[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; 26nx`w?j(
} $C\BcKlmv
int i1=l; :%.D78&
int i2=mid+1; ?8$Q-1=
for(int cur=l;cur<=r;cur++){ z@Y;r=v
if(i1==mid+1) Vc2`b3"Br
data[cur]=temp[i2++]; m2o0y++TjW
else if(i2>r) nwWJ7M,A
data[cur]=temp[i1++]; 3u;oQ5<(v
else if(temp[i1] data[cur]=temp[i1++]; =}*0-\QG
else <qSC#[xu
data[cur]=temp[i2++]; Dj+f]~
} ]oxZ77ciL
} "fI6Cpc
'%D7C=;^
} c:0L+OF}xY
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改进后的归并排序: w@b)g
"8RSvT<W^5
package org.rut.util.algorithm.support; ! z**y}<T
P'2Qen*
import org.rut.util.algorithm.SortUtil; E3i4=!Y
6-I'>\U~
/** ,'+kBZOv
* @author treeroot +H.`MZ=
* @since 2006-2-2 FtZ?C@1/
* @version 1.0 ;]iRk
*/ -%~4W?
public class ImprovedMergeSort implements SortUtil.Sort { liZxBs :%i
q@&6#B
private static final int THRESHOLD = 10; #?E"x/$Y6
9FvFhY
/* g*Phv|kI
* (non-Javadoc) '7/)Ot(
* +:f"Y0
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) hc1N~$3!G
*/ `gJ(0#ac
public void sort(int[] data) { g :OI
int[] temp=new int[data.length]; yr6V3],Tp
mergeSort(data,temp,0,data.length-1); "zc l|@
} nEfK53i_
(ZGbhMK
private void mergeSort(int[] data, int[] temp, int l, int r) { <Uur^uB
int i, j, k; y(&Ac[foS}
int mid = (l + r) / 2; 6mE\OS-I
if (l == r) y2v^-q3
return; ZoeD:xnh[
if ((mid - l) >= THRESHOLD) TV:9bn?r)
mergeSort(data, temp, l, mid); GeqPRah
else :Al!1BJQ
insertSort(data, l, mid - l + 1); O8o3O 6[Y
if ((r - mid) > THRESHOLD) !<oe=)Iz|
mergeSort(data, temp, mid + 1, r); ~@!bsLSMU
else I|OoRq
insertSort(data, mid + 1, r - mid); 92c HwWZ!
T+$[eWk"a
for (i = l; i <= mid; i++) { B[}6-2<>?C
temp = data; H.;Q+A,8^
} pw#-_
for (j = 1; j <= r - mid; j++) { @L`jk+Y0vF
temp[r - j + 1] = data[j + mid]; n|hNM?v
} GB^Br6
int a = temp[l]; 9$Y=orpWxr
int b = temp[r]; fOHxtHM
for (i = l, j = r, k = l; k <= r; k++) { 5N]"~w*
if (a < b) { pdMc}=K
data[k] = temp[i++]; @d_M@\r=j
a = temp; KXrjqqXs
} else { Z,=1buSz_
data[k] = temp[j--]; k!^{eOM
b = temp[j]; K@2),(z
} Fcx&hj1gQ
} }qUX=s GG
} $j~RWfw-
3'Rx=G'
/** I'Hf{Erw
* @param data gr{ DWCK
* @param l z{543~Og59
* @param i ]iWRo'
*/ {vj)76%y
private void insertSort(int[] data, int start, int len) { "~nZ GiK
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Zfw,7am/
} *Ly6`HZ9
} 5(2;|I,T
} F{wzB
} y} '@R$
l}h!B_P'
堆排序： DDZ@$L!
0]L"H<W
package org.rut.util.algorithm.support; K:M8h{Ua
=D(j)<9$A
import org.rut.util.algorithm.SortUtil; m~|40)
0J|3kY-n>
/** cK@wsA^4
* @author treeroot "4Nt\WQ
* @since 2006-2-2 +_!QSU,@
* @version 1.0 ~Ei<Z`3}7"
*/ h;Kx!5)y
public class HeapSort implements SortUtil.Sort{ 3q.q YX
RCrCs
/* (non-Javadoc) ;a/E42eN;
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) !Cs_F&l"j
*/ f<_Cq<q"
public void sort(int[] data) { ]GS bjHsO
MaxHeap h=new MaxHeap(); A,]h),b
h.init(data); km(Po}
for(int i=0;i h.remove(); Wqnc{oq|$
System.arraycopy(h.queue,1,data,0,data.length); Sz~OX6L
} PnTu
wzA$'+Mb
private static class MaxHeap{ [^)g%|W
OI*H,Z"
void init(int[] data){ 0Gk<l{o?^
this.queue=new int[data.length+1]; dr(*T
for(int i=0;i queue[++size]=data; m 5.Zu.
fixUp(size); v19-./H^ j
} 4*L_)z&4;
} gR**@t=;j
DXo|.!P=3
private int size=0; #E?4E1bnB
J,hCvm
private int[] queue; mw!F{pw
M:8R-c#![
public int get() { `uFdwO'DD
return queue[1]; {ax:RUQxy
} wJ]d&::@h
oDR%\VY6T
public void remove() { \bF{-"7.
SortUtil.swap(queue,1,size--); H|*m$|$,
fixDown(1); [ 3Gf2_
} ,}PgOJZ
file://fixdown a#4?cEy
private void fixDown(int k) { bOB\--:]
int j; _#niyW+?~
while ((j = k << 1) <= size) { [GR;?R5
if (j < size %26amp;%26amp; queue[j] j++; a[C@
if (queue[k]>queue[j]) file://不用交换 KXy6Eno
break; $`c:&
SortUtil.swap(queue,j,k); 9Na$W:P c
k = j; @FeTz[
} "[k3kAm
} 8y L Y
private void fixUp(int k) { UZMd~|
while (k > 1) { uT{q9=w
int j = k >> 1; uD'6mk*
if (queue[j]>queue[k]) &&+H+{_Q
break; ]'}L 1r
SortUtil.swap(queue,j,k); )UR7i8]!0
k = j; VRMXtQ*1Dm
} E.TAbD&5(
} ,2q-D&)\Z
&HW9Jn
} O?2DQY?jT
+nL[MSw
} uYN`:b8
WLT"ji0w2
SortUtil： TxD#9]Q`
2 nCA<&
package org.rut.util.algorithm; | (93gJ
vQCy\Gi
import org.rut.util.algorithm.support.BubbleSort; }j%5t ~Qa
import org.rut.util.algorithm.support.HeapSort; \85i+q:LuA
import org.rut.util.algorithm.support.ImprovedMergeSort; "x-j~u?
import org.rut.util.algorithm.support.ImprovedQuickSort; TDh5lI
import org.rut.util.algorithm.support.InsertSort; xEI%D|)<
import org.rut.util.algorithm.support.MergeSort; [~HN<>L@C
import org.rut.util.algorithm.support.QuickSort; siI;"?
import org.rut.util.algorithm.support.SelectionSort; Upe%rC(
import org.rut.util.algorithm.support.ShellSort; u_enqC3
M >u_4AY
/** QV!up^Zso
* @author treeroot 2ESo2
* @since 2006-2-2 ]DcFySyv
* @version 1.0 HtFDlvdy]
*/ RP"kC4~1
public class SortUtil { aOp\91
public final static int INSERT = 1; wT@og|M
public final static int BUBBLE = 2; d-qUtgqV86
public final static int SELECTION = 3; b9krOe*j
public final static int SHELL = 4; S'" Df5
public final static int QUICK = 5; 6Oq7#3]
public final static int IMPROVED_QUICK = 6; UNYqft4
public final static int MERGE = 7; #e"[^_C@!
public final static int IMPROVED_MERGE = 8; "sTRS*
public final static int HEAP = 9; )8AXm
@]j1:PN-
public static void sort(int[] data) { A"]YM'.
sort(data, IMPROVED_QUICK); f#;>g
} .nJz G
private static String[] name={ :X=hQ:>P
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" >7|VR:U?B
}; Ac@VGT:9
s[jTP(d)8
private static Sort[] impl=new Sort[]{ uT"rq:N
new InsertSort(), G\i9:7 `
new BubbleSort(), 9w"*y#_
new SelectionSort(), OXA7w.^
new ShellSort(), *wearCPeJ
new QuickSort(), 8LKiS
new ImprovedQuickSort(), 8tL~FiHb"
new MergeSort(), N7"W{"3D
new ImprovedMergeSort(), h`q1
new HeapSort() s;e\ pt
}; 3`g^
b}`TLn
public static String toString(int algorithm){ [JiH\+XLPs
return name[algorithm-1]; f|5co>Hk
} 7.Op<
<E~'.p,
public static void sort(int[] data, int algorithm) { X'srL j.
impl[algorithm-1].sort(data); dV_G1'
} ]^E?;1$f?
la!~\wpa
public static interface Sort { :TbgFQ86~
public void sort(int[] data); lxx2H1([
} RZLq]8pM
FrS]|=LJhX
public static void swap(int[] data, int i, int j) { Ui~>SN>s
int temp = data; @"A4$`Xi3
data = data[j]; ?s01@f#
data[j] = temp; [,Gg^*umS
} (QEG4&9
} +7Gwg