[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; l29AC}^
} ]?jmRk^.
int i1=l; Gv(n2r
int i2=mid+1; T(qHi?Y
for(int cur=l;cur<=r;cur++){ (ke<^sv7!
if(i1==mid+1) b]8\%=d
data[cur]=temp[i2++]; I= z+`o8
else if(i2>r) .lcgM
data[cur]=temp[i1++]; jd+HIR
else if(temp[i1] data[cur]=temp[i1++]; !<-+}X+o8$
else x||b:2
data[cur]=temp[i2++]; lnxA/[`a
} Oo\~'I
} giN(wPgYP
LR17ilaa'
} @[rlwwG,
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改进后的归并排序: mL,{ZL ^
l4^8$@;s
package org.rut.util.algorithm.support; ,6U=F#z
"yXqf%CGE
import org.rut.util.algorithm.SortUtil; Y}x_ud,
zWdz9;=_
/** m]\d9%-AT&
* @author treeroot OL&VisJ{75
* @since 2006-2-2 =gB{(
* @version 1.0 G~4|]^`g
*/ ht5:kt`F
public class ImprovedMergeSort implements SortUtil.Sort { 7nPm{=BG
}M\G
private static final int THRESHOLD = 10; wK%x|%R[
'Cywn^Ym#
/* %__.-;)o
* (non-Javadoc) abV,]x&.0
* 7aNoqS+
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) .aIFm5N3?
*/ T~N877
public void sort(int[] data) { %x$mAOUv
int[] temp=new int[data.length]; 0I.!
mergeSort(data,temp,0,data.length-1); *\wf(o>Q
} K;f=l5
&-Z#+>=H(
private void mergeSort(int[] data, int[] temp, int l, int r) { "\1V^2kMr
int i, j, k; >LB x\/
int mid = (l + r) / 2; h6Hop mWVx
if (l == r) odq3@ ziO
return; l_=kW!l
if ((mid - l) >= THRESHOLD) gem+$TFq
mergeSort(data, temp, l, mid); n<sA?T
else h1?.x
insertSort(data, l, mid - l + 1); -IS?8\Q<
if ((r - mid) > THRESHOLD) n~&e>_;(.
mergeSort(data, temp, mid + 1, r); \cq.M/p
else q/YO5>s15
insertSort(data, mid + 1, r - mid); .rbKvd?-}
=~QC)y_
for (i = l; i <= mid; i++) { hB*3Py27L
temp = data; }Qvoms<k
} wsCT9&p
for (j = 1; j <= r - mid; j++) { ok9G9|HA
temp[r - j + 1] = data[j + mid]; %6<2~
} *FoPs
int a = temp[l]; j(=zc6m
int b = temp[r]; TsZX'Yn
for (i = l, j = r, k = l; k <= r; k++) { @Cd}1OT)
if (a < b) { kC6s_k
data[k] = temp[i++]; qfEB VS(
a = temp; N6-bUM6%I
} else { E;x~[MA
data[k] = temp[j--]; K,GX5c5
b = temp[j]; ;%aWA
} ?"qS%EH
} _^0)T@
} s=|&NlO$
T]J#>LBd
/** zzBqb\Ky
* @param data JYWc3o6
* @param l ^-7{{/
* @param i H~"XlP
*/ / k8;k56
private void insertSort(int[] data, int start, int len) { Y3wL EG%,:
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); rO{"jJ
} x?Oc<CQ-2
} (G6N@>V(`
} TMQu'<?V
} O/R>&8R$
y0XI?Wr
堆排序： ]^\+B4
$JXQn
package org.rut.util.algorithm.support; mJ5LRpXN
h?:Y\DlU'
import org.rut.util.algorithm.SortUtil; u~d&<_Z
DK;/eZe
/** 0CO6-&F9n
* @author treeroot TS<uBX
* @since 2006-2-2 IyA8+N y
* @version 1.0 9Fh(tzz
*/ YPq`su7m9
public class HeapSort implements SortUtil.Sort{ P1l@K2r
}UWRH.;v
/* (non-Javadoc) xR;-qSl7Ms
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) #TSLgV'U
*/ W(tXq
public void sort(int[] data) { 0Z{(,GU
MaxHeap h=new MaxHeap(); )p;gm`42oY
h.init(data); -0doL^A
for(int i=0;i h.remove(); .el_pg
System.arraycopy(h.queue,1,data,0,data.length); Rx=pk
} FR@ dBcJUU
B1Iq:5nmoS
private static class MaxHeap{ {N,w5!cP
uy;3s=03^
void init(int[] data){ D r$N{d
this.queue=new int[data.length+1]; 5OUe|mS
for(int i=0;i queue[++size]=data; MPd#C*c
fixUp(size); ]H|1quT
} br'/>Un"
} <!|2Ru
GS3ydN<v
private int size=0; 2WOdTM{u
7iKbd
private int[] queue; XfT6,h7vFL
L3~E*\cV
public int get() { _n{6/
return queue[1]; Cst>'g-yB
} }J$PO*Q@'
QrPWS-3~!
public void remove() { OkO"t
SortUtil.swap(queue,1,size--); fwQ%mU+
fixDown(1); )V}u1C-N
} #UJ@P Dwil
file://fixdown EH$wWl^
private void fixDown(int k) { i,,>@R
int j; z[ ;{p.W
while ((j = k << 1) <= size) { . yu
if (j < size %26amp;%26amp; queue[j] j++; LVLh&9
if (queue[k]>queue[j]) file://不用交换 j{P,(-
break; WiviH#hF
SortUtil.swap(queue,j,k); Ahq^dx#o
k = j; #PA"l`"
} 6CU8BDN
} aTs_5q
private void fixUp(int k) { ^HL#)fK2I
while (k > 1) { XfsCu>
int j = k >> 1; X>|.BvY|
if (queue[j]>queue[k]) ]3QQ"HLcp
break; _L!"3
SortUtil.swap(queue,j,k); D\V}Eo';6
k = j; 73.o{V
} 6v1#i
} %9NGVC
g}qK$>EPS
} vFCp=8h
oa1a5+A
} ,?#-1uIGL>
+dh]k=6
SortUtil： y_QxJ~6t
1=(i{D~
package org.rut.util.algorithm; Qw5M\
C.(ZXU7
import org.rut.util.algorithm.support.BubbleSort; `?6m0|\@
import org.rut.util.algorithm.support.HeapSort; L6A6|+H%E
import org.rut.util.algorithm.support.ImprovedMergeSort; sq)Nn&5A
import org.rut.util.algorithm.support.ImprovedQuickSort; sX_^H%fd
import org.rut.util.algorithm.support.InsertSort; !P92e1
import org.rut.util.algorithm.support.MergeSort; {fN_itn
import org.rut.util.algorithm.support.QuickSort; TPEZ"%=Hg
import org.rut.util.algorithm.support.SelectionSort; JrL/LGY
import org.rut.util.algorithm.support.ShellSort; "iZ-AG!C
?n@PZL= ]
/** BS|-E6E<
* @author treeroot dadMwe_l0
* @since 2006-2-2 tc,7yo\".
* @version 1.0 QX]tD4OH
*/ (I~,&aBr
public class SortUtil { n`:l`n>N$
public final static int INSERT = 1; \AK|~:\]
public final static int BUBBLE = 2; "?9fL#8f*!
public final static int SELECTION = 3; $qrr]U
public final static int SHELL = 4; sy@k3wQ
public final static int QUICK = 5; bo -Gh`
public final static int IMPROVED_QUICK = 6; x)*/3[
public final static int MERGE = 7; =k/n
public final static int IMPROVED_MERGE = 8; #/jHnRrQ
public final static int HEAP = 9; q2<J`G(tZ
bL[PNUG
public static void sort(int[] data) { Iw<c 9w8
sort(data, IMPROVED_QUICK); [a |fm*B!
} I] "$h]T
private static String[] name={ RY~)MS _C
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" B6pz1P?e}
}; TwhK>HN
8\V-aow
private static Sort[] impl=new Sort[]{ mpF_+Mn
new InsertSort(), *nC,=2
new BubbleSort(), h?1pGz)[C
new SelectionSort(), lb6s3b
new ShellSort(), oF6MV&q/
new QuickSort(), D&^:hs@
new ImprovedQuickSort(), RYhdf
new MergeSort(), UQdQtj1'
new ImprovedMergeSort(), 88*RlxU
new HeapSort() `i:0dVs
}; 7lj-Z~1
}mGD`5[`
public static String toString(int algorithm){ aKUr":z
return name[algorithm-1]; |zT0g]WH
} i-=ff
-$kJERvy
public static void sort(int[] data, int algorithm) { h9-Ky@X`
impl[algorithm-1].sort(data); y^Jv?`jw
} jbGH3 L
Kk(ucO
public static interface Sort { cU6#^PFu
public void sort(int[] data); QO>*3,(H,q
} 1c4%g-]7
Iw:("A&~
public static void swap(int[] data, int i, int j) { v}Nx*%
int temp = data; $^XPk#$m
data = data[j]; $P@cS1sB
data[j] = temp; }2.}fHb2
} ,Df36-74v5
} .#eXNyCe