[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; Hp04apM:
} s$isDG#Sr
int i1=l; lUB?eQuN_
int i2=mid+1; &`@YdZtd"
for(int cur=l;cur<=r;cur++){ D\&S {
if(i1==mid+1) 84.L1|k
data[cur]=temp[i2++]; -yBKA]"<I
else if(i2>r) 8 E\zjT!#\
data[cur]=temp[i1++]; PVp>L*|BZ;
else if(temp[i1] data[cur]=temp[i1++]; <+g77NL
else _*6]4\;
data[cur]=temp[i2++]; tRJ5IX##L
} 6vsA8u(|V#
} eZAMV/]jH
'0+~]4&}q
} TT/H"Ri}Jp
tngB;9c+w
改进后的归并排序: n}.e(z_"
Hs'~)T
package org.rut.util.algorithm.support; nH?6o#]N
\hgd&H0UU
import org.rut.util.algorithm.SortUtil; P0}{xq'k9v
=yZq]g6Q
/** Zh;wQCDj
* @author treeroot &Y?t
* @since 2006-2-2 88v8lt;R
* @version 1.0 0>Snps3*Z
*/ .)b<cH~%
public class ImprovedMergeSort implements SortUtil.Sort { (cOe*>L;
d<7b<f"~
private static final int THRESHOLD = 10; ?-<lIFFh
m%`YAD@2z
/* jeWv~JA%L|
* (non-Javadoc) &|{1Ws
* cl4z%qv*
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) {73V?#P4
*/ ^#<L!yo^
public void sort(int[] data) { "ktuq\a@
int[] temp=new int[data.length]; I{cH$jt<
mergeSort(data,temp,0,data.length-1); K 77iv
} G-T^1?
B1)Eo2i#
private void mergeSort(int[] data, int[] temp, int l, int r) { ~^' ,4<K-}
int i, j, k; F]yB=
int mid = (l + r) / 2; !92e$GJ} ;
if (l == r) 6/S.sj~
return; y|ZL<L
if ((mid - l) >= THRESHOLD) #j~FlY5
mergeSort(data, temp, l, mid); }8x+F2i
else "a)6g0gw
insertSort(data, l, mid - l + 1); VQHB}Y@^
if ((r - mid) > THRESHOLD) hU""YP~y
mergeSort(data, temp, mid + 1, r); AhN3~/u%7
else V'j+)!w5
insertSort(data, mid + 1, r - mid); xKSQz
%m |I=P
for (i = l; i <= mid; i++) { b!@PS$BTxq
temp = data; ^7spXfSAd
} a{T.U-0
for (j = 1; j <= r - mid; j++) { &|Duc} t
temp[r - j + 1] = data[j + mid]; ?"9h-g3`x}
} >NBc-DX^
int a = temp[l]; Njg$~30
int b = temp[r]; BS##nS-[
for (i = l, j = r, k = l; k <= r; k++) { Dm}eX:'{
if (a < b) { 6/8K2_UeoW
data[k] = temp[i++]; (NvjX})eh
a = temp; T"z<D+pN
} else { Jr!BDg
data[k] = temp[j--]; tdH[e0x B
b = temp[j]; gPKf8{#%e
} %LMpErZO
} +Umsr
} R|C`
+<1 |apS1
/** qS+;u`s
* @param data Qjfgxy]
* @param l rQimQ|+
* @param i "sN%S's
*/ $CEdJ+0z
private void insertSort(int[] data, int start, int len) { cb9-~*1
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); U9:)qvMXe
} t`H1]`c?
} D!o[Sm}JO[
} fIoc)T
} 4$KDf;m@
tS2&S 6u
堆排序： o%?)};o
w[-)c6JyE
package org.rut.util.algorithm.support; wN!\$i@E:
P?h1nxm`'
import org.rut.util.algorithm.SortUtil; T/'z,,Y
Vn^GJ'^
/** 0P5VbDv$r7
* @author treeroot WVa%<
* @since 2006-2-2 z^QrIl/<c2
* @version 1.0 n?@zp<
*/ s=n4'`y1
public class HeapSort implements SortUtil.Sort{ ^w^e~0 S
"#O9ij
/* (non-Javadoc) d&NnpjH}c
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ynIC (t
*/ uB I/3aQ
public void sort(int[] data) { g{]6*`/Z
MaxHeap h=new MaxHeap(); #%;Uh
h.init(data); .]vb\NBK7
for(int i=0;i h.remove(); 3}H{4]*%_
System.arraycopy(h.queue,1,data,0,data.length); ;_bRq:!j;
} 0DicrnH8
d{7ZO#E
private static class MaxHeap{ "] V\Y!
A2 +%
void init(int[] data){ l}uZxKuYx
this.queue=new int[data.length+1]; oK\zyNK
for(int i=0;i queue[++size]=data; hU$o^ICH
fixUp(size); Y#9W]78He
} n|{K_! f
} =1Sny7G
0/)2RmF
private int size=0; -iR2UE@M
dC({B3#e{
private int[] queue; qf x*a88
sGu.G
public int get() { xT+_JT65
return queue[1]; iM<$ n2t
} inGUN??
.}\8Y=
public void remove() { *K|~]r(F?
SortUtil.swap(queue,1,size--); u}nSdZC
fixDown(1); %/Wk+r9uu
} s:tX3X
file://fixdown Z<.&fZ^jS
private void fixDown(int k) { \\dUp>1=
int j; `7=$I~`
while ((j = k << 1) <= size) { sQ}|Lu9hZ
if (j < size %26amp;%26amp; queue[j] j++; 3xy2ZYw
if (queue[k]>queue[j]) file://不用交换 f5V-;
break; v])ew|
SortUtil.swap(queue,j,k); OE@[a
k = j; Q7aPW\-
} Jo {:]:
} r'*$'QY-N
private void fixUp(int k) { w7@`:W
while (k > 1) { N#ggT9>X
int j = k >> 1; i3w~&y-
if (queue[j]>queue[k]) H'k}/<%Q
break; \n[kzi7
SortUtil.swap(queue,j,k); VCWW(Y1Fd
k = j; !_W/p`Tc
} s/7Z.\
} |}4\Gm
f}bq
} r84^/+"T
~lo43$)^
} C+TB>~Gv`
Y%?S:&GH
SortUtil： `q36`Wn
'f<N7%eZ
package org.rut.util.algorithm; s\;/U|P_
F}}!e.>c
import org.rut.util.algorithm.support.BubbleSort; #yH+ENp0
import org.rut.util.algorithm.support.HeapSort; =de'Yy:\-
import org.rut.util.algorithm.support.ImprovedMergeSort; 8ao-]QoMZ
import org.rut.util.algorithm.support.ImprovedQuickSort; |]9@JdmV
import org.rut.util.algorithm.support.InsertSort; T01Iu
import org.rut.util.algorithm.support.MergeSort; OIPY,cj~
import org.rut.util.algorithm.support.QuickSort; u!K1K3T6k
import org.rut.util.algorithm.support.SelectionSort; FoetP`
import org.rut.util.algorithm.support.ShellSort; 01'>[h#_n
MDlH[PJ@i
/** M.Yp'Av
* @author treeroot C7C4 eW8
* @since 2006-2-2 ooVs8T2
* @version 1.0 9ngxkOGx
*/ w-n}&f
public class SortUtil { <MbhBIejr
public final static int INSERT = 1; uN)c!='I
public final static int BUBBLE = 2; w^0hVrws=,
public final static int SELECTION = 3; / dJz?0
public final static int SHELL = 4; hVF^"$
public final static int QUICK = 5; iAz0 A
public final static int IMPROVED_QUICK = 6; fmixWL7.Zg
public final static int MERGE = 7; (\F9_y,6*\
public final static int IMPROVED_MERGE = 8; 1b%Oi.;
public final static int HEAP = 9; (I~
n[Q(q[ULV
public static void sort(int[] data) { r-y;"h'
sort(data, IMPROVED_QUICK); _Ay^v#a
} qSNCBn '
private static String[] name={ UQDAql
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" q}Q G<%VR
}; G!Brt&_'
3Q$4`p;
private static Sort[] impl=new Sort[]{ ;5ki$)v"
new InsertSort(), N-K/jY
new BubbleSort(), r!&174DSR1
new SelectionSort(), B@(d5i{h
new ShellSort(), r]!#v{#.
new QuickSort(), 0#WN2f, <:
new ImprovedQuickSort(), ?b+Y])SJK
new MergeSort(), ~P'.R.e
new ImprovedMergeSort(), 4gen,^Ij
new HeapSort() }.A]=Ew
}; !Vyf2xS"
)h,yQ`.
public static String toString(int algorithm){ _bCAZa&&
return name[algorithm-1]; !i torSl
} WK6,K92
-zFJ)!/?
public static void sort(int[] data, int algorithm) { 6Hnez@d
impl[algorithm-1].sort(data); Dz0D ^(;V
} _8.TPB]no
\8xSfe
public static interface Sort { -yf8
public void sort(int[] data); Q'n+K5&p
} 23tX"e
DO(};R%=
public static void swap(int[] data, int i, int j) { 8_}t,BC
int temp = data; oMEW5.VX
data = data[j]; 0''p29
data[j] = temp; P\MDD@
} Q` &#u#
} 66&uK|