[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; B>I:KGkV
} r}(mjC"o
int i1=l; JJs*2y
int i2=mid+1; "&`>+Yw
for(int cur=l;cur<=r;cur++){ |+[Y_j
if(i1==mid+1) j B1ZF#
data[cur]=temp[i2++]; 9;9ge
else if(i2>r) C7AD1rl
data[cur]=temp[i1++]; a3A3mBw
else if(temp[i1] data[cur]=temp[i1++]; :AQ9-&i/a-
else / $s(OFbi#
data[cur]=temp[i2++]; 'R-g:X\{
} JrX. f
} Q`;eI a6U
?'H+u[1.
} e^x%d[sU
)%kiM<})
改进后的归并排序: 'mm>E
CY*GCkH
package org.rut.util.algorithm.support; @CxgoX^
<R~;|&o,$
import org.rut.util.algorithm.SortUtil; MZWv#;.]
@,2,(=l*C
/** =[Z3]#h
* @author treeroot ;|$oz{Ll
* @since 2006-2-2 oIj-Y`92!
* @version 1.0 ,)TnIByM
*/ Aeo=m}C;
public class ImprovedMergeSort implements SortUtil.Sort { {Xr 9]g`
u~JR]T
private static final int THRESHOLD = 10; ;R<V-gab
b5KK0Jjk
/* 8A::q;
* (non-Javadoc) bR:hu}YS
* vg"*%K$a
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 9`"#OQPn1
*/ ZSD7%gE<D
public void sort(int[] data) { ~v:IgS
int[] temp=new int[data.length]; z!.cc6R
mergeSort(data,temp,0,data.length-1); !"-.D4*r
} $A/?evJi8R
1A#/70Mo
private void mergeSort(int[] data, int[] temp, int l, int r) { X8R:9q_
int i, j, k; EQw7(r|v:
int mid = (l + r) / 2; c6h+8QS
if (l == r) /;[x3}[
return; SXvflr] =m
if ((mid - l) >= THRESHOLD) _%\%
mergeSort(data, temp, l, mid); cnw+^8
else gf9U<J#&C
insertSort(data, l, mid - l + 1); W!Hn`T
if ((r - mid) > THRESHOLD) TiG?r$6v%
mergeSort(data, temp, mid + 1, r); {X_I>)Wg
else qHo Hh
insertSort(data, mid + 1, r - mid); &N+`O)$
~_F;>N~
for (i = l; i <= mid; i++) { B%kC>J
temp = data; ` vFDO$K
} AGjjhbGB
for (j = 1; j <= r - mid; j++) { >ZeARCf"f
temp[r - j + 1] = data[j + mid]; TXf60{:f
} Z5*(xony0
int a = temp[l]; N[fwd=$\#
int b = temp[r]; q"DHMZB
for (i = l, j = r, k = l; k <= r; k++) { KK6z3"tk5
if (a < b) { >msQ@Ch
data[k] = temp[i++]; )54a' Hp
a = temp; kUT^o
} else { YU)%-V\
data[k] = temp[j--]; rl$"~/ oz
b = temp[j]; CF\wR;6k
} ?UOaqcL
} ]sE)-8
} "O|.e`C%^
/0fHkj/J=B
/** nD]MgT
* @param data "M\rO!f:
* @param l XZ3fWcw[
* @param i V}7)>i$A
*/ aSxDfYN=R
private void insertSort(int[] data, int start, int len) { PlK3;
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); /lPnf7
} j8PeO&n>
} +{m+aHk
} B.;@i;7L
} k'PvQl"I
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堆排序： VlSM/y5
gy~2LY!}
package org.rut.util.algorithm.support; ^8]7
~x+'-2A46
import org.rut.util.algorithm.SortUtil; b!Nr
8bs'Ek{'o
/** ?z6K/'?
* @author treeroot }bdoJ5
* @since 2006-2-2 $<C",&
* @version 1.0 *//z$la
*/ 5} ur,0{
public class HeapSort implements SortUtil.Sort{ 5K682+^5
Qy}pn=#Q
/* (non-Javadoc) 4GeN<9~YS
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) f&$;iE
*/ &)JoB
public void sort(int[] data) { @,;h!vB*=
MaxHeap h=new MaxHeap(); hA1B C3
h.init(data); yV(9@lj3;
for(int i=0;i h.remove(); r!eW]M
System.arraycopy(h.queue,1,data,0,data.length); xfC$u`e=
} ?m7i7Dz
Kb;Pd!Q
private static class MaxHeap{ X&5N89
ADB)-!$xoi
void init(int[] data){ B]}gfVO
this.queue=new int[data.length+1]; C.LAr~P
for(int i=0;i queue[++size]=data; iC^G^~V+H
fixUp(size); *B{]
} BD}%RTeWKq
} Vm8dX?
D+! S\~u
private int size=0; v*.iNA;&i
z7L+wNYwg
private int[] queue; kTT%< e
:pz@'J
public int get() { ips)-1
return queue[1]; +|8.ymvm
} G|-RscPe
3fXrwmBT8
public void remove() { Q8QB{*4
SortUtil.swap(queue,1,size--); UWS 91GN@
fixDown(1); }lhk;#r
} >=:mtcph
file://fixdown M6qNh`+HO
private void fixDown(int k) { G,^ ?qbHg
int j; +F-Y^):
while ((j = k << 1) <= size) { ^-mWk?>
if (j < size %26amp;%26amp; queue[j] j++; ?[>Y@we
if (queue[k]>queue[j]) file://不用交换 -'d`(G"
break; +%KkzdS'
SortUtil.swap(queue,j,k); Lp@Al#X55
k = j; !TY0;is
} *b0z/6
} z j#<X
private void fixUp(int k) { S Te8*=w
while (k > 1) { F0zaA
int j = k >> 1; YPq:z"`-y4
if (queue[j]>queue[k]) &(Hw:W9
break; /-^J0f+l3
SortUtil.swap(queue,j,k); s"w^E\>6
k = j; GE=S.P;
} @"/H er
} '73}{" '
t]]Ig
} 0:4>rYBC
_K'Y`w']
} \+Y=}P>
;pOV; q3j
SortUtil： pr4y*!|Y$
4oryTckS
package org.rut.util.algorithm; ;!t?*
.'38^
import org.rut.util.algorithm.support.BubbleSort; s~B)xYmyB'
import org.rut.util.algorithm.support.HeapSort; KC2Z@
import org.rut.util.algorithm.support.ImprovedMergeSort; 7P*\|Sxk%
import org.rut.util.algorithm.support.ImprovedQuickSort; dV'^K%#
import org.rut.util.algorithm.support.InsertSort; ?Ov~\[) F
import org.rut.util.algorithm.support.MergeSort; uW/>c$*)
import org.rut.util.algorithm.support.QuickSort; #Hu##x|
import org.rut.util.algorithm.support.SelectionSort; u(f;4`
import org.rut.util.algorithm.support.ShellSort; S# baOO
h4hp5M
/** ZHeq)5C ;f
* @author treeroot q{b-2k
* @since 2006-2-2 V\r{6-%XiW
* @version 1.0 ev+H{5W8
*/ g=qaq
public class SortUtil { Lpkx$QZ
public final static int INSERT = 1; <Uf`'X\e6
public final static int BUBBLE = 2; gYk5}E-
public final static int SELECTION = 3; S'ms>ZENC
public final static int SHELL = 4; L;{{P7
public final static int QUICK = 5; |#yT]0L%pA
public final static int IMPROVED_QUICK = 6; 0nB[Udk?
public final static int MERGE = 7; Ya!e83-r
public final static int IMPROVED_MERGE = 8; *HGhm04F{
public final static int HEAP = 9; L{)t(H>O
CH|cK8q
public static void sort(int[] data) { N1.1
sort(data, IMPROVED_QUICK); " Qyi/r41
} OU#p^5K
private static String[] name={ a'Zw^g
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" A<TYt M
}; B3?rR-2mEE
}m5()@Q}a
private static Sort[] impl=new Sort[]{ cTRtMk%^
new InsertSort(), j)YX=r;xM
new BubbleSort(), +c C. ZOS
new SelectionSort(), ]SPuNBsy)
new ShellSort(), _FcTY5."S
new QuickSort(), }YM\IPsPu
new ImprovedQuickSort(), ]vs}-go
new MergeSort(), c|aX4=Z
new ImprovedMergeSort(), 3^fwDt}
new HeapSort() ^q&|7Ou-
}; t)?K@{ 9
^ACrWk~UY
public static String toString(int algorithm){ Vky]In=
return name[algorithm-1]; N3MPW
} -{9mctt/gE
2e-bt@0t
public static void sort(int[] data, int algorithm) { U/cj_}uX
impl[algorithm-1].sort(data); ST?Rl@4
} zb"4_L@m2
tu* uQ:Ipk
public static interface Sort { Q3^h
public void sort(int[] data); `zw%
} J` gG`?
K{`R`SXD
public static void swap(int[] data, int i, int j) { Tbv w?3
int temp = data; TecMQ0 KD
data = data[j]; hAc|a9 o
data[j] = temp; OgC,oj,!/
} 5p:BHw;%;
} Xy!NBh7I