[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; mu{%%b7|^
} X2@o"xU
int i1=l; IB!Wrnj?
int i2=mid+1; 2WUBJ-qnuT
for(int cur=l;cur<=r;cur++){ |%RFXkHS
if(i1==mid+1) GU[Cq=k
data[cur]=temp[i2++]; `=KrV#/758
else if(i2>r) zi-+@9T
data[cur]=temp[i1++]; 0a'@J~v!
else if(temp[i1] data[cur]=temp[i1++]; ~!&[;EM<bm
else A+F-r_]}db
data[cur]=temp[i2++]; .9^;? Ts
} (B$FX<K3
} *e>:K$r
xrX("ili
} FBY~Z$o0.
.<NXk"\!y
改进后的归并排序: 2~`dV_
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package org.rut.util.algorithm.support; Y4714
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import org.rut.util.algorithm.SortUtil; H~G=0_S
CqX%V":2
/** aZ0H)
* @author treeroot \!^o<$s.G
* @since 2006-2-2 Aj`4uFhiL
* @version 1.0 C|lMXp\*
*/ unX^MPpw
public class ImprovedMergeSort implements SortUtil.Sort { A&M/W'$s
>u/yp[Ky
private static final int THRESHOLD = 10; (w^&NU'e
`q@~78`
/* EV(/@kN2
* (non-Javadoc) A!Yqj~
* _x'StD
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) +nZG!nP
*/ #-f^;=7
public void sort(int[] data) { 5-3gsy/Mo
int[] temp=new int[data.length]; ^7''x,I
mergeSort(data,temp,0,data.length-1); .XE]vo
} ?#[K&$}
% (.PRRI
private void mergeSort(int[] data, int[] temp, int l, int r) { 3PEs$m9e
int i, j, k; }GC{~ SZ4
int mid = (l + r) / 2; aLq;a
if (l == r) 0=5i\*5 p
return; B~ez>/H^
if ((mid - l) >= THRESHOLD) 'H9~rq7
mergeSort(data, temp, l, mid); :Aa^afjJw
else lxz %bC@
insertSort(data, l, mid - l + 1); nSC>x:jY5/
if ((r - mid) > THRESHOLD) ri^yal<'
mergeSort(data, temp, mid + 1, r); 8xv\Zj+
else o{hKt?
insertSort(data, mid + 1, r - mid); i:$g1
.)GVb<w
for (i = l; i <= mid; i++) { >mV""?r]
temp = data; SeTU`WLEm
} y5ExEXa
for (j = 1; j <= r - mid; j++) { <?g{Rn
temp[r - j + 1] = data[j + mid]; Rq9gtx8,=
} Y5opZG
int a = temp[l]; 3TtW2h>M
int b = temp[r]; h P1|l
for (i = l, j = r, k = l; k <= r; k++) { #.='dSj
if (a < b) { gi6_la+
data[k] = temp[i++]; K%k,-
a = temp; 4<Y?#bm'
} else { gf=*m"5
data[k] = temp[j--]; Pn#Lymxh_a
b = temp[j]; pZjFpd|
} [~o3S$C&7
} -+=8&Wa
} Ygl!fC 4b
{HU48v"W
/** Cnr48ukq
* @param data : L>d]Hn
* @param l `otQ'e~+t
* @param i *k}d@j,*"
*/ ~h/U ;Da
private void insertSort(int[] data, int start, int len) { UGMdWq
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 0#7dm9
} ex1ecPpN
} L}mhMxOTi
} x9e 9$ww}
} vKC>t95
4kM<L}J#
堆排序： 'yNp J'
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package org.rut.util.algorithm.support; O+N-x8W{
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import org.rut.util.algorithm.SortUtil; 0d2%CsMS"D
tFQFpbI
/** $3ILVT
* @author treeroot KOQTvJ_#
* @since 2006-2-2 Bz{ g4!ku
* @version 1.0 /b|sv$BN
*/ xpk|?/6
public class HeapSort implements SortUtil.Sort{ {;zPW!G
4l*&3Ar
/* (non-Javadoc) v+G:,Tc"
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 2$91+N*w9
*/ f/x "yUq
public void sort(int[] data) { :]s] =q&]
MaxHeap h=new MaxHeap(); {JgN^R<5<f
h.init(data); OOCeZ3yF(
for(int i=0;i h.remove(); kWd'gftQ
System.arraycopy(h.queue,1,data,0,data.length); t/Fe"T[,V
} UU;:x"4
F*4+7$E0B
private static class MaxHeap{ E'G>'cW;x
=-qsz^^a-
void init(int[] data){ v`&Z.9!Tz^
this.queue=new int[data.length+1]; ob{pQx7
for(int i=0;i queue[++size]=data; ^XM;D/Gp~
fixUp(size); J (h>
} 1GdD
} Q Y'-]
I,eyL$x
private int size=0; DtZm|~)a
q1y4B`
private int[] queue; d eg>m?Y
P]B#i1
public int get() { Os{qpR^<I:
return queue[1]; hgK=fHJk
} 4B`Rz1QBy
MQ44uHJ
public void remove() { P `"7m-
SortUtil.swap(queue,1,size--); kR|y0V {K*
fixDown(1); eW0=m:6
} /Hmo!"W`
file://fixdown B]7jg9/
private void fixDown(int k) { Kxn7sL$]=F
int j; o3=kF
while ((j = k << 1) <= size) { j,XKu5w)Oi
if (j < size %26amp;%26amp; queue[j] j++; {rZ"cUm
if (queue[k]>queue[j]) file://不用交换 WIm7p1U#V
break; +QX>:z
SortUtil.swap(queue,j,k); y~7lug
k = j; @nu/0+8h{
} TXcKuo=
} l'QR2r7&.
private void fixUp(int k) { p/h&_^EXU
while (k > 1) { UD{/L"GG
int j = k >> 1; OX4D'
if (queue[j]>queue[k]) )*ckJK
break; (%yc5+f!
SortUtil.swap(queue,j,k); 8`2<g0V2
k = j; ,G|aLBn
} 5;8B!%b
} \K~fRUo]=c
rw[{@|)'z
} aroVyUs3j
9<h]OXv
} ds;cfj[
nVn|$ "r
SortUtil： ywynx<Wg
Kt,ynA
package org.rut.util.algorithm; 34wM%@D*c
dP7Vsa+
import org.rut.util.algorithm.support.BubbleSort; ?4[Oh/]R
import org.rut.util.algorithm.support.HeapSort; SiqX1P
import org.rut.util.algorithm.support.ImprovedMergeSort; }BdVD t
import org.rut.util.algorithm.support.ImprovedQuickSort; a,*p_:~i
import org.rut.util.algorithm.support.InsertSort; %m{.l4/!O
import org.rut.util.algorithm.support.MergeSort; 1"&;1Ts
import org.rut.util.algorithm.support.QuickSort; 6$s0-{^
import org.rut.util.algorithm.support.SelectionSort; br;H8-
import org.rut.util.algorithm.support.ShellSort; |\|)j>[i
b>=Wq
/** >q@Sd
* @author treeroot MiH}VfI
* @since 2006-2-2 6w"( y~c1
* @version 1.0 @D~+D@i$TW
*/ 'nWs0iH.
public class SortUtil { 9/1+BQ
public final static int INSERT = 1; p^igscPF6
public final static int BUBBLE = 2; $@_t5?n``F
public final static int SELECTION = 3; <2O7R}j7v
public final static int SHELL = 4; KBw9(
public final static int QUICK = 5; r<X4ER
public final static int IMPROVED_QUICK = 6; %aH$Tb%`hc
public final static int MERGE = 7; guOSO@
public final static int IMPROVED_MERGE = 8; MziZN^(
public final static int HEAP = 9; ,{{#a*nd
QhXC>)PW
public static void sort(int[] data) { H8$<HhuZM
sort(data, IMPROVED_QUICK); S1^nC tSF
} /ggkb8<3
private static String[] name={ Bug}^t{M
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" YYE8/\+B.
}; Z@,PZ
WVWS7N\
private static Sort[] impl=new Sort[]{ n(1wdlEp
new InsertSort(), 3p3WDL7
new BubbleSort(), {[,Wn:
new SelectionSort(), zn V1kqGU
new ShellSort(), i&pJg1
new QuickSort(), 6b]1d04hT
new ImprovedQuickSort(), ZEj!jWP2m
new MergeSort(), /MKNv'5&!%
new ImprovedMergeSort(), 0SMQDs5j
new HeapSort() w3=)S\
}; FL`1yD^2
Xqg.kX
public static String toString(int algorithm){ 4W!\4Va
return name[algorithm-1]; BjyXQ9D
} -jxWlO
* {gxI<
public static void sort(int[] data, int algorithm) { dY/u<4
impl[algorithm-1].sort(data); +[whh
} w53z*l>ek
}F{C= l2
public static interface Sort { G(As%r]
public void sort(int[] data); '<%Nw-
} "*w)puD
j,=*WG
public static void swap(int[] data, int i, int j) { ?""\
int temp = data; eu}Fd@GO
data = data[j]; B;GxfYj
data[j] = temp; L19MP
} x2C/L
} 2y+70(E1