[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; cB^lSmu5
} Gx($q;8
int i1=l; l:HuG!
int i2=mid+1; e+U o-CO
for(int cur=l;cur<=r;cur++){ jT',+
if(i1==mid+1) xH uyfQLk
data[cur]=temp[i2++]; ipG+qj/=
else if(i2>r) ww,'n{_
data[cur]=temp[i1++]; Ns(F%zkm
else if(temp[i1] data[cur]=temp[i1++]; "H8N,eb2
else J.d<5`7
data[cur]=temp[i2++]; {rQ`#?J}^?
} 8wOPpdc
} wC~Uy%
7 pV3#fQ
} C.O-iBVe#
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改进后的归并排序: Xob##{P3
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package org.rut.util.algorithm.support; ,*US) &x
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import org.rut.util.algorithm.SortUtil; m{|n.b
!v=ha%w{
/** &/p9+gd
* @author treeroot X*@Sj;|m
* @since 2006-2-2 T28#?Lp6]
* @version 1.0 4j5plm=
*/ :O2N'vl47A
public class ImprovedMergeSort implements SortUtil.Sort { XT)@)c7j
:M16ijkx
private static final int THRESHOLD = 10; "- AiC6u
G(i/ @>l
/* wB@A?&UY
* (non-Javadoc) fqxMTTg@
* ryPzq}#
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) TQE_zOa:
*/ S3w? X
public void sort(int[] data) { $l=m?r=
int[] temp=new int[data.length]; CAfG3;
mergeSort(data,temp,0,data.length-1); :v`o="
} [/FIY!nC?
#\qES7We6
private void mergeSort(int[] data, int[] temp, int l, int r) { MeC@+@C
int i, j, k; ~7|z2L
int mid = (l + r) / 2; cVN|5Y
if (l == r) |yr}g-m
return; :B im`mHl
if ((mid - l) >= THRESHOLD) }I"^WCyH
mergeSort(data, temp, l, mid); (Q&Z/Fe
else C'Q} Z_
insertSort(data, l, mid - l + 1); NR" Xn7G
if ((r - mid) > THRESHOLD) >Uz3F7nHi
mergeSort(data, temp, mid + 1, r); P:G^@B3^
else /KkUCq2A
insertSort(data, mid + 1, r - mid); A#}IbcZ|b
'a}pWkLB
for (i = l; i <= mid; i++) { 8Pq|jK "
temp = data; c;VW>&,B
} SyI#Q[f'_
for (j = 1; j <= r - mid; j++) { \O56!,k
temp[r - j + 1] = data[j + mid]; e([}dz
} 1jR<H$aS
int a = temp[l]; 6v-h!1p{u
int b = temp[r]; ]'Bz%[C)
for (i = l, j = r, k = l; k <= r; k++) { !U@[lBW
if (a < b) { `J;_!~:
data[k] = temp[i++]; x(A.^Yz
a = temp; GKX#-zsh79
} else { IIzdCa{l
data[k] = temp[j--]; n=`UhC
b = temp[j]; EG,RlmcPp
} +]G;_/[2
} ?(Nls.c
} Xh5 z8
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/** 72aj4k]^
* @param data r!+)U#8
* @param l r>Vgo):s
* @param i 3/iGSG`
*/ TWMD f
private void insertSort(int[] data, int start, int len) { 278 6tZF,
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); SKGYmleR
} |,o!O39}>
} c}QjKJ-c
} rxO|k0x^C
} vb# d%1b5
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堆排序： f -bVcWI
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package org.rut.util.algorithm.support; n<MH\.!tM
}2}hH0R
import org.rut.util.algorithm.SortUtil; *+5AN306
CQS34&G$a
/** YDP<
* @author treeroot D+tn<\LF
* @since 2006-2-2 )!'SSVaRs
* @version 1.0 @X:P`?("^
*/ bV}43zI.
public class HeapSort implements SortUtil.Sort{ vI4St;
Lf3:' n
/* (non-Javadoc) cJ&%XN
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) :WE(1!P@
*/ QHOem=B
public void sort(int[] data) { C;_10Rb2ut
MaxHeap h=new MaxHeap(); }{s<!b
h.init(data); jlItPdCv
for(int i=0;i h.remove(); bEbnZ<kz*
System.arraycopy(h.queue,1,data,0,data.length); m3,i{
} t68h$u
bX8Bn0#a+
private static class MaxHeap{ +`zM^'^$
Ie4}F|#=
void init(int[] data){ &{99Owqg
this.queue=new int[data.length+1]; 0GEK xV\F
for(int i=0;i queue[++size]=data; jvA]EN6$;~
fixUp(size); '6WaG hvO
} .7" f~%&oP
} in$Pk$ c
X2~>Z^, U
private int size=0; '~2;WF0h
k? X7h2
private int[] queue; `8EHhN;
U\P ;,o
public int get() { :`25@<*u
return queue[1]; -W2 !_
} !ce5pA
ZdfIe~Oni
public void remove() { ^8-CUH\
SortUtil.swap(queue,1,size--); s-[_%
fixDown(1); {x s{
} ULj'DzlfH
file://fixdown iXeywO2nP
private void fixDown(int k) { zmF_-Q`c
int j; r!'\$(m E
while ((j = k << 1) <= size) { [;%qxAB/_
if (j < size %26amp;%26amp; queue[j] j++; ki48]#p
if (queue[k]>queue[j]) file://不用交换 F.zn:yX5
break; gq!|0
SortUtil.swap(queue,j,k); 1d,;e:=j
k = j; j'g':U
} > -OQk"o
} Nw* >$v
private void fixUp(int k) { ND77(I$3s
while (k > 1) { BNL Q]
int j = k >> 1; {fmSmD
if (queue[j]>queue[k]) ]25 xX
break; <J!#k@LY]7
SortUtil.swap(queue,j,k); 1*,f
k = j; '(4$h3-gv7
} >d%;+2
} \hoYQK j
8SR~{
} PQDWY
l.Iov?e1S
} |hk?'WGc`0
0j@gC0xu)|
SortUtil： <KlG#7M>
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package org.rut.util.algorithm; .-Yhpw>f
v47Y7s:uQ
import org.rut.util.algorithm.support.BubbleSort; B_$hi=?TTd
import org.rut.util.algorithm.support.HeapSort; &z8I@^<
import org.rut.util.algorithm.support.ImprovedMergeSort; UsP1bh4
import org.rut.util.algorithm.support.ImprovedQuickSort; E|P
import org.rut.util.algorithm.support.InsertSort; O0[.*xG
import org.rut.util.algorithm.support.MergeSort; 5srj|'ja
import org.rut.util.algorithm.support.QuickSort; Hx5t![g2K!
import org.rut.util.algorithm.support.SelectionSort; ckG`^<
import org.rut.util.algorithm.support.ShellSort; 9)}Nx>K
~H`~&?
/** KeFEUHU
* @author treeroot .Lbu[
* @since 2006-2-2 p;$Vw6W=
* @version 1.0 ?B7n,!&~
*/ PZ06 _
public class SortUtil { KsZd.Rf=@
public final static int INSERT = 1; 2j*;1
public final static int BUBBLE = 2; d[eN#<
public final static int SELECTION = 3; EFSln*|
public final static int SHELL = 4; (r78AZ
public final static int QUICK = 5; 6HeZ<.d&
public final static int IMPROVED_QUICK = 6; m_ >+$uL
public final static int MERGE = 7; OFH!z{*
public final static int IMPROVED_MERGE = 8; ?Zu2=<DU
public final static int HEAP = 9; qD0sD2 x
HE6kt6
public static void sort(int[] data) { f}qR'ognUu
sort(data, IMPROVED_QUICK); av~dH=&=
} &iYy
private static String[] name={ 3z5w}qN]M
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" W(.q.Sx>
}; M`{~AIqd(
y(!J8(yA
private static Sort[] impl=new Sort[]{ `IN/1=]5
new InsertSort(), jG~zpZh
new BubbleSort(), Y_S>S(0
new SelectionSort(), t|XQFb@}
new ShellSort(), fR]%:'2k
new QuickSort(), 98O0M#|d
new ImprovedQuickSort(), vG;)(.:
new MergeSort(), {\u=m>2U|
new ImprovedMergeSort(), D}YAu,<K
new HeapSort() d'y\~M9(
}; KicPW}_
vK@t=d
public static String toString(int algorithm){ E3%:7MB
return name[algorithm-1]; SY&)?~C
} KPW2e2{4@
j6@5"wx
public static void sort(int[] data, int algorithm) { A 9\]y%!
impl[algorithm-1].sort(data); &"G4yM
} Vm+e%
vQK*:IRKK
public static interface Sort { +eT1/x0
public void sort(int[] data); U5_1-wV
} eksYIQZ]
&\[3m^L
public static void swap(int[] data, int i, int j) { =XbOY[
int temp = data; xweV8k/
data = data[j]; YI0ubB
data[j] = temp; Rd#V,[d
} B}Lz#'5_
} YhpNeP{A