[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; q;_?e_
} 'Zqt~5=5
int i1=l; @X=sfygk
int i2=mid+1; R[TaP7n
for(int cur=l;cur<=r;cur++){ ]I]G3 e
if(i1==mid+1) CZ%KC$l.5
data[cur]=temp[i2++]; uLNOhgSUf
else if(i2>r) +?{LLD*2e
data[cur]=temp[i1++]; /AYq^
else if(temp[i1] data[cur]=temp[i1++]; i~*6JB|
else ,mz7!c9H^a
data[cur]=temp[i2++]; "hZ `^"0b
} 6j|~oMYP
} b{X.lz0
rA@|nL{
} NdRE,HWd?$
q6x}\$mL
改进后的归并排序: JIc9csr:b
@]42.oP
package org.rut.util.algorithm.support; 8:uh0
^x_.3E3Q
import org.rut.util.algorithm.SortUtil; m |.0$+=
ISTAJ8" D
/** OT"jV
* @author treeroot B%o%%A8*g
* @since 2006-2-2 ?zVcP=p@
* @version 1.0 )]Sf|@K]
*/ j J54<.D
public class ImprovedMergeSort implements SortUtil.Sort { /gn\7&=P
-x?|[ +%
private static final int THRESHOLD = 10; rxZk!- t)L
%:dd#';g
/* u{dkUG1ia
* (non-Javadoc) %f(4jQ0I
* _ -,[U{
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) WMFn#.aY5
*/ ;#*.@Or@Ah
public void sort(int[] data) { h645;sb0
int[] temp=new int[data.length]; CI+liH
mergeSort(data,temp,0,data.length-1); d[E= HN
} +LF=oM<
h-o;vC9fC
private void mergeSort(int[] data, int[] temp, int l, int r) { TaKCN
int i, j, k; b'xBPTN
int mid = (l + r) / 2; .RS
if (l == r) [T,Df&
return; $0]5b{i]
if ((mid - l) >= THRESHOLD) dLf ;g}W
mergeSort(data, temp, l, mid); 9yLPh/!Ob
else s,D GFK
insertSort(data, l, mid - l + 1); H/*i-%]v+(
if ((r - mid) > THRESHOLD) P#;pQC
mergeSort(data, temp, mid + 1, r); kjSzuqB
else -7EwZRS@9
insertSort(data, mid + 1, r - mid); 77 ?TRC
sr~VvciIy
for (i = l; i <= mid; i++) { `2xt%kC
temp = data; z3w;W{2Q;V
} ;]rj Kc=
for (j = 1; j <= r - mid; j++) { c|4_nT 2
temp[r - j + 1] = data[j + mid]; [ .3Gb}B
} Z(J 1A x
int a = temp[l]; 8"u.GL.
int b = temp[r]; ?w)A`G_
for (i = l, j = r, k = l; k <= r; k++) { i_I`
if (a < b) { 475jmQ{q
data[k] = temp[i++]; zD sV"D8
a = temp; &d"scM5
} else { >q&e.-qL
data[k] = temp[j--]; h@s i)5"
b = temp[j]; U/7jK40
} uR!'v
} ux[13]yY
} 'qeUI}[
YT@H^=
/** -3XnUGK
* @param data eJEcLK3u
* @param l rj<-sfs
* @param i >waA\C}
*/ *Ym+xu_5
private void insertSort(int[] data, int start, int len) { ?1X7jn`,+
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Wx8;+!2Q/
} BJsN~`=r
} Q|g>ga-a
} ^;Yjs.bI`F
} FwQGxGZ
X,K`]hb*0_
堆排序： pf3-
86o'3G9@
package org.rut.util.algorithm.support; mNX0BZ
1DF8-|+
import org.rut.util.algorithm.SortUtil; \<b42\a}
dBW4%Zh
/** &7c#i
* @author treeroot tTJ$tx
* @since 2006-2-2 "fSK7%BP
* @version 1.0 TI7)yxa=`
*/ W'Qy4bl7C
public class HeapSort implements SortUtil.Sort{ S @)P#
%@;xbKj
/* (non-Javadoc) mQtOx
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) `1R[J4e
*/ +ZRm1q
public void sort(int[] data) { o:Tpd 0F
MaxHeap h=new MaxHeap(); McvLU+
h.init(data); iyMoLZ5
for(int i=0;i h.remove(); 1w>G8
System.arraycopy(h.queue,1,data,0,data.length); I>>X-}
} N&u(9Fxn
QRER[8]r$
private static class MaxHeap{ K*"Fpx{M
e4cWi
void init(int[] data){ PC)V".W1
this.queue=new int[data.length+1]; PS??wlp7
for(int i=0;i queue[++size]=data; M5]$w]Ny9
fixUp(size); 5eas^Rm
} J {\]ZPs
} W1Om$S1
@h7 i;Ok
private int size=0; j,N,WtE
4Y@q.QP
private int[] queue; r / L
l{_1`rC'
public int get() { &|Vzo@D(!
return queue[1]; }z2K"eGt
} ]tEH`Kl
(DTkK5/%
public void remove() { IPnx5#eB
SortUtil.swap(queue,1,size--); Ly6) ,[q~
fixDown(1); _Tma1~Gq
} hQDl&A
file://fixdown R"QWap}
private void fixDown(int k) { f<@`{oP@
int j; $`/F5R!
while ((j = k << 1) <= size) { mmEe@-lE
if (j < size %26amp;%26amp; queue[j] j++; ~G~:R
if (queue[k]>queue[j]) file://不用交换 0"`|f0}c
break; <9?`zo$y
SortUtil.swap(queue,j,k); 'S;l"
k = j; vslN([@JR
} iIg99c7/&9
} ?yvjX90
private void fixUp(int k) { cX48?srG
while (k > 1) { U9q6m3#$
int j = k >> 1; Za1VJ5-
if (queue[j]>queue[k]) t$*CyYb{@
break; y1Yrf,E m=
SortUtil.swap(queue,j,k); Hp3T2|uL
k = j; |B@\Nf7
} +/8KN
} Yo2n[
~g;lVj,N'
} 0S>U_#-
X!0m,
} {hKf 'd9E
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SortUtil： " G0HsXi
<:`x> _
package org.rut.util.algorithm; 2aW"t.[j
M'ZA(LVp
import org.rut.util.algorithm.support.BubbleSort; 8x<; AL|`
import org.rut.util.algorithm.support.HeapSort; irzWk3@:
import org.rut.util.algorithm.support.ImprovedMergeSort; JA^Y:@<{/
import org.rut.util.algorithm.support.ImprovedQuickSort; =tfS@o/n
import org.rut.util.algorithm.support.InsertSort; `T$CUlt6
import org.rut.util.algorithm.support.MergeSort; 4031~A8
import org.rut.util.algorithm.support.QuickSort; mybjcsV4
import org.rut.util.algorithm.support.SelectionSort; ZCCwx71j
import org.rut.util.algorithm.support.ShellSort; FtxmCIVIV~
bA3pDt).p
/** gA:N>w&<X
* @author treeroot 8@4)p.{5I
* @since 2006-2-2 *'ex>4^
* @version 1.0 5TcirVO82
*/ +J%9%DqF
public class SortUtil { Klk[h
public final static int INSERT = 1; Fu#mMn0c
public final static int BUBBLE = 2; $~2qEe.h
public final static int SELECTION = 3; ai(J%"D"
public final static int SHELL = 4; VtC1TZ3-7
public final static int QUICK = 5; ;/.XAxkFL
public final static int IMPROVED_QUICK = 6; AP_2.V=Sn
public final static int MERGE = 7; k/}E(_e
public final static int IMPROVED_MERGE = 8; POc-`]6<F
public final static int HEAP = 9; Q:!.YSB
M}tr*L
public static void sort(int[] data) { CZ_ (IT7
sort(data, IMPROVED_QUICK); O[#pB. 4
} MzO4Yv"A
private static String[] name={ Ue)8g#
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Ym"Nj
}; X'h J&-[P
w>$2
private static Sort[] impl=new Sort[]{ xQ7-4N,
new InsertSort(), sDvtk]4o-4
new BubbleSort(), 4V0j1k&'
new SelectionSort(), HX:rVHY
new ShellSort(), }[*BC5{>
new QuickSort(), o w<.Dh
new ImprovedQuickSort(), {(!j6|jK
new MergeSort(), F;^GhiQVS
new ImprovedMergeSort(), $^4URH
new HeapSort() C@L8,Kj ~.
}; GT} =(sD L
X(ZouyD<
public static String toString(int algorithm){ OTe0[p6v
return name[algorithm-1]; _4jRUsvjY
} |0$wRl+kN
}^ j"@{~
public static void sort(int[] data, int algorithm) { W{2(fb
impl[algorithm-1].sort(data); S+EC!;@Xg
} Dk XB
amK.H"
public static interface Sort { e8"?Qm7 J
public void sort(int[] data); ]Kb3'je
} Cp2$I<T
HO(9)sK
public static void swap(int[] data, int i, int j) { U^$o<2
int temp = data; *@2?_b}A ^
data = data[j]; m# ]VdO'f
data[j] = temp; {]w@s7E
} tK+K lz
} Ph*tZrd*#