[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; "Cn<x\E b
} o`%;*tx
int i1=l; Bnu5\P
int i2=mid+1; )^[PW&=W|x
for(int cur=l;cur<=r;cur++){ =q"o%dc`R
if(i1==mid+1) _d*QA{
data[cur]=temp[i2++]; jrLV\(p
else if(i2>r) ^#p+#_*V
data[cur]=temp[i1++]; K<~J*k<v
else if(temp[i1] data[cur]=temp[i1++]; ^/:G`'
else 4fgYO]
data[cur]=temp[i2++]; %=<Kb\
} 5"^Z7+6
} [`_-;/Gx2
uK5 C-
} E0_S+`o2y
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改进后的归并排序: h:~ 8WV|
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package org.rut.util.algorithm.support; ]v|n'D-?
^M7pCetjdW
import org.rut.util.algorithm.SortUtil; Q'R*a(pm
K/IG6s;Xj
/** zPW_
* @author treeroot QvvH/u
* @since 2006-2-2 V)#rP?Y
* @version 1.0 L3|~ i&k
*/ #:M <<gk
public class ImprovedMergeSort implements SortUtil.Sort { D?`|`Mu
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private static final int THRESHOLD = 10; L`n Ma
bY!1t}ALh
/* L)-1( e<x
* (non-Javadoc) TV[@!E a
* GQ])y
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 1<$z-y'
*/ ;)ji3M
public void sort(int[] data) { DWmViuZmL
int[] temp=new int[data.length]; "C'T>^qw*
mergeSort(data,temp,0,data.length-1); u3])_oj=
} ~=i<O&nai
@; 0t+
private void mergeSort(int[] data, int[] temp, int l, int r) { !r %u@[(
int i, j, k; ~%Xs"R1c,
int mid = (l + r) / 2; L2`a| T=
if (l == r) 7>!Rg~M
return; l2 mO{'|C
if ((mid - l) >= THRESHOLD) dH_g:ocA
mergeSort(data, temp, l, mid); 3}gf%U]L
else g#s hd~e
insertSort(data, l, mid - l + 1); CCp&+LRvR
if ((r - mid) > THRESHOLD) ql2O%B.6?
mergeSort(data, temp, mid + 1, r); *Fu;sR2y%:
else la{Iqm{i
insertSort(data, mid + 1, r - mid); GPLq$^AH
>A ?{cbJ
for (i = l; i <= mid; i++) { &N:`Rler
temp = data; NhF<2[mt
} .V.ga2+
for (j = 1; j <= r - mid; j++) { M\6u4p!G!
temp[r - j + 1] = data[j + mid]; -EIfuh
} a1 .+L
int a = temp[l]; LR Dj!{k{
int b = temp[r]; ' i<}/l
for (i = l, j = r, k = l; k <= r; k++) { qJq!0F
if (a < b) { <EM'|IR?
data[k] = temp[i++]; 1ILAUtf)
a = temp; ix!4s613w
} else { Z[G:
data[k] = temp[j--]; (MnK \^Y
b = temp[j]; qfa[KD)!aB
} o7 1f<&1
} M TOZ:b
} *wu|(t_ A
C[s='v~}
/** C*&FApG
* @param data S?e*<s9k
* @param l 'm|PSwB7
* @param i z\r29IRh
*/ =x5k5NIF
private void insertSort(int[] data, int start, int len) { SJ).L.Cm6
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); (ioJ G-2u
} _ m<@ou7
} q^^&nz<A
} `VD7VX,rp*
} l$DQkbOj
R~H+.Vh
堆排序： \Ws$@J-M
z,IUCNgM
package org.rut.util.algorithm.support; H:!pFj
4$MV]ldUI
import org.rut.util.algorithm.SortUtil; ,@r 0-gL
'q, L*
/** !B:wzb_
* @author treeroot +MvO+\/
* @since 2006-2-2 Rn5{s3?F~2
* @version 1.0 YW'l),Z
*/ {LoNp0i1a
public class HeapSort implements SortUtil.Sort{ *4?%Y8;bF6
-,^Z5N#\|
/* (non-Javadoc) $@@@</VbP
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) -cL wjI
*/ L2{b~`UvP
public void sort(int[] data) { @r9[&
MaxHeap h=new MaxHeap(); GRj#1OqL
h.init(data); 6<m9guv
for(int i=0;i h.remove(); 08F~6e6a8
System.arraycopy(h.queue,1,data,0,data.length); I6RF;m:Jw
} tde&w=ec
F%`O$uXA
private static class MaxHeap{ TDZ p1zpXb
DA9f\q
void init(int[] data){ 26[m7\O
this.queue=new int[data.length+1]; ;QqC c!b
for(int i=0;i queue[++size]=data; akV-|v_
fixUp(size); JHCXUT-r{
} dz=pL$C
} meArS*d
;Wedj\Kkp
private int size=0; ]/c!;z
734<X6^1
private int[] queue; c);vl%
V6uh'2
public int get() { L#Rj~&U
return queue[1]; 84f^==Y
} R&FO-{S
`<IaQY
public void remove() { 5"2pU{xmK
SortUtil.swap(queue,1,size--); a}5/?/
fixDown(1); VkZ3Q7d
} re@;6o
file://fixdown EN;4EC7tE
private void fixDown(int k) { :XCRKRDLE
int j; eh}I?:(a?
while ((j = k << 1) <= size) { cs7K^D;.V
if (j < size %26amp;%26amp; queue[j] j++; G}#p4\/
if (queue[k]>queue[j]) file://不用交换 :[!b";pR
break; ]Ia}H+&
SortUtil.swap(queue,j,k); C1po]Ott*
k = j; [J +5
} MD>xRs
} 'l6SL- <
private void fixUp(int k) { z\c$$+t
while (k > 1) { VJOB+CKE
int j = k >> 1; Y20T$5{#
if (queue[j]>queue[k]) ]qO*(m:}o
break; OSIf>1
SortUtil.swap(queue,j,k); t 4>\;
k = j; %eW2w@8]
} ^17i98w
} 't'2z
o>e-M
} yt1dYF0Xq
Q+; N(\
} oN&U@N/>aU
L)9uBdF
SortUtil： ((T6z$:hA
bEli!N$
package org.rut.util.algorithm; #@}wl
\vF*n Z5/
import org.rut.util.algorithm.support.BubbleSort; aqKrf(Rv
import org.rut.util.algorithm.support.HeapSort; rHJtNN8$k
import org.rut.util.algorithm.support.ImprovedMergeSort; (Z?g^kjq)
import org.rut.util.algorithm.support.ImprovedQuickSort; Dgm"1+
import org.rut.util.algorithm.support.InsertSort; (gjCm0#_%
import org.rut.util.algorithm.support.MergeSort; h1Logm+m
import org.rut.util.algorithm.support.QuickSort; O>[B"mMt
import org.rut.util.algorithm.support.SelectionSort; Z!*k0<Z
import org.rut.util.algorithm.support.ShellSort; UX@8
FC#t}4as
/** 37 d-!
* @author treeroot j71RlS73
* @since 2006-2-2 gIY]hC.
* @version 1.0 8DcIM(;Z
*/ _`+2e-
public class SortUtil { A75z/O{
public final static int INSERT = 1; *_/n$& I%&
public final static int BUBBLE = 2; F~wqt7*
public final static int SELECTION = 3; Pv3qN{265
public final static int SHELL = 4; Nbd[xs-lw
public final static int QUICK = 5; sDP8!
public final static int IMPROVED_QUICK = 6; } bm ^`QY
public final static int MERGE = 7; .wf$]oQQ
public final static int IMPROVED_MERGE = 8; =&#t("
public final static int HEAP = 9; 5q _n69b
rFhi:uRV
public static void sort(int[] data) { Cp^`-=r+
sort(data, IMPROVED_QUICK); m(CAXq-t
} W3w$nV
private static String[] name={ 1)J' pDa
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Y} crE/
}; \ k &ZA
T0"q,lrdxV
private static Sort[] impl=new Sort[]{ %OJq(}
new InsertSort(), MQq!<?/
new BubbleSort(), 2 sK\.yS
new SelectionSort(), <8BNqbX
new ShellSort(), %:yVjb,Yf
new QuickSort(), Vu;z|L
new ImprovedQuickSort(), gfQ1p?
new MergeSort(), ?b xak
new ImprovedMergeSort(), >;+q,U}
new HeapSort() ] D+'Ao^'
}; `ZGKM>q`
T[%@B"
public static String toString(int algorithm){ E^? 3P'%^
return name[algorithm-1]; L16">,5
} vQmqYyOc2
$Go)Zs-bL?
public static void sort(int[] data, int algorithm) { {!xDJnF;
impl[algorithm-1].sort(data); `gz/?q
} _:+ k|I
lf}%^od~6
public static interface Sort { FQM9>l@6)>
public void sort(int[] data); jf=\\*64r4
} "z4V@gk
zXML<?w
public static void swap(int[] data, int i, int j) { Ir6g"kwCKq
int temp = data; 8K2=WYN
data = data[j]; Le*gdoW.
data[j] = temp; LTcZdQd$
} Vr hd\
} |nmt /[