue5O9;y]u
new BubbleSort(), ~CRSL1?
new SelectionSort(), K5 3MMH[q#
new ShellSort(), Gtv,Izt
new QuickSort(), RR1A65B
new ImprovedQuickSort(), J}spiVM
new MergeSort(), <Pqv;WI|R
new ImprovedMergeSort(), @54*.q$
new HeapSort() q)u2Y]
}; @b&84Gn2 r
78#!Q.##
public static String toString(int algorithm){ ;'T{li2
return name[algorithm-1]; g]mtFrP
} {B$2"q/~
fT:}Lj\L1
public static void sort(int[] data, int algorithm) { ]*"s\ix
impl[algorithm-1].sort(data); 4FeEGySow
} F SMj
R5Yl1
public static interface Sort { AWr}"r?s
public void sort(int[] data); .;/L2Jv
} S^RUw
r2*<\ax
public static void swap(int[] data, int i, int j) { )9"oL!2h
int temp = data; `ue[q!Qq
data = data[j]; ~d>%,?zz
data[j] = temp; _fTwmnA
} ";3*?/uM
} `hh9"Ws%