[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; LF?83P,UJ#
} Gd1%6}<~
int i1=l; s2L|J[Y"s
int i2=mid+1; 'h_PJ%
for(int cur=l;cur<=r;cur++){ nJ |O,*`O
if(i1==mid+1) 7$'%*|C.
data[cur]=temp[i2++]; [TvH7ott'1
else if(i2>r) Xjc{={@p3
data[cur]=temp[i1++]; \ Xow#@[
else if(temp[i1] data[cur]=temp[i1++]; E6|!G
else >tXn9'S
data[cur]=temp[i2++]; O79;tA<k
} F@4XORO;
} Px5ArSS
My0h9'K
} u{xjFx-
#z 3tSnmp
改进后的归并排序: {@1.2AWg
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package org.rut.util.algorithm.support; S3]Cz$
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import org.rut.util.algorithm.SortUtil; Au &NQ+
Ffk$8"
/** Rq~\Yf+Pm
* @author treeroot _XIls*6AK
* @since 2006-2-2 T1m'+^?"
* @version 1.0 t QkEJ pj
*/ Z{RRhJ
public class ImprovedMergeSort implements SortUtil.Sort { mz;S*ONlV
?#idmb}(
private static final int THRESHOLD = 10; 6rP[*0[
#k5WTcE
/* _S5\5[^
* (non-Javadoc) eW#U<x%P
* awN{F6@ZE
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) S]iMZ \I/
*/ \^2%v~
public void sort(int[] data) { mz@`*^7?
int[] temp=new int[data.length]; cMOvM0f
mergeSort(data,temp,0,data.length-1); :#v8K;C
} .f 4a+w
B4 5B`Ay
private void mergeSort(int[] data, int[] temp, int l, int r) { Y\luz`v
int i, j, k; J;4x-R$W
int mid = (l + r) / 2; FDM&rQ
if (l == r) ~Fv&z'R
return; 9.ZhkvR4A
if ((mid - l) >= THRESHOLD) HubSmbS1
mergeSort(data, temp, l, mid); C-4NiXa
else pisjfNT`o
insertSort(data, l, mid - l + 1); [?$ZB),L8
if ((r - mid) > THRESHOLD) 0 ;kcSz
mergeSort(data, temp, mid + 1, r); Z)Y--`*
else *F/uAI^)
insertSort(data, mid + 1, r - mid); B MU@J
0:UK)t)3I
for (i = l; i <= mid; i++) { cn#JO^8
temp = data; 'bp*hqG[
} xxOo8+kA
for (j = 1; j <= r - mid; j++) { HVaWv].
temp[r - j + 1] = data[j + mid]; 9k=-8@G9
} ;V]EF
int a = temp[l]; bUbM}
int b = temp[r]; .CH0PK=l
for (i = l, j = r, k = l; k <= r; k++) { ;K38I}
if (a < b) { IQ[?ej3W
data[k] = temp[i++]; ZK<kn8JJ
a = temp; T677d.zaT
} else { un0tzz
data[k] = temp[j--]; }Zu2GU$6
b = temp[j]; (yQ]n91Q,
} 7qSlqA<Hs
} Dt?O_Bdv[
} 6#VG,'e3
Okm&b g
/** QA7SQcd,
* @param data e&Z}struE
* @param l _KiaeVE
* @param i P lJl#-BO
*/ -\:#z4Tc
private void insertSort(int[] data, int start, int len) { Q#xeu
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 'SF+P)Kmz
} H6?ZE
} 7cin?Z1
} d!/@+i
} RbX!^v<0f6
)\_xB_K\
堆排序： yA_;\\
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package org.rut.util.algorithm.support; X1G[&
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import org.rut.util.algorithm.SortUtil; ^c{}G<U^
O-B~~$g
/** $@d`Kz;
* @author treeroot `EVTlq@<
* @since 2006-2-2 j-|YE?AA
* @version 1.0 c 2j?<F1
*/ L(Q v78F
public class HeapSort implements SortUtil.Sort{ r4caIV
|`T3H5X>
/* (non-Javadoc) bep}|8,#u
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) p#~'xq
*/ m&o}qzC'y
public void sort(int[] data) { X&DuX %x0
MaxHeap h=new MaxHeap(); |8}f
h.init(data); ,}F2l|x_
for(int i=0;i h.remove(); *FDz20S
System.arraycopy(h.queue,1,data,0,data.length); ):?ype>
} p.i$[6M
p3O%|)yV
private static class MaxHeap{ o>#<c @
K[)N/Q
void init(int[] data){ nW+rJ
this.queue=new int[data.length+1]; :7%JD.;W
for(int i=0;i queue[++size]=data; 6"Q/Y[y
fixUp(size); b1{~j]"$L
} +(3"XYh
} ; iQ@wOL]
{LTb-CB
private int size=0; Y9~;6fg
k9UmTvX
private int[] queue; pWH8ex+
j~c7nWfX
public int get() { E }|g3
return queue[1]; (WiA
} !OM9aITv[
\lHi=}0
public void remove() { I$0`U;Xd
SortUtil.swap(queue,1,size--); 5P{dey!
fixDown(1); K !8+~[
} 8yax.N j
file://fixdown >1:s.[&
private void fixDown(int k) { @8C^[fDL
int j; At%g^
while ((j = k << 1) <= size) { JbzYr]k
if (j < size %26amp;%26amp; queue[j] j++; Taxi79cH
if (queue[k]>queue[j]) file://不用交换 k\_>/)g
break; ^ cN-
SortUtil.swap(queue,j,k); _m;cX!+~_
k = j; XG<J'3
} ` _()R`=
} _dppUUm
private void fixUp(int k) { D h]+HF
while (k > 1) { $1oU^VY
int j = k >> 1; >`= '~y8
if (queue[j]>queue[k]) FOpOS?Cr'
break; PYr#vOH
SortUtil.swap(queue,j,k); ;+K:^*oJ
k = j; kac@yQD
} 6}R^L(^M
} DU$]e1
\*6%o0c
} :Oo
kM]:~b2
} aAO[Y"-:,Y
qhVDC
SortUtil： KL*ZPKG
N^q*lV#kob
package org.rut.util.algorithm; oTo'? E#
3O%[k<S\VO
import org.rut.util.algorithm.support.BubbleSort; liFNJd`|o+
import org.rut.util.algorithm.support.HeapSort; : Ey
import org.rut.util.algorithm.support.ImprovedMergeSort; Nt67Ye3;
import org.rut.util.algorithm.support.ImprovedQuickSort; e.G&hJr
import org.rut.util.algorithm.support.InsertSort; 4nkH0dJQ
import org.rut.util.algorithm.support.MergeSort; k='sI^lF
import org.rut.util.algorithm.support.QuickSort; {.SN
import org.rut.util.algorithm.support.SelectionSort; !Qrlb>1z-
import org.rut.util.algorithm.support.ShellSort; 0sVCTJ@
zm2&\8J
/** #QZg{
* @author treeroot ih2H~c>O
* @since 2006-2-2 B$g!4C `g
* @version 1.0 ~b5aT;ObR
*/ Yg/e8Q2
public class SortUtil { g]iWD;61
public final static int INSERT = 1; /fA:Fnv
public final static int BUBBLE = 2; ,!kqEIp%
public final static int SELECTION = 3; nlHH}K
public final static int SHELL = 4; jnt0,y A
public final static int QUICK = 5; X1:|
public final static int IMPROVED_QUICK = 6; UBpYR> <\
public final static int MERGE = 7; Rg<y8~|'}
public final static int IMPROVED_MERGE = 8; A)040n
public final static int HEAP = 9; e+bpbyV_#
dTyTj|"x{
public static void sort(int[] data) { (rt DT
sort(data, IMPROVED_QUICK); Um;ReJ8z
} vuuID24:
private static String[] name={ Ts:dnGR5
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 56u'XMB?
}; ckP&N:tC
ko im@B
private static Sort[] impl=new Sort[]{ 1 dz&J\|E#
new InsertSort(), Y%p"RB[
new BubbleSort(), tbAN{pX
new SelectionSort(), ~zRUJ2hD!
new ShellSort(), PmvTCfsg
new QuickSort(), Gw!jYnU
new ImprovedQuickSort(), ")ow,r^"
new MergeSort(), )<DL'
new ImprovedMergeSort(), J[L$8y:
new HeapSort() Mb3,!
}; E8jdQS|i
&AGV0{NMh]
public static String toString(int algorithm){ &k&tkE
return name[algorithm-1]; nE]R0|4h
} gsc/IUk
%,a.431gi
public static void sort(int[] data, int algorithm) { :CSys62
impl[algorithm-1].sort(data); mn*.z!N=
} q ]rsp0P2
+F&w~UT
public static interface Sort { E~2}rK+#)
public void sort(int[] data); 3RscuD&
} q{@>2AlK
o?$D09j;;
public static void swap(int[] data, int i, int j) { p}R)qz-=5U
int temp = data; PLg`\|
data = data[j]; `zC_?+
data[j] = temp; p4<&NMG
} )oG_x{
} |?V6__9