[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; 1?w=v|b:P)
} !4<D^eh
int i1=l; ^O<v'\!z-
int i2=mid+1; ie[X7$@
for(int cur=l;cur<=r;cur++){ dLGHbeZ[(
if(i1==mid+1) =^p}JhQ
data[cur]=temp[i2++]; ]["%e9#aX
else if(i2>r) {k=3OIp
data[cur]=temp[i1++]; KC&XOI %
else if(temp[i1] data[cur]=temp[i1++]; p*<I_QM!
else 4r83;3WXs
data[cur]=temp[i2++]; /pkN=OBR
} _'mC*7+
} j=U"t\{
EZ>(}
} 0t7)x8c
N"<.v6Z
改进后的归并排序: E,\)tZ;,
O*/%zr
package org.rut.util.algorithm.support; S]=.p-Am
x0)=jp '
import org.rut.util.algorithm.SortUtil; ZD]{HxGL!
U:99w
/** Y5 ;a
* @author treeroot *.eeiSi{
* @since 2006-2-2 E$z-|-{>
* @version 1.0 f99"~)B|
*/ ez9F!1
public class ImprovedMergeSort implements SortUtil.Sort { Py#EjF12
G:1QXwq\j
private static final int THRESHOLD = 10; ~$>JYJj
ae-tAA[1Y
/* Ohj^Z&j
* (non-Javadoc) b00$3,L
* EdqB4-#7
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) \:F$7 *Ne
*/ fe<7D\Sp@
public void sort(int[] data) { Y=|20Y\K
int[] temp=new int[data.length]; 2%fzRXhu%
mergeSort(data,temp,0,data.length-1); F,)+9/S&
} [z\baL|
W;T0_=
private void mergeSort(int[] data, int[] temp, int l, int r) { D^h! ].3 T
int i, j, k; ,_H H8[&
int mid = (l + r) / 2; ah<p_qe9|
if (l == r) %m/lPL
return; j;48Yya'
if ((mid - l) >= THRESHOLD) \:s%;s51
mergeSort(data, temp, l, mid); \z6UWZ
else d 4tL
insertSort(data, l, mid - l + 1); !0? B=yA
if ((r - mid) > THRESHOLD) byE0Z vDM
mergeSort(data, temp, mid + 1, r); LH}9&FfjU
else z&n2JpLY7
insertSort(data, mid + 1, r - mid); ;X]B0KFe7
I)#8}[vK
for (i = l; i <= mid; i++) { rSt5@f?
temp = data; 'hWA&Xx+
} m;4ti9
for (j = 1; j <= r - mid; j++) { ceJ#>Rj
temp[r - j + 1] = data[j + mid]; "9^b1UH<
} \tvL<U"'
int a = temp[l]; bh5P98s
int b = temp[r]; ZJcX-Z!\
for (i = l, j = r, k = l; k <= r; k++) { ( ./MFf
if (a < b) { f?^-JZ
data[k] = temp[i++]; dZIbajs'
a = temp; r?Mf3U^G
} else { PfU\.[l$
data[k] = temp[j--]; ks phO-
b = temp[j]; :qqG%RB
} nu+^D$ait
} 3rFku"zT$
} w^zqYGxG)
zJ(DO>,p&
/** " wT?$E
* @param data xv2c8g~vD
* @param l ^/}4M'[w
* @param i ;{HDz$
*/ 0U/[hG"DKN
private void insertSort(int[] data, int start, int len) { KyT=:f V
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Q5dqn"?
} P-[})Z=
} !pRu?5
} oLR/\Y(
} NTX0vQG
kl~/tbf
堆排序： yU/?4/G!
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package org.rut.util.algorithm.support; $Yu'B_E6p
gloG_*W
import org.rut.util.algorithm.SortUtil; |uz<)
<Qv/# k
/** \reVA$M[
* @author treeroot tboQn~&4
* @since 2006-2-2 '{~[e**
* @version 1.0 q,#s m'S
*/ G Wa6FX:/
public class HeapSort implements SortUtil.Sort{ uUx7>algF
>G"fMOOkW
/* (non-Javadoc) IQC[ewk
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) S-\wX.`R1
*/ FsO-xG"@"
public void sort(int[] data) { \WnTpl>B
MaxHeap h=new MaxHeap(); F-o?tU
h.init(data); k kD#Bb
for(int i=0;i h.remove(); C[%&;\3S@
System.arraycopy(h.queue,1,data,0,data.length); Sn'!Nq>
} 6y Muj<L
q$yg^:]2
private static class MaxHeap{ CDtL.a\
V D7^wd9
void init(int[] data){ 4?@#w>(
this.queue=new int[data.length+1]; |[5;dt_U/
for(int i=0;i queue[++size]=data; A9SL|9Q
fixUp(size); n2-+.9cY
} ami>Pp
} OW=3t#"7Kp
g8'8"9:xC
private int size=0; "]p&7
`{K-eHlrM9
private int[] queue; b@4UR<
!D{z. KO
public int get() { }m?Ut|
return queue[1]; =ZU!i0 K
} W\Scak>
a]P%Y.?r
public void remove() { <4;, y*"n
SortUtil.swap(queue,1,size--); bp?TO]LH
fixDown(1); KK>jV
} W!.FnM5x
file://fixdown }oG6XI9
private void fixDown(int k) { JBw2#ry
int j; uA =%EEZ
while ((j = k << 1) <= size) { +?3RC$jyw
if (j < size %26amp;%26amp; queue[j] j++; L3Y2HZ
if (queue[k]>queue[j]) file://不用交换 C^'r>0
break; /<[_V/g[t?
SortUtil.swap(queue,j,k); ZHeue_~x4
k = j; [3S17tTc3
} yp=sL' E
} h7K,q S
private void fixUp(int k) { x4g6Qze
while (k > 1) { yyu-y0_
int j = k >> 1; cf>lY
if (queue[j]>queue[k]) By!u*vSev
break; FVP,$
SortUtil.swap(queue,j,k); +&f_k@+
k = j; ,Iz9!i J"
} Yyd}>+|<,
} !~F oy F
S{2;PaK
} 8'3&z-
u&o4?]6
} 4%qmwt*p
X1oR
SortUtil： ?RG;q
nSSJl
package org.rut.util.algorithm; jZidT9[g
U)-aecB!
import org.rut.util.algorithm.support.BubbleSort; avG#0AY
import org.rut.util.algorithm.support.HeapSort; \,p?pL<'
import org.rut.util.algorithm.support.ImprovedMergeSort; )q4nyT>M
import org.rut.util.algorithm.support.ImprovedQuickSort; >a2[P"
import org.rut.util.algorithm.support.InsertSort; .^F&6'h1H
import org.rut.util.algorithm.support.MergeSort; U{lf$
import org.rut.util.algorithm.support.QuickSort; `aX+Gz?
import org.rut.util.algorithm.support.SelectionSort; DtGkhq;
import org.rut.util.algorithm.support.ShellSort; W2$rC5|
BIx*(
/** 8,+T[S
* @author treeroot |mWSS'7fI
* @since 2006-2-2 j+AZ!$E
* @version 1.0 k)F!gV#
*/ r/ATZAgHP
public class SortUtil { " @""
public final static int INSERT = 1; q\!"FDOl4
public final static int BUBBLE = 2; vFLE%z{\o
public final static int SELECTION = 3; #LR6wEk
public final static int SHELL = 4; .*YOyK3H
public final static int QUICK = 5; h \`(
public final static int IMPROVED_QUICK = 6; oui0:Vy<
public final static int MERGE = 7; UBQtD|m\
public final static int IMPROVED_MERGE = 8; MMaS
public final static int HEAP = 9; Ux" ^3D
c"`HKfL
public static void sort(int[] data) { MxGQM>
sort(data, IMPROVED_QUICK); a>8]+@
} d^IX(y*$
private static String[] name={ v\!Cq+lFML
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Edh9=sxL
}; {nA+-=T
~KGE(o4p
private static Sort[] impl=new Sort[]{ T=V{3v@zs
new InsertSort(), $[cB6
new BubbleSort(), UDcr5u eKn
new SelectionSort(), IWN18aaL?
new ShellSort(), Gk58VODo
new QuickSort(), VOATza`
new ImprovedQuickSort(), ]NWcd~"b!Z
new MergeSort(), KU+u.J
new ImprovedMergeSort(), l&] %APL
new HeapSort() MB>4Y]rtU
}; +ZE"pA^C
y\iECdPU
public static String toString(int algorithm){ u5U^}<}y}
return name[algorithm-1]; d@Bd*iI<
} \Z%_dT}
Bgsi$2hI
public static void sort(int[] data, int algorithm) { !VG ]~lc
impl[algorithm-1].sort(data); xQ?$H?5B<
} qIzv|Nte
eK3d_bF+
public static interface Sort { 4T)`%Oo<}
public void sort(int[] data); +['1~5
} 8r,0Qic2K
OaN"6Ge#
public static void swap(int[] data, int i, int j) { ^eRbp?H*T
int temp = data; t?weD{O
data = data[j]; B=_5gZ4Y
data[j] = temp; e*D,2>o
} \Z~@/OVc
} Pa|*Jcr