[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; 1)!?,O\ey
} ea6`%,lF~
int i1=l; 0*50uK=5
int i2=mid+1; eJ_$Etc
for(int cur=l;cur<=r;cur++){ Mk|*=#e;
if(i1==mid+1) wOrpp3I
data[cur]=temp[i2++]; Gn>~CoFN
else if(i2>r) '$Fu3%ft
data[cur]=temp[i1++]; )!g@MHHL
else if(temp[i1] data[cur]=temp[i1++]; of0hJR
else +9]CGYj
data[cur]=temp[i2++]; /A>1TPb09"
} jGFDj"Y
} jOU1F1
;-d2~1$
} y0\=F
ydf;g5OZ
改进后的归并排序: cBDOA<]r,
!= u S
package org.rut.util.algorithm.support; 'OvyQ/T
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import org.rut.util.algorithm.SortUtil; 3TF'[(K=
KK41I8Mw
/** p^U#1c
* @author treeroot aT}?-CUxx
* @since 2006-2-2 P/ 7aj:h~P
* @version 1.0 a.B<W9$`
*/ {z*`* O@
public class ImprovedMergeSort implements SortUtil.Sort { BTa#}LBZ+
&d&nsQ
private static final int THRESHOLD = 10; eZ;DNZK av
W=zp:6Z~
/* 6d%)MEM
* (non-Javadoc) WkSv@Y,
* K?X 6@u|h
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) R\:t 73
*/ t2#zQ[~X!
public void sort(int[] data) { A=l1_8,`h
int[] temp=new int[data.length]; SS"Z>talw
mergeSort(data,temp,0,data.length-1); `fUPq ;
} N3o kN8d
L0>w|LpRc
private void mergeSort(int[] data, int[] temp, int l, int r) { nWsR;~pK
int i, j, k; /*hS0xN*
int mid = (l + r) / 2; g33Y]\
if (l == r) ~_W>ND
return; Jec<1|
if ((mid - l) >= THRESHOLD) 'Z`fZ5q
mergeSort(data, temp, l, mid); _VI3b$
else kYU!6t1
insertSort(data, l, mid - l + 1); ~PiCA
if ((r - mid) > THRESHOLD) avEsX_.
mergeSort(data, temp, mid + 1, r); !)h?2#V8;
else =qFDrDt
insertSort(data, mid + 1, r - mid); I oFtfb[
vC_O!2E
for (i = l; i <= mid; i++) { i=j4Wg,{J
temp = data; .p /VRlLU
} +e( (!
for (j = 1; j <= r - mid; j++) { } f+hB
temp[r - j + 1] = data[j + mid]; ,7*-%05[\
} -KU@0G
int a = temp[l]; 8b:\@]g$
int b = temp[r]; wm s@1~I
for (i = l, j = r, k = l; k <= r; k++) { rKr2 K'
if (a < b) { IXt cHAgX
data[k] = temp[i++]; UCS`09KNJ
a = temp; DY!mq91
} else { [nG[@)G~0M
data[k] = temp[j--]; +d/^0^(D\5
b = temp[j]; \X0wr%I
} b%M|R%)]
} oLz9mqp2%
} }*R.>jQ+Y
;+4X<)y*>
/** ?KtvXTy{m
* @param data <nE|Y@S
* @param l <n|.Z-gF\
* @param i "RMvWuNt
*/ Cd51.Sk(l
private void insertSort(int[] data, int start, int len) { ,Z p9,nf
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); /S\y-M9
} 8WRxM%gsH
} NzuH&o][
} :h)A/k_
} E!v^j=h$u
Mq2[^l!qu
堆排序： Trwk9 +
hV>@qOl '
package org.rut.util.algorithm.support; et0yS%7+?@
z]F4Z'(e.
import org.rut.util.algorithm.SortUtil; rkC6-9V
(y{nD~k
/** ; #^Jy#)
* @author treeroot }^ G&n';J
* @since 2006-2-2 'c|Y*2@
* @version 1.0 H-Z1i
*/ HnmByn\j
public class HeapSort implements SortUtil.Sort{ <u85>x
kFF)6z:2
/* (non-Javadoc) W_z?t;
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ^7&0Pm
*/ yyVv@
public void sort(int[] data) { %Lwd1'C%
MaxHeap h=new MaxHeap(); 3O!TVSo
h.init(data); kN,WB
for(int i=0;i h.remove(); _Q3Ad>,U
System.arraycopy(h.queue,1,data,0,data.length); WmT(>JBO
} Z,bvD'u
\qh -fW; #
private static class MaxHeap{ .4-I^W"1
POCFT0R}
void init(int[] data){ zO07X*Bw
this.queue=new int[data.length+1]; (6Sf#M
for(int i=0;i queue[++size]=data; ^XQr`CqI
fixUp(size); V`z2F'vT
} niIjatT
} 1GL@t?S
W!G2$e6
private int size=0; pr(16P
$6]7>:8mz
private int[] queue; N}2xt)JZz
Fl^}tC
public int get() { Y8yRQzu
return queue[1]; !.ot&EbE
} KU}HVM{
Kzd`|+?'`M
public void remove() { (iZE}qf7g
SortUtil.swap(queue,1,size--); X@ Gm:6
fixDown(1); I=3e@aTZ,
} uY;2tZldf=
file://fixdown {%;KkC8=R
private void fixDown(int k) { jW-j+WGSM
int j; (SlrV8;
while ((j = k << 1) <= size) { gB?~!J?
if (j < size %26amp;%26amp; queue[j] j++; ~CB6+t>
if (queue[k]>queue[j]) file://不用交换 boR&'yX
break; p8q9:Tz
SortUtil.swap(queue,j,k); ]8XY"2b
k = j; Ur]~>-Z
} "A_WU|
} >cPB:kD'
private void fixUp(int k) { -\`n{$OR
while (k > 1) { 2S\~
int j = k >> 1; =e)[?{H
if (queue[j]>queue[k]) +jD{O @9
break; *YFe
SortUtil.swap(queue,j,k); r4~Bn7j2
k = j; icf[.
} C||A[JOS
} eiF!yk?2
*eO@<j?
} &!{wbm@
~OXC6z
} PIuk]&L^
>_biiW~x:
SortUtil： qK4E:dD
%8T:rS
package org.rut.util.algorithm; {daNw>TH
h !~u9
import org.rut.util.algorithm.support.BubbleSort; 6SMGXy*]^
import org.rut.util.algorithm.support.HeapSort; e_wz8]K)n
import org.rut.util.algorithm.support.ImprovedMergeSort; }V3p <
import org.rut.util.algorithm.support.ImprovedQuickSort; Qj? G KO
import org.rut.util.algorithm.support.InsertSort; IA|V^Wmt;
import org.rut.util.algorithm.support.MergeSort; pX]*&[X?
import org.rut.util.algorithm.support.QuickSort; In0kP"
import org.rut.util.algorithm.support.SelectionSort; *a@pZI0'
import org.rut.util.algorithm.support.ShellSort; .Jz$)R
"9-duDg
/** Y'n TyH
* @author treeroot j:0VtJo~
* @since 2006-2-2 9Osjh G
* @version 1.0 %TUljX K}
*/ ! G%LYHx
public class SortUtil { 0C}7=_?
public final static int INSERT = 1; MO:##C
public final static int BUBBLE = 2; QK\QvU2y
public final static int SELECTION = 3; }B_n}<tjD
public final static int SHELL = 4; ~$f+]7
public final static int QUICK = 5; qB_MDA
public final static int IMPROVED_QUICK = 6; <,l&),
public final static int MERGE = 7; | %af}# FQ
public final static int IMPROVED_MERGE = 8; q0 :Lb
public final static int HEAP = 9; qphN
I~qS6#%r
public static void sort(int[] data) { Fz16m7.
sort(data, IMPROVED_QUICK); 8=7u,t
} /'=C<HSO
private static String[] name={ GG\]}UjX
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" &G@*/2A
}; SMQuJ_
56*}}B$?
private static Sort[] impl=new Sort[]{ 'jeGERMr'
new InsertSort(), I<.3"F1}
new BubbleSort(), F]W'spF,
new SelectionSort(), YF@'t~_Z
new ShellSort(), !>/U6h,_
new QuickSort(), i6r%;ueLb
new ImprovedQuickSort(), A~-e?.
new MergeSort(), K$Y!d"D
new ImprovedMergeSort(), H!&]Di1Eh
new HeapSort() DT(A~U<y
}; v|jBRKU99
E`>-+~ZUsk
public static String toString(int algorithm){ 9p(s FQ [
return name[algorithm-1]; K/G|MT)
} /yIkHb^c
/Z>#lMg\.
public static void sort(int[] data, int algorithm) { :9c QK]O6
impl[algorithm-1].sort(data); Mno4z/4{A
} ~,Q+E8
_U$d.B'*)z
public static interface Sort { !O)Ruwy
public void sort(int[] data); !$St=!
} gyieSXz[
-zHJ#
public static void swap(int[] data, int i, int j) { PF@<>NO+W
int temp = data; lcvWx%/o@
data = data[j]; l{aXX[E&1
data[j] = temp; ;,Sl+)@h
} f6^H Q1SSt
} (I,PC*: