[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; 7MhN>a;A\
} y)0wM~E;2
int i1=l; $p~X"f?0
int i2=mid+1; {p)=#Jd`.P
for(int cur=l;cur<=r;cur++){ ;SVAar4r
if(i1==mid+1) !1fAW!8
data[cur]=temp[i2++]; }8)iFP&"
else if(i2>r) sq1v._^s
data[cur]=temp[i1++]; >%Nqgn$V
else if(temp[i1] data[cur]=temp[i1++]; khS >
else ,c.(&@
data[cur]=temp[i2++]; t+%tN^87:
} 5MmSQ_
} ,'^^OLez
j6r.HYX!
} I>(-&YbC
>w)A~ F<
改进后的归并排序: v&}^8j
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package org.rut.util.algorithm.support; Yb=Z`)
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import org.rut.util.algorithm.SortUtil; r E<Ou"
Ub| -Q
/** EViQB.3w\
* @author treeroot >cRE$d?
* @since 2006-2-2 GK8x<Aq%z
* @version 1.0 >do3*koA
*/ ;@lC08SE
public class ImprovedMergeSort implements SortUtil.Sort { GZk{tTv
z2Kvp"-}
private static final int THRESHOLD = 10; 0VwmV_6'<W
;1Zz-@
/* n|Smy\0
* (non-Javadoc) g*[DyIm
* =b[q<p\
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Df_*W"(v
*/ VFjNrngl
public void sort(int[] data) { ZZ@1l
int[] temp=new int[data.length]; DqbU$jt`
mergeSort(data,temp,0,data.length-1); GK\`8xWE
} J6W"t
V/CZcMY_
private void mergeSort(int[] data, int[] temp, int l, int r) { _tO:,%dL
int i, j, k; (Aw!K`0Y1
int mid = (l + r) / 2; Kta7xtu
if (l == r) 4M{]YZMw8
return; 6$_//
if ((mid - l) >= THRESHOLD) @l^BW*BCo
mergeSort(data, temp, l, mid); 6O# xV:Uc<
else qGH\3g-
insertSort(data, l, mid - l + 1); )7TuV"
if ((r - mid) > THRESHOLD) \o2cztl=
mergeSort(data, temp, mid + 1, r); mb_~ "}A
else o u*`~K|R
insertSort(data, mid + 1, r - mid); jg+q{ ^
}"o,j>IP
for (i = l; i <= mid; i++) { 1KWGQJ%%s
temp = data; R#w9%+
} A<|]>[ax
for (j = 1; j <= r - mid; j++) { 3IHA+Zz
temp[r - j + 1] = data[j + mid]; [G>U>[u|
} .L'eVLQe
int a = temp[l]; :3$-Qv X
int b = temp[r]; +ZU@MOni
for (i = l, j = r, k = l; k <= r; k++) { \qB:z7I2
if (a < b) { Y*q_>kps"
data[k] = temp[i++]; HMrl!;:
a = temp; f{j(H?5
} else { :jUu_s}
data[k] = temp[j--]; _q/UDf1
b = temp[j]; +PGtO9}B
} 3I%F,-r
} @ - _lw
} A:5B6Z
#mvOhu
/** cW*p}hD
* @param data 9]^ CDL
* @param l JC}oc M j0
* @param i Y9_OkcW)
*/ ji:E
private void insertSort(int[] data, int start, int len) { wS%aN@ay3
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); H% "R _[+
} >y7|@'V[v0
} DS]C`aM9
} p@Ng.HE
} f1}am<
D^jyG6Ch
堆排序： Sx|)GTJJ|-
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package org.rut.util.algorithm.support; i!k5P".o^
O2 sAt3'
import org.rut.util.algorithm.SortUtil; bQelU
Se>"=[=
/** N@>o:(08
* @author treeroot 0^IHBN?9
* @since 2006-2-2 1`z^Xk8vt
* @version 1.0 g Xi& S
*/ ^KO=8m( )J
public class HeapSort implements SortUtil.Sort{ Jkq?wpYp
Q@"mL
/* (non-Javadoc) 5(V'<
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) O!=ae|
*/ '"QN{ja
public void sort(int[] data) { XBF]|}%
MaxHeap h=new MaxHeap(); '}|sRuftb
h.init(data); `PVr;&
for(int i=0;i h.remove(); {u4=*>?G
System.arraycopy(h.queue,1,data,0,data.length); s)<^YASg
} m\O|BMHn
c2iPm9"eh
private static class MaxHeap{ C\WU<!
;DXcEzV
void init(int[] data){ JVx ,1lth
this.queue=new int[data.length+1]; uv$t>_^
for(int i=0;i queue[++size]=data; SC6cFyp2
fixUp(size); P.Uz[_&l6
} gk.c"$2
} `+>'18F
S_EN,2'e
private int size=0; Nt^9N #+N
n fU\l<
private int[] queue; B}y`E <
!J@!P?0. C
public int get() { /18VQ
return queue[1]; PpF"n[j
} (g>>
+>,4d
public void remove() { _Uxt9 X
SortUtil.swap(queue,1,size--); FBCi,_ \4
fixDown(1); ,b/qcu_|-
} O^W.5SaR
file://fixdown d l<7jM?
private void fixDown(int k) { 6IyD7PQ
int j; sMhUVc4
while ((j = k << 1) <= size) { b9(_bsc
if (j < size %26amp;%26amp; queue[j] j++; q=H dGv
if (queue[k]>queue[j]) file://不用交换 B-`,h pp
break; q\fZ Q
SortUtil.swap(queue,j,k); Vs0T*4C=n
k = j; 5u=(zg
} :UrS@W^B
} j(*ZPo>oD
private void fixUp(int k) { Gj%cU@2
while (k > 1) { /y.+N`_
int j = k >> 1; rnV\O L
if (queue[j]>queue[k]) }#3'72
break; <E`Ygac
SortUtil.swap(queue,j,k); ,( ?q
k = j; I2R" Y<
} G?t<4MTv
} yK #9)W-
jhN]1t/\X
} ;>z.wol
x?unE@?\S
} 5[py{Gq
Qq.ht
SortUtil： xpb,Nzwt^
NLz[F`I
package org.rut.util.algorithm; E>}(r%B
F/ODV=J-
import org.rut.util.algorithm.support.BubbleSort; PqOPRf
import org.rut.util.algorithm.support.HeapSort; 4%(\y"T
import org.rut.util.algorithm.support.ImprovedMergeSort; [A.ix}3mm
import org.rut.util.algorithm.support.ImprovedQuickSort; scsN2#D7U/
import org.rut.util.algorithm.support.InsertSort; I!L`W _
import org.rut.util.algorithm.support.MergeSort; _+vE(:T
import org.rut.util.algorithm.support.QuickSort; T|{1,wP
import org.rut.util.algorithm.support.SelectionSort; A=z+@b6
import org.rut.util.algorithm.support.ShellSort; TfbB1
"Y> #=>8
/** P&s-U6
* @author treeroot yi*2^??` 1
* @since 2006-2-2 #Pf?.NrTn
* @version 1.0 "GTlJqhk
*/ _8f? H#&
public class SortUtil { VT;Vm3\
public final static int INSERT = 1; gC+PpY#2h
public final static int BUBBLE = 2; ?Bdhn{_
public final static int SELECTION = 3; !FqJP OGm
public final static int SHELL = 4; /g_cz&luR
public final static int QUICK = 5; M'n2j
public final static int IMPROVED_QUICK = 6; 122%KS
public final static int MERGE = 7; i`Tp +e@a>
public final static int IMPROVED_MERGE = 8; w'/Mn+
public final static int HEAP = 9; ][jW2;A
l=*60Ag\J~
public static void sort(int[] data) { #'@pL0dj
sort(data, IMPROVED_QUICK); 8{t^< j$n
} zree}VqD;5
private static String[] name={ fnwhkL#8
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" =u5a'bp0;;
}; :?*|Dp1
gyt[ZN_2
private static Sort[] impl=new Sort[]{ 0Q]ZS
new InsertSort(), kTjx.
new BubbleSort(), @&AUbxoj
new SelectionSort(), /oWn0
new ShellSort(), "x+o(jOy
new QuickSort(), gyz#:z$p^
new ImprovedQuickSort(), Q(3Na6
new MergeSort(), cL]vJ`?Ih
new ImprovedMergeSort(), .;1tu+S
new HeapSort() *Va;ra(V2
}; =Ts3O0"[
a+U^mPe
public static String toString(int algorithm){ *CIR$sS
return name[algorithm-1]; |B<;4ISaRI
} G`_LD+
zmw <y2`
public static void sort(int[] data, int algorithm) { 2~*J<iO&l
impl[algorithm-1].sort(data); xksd&X:
} qPn}$1+~
kkyi`_ZKn
public static interface Sort { 6cF~8
public void sort(int[] data); m ll-cp
} b.LMJ'1
&zxqVI$4
public static void swap(int[] data, int i, int j) { / bxu{|.
int temp = data; &y7<h>z
data = data[j]; i1(}E#
data[j] = temp; mM[!g'*
} BrHw02G
} ,m`>