[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; +=3=%%?C
} ;g|Vt}a&4
int i1=l; <Y]LY_(
int i2=mid+1; ;+9OzF ;
for(int cur=l;cur<=r;cur++){ sK}AS;:
if(i1==mid+1) Fv$tl)p*
data[cur]=temp[i2++]; 4ijtx)SA
else if(i2>r) N''QQBUD
data[cur]=temp[i1++]; yKc-:IBb{u
else if(temp[i1] data[cur]=temp[i1++]; w' 7sh5
else c7e,lgG-
data[cur]=temp[i2++]; {X!OK3e
} AFrJzh:V[
} xlI=)ak{
<Riz!(G
} 5C Dk5B_
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改进后的归并排序: 'R7 \
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package org.rut.util.algorithm.support; n#(pT3&
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import org.rut.util.algorithm.SortUtil; z#*.9/y\^R
:"%/u9<A
/** c[h~=0UtJ
* @author treeroot L+am-k:T~
* @since 2006-2-2 '2(m%X\6
* @version 1.0 pXk^EV0
*/ or]v]*:~l
public class ImprovedMergeSort implements SortUtil.Sort { 7UfNz60+~
4>KF`?%4
private static final int THRESHOLD = 10; ;*(-8R/
7~7L5PRW
/* '~[8>Q>
* (non-Javadoc) 5J5?cs-!
* w#"\*SKK
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) XNz+a|cF
*/ "aJHCi~l
public void sort(int[] data) { UL+Txc
int[] temp=new int[data.length]; 6D;N.wDZ
mergeSort(data,temp,0,data.length-1); -%asHDQ{
} p* >z:=
#D`@G8~(
private void mergeSort(int[] data, int[] temp, int l, int r) { XM$~HG
int i, j, k; gmGK3am
int mid = (l + r) / 2; $L/`nd
if (l == r) :{7+[LcH7
return; Xg)8}
if ((mid - l) >= THRESHOLD) KkJqqO"EL
mergeSort(data, temp, l, mid); P?0X az
else <Ky-3:pxeM
insertSort(data, l, mid - l + 1); WZ CI*'
if ((r - mid) > THRESHOLD) Z vysLHj
mergeSort(data, temp, mid + 1, r); a|ufm^F
else *6Wiq5M>.
insertSort(data, mid + 1, r - mid); (V{/8%mWc
8Y($ F2
for (i = l; i <= mid; i++) { eADCT
temp = data; 8w0~2-v.?V
} %8'8XDq^8
for (j = 1; j <= r - mid; j++) { EZUaYp~M
temp[r - j + 1] = data[j + mid]; fQ<sq0'e\
} RZa/la*
int a = temp[l]; [|(|"dh@^H
int b = temp[r]; mQ[$U
for (i = l, j = r, k = l; k <= r; k++) { <FT7QO$I
if (a < b) { yJA~4
data[k] = temp[i++]; (5yM%H8:
a = temp; :/5m D
} else { }`tSRB7
data[k] = temp[j--]; ;+Jx,{)
b = temp[j]; AxEyXT(h5
} &G{GLP?H
} &o:5lxR{
} [M|^e;tWK
6h:QSVfx
/** n Bu!2c
* @param data ?@64gdlwq
* @param l =2R4Z8G
* @param i ":]Xr!e
*/ u$nzpw0=H
private void insertSort(int[] data, int start, int len) { 6!<I'M'[e
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); "Y&I#&$b\
} [&lK.?V)
} il0K^i
} O. * 0;5
} J%&LQ9
z:QDWH
堆排序： bZu'5+(@
R"nB4R0Uh
package org.rut.util.algorithm.support; g4?2'G5m?
Oa[
import org.rut.util.algorithm.SortUtil; %|-N{>wKy
WgNA%.|,
/** C=?S
* @author treeroot X4;U4pU#
* @since 2006-2-2 `4"8@>D
* @version 1.0 W}(A8g#6
*/ jPh<VVQ$@
public class HeapSort implements SortUtil.Sort{ i ;FKnK
SB62(#YR
/* (non-Javadoc) _"8n&=+
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 'E|%l!xO
*/ E|O&bUMh
public void sort(int[] data) { At7!Pas#@g
MaxHeap h=new MaxHeap(); omG2p
h.init(data); &Vlno*
for(int i=0;i h.remove(); )V1XL
System.arraycopy(h.queue,1,data,0,data.length); t@%w:*&
} ^~4]"J};M
N?\X2J1
private static class MaxHeap{ (Y1*Bs[l
<A3%182
void init(int[] data){ bWFa{W5!
this.queue=new int[data.length+1]; aV;|2}q "
for(int i=0;i queue[++size]=data; ?t/qaUXN
fixUp(size); -&/?&{Q0
} {*xE+ |
} zJDHDr
)nm+_U
private int size=0; 4n,&,R r#
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private int[] queue; &PMQ]B
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public int get() { a&s34Pd
return queue[1]; kWzp*<lWe
} ~ 'ZwD/!e
dSDZMB sd
public void remove() { u8f\)m
SortUtil.swap(queue,1,size--); \0\O/^W0
fixDown(1); >S5J^c
} pW]j.JM
file://fixdown WjVBz
private void fixDown(int k) { JVAyiNIH>M
int j; :H}iL*
while ((j = k << 1) <= size) { (KQLh,h7
if (j < size %26amp;%26amp; queue[j] j++; bT:u|/I
if (queue[k]>queue[j]) file://不用交换 5`h 6oFxGp
break; @c~Z0+Ji
SortUtil.swap(queue,j,k); >X~B1D,SV7
k = j; *yZ6"
} Ww<Y]H$xZ<
} Ah2@sp,z
private void fixUp(int k) { a%#UF@I
while (k > 1) { Tm%5:/<8
int j = k >> 1; -`]9o3E7H
if (queue[j]>queue[k]) [$dVs16K
break; <\229
SortUtil.swap(queue,j,k); )%C.IZ_s2
k = j; 4$-R|@,|_
} J6 ~Sr
} N&8$tJ(hhx
( 5LCy?-6
} `>"#d ?,
V^7.@BeT
} PT>b%7Of
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SortUtil： f&-`+V}U
1]xmOx[mb
package org.rut.util.algorithm; n_kwtWX(
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import org.rut.util.algorithm.support.BubbleSort; >}SEU-7&\
import org.rut.util.algorithm.support.HeapSort; pGie!2T E
import org.rut.util.algorithm.support.ImprovedMergeSort; '54\!yQ<{
import org.rut.util.algorithm.support.ImprovedQuickSort; /-M:6
import org.rut.util.algorithm.support.InsertSort; Dk `&tr
import org.rut.util.algorithm.support.MergeSort; Ejk;(rxI
import org.rut.util.algorithm.support.QuickSort; (\:Rnl
import org.rut.util.algorithm.support.SelectionSort; tZ]gVgZg
import org.rut.util.algorithm.support.ShellSort; rPk|2l,E,3
-2.7Z`*(
/** jKUEs75]
* @author treeroot =~:IiK/#
* @since 2006-2-2 {B+}LL!
* @version 1.0 Y3 $jNuV
*/ fU6YJs.H^8
public class SortUtil { q9 Df`6+
public final static int INSERT = 1; p?gm=b#
public final static int BUBBLE = 2; p4T$(]7
public final static int SELECTION = 3; !5,C"r
public final static int SHELL = 4; ~RR!~q
public final static int QUICK = 5; ':.Hz]]/A
public final static int IMPROVED_QUICK = 6; :1+Aj (
public final static int MERGE = 7; @.;+WQE
public final static int IMPROVED_MERGE = 8; }geb959
public final static int HEAP = 9; fD!c t;UK
M`Y^hDl6
public static void sort(int[] data) { Nj9A-*0g6N
sort(data, IMPROVED_QUICK); FC0fe_U(F
} _c-3eQ1
private static String[] name={ V.Hv6
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" N,Y)'s<
}; >axeUd+@i
w$ 8r<?^3
private static Sort[] impl=new Sort[]{ cSt)Na~C
new InsertSort(), e!VtDJDS
new BubbleSort(), R3B+vLGX
new SelectionSort(), qO{z{@jo55
new ShellSort(), ` GF w?G
new QuickSort(), %`]+sg[i
new ImprovedQuickSort(), snaAn?I4
new MergeSort(), |))NjM'ZBl
new ImprovedMergeSort(), Lc!2'Do;
new HeapSort() }nrjA0WN
}; +&.zwniSS
15ailA&(Qm
public static String toString(int algorithm){ fRS;6Jc
return name[algorithm-1]; #xtH6\X
} xmg3,bO
eiK_JPFA-
public static void sort(int[] data, int algorithm) { b 3x|Dq.
impl[algorithm-1].sort(data); ^hLr9k
} _LJF:E5L
2yA)SGri
public static interface Sort { U[wx){[|
public void sort(int[] data); bq/Aopfr
} kj6:P$tH
~0MpB~ {xd
public static void swap(int[] data, int i, int j) { =E9\fRGU
int temp = data; YTTyMn
data = data[j]; %IsodtkDu
data[j] = temp; f.w",S^
} PK]3uh
} +byOThuE