[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; f!t69nd%L
} \ u+xa{b|
int i1=l; /"qcl7F
int i2=mid+1; V_U'P>_I
for(int cur=l;cur<=r;cur++){ M~6@20$oW
if(i1==mid+1) ! o,5h|\
data[cur]=temp[i2++]; ]r]k-GZ$
else if(i2>r) S\NL+V?7h
data[cur]=temp[i1++]; 2_QN&o ~h
else if(temp[i1] data[cur]=temp[i1++]; d6 _C"r
else h7_)%U<J2
data[cur]=temp[i2++]; K_-d(
} ts9pM~_~
} +UWU|:
J#3{S]*v_
} Ek.&Sf$cd'
B`#h{)[
改进后的归并排序: $<)Yyi>6E
&[|VZ[
package org.rut.util.algorithm.support; mjnUs-`W|
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import org.rut.util.algorithm.SortUtil; Y\/gU8w/
|E/L.gdP7
/** }ZZ5].-a<D
* @author treeroot (d2@Mz
* @since 2006-2-2 q$ghLGz
* @version 1.0 \Mx JH[
*/ @fn6<3
public class ImprovedMergeSort implements SortUtil.Sort { QBE@(2G}C
= Rc"^oS
private static final int THRESHOLD = 10; `kBnSio~
i&+w _hD
/* >N`6;gn*l
* (non-Javadoc) }3/~x
* y)J(K*x/$
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ]Nk!4"
*/ {gy+3
public void sort(int[] data) { q{4|Kpx@
int[] temp=new int[data.length]; fJ80tt?r
mergeSort(data,temp,0,data.length-1); +`| *s3M
} :9d\Uj,
&y_? rH
private void mergeSort(int[] data, int[] temp, int l, int r) { f5dR 5G
int i, j, k; sroGER.
int mid = (l + r) / 2; ]= x 1`j
if (l == r) X1J;1hRUP
return; Bmr<O!
if ((mid - l) >= THRESHOLD) ?KN:r E
mergeSort(data, temp, l, mid); ')PVGV(D+
else !r&Bn6*
insertSort(data, l, mid - l + 1); \%_ZV9cKF
if ((r - mid) > THRESHOLD) r)l`
mergeSort(data, temp, mid + 1, r); : 1)}Epo,
else )BV=|,j
insertSort(data, mid + 1, r - mid); wgd<3 X
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for (i = l; i <= mid; i++) { =d20Xa
temp = data; pz}mF D&[
} #+sF`qR,
for (j = 1; j <= r - mid; j++) { 0'ZYO.y
temp[r - j + 1] = data[j + mid]; mc@M,2@D
} {K.rl%_|N
int a = temp[l]; iK}v`xq
int b = temp[r]; H*U`
for (i = l, j = r, k = l; k <= r; k++) { z&'f/w8
if (a < b) { f~gSJ<t4
data[k] = temp[i++]; Z$2L~j"=!
a = temp; ]if;A)'
} else { {/UhUG
data[k] = temp[j--]; I"Q<n[g0'
b = temp[j]; [ #]jC[
} z%2w(&1
} Kmry=`=A
} LcUlc)YH5
r\mPIr|
/** X=_Z(;<&
* @param data (wL3 +
* @param l X5E '*W
* @param i i-13~Dk
*/ !UNNjBBP7
private void insertSort(int[] data, int start, int len) { ^8742.
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Y1r,2k
} (Pz8iz
} R7aXR\ R
} STT2o=
} XJFnih
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堆排序： ~zMKVM1Q.,
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package org.rut.util.algorithm.support; UH40~LxIma
i_Ar<9a~
import org.rut.util.algorithm.SortUtil; )fCMITq.|
%|?1B$s0
/** =HPu{K$
* @author treeroot zz3 r<?#5
* @since 2006-2-2 6UB6;-
* @version 1.0 C"No5r'K3
*/ twv lQ|
public class HeapSort implements SortUtil.Sort{ u%aFb*
|uQ[W17^N
/* (non-Javadoc) !rHx}n{rw
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 00qZw?%K
*/ z@`@I
public void sort(int[] data) { r /yHmEk&
MaxHeap h=new MaxHeap(); &<{}8/x8(
h.init(data); >W~=]&7{s4
for(int i=0;i h.remove(); b6Xi
System.arraycopy(h.queue,1,data,0,data.length); +/Z0
} y{;u@o?T
u2,H ]-
private static class MaxHeap{ <|Iyt[s
=VCQ*
void init(int[] data){ 7uA\&/ ,
this.queue=new int[data.length+1]; rBD2Si=
for(int i=0;i queue[++size]=data; UhA_1A'B
fixUp(size); .J:;_4x
} 777rE[\@b
} I9Om#m
"_oLe;?$c
private int size=0; JQH7ZaN
'M lXnHxt
private int[] queue; )?9\$^I
q@w"yz>
public int get() { (6o:4|xl0
return queue[1]; i)8gCDc
} ,aYU$~o#
0ZT 0
public void remove() { *CT.G'bQX
SortUtil.swap(queue,1,size--); Bj+wayMi
fixDown(1); PgTDjEo
} ktWZBQY
file://fixdown PMsC*U,oe
private void fixDown(int k) { _4Ii5CNNU
int j; ~Q_F~0y
while ((j = k << 1) <= size) { 'me:Zd
if (j < size %26amp;%26amp; queue[j] j++; LAos0bc)w\
if (queue[k]>queue[j]) file://不用交换 z2ds8-z
break; pbFYiu+
SortUtil.swap(queue,j,k); e-jw^
k = j; " C&x,Ic
} IF^[^^v+H
} dGa@<hg
private void fixUp(int k) { k5g@myb-
while (k > 1) { .h a`)@MsZ
int j = k >> 1; ;i}i5yv2
if (queue[j]>queue[k]) ^YqbjL
break; %db3f z
SortUtil.swap(queue,j,k); <qr^Nyo4
k = j; E"ZEo9y@^
} `fLfT'
} -#daBx ?
` -yhl3si
} cJ2y)`
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} +fkP+RVY
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SortUtil： cu:-MpE
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package org.rut.util.algorithm; $>EqH?EQ
\A ;^ UxG
import org.rut.util.algorithm.support.BubbleSort; C1n??Y[
import org.rut.util.algorithm.support.HeapSort; ZHb7+
import org.rut.util.algorithm.support.ImprovedMergeSort; >2nF"?"=
import org.rut.util.algorithm.support.ImprovedQuickSort; :82?'aR
import org.rut.util.algorithm.support.InsertSort; q$3HvZP
import org.rut.util.algorithm.support.MergeSort; eS* *L3
import org.rut.util.algorithm.support.QuickSort; nhp)yW
import org.rut.util.algorithm.support.SelectionSort; x Ridc^
import org.rut.util.algorithm.support.ShellSort; %;'~%\|dZM
B%)zGTp6
/** QXsfp
* @author treeroot &^AzIfX}Gw
* @since 2006-2-2 |e~u!V\m
* @version 1.0 >}70]dN7b
*/ 6|%^pjX5
public class SortUtil { JThk Wx
public final static int INSERT = 1; +yt6.L
public final static int BUBBLE = 2; bJANZn|H
public final static int SELECTION = 3; tsB.oDMP
public final static int SHELL = 4; Z4=_k{*
public final static int QUICK = 5; +}&pVe\t
public final static int IMPROVED_QUICK = 6; t;h+Cf4
public final static int MERGE = 7; m=#aHF
public final static int IMPROVED_MERGE = 8; ?`za-+<r<
public final static int HEAP = 9; o`oRG)QC
3D{82*&
public static void sort(int[] data) { [kVpzpGr
sort(data, IMPROVED_QUICK); b?sAEU;
} ZCj>MA
private static String[] name={ *oKgP8CF
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" "vv$%^
}; '\Qf,%%.
@ysJt
private static Sort[] impl=new Sort[]{ ;|Y2r^c
new InsertSort(), 22l|!B%o
new BubbleSort(), w2.qT+;v
new SelectionSort(), ": mCZUt
new ShellSort(), ]kyle3#-~
new QuickSort(), pHq{S;R2G
new ImprovedQuickSort(), YhEiN. ~
new MergeSort(), @ARAX\F
new ImprovedMergeSort(), "K9vm^xP
new HeapSort() UDhwnGTq(l
}; _HSTiJVr
]|H]9mys98
public static String toString(int algorithm){ &z7N\n
return name[algorithm-1]; .;]YJy
} ;4+qPWwq8W
]H@v
public static void sort(int[] data, int algorithm) { r0rJ.}!
impl[algorithm-1].sort(data); &f (sfM_n
} T3=-UYx]
.%-6&%1
public static interface Sort { Tb>IHoil
public void sort(int[] data); 8:;u v7p
} k#{lt-a/
8#[%?}tK
public static void swap(int[] data, int i, int j) { AT2NC6{M
int temp = data; 8 /:X& &
data = data[j]; -`<6=[QUO
data[j] = temp; 8Cf^$
} @h,h=X
} ; |E! |w