[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; rQ_!/J[9
} ?{@UB*
int i1=l; d0@&2hO
int i2=mid+1; =}bDT2Nb
for(int cur=l;cur<=r;cur++){ 9Ai e$=
if(i1==mid+1) 3ID1>
data[cur]=temp[i2++]; R)p+#F(s
else if(i2>r) PP2>v|
data[cur]=temp[i1++]; f)~j'e
else if(temp[i1] data[cur]=temp[i1++]; 9-Y.8:A`
else 3M5+!H
data[cur]=temp[i2++]; K>!+5A$6i
} NJ^H"FLS:
} TLBIM
+pGkeZX
} K?M{=$N
17-D\ +}
改进后的归并排序: C-vFl[@a0
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package org.rut.util.algorithm.support; -tQi~Y[]
+#|| w9p
import org.rut.util.algorithm.SortUtil; j-H2h
a&'!g)d
/** q<5AB{Oj?
* @author treeroot nnv&~C
* @since 2006-2-2 k9V#=,K0
* @version 1.0 K,ccM[hu|
*/ 8'niew 5d
public class ImprovedMergeSort implements SortUtil.Sort { Ia>07av
b7thu5
private static final int THRESHOLD = 10; |OgtAI9
>I9w|zFA
/* *,hg+?lZ
* (non-Javadoc) `R9}.?7
* q+KGQ*
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 2Hh5gD|>
*/ oS2L"#
public void sort(int[] data) { j %3wD2 l
int[] temp=new int[data.length]; s{"}!y=]
mergeSort(data,temp,0,data.length-1); td}%reH
} LSX;|#AI
fFr[ &\[
private void mergeSort(int[] data, int[] temp, int l, int r) { ?h7,q*rxk
int i, j, k; X&s@S5=r]
int mid = (l + r) / 2; dX720/R
if (l == r) y4jJ&
return; RM5$O+"
if ((mid - l) >= THRESHOLD) IB'gY0*
mergeSort(data, temp, l, mid); |a>W9Ym
else +7`7cOqXg
insertSort(data, l, mid - l + 1); '@jP$6T&
if ((r - mid) > THRESHOLD) a9+l:c@
mergeSort(data, temp, mid + 1, r); <Mt>v2a3Y
else r5k{mV+
insertSort(data, mid + 1, r - mid); EFZ]|Z7
L0sb[:'luz
for (i = l; i <= mid; i++) { ,aA%,C.0U
temp = data; ZxDh94w/
} B7y^)/
for (j = 1; j <= r - mid; j++) { oqXs2F
temp[r - j + 1] = data[j + mid]; <WWn1k_
} [EdX6
int a = temp[l]; +!@@55I-
int b = temp[r]; GLS`1!
for (i = l, j = r, k = l; k <= r; k++) { M5C%(sQ$
if (a < b) { '}F=U(!
data[k] = temp[i++]; j9voeV|7
a = temp; 3Z taj^v
} else { )2&U Rt.
data[k] = temp[j--]; ['`Vg=O.{
b = temp[j]; h'wI
} JBvMe H5
} km 0LLYG
} =!V-V}KK-
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/** " M+g=
* @param data 'yIz<o
* @param l 8<2 [ F
* @param i B%L dH
*/ Ub"6OT1tl
private void insertSort(int[] data, int start, int len) { 7uI~Xo?N
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); W%&[gDp
} RTXl3 jq
} 4ayZ.`aK
} [f8mh88r
} ]:K[{3iM
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堆排序： DJ]GM|?
]b&"](A
package org.rut.util.algorithm.support; vz87]InI
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import org.rut.util.algorithm.SortUtil; axpn*(yE
,cF $_7M
/** FN>ns,
* @author treeroot C7hJE-
* @since 2006-2-2 >EJ`Z7E6
* @version 1.0 "QV?C
*/ ZD`9Ez)5
public class HeapSort implements SortUtil.Sort{ (Y[q2b
;_TPJy
/* (non-Javadoc) IW~q,X+`V
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) UpoTXAD}k
*/ a6/$}lCq
public void sort(int[] data) { v"~0 3-SX
MaxHeap h=new MaxHeap(); C8oAl3d+h
h.init(data); 5(qc_~p^
for(int i=0;i h.remove(); B=,j$uH
System.arraycopy(h.queue,1,data,0,data.length); .!><qVg
} V=+wsc
k%-S7iQ
private static class MaxHeap{ )e|n7|} $
w~lxWgaY7
void init(int[] data){ aR@s. ll
this.queue=new int[data.length+1]; o;^k"bo6
for(int i=0;i queue[++size]=data; aN,.pLe;
fixUp(size); ;q;}2
} K7jz*|2
} j56Dt_
`yXJaTbo
private int size=0; J;mvD^`g
j_#oP
private int[] queue; g"P!KPrf1p
4Ww.CkRG
public int get() { j3kcNb
return queue[1]; 4w)aAXK
} Q!&@aKl
$,&3:ke1
public void remove() { nN|1cJ'.Fk
SortUtil.swap(queue,1,size--); V]fsjpvlmr
fixDown(1); )RZ:\:c
} .~L^h/)Gjy
file://fixdown 'UN 'gXny
private void fixDown(int k) { 08pG)_L
int j; ?A\[EI^
while ((j = k << 1) <= size) { O.+02C_*
if (j < size %26amp;%26amp; queue[j] j++; 8h=Rfa9
if (queue[k]>queue[j]) file://不用交换 u,f$cR
break; 9-6E(D-ux
SortUtil.swap(queue,j,k); rf[w&~R
k = j; NMCMY<o
} \'}? j-8
} Pd^v-}[
private void fixUp(int k) { $SAk|
while (k > 1) { Y{v\m(D
int j = k >> 1; ~6HaZlBB
if (queue[j]>queue[k]) to%n2^^K
break; y G{;kJ P
SortUtil.swap(queue,j,k); 2dpTU=K4
k = j; 8`?vWJS
} `~S; UG
} ~,: FZ1wh
J-3%.fX,
} )c"m:3D@
_R] qoUw;
} >qT4'1S*g
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SortUtil： ,FP<# 0F*a
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package org.rut.util.algorithm; <T0+-]i
`dpm{sn
import org.rut.util.algorithm.support.BubbleSort; U`HSq=J
import org.rut.util.algorithm.support.HeapSort; :t#N.[=&#
import org.rut.util.algorithm.support.ImprovedMergeSort; 0**.:K<i
import org.rut.util.algorithm.support.ImprovedQuickSort; \A'tV/YAd
import org.rut.util.algorithm.support.InsertSort; }-8ZSWog6f
import org.rut.util.algorithm.support.MergeSort; WXgGB[x
import org.rut.util.algorithm.support.QuickSort; bf2B
import org.rut.util.algorithm.support.SelectionSort; O*%@(w6
import org.rut.util.algorithm.support.ShellSort; ',g'Tl^E
<`/22S"
/** 'A}@XGE:p
* @author treeroot Sph:OX8
* @since 2006-2-2 sERm+x<
* @version 1.0 c&rS7%
*/ VBe.&b8
public class SortUtil { xD|CQo}:
public final static int INSERT = 1; d4]9oi{}
public final static int BUBBLE = 2; kTQvMa-X9D
public final static int SELECTION = 3; OU /=wpt
public final static int SHELL = 4; k:JlC(^h
public final static int QUICK = 5; cIJqF.k
public final static int IMPROVED_QUICK = 6; ~$FgiW
public final static int MERGE = 7; Z91GM1lrf8
public final static int IMPROVED_MERGE = 8; u#&ZD|
public final static int HEAP = 9; =,4iMENm!
X":T>)J-
public static void sort(int[] data) { I6B`G Im5
sort(data, IMPROVED_QUICK); 8U$(9X
} ]g0h7q)79
private static String[] name={ (aQNe{D#
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" }+wvZq +c
}; -ghmLMS%t
SJXA
private static Sort[] impl=new Sort[]{ w$2Z7S
new InsertSort(), =bwuLno>
new BubbleSort(), =OUms@xcE
new SelectionSort(), n(}zq
new ShellSort(), XX:?7:j}[8
new QuickSort(), f'>270pH
new ImprovedQuickSort(), 8M DX()Bm
new MergeSort(), ~s[St0
new ImprovedMergeSort(), /l)|B
new HeapSort() pm 4"Q!K
}; c%bGVRhE
D')m8:>
public static String toString(int algorithm){ 4*vV9*'!
return name[algorithm-1]; x%WL!Lo
} \j$q';9p
p!wx10b
public static void sort(int[] data, int algorithm) { C72!::o
impl[algorithm-1].sort(data); `c)//o
} i7UE9Nyl*
>cE@m=[
public static interface Sort { .e,(}_[[<
public void sort(int[] data); A3#^R%2)W
} bx5f\)
3r[}'ba\
public static void swap(int[] data, int i, int j) { H}[kit*9
int temp = data; 6hvmp
data = data[j]; 42Vz6 k:
data[j] = temp; <.HDv:
} q|N/vkqPz
} !jIpgs5