[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; (ZShhy8g
} v^@L?{"}8
int i1=l; *!Am6\+
int i2=mid+1; KG>.7xVWV7
for(int cur=l;cur<=r;cur++){ 3Xd+>'H
if(i1==mid+1) LvWU %?
data[cur]=temp[i2++]; %M}zi'qQ?
else if(i2>r) }S#.Pw%
data[cur]=temp[i1++]; `yQHPN0/
else if(temp[i1] data[cur]=temp[i1++]; ~;+i[Z&e
else v[Q)cqj/
data[cur]=temp[i2++]; @;rVB
} I.KYWs
} Y\+^\`Tqu
z7<^aS
} l$zNsf.
gKYn*
改进后的归并排序: #jZ:Ex
A:D\!5=
package org.rut.util.algorithm.support; s|,]Nb=z/
hJ}G5pX
import org.rut.util.algorithm.SortUtil; fx;5j;
3_h%g$04s
/** @W.`'b-
* @author treeroot [w{ZP4d>
* @since 2006-2-2 Ys<wWfW
* @version 1.0 ADR`j;2
*/ 2X*epU_1h
public class ImprovedMergeSort implements SortUtil.Sort { R(zsn;
A%GJ|h,i
private static final int THRESHOLD = 10; 92SB'T>
Iewq?s\Fo
/* AGv;8'`
* (non-Javadoc) F;b|A`M
* }2\"(_
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ,88Y1|:X
*/ .1pEq~>
public void sort(int[] data) { $<aBawLZO
int[] temp=new int[data.length]; sRMzU
mergeSort(data,temp,0,data.length-1); Wt`D
} cYp}$
o?b%L
private void mergeSort(int[] data, int[] temp, int l, int r) { t]` 2f3UO
int i, j, k; TtvS|09p;
int mid = (l + r) / 2; c8'8DM
if (l == r) iM9563v
return; H 0h
if ((mid - l) >= THRESHOLD) <N*>9S,}
mergeSort(data, temp, l, mid); uVk8KMYU
else :J~j*_hZ
insertSort(data, l, mid - l + 1); cpy"1=K~M
if ((r - mid) > THRESHOLD) 7&QVw(:)M
mergeSort(data, temp, mid + 1, r); ms{R|vU%b
else 4ku/3/6
insertSort(data, mid + 1, r - mid); |4c==7.
w %zw+E
for (i = l; i <= mid; i++) { i f"v4PHq
temp = data; RasoOj$
} a(7ryl~c=
for (j = 1; j <= r - mid; j++) { P~ykC{nD
temp[r - j + 1] = data[j + mid]; 3(&.[o Z
} l<HRD
int a = temp[l]; 6+FON$8
int b = temp[r]; 5_`}$"<~
for (i = l, j = r, k = l; k <= r; k++) { 6a@~;!GlI
if (a < b) { |]q=D1/A
data[k] = temp[i++]; '-vyQ^
a = temp; }-vBRY
} else { w|HZI,~
data[k] = temp[j--]; .$k"+E
b = temp[j]; md`ToU
} Dr1F|[
} }"-r;i
} 6+5Catsn
_y9P]@Q7%
/** m@@QT<
* @param data R]Oy4U,f
* @param l zFn&~lFB
* @param i NM@An2
*/ /4?`F}7)
private void insertSort(int[] data, int start, int len) { X{ =[q|P
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); _Pkh`}W:
} 5avO48;Vc
} `VsGa
} =M5M;
} KV_Ga8hs
}#8uXA
堆排序： ?~.&Y
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package org.rut.util.algorithm.support; bY~v0kg
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import org.rut.util.algorithm.SortUtil; JNaW>X$K
Xt =bc
/** E5 oD|'=WA
* @author treeroot Bx-,"Z \
* @since 2006-2-2 ;#9|l=
* @version 1.0 7Ca\ (82
*/ ^kvH/Y&
public class HeapSort implements SortUtil.Sort{ =on!&M
qD*\}b]9I
/* (non-Javadoc) Q~JKKq
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) sRQh~5kM
*/ ^4pKsO3ul
public void sort(int[] data) { v4_OUA>z,
MaxHeap h=new MaxHeap(); n-3j$x1Ne
h.init(data); )V3(nZY
for(int i=0;i h.remove(); 4QAIQQS
System.arraycopy(h.queue,1,data,0,data.length); -5 /v`
} \!Zh="hN
=zeLs0s;
private static class MaxHeap{ b0Ov+ )7#
*g4Cy8$
void init(int[] data){ 8$ZSF92C
this.queue=new int[data.length+1]; e[mhbFf-
for(int i=0;i queue[++size]=data; ^r*%BUU9]%
fixUp(size); yM:~{;HLF
} ~e77w\Q0
} F.pHL)37
k(z<Bm
private int size=0; ?vn 0%e868
A;-z#R#V5
private int[] queue; KM}4^Qc
;K\N
public int get() { Mp"ci+Iu
return queue[1]; #r.` V!=
} 0j!ke1C&C
VnSj:LUD
public void remove() { ?ZHE8
SortUtil.swap(queue,1,size--); =j+oKGkoCa
fixDown(1); 0IgnpeA]
} QHs:=i~VH
file://fixdown cbCE $
private void fixDown(int k) { ;q,)NAr&
int j; ]Uu(OI<)
while ((j = k << 1) <= size) { _lPl)8k
if (j < size %26amp;%26amp; queue[j] j++; HS6Imi
if (queue[k]>queue[j]) file://不用交换 ^UvK~5tBV
break; r` `iC5Ii
SortUtil.swap(queue,j,k); FK@ f'
k = j; _A,-[*OKI
} cxD}t'T
} ))IgB).3M
private void fixUp(int k) { >[XOMKgQ](
while (k > 1) { Z0"&
int j = k >> 1; |c oEBFG
if (queue[j]>queue[k]) d@6:|auO
break; E]H
SortUtil.swap(queue,j,k); p_5>?[TW:
k = j; W?^8/1U
} iijd$Tv
} )-.Cne;n
N{^>MRK=5
} t?9;cS4
(I7&8$Zl
} /m Q2;*|
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SortUtil： Q.9Ph ~
r%y;8$/-
package org.rut.util.algorithm; T$n>7X-r
})zB".
import org.rut.util.algorithm.support.BubbleSort; KkdG.c'
import org.rut.util.algorithm.support.HeapSort; nb0 Py>4
import org.rut.util.algorithm.support.ImprovedMergeSort; cXb @H#
import org.rut.util.algorithm.support.ImprovedQuickSort; ZSF=
import org.rut.util.algorithm.support.InsertSort; KH2F#[ !Lw
import org.rut.util.algorithm.support.MergeSort; lPRdwg-
import org.rut.util.algorithm.support.QuickSort; ^_*jp[!`b$
import org.rut.util.algorithm.support.SelectionSort; iHE0N6%q
import org.rut.util.algorithm.support.ShellSort; X(r)Z\
IqhICC1V-
/** W>`g;[ W
* @author treeroot I~p8#<4#b
* @since 2006-2-2 $[M}K
* @version 1.0 ?418*tXd
*/ A*7Io4e!
public class SortUtil { gx!*O<|e4
public final static int INSERT = 1; ASzzBR;?_
public final static int BUBBLE = 2; F!OOrW]p0
public final static int SELECTION = 3; vQ-ixh
public final static int SHELL = 4; 5i!V}hE
public final static int QUICK = 5; -H1"OJ2aF
public final static int IMPROVED_QUICK = 6; F5N>Uqr*oN
public final static int MERGE = 7; IF&g.R
public final static int IMPROVED_MERGE = 8; j+_S$T8w
public final static int HEAP = 9; I@3Q=14k%
o &BPG@n
public static void sort(int[] data) { uY&=eQ_Cb
sort(data, IMPROVED_QUICK); x @1px&^
} w1wXTt
private static String[] name={ o"'iXUJ
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" V/aQ*V{
}; )^t!|*1LA
<A#5v\{.;~
private static Sort[] impl=new Sort[]{ YHs?QsP
new InsertSort(), (bg}an
new BubbleSort(), !2GHJHxv]c
new SelectionSort(), n_<mPU
new ShellSort(), q<-%L1kc1
new QuickSort(), wENzlXeOP
new ImprovedQuickSort(), rs[?v*R74
new MergeSort(), 0-*Z<cu%l
new ImprovedMergeSort(), !+m@AQ:,
new HeapSort() 60`+9(^
}; V3## B}2[Y
.|T2\M
public static String toString(int algorithm){ (l Lu?NpIi
return name[algorithm-1]; ,+~2&>wj
} /wr6\53J
M[A-1]'
public static void sort(int[] data, int algorithm) { Xa4GqV9M/-
impl[algorithm-1].sort(data); JYPxd~T/-
} Gu2_dT
S,lxM,DL&
public static interface Sort { Q`N18I3
public void sort(int[] data); \0D$Mie
} ;U |NmC+
d&hD[v
public static void swap(int[] data, int i, int j) { !~kEtC
int temp = data; |,3l`o k
data = data[j]; qc3~cH.@
data[j] = temp; p:B ]Ft
} F@9Y\. ,
} LaDY`u0G%