[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; N| dwuBW
} BEkxH.
int i1=l; ]_yk,}88d
int i2=mid+1; 9 L{JU
for(int cur=l;cur<=r;cur++){ NyTv~8A`)
if(i1==mid+1) #Cda8)jl(
data[cur]=temp[i2++]; n3t0Qc
else if(i2>r) csV.AN'obq
data[cur]=temp[i1++]; ?>V4pgGCE
else if(temp[i1] data[cur]=temp[i1++]; dM{xPpnx
else ~97T0{E3
data[cur]=temp[i2++]; T _O|gU
} 8Ilg[Drj*
} iv*Ft.1t
sILkTzsw
} S/?KC^JP
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改进后的归并排序: b NBpt}$
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package org.rut.util.algorithm.support; h-Q3q:
, wT$L3
import org.rut.util.algorithm.SortUtil; )/u?_)b4"
'mz _JM
/** $~<);dYu0
* @author treeroot at@B>Rb
* @since 2006-2-2 1YmB2h[Z
* @version 1.0 0^Vc,\P?
*/ rkdwGqG
public class ImprovedMergeSort implements SortUtil.Sort { LO,G2]
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private static final int THRESHOLD = 10; gu[3L
h^h!OQKQ
/* |RBgJkS;8
* (non-Javadoc) !YlyUHD
* jj,Y:
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) FfnW
*/ 821@qr|`e
public void sort(int[] data) { Y!C=0&p
int[] temp=new int[data.length]; `gIlS^Q
mergeSort(data,temp,0,data.length-1); M~Yho".
} o:<gJzg
z}vgp\cuT
private void mergeSort(int[] data, int[] temp, int l, int r) { OchIEF"N
int i, j, k; 72qbxPY13h
int mid = (l + r) / 2; f>Mg.9gJ(
if (l == r) 51Yq>'8
return; $=/.oh
if ((mid - l) >= THRESHOLD) Hf ]aA_:
mergeSort(data, temp, l, mid); $0C1';=^}
else 8}FZ1h2 4
insertSort(data, l, mid - l + 1); Tz H*?bpP
if ((r - mid) > THRESHOLD) S.bB.<
mergeSort(data, temp, mid + 1, r); /`YHPeXu
else _u$X.5Q;
insertSort(data, mid + 1, r - mid); tl|Qw";I
Zk*/~f|\
for (i = l; i <= mid; i++) { Cf'O*RFD
temp = data; =FkU:q$
} gw0b>E8gZ&
for (j = 1; j <= r - mid; j++) { w{J0K;L
temp[r - j + 1] = data[j + mid]; ^PY*INv
} #WD}XOA
int a = temp[l]; fHek!Jv.
int b = temp[r]; uUXvBA?l
for (i = l, j = r, k = l; k <= r; k++) { K~p\B
if (a < b) { ENwDW#U9
data[k] = temp[i++]; ln#Jb&u
a = temp; DGMvYNKTj
} else { %UuV^C
data[k] = temp[j--]; XOQj?Q7)U
b = temp[j]; +~Ni7Dp]
} Hf( d x\5
} _Y'+E
} #F\}PCBe'
9K*yds
/** okx~F9
* @param data &CCp@" +
* @param l (B@:0}>
* @param i H tIl;E
*/ Fv \yhR
private void insertSort(int[] data, int start, int len) { w)o^?9T
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); `<>Emc8Z
} irSdqa/
} 7@R;lOzL3
} !BD+H/A.{
} sfSM7f
tSK{Abw1B
堆排序： .!T]sX_P
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package org.rut.util.algorithm.support; ?ic7M
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import org.rut.util.algorithm.SortUtil; qF m=(J%
9s\;,!b
/** N>?R,XM V
* @author treeroot lYkm1
* @since 2006-2-2 ;W6P$@'zs
* @version 1.0 ?[>+'6
*/ wykk</eQ.i
public class HeapSort implements SortUtil.Sort{ -=aI!7*"$
*k:Sg*neVq
/* (non-Javadoc) RX.n7Tb
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) trL:qD+{(
*/ UTw f!
public void sort(int[] data) { n5i#GvO^
MaxHeap h=new MaxHeap(); MsMNP[-l
h.init(data); ^v.~FFK
for(int i=0;i h.remove(); X(F2 5
System.arraycopy(h.queue,1,data,0,data.length); H~1&hF"d
} 0\f3La
pj.}VF!d
private static class MaxHeap{ Bd$i%.r
@RW=(&<1
void init(int[] data){ e*w2u<HP
this.queue=new int[data.length+1]; au'Zjj/Ai5
for(int i=0;i queue[++size]=data; ?9#}p
fixUp(size); 1*aw~nY0
} FVOR~z
} c?;~Z
}ie\-V
private int size=0; zoYw[YP9
5/-{.g
private int[] queue; Td%[ -
@Y":DHF5q
public int get() { Y>*{(QD
return queue[1]; ?5d7J,"<h
} IHCEuK
t><AaYij_
public void remove() { Wh4`Iv\.
SortUtil.swap(queue,1,size--); .JIn(
fixDown(1); ,B]kX/W
} /*DC`,q
file://fixdown u!TVvc
private void fixDown(int k) { ]Z?$ 5Ks
int j; ng$`<~=)\
while ((j = k << 1) <= size) { ;E0Xn-o_
if (j < size %26amp;%26amp; queue[j] j++; Z)B5g>
if (queue[k]>queue[j]) file://不用交换 Y@'ug N|[C
break; $y~!ePKh
SortUtil.swap(queue,j,k); R1Jj 3k
k = j; ^W-03
} m{itMZ@
} _&s37A&\
private void fixUp(int k) { zb/w^~J_i
while (k > 1) { w@U`@})r.
int j = k >> 1; __jFSa`at
if (queue[j]>queue[k]) 5yO%|)
break; qE73M5L&
SortUtil.swap(queue,j,k); \Q[u?/TF
k = j; wmu#@Hf/[h
} vr#_pu)f4
} |/B2Bm
.s7Cr0^k,|
} sG{hUsPa
[hU5ooB
} VY }?Nb<&
Y/Yp+W6n
SortUtil： .0$$H"t
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package org.rut.util.algorithm; <=KtRE>$
595P04
import org.rut.util.algorithm.support.BubbleSort; J6}J/
import org.rut.util.algorithm.support.HeapSort; 'Dl31w%:
import org.rut.util.algorithm.support.ImprovedMergeSort; bbevy!m
import org.rut.util.algorithm.support.ImprovedQuickSort; ZsjDe{TH
import org.rut.util.algorithm.support.InsertSort; }Xv2I$J
import org.rut.util.algorithm.support.MergeSort; @?,iy?BSG
import org.rut.util.algorithm.support.QuickSort; `8$gaA*
import org.rut.util.algorithm.support.SelectionSort; Z~O1$,Z
import org.rut.util.algorithm.support.ShellSort; Aa^%_5
i^LLKx7M&
/** kI5`[\
* @author treeroot Y{~[N yE
* @since 2006-2-2 ]AjDe]
* @version 1.0 Ar@" K!TS
*/ 5[\mwUA
public class SortUtil { 6`$HBX%.K
public final static int INSERT = 1; 0&!,+
public final static int BUBBLE = 2; __Ei;%cV
public final static int SELECTION = 3; #P8R
public final static int SHELL = 4; m4FT^^3yE
public final static int QUICK = 5; d\Q~L 3x
public final static int IMPROVED_QUICK = 6; Zi$v-b*<
public final static int MERGE = 7; $@y<.?k>UP
public final static int IMPROVED_MERGE = 8; EN^C'n
public final static int HEAP = 9; A*)G. o:
A8bDg:G1i
public static void sort(int[] data) { ;E? Z<3{
sort(data, IMPROVED_QUICK); ]=T`8)_r)
} k.b->U
private static String[] name={ DpG|Kl|d
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 0'ha!4h3Z
}; @SA:64 9
"/v{B?~%!
private static Sort[] impl=new Sort[]{ ^(5Up=.EA
new InsertSort(), "PO>@tY
new BubbleSort(), P[NAO>&tX
new SelectionSort(), iXl6XwWT%8
new ShellSort(), .6I*=qv)NA
new QuickSort(), L[4Su;D
new ImprovedQuickSort(), Ji<^s@8Zc
new MergeSort(), LIM cZh;
new ImprovedMergeSort(), o5(`7XV6D
new HeapSort() tE"aNA#=
}; X"yjsk
1an?/j,
public static String toString(int algorithm){ i@7b
return name[algorithm-1]; L8"0o 0-
} 4c"x&x|
h`X>b/V
public static void sort(int[] data, int algorithm) { ;{xk[fm=
impl[algorithm-1].sort(data); N;4tvWI
} k)+2+hX&>
q$>/~aVM
public static interface Sort { F2QX ^*
public void sort(int[] data); rVU::C+-
} wBr$3:
iC]=S}
public static void swap(int[] data, int i, int j) { FGzMbi<l#(
int temp = data; +S!gS|8P
data = data[j]; e))fbv&V
data[j] = temp; 3K Y-+ k
} .<Y7,9;YEF
} 1k&**!S]%