[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; {Va"o~io
} $YyN-C
int i1=l; 3/w) mY-o
int i2=mid+1; >WsRCBA
for(int cur=l;cur<=r;cur++){ f#W5Nu'*!
if(i1==mid+1) DjX*2O
data[cur]=temp[i2++]; mu1Lgs$;
else if(i2>r) 8>}^W
data[cur]=temp[i1++]; s]X]jfA.
else if(temp[i1] data[cur]=temp[i1++]; P K]$D[a0
else 4ZZ/R?AiK
data[cur]=temp[i2++]; gDmwJr
} C98 Ks
} V0Z\e _I
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} ET&Q}UOE
Pkm3&sW
改进后的归并排序: <u"h'e/oW_
U1>VKP;5Nn
package org.rut.util.algorithm.support; {cNH|
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import org.rut.util.algorithm.SortUtil; Q6?}/p
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/** _TRO2p0
* @author treeroot c==` r C
* @since 2006-2-2 r#K;@wu2
* @version 1.0 |Q'l&Gt6
*/ @Ik@1
public class ImprovedMergeSort implements SortUtil.Sort { u'?yc"d>#
S'I{'jP5
private static final int THRESHOLD = 10; -n-rKN.T
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/* mv1_vF:
* (non-Javadoc) QDRgVP
* ;plzJ6>
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) -1Luyuy/`
*/ 39W6"^q"o
public void sort(int[] data) { (L)tC*Qjc
int[] temp=new int[data.length]; >?$+hZz<
mergeSort(data,temp,0,data.length-1); 0nF>E@j^[
} mxYsP6&
dJhT}"x
private void mergeSort(int[] data, int[] temp, int l, int r) { WheJ 7~
int i, j, k; b ;Vy=f
int mid = (l + r) / 2; *CA7 {2CX
if (l == r) Ba$Ibq,r/
return; #K3A{ jb,
if ((mid - l) >= THRESHOLD) w/KCuW<
mergeSort(data, temp, l, mid); {5f?y\Z
else #Fua^]n
insertSort(data, l, mid - l + 1); }NMkL l]J
if ((r - mid) > THRESHOLD) ys5b34JN
mergeSort(data, temp, mid + 1, r); B}.G(-u?7
else rmCrP(
insertSort(data, mid + 1, r - mid); f3 lKdXnP
;P-xKRU!Xx
for (i = l; i <= mid; i++) { yK +&1U2`
temp = data; yTDlDOmV!
} V}l>p?
for (j = 1; j <= r - mid; j++) { }ST9&wi~
temp[r - j + 1] = data[j + mid]; M'=27!D^
} *3hqz<p4:
int a = temp[l]; 3f`+-&|M
int b = temp[r]; UGy~Ecv
for (i = l, j = r, k = l; k <= r; k++) { glk_*x
if (a < b) { <t{T]i+
data[k] = temp[i++]; v'C`;I
a = temp; !O=J8;oLk
} else { U!"+~d)
data[k] = temp[j--]; U$J l5[`F^
b = temp[j]; nj*B-M\p
} H1PW/AW
} Q?GmSeUi
} !s;+6Sy
~;Ga65_6_
/** aDx{Q&
* @param data H)$-T1Wx4
* @param l Rx$5#K!%M
* @param i ,zy4+GW
*/ N#')Qz:P
private void insertSort(int[] data, int start, int len) { Go}C{(4T
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); I$4GM
} _LV;q! /j
} C:n55BE9
} Q(-:)3g[aL
} Vwp fkD`
[@OXvdTV
堆排序： (hefpqpi
%@Nuzdp
package org.rut.util.algorithm.support; taXS>*|B
Q:\I %o
import org.rut.util.algorithm.SortUtil; ]3_oT^$:
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/** A L#"j62
* @author treeroot <_@ S@t)
* @since 2006-2-2 FAVw80?5k
* @version 1.0 Ed3 *fY
*/ f1;Pzr
public class HeapSort implements SortUtil.Sort{ ,z1X{
O2E6F^.pYw
/* (non-Javadoc) 8CxC`*L(
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) C7`FM@z
*/ r%hnl9
public void sort(int[] data) { U:eahK
MaxHeap h=new MaxHeap(); ?d1H]f<M
h.init(data); T?W`g>yM
for(int i=0;i h.remove(); 3tMFJ ;*`
System.arraycopy(h.queue,1,data,0,data.length); iWu$$IV?-
} |1G/J[E
U}7a;4?
private static class MaxHeap{ " 1YARGu
B*A{@)_
void init(int[] data){ i,BE]w
this.queue=new int[data.length+1]; 83UIH0(
for(int i=0;i queue[++size]=data; $u`y
fixUp(size); 95;q] =U
} ajuwP1I
} 4,kT4_&,
08&DP^NS
private int size=0; N^A&DrMF
/#M|)V*wn
private int[] queue; %ci/(wL
@cNX\$J
public int get() { ]R/VE"-
return queue[1]; 6X5`npf
} -"iGcVV
5QU7!jbI
public void remove() { 2E^zQ>;01
SortUtil.swap(queue,1,size--); a!}.l< )
fixDown(1); wn[q?|1
} k/W$)b:Of`
file://fixdown 6;U]l.
private void fixDown(int k) { 4f<%<Z
int j; \3(d$_:b
while ((j = k << 1) <= size) { {w.rcObIw+
if (j < size %26amp;%26amp; queue[j] j++; iCCY222:
if (queue[k]>queue[j]) file://不用交换 MzRURH,
break; @2-Eky
SortUtil.swap(queue,j,k); PZ~uHX_d>
k = j; *Z=K9y,IC
} #uJGXrGt=
} +Gi~VW.
private void fixUp(int k) { *4Cq,o`o>
while (k > 1) { x|G#oG)_
int j = k >> 1; RuDn1h#u{
if (queue[j]>queue[k]) .WA(X5
break; A{lzQO
SortUtil.swap(queue,j,k); 7nB@U$]-Sz
k = j; |D%i3@P&ZR
} !.mMO_4}
} 6|3$43J,F
~M%r.WFpA
} ,2vPmff
2/f:VB?<T
} gT*0WgB
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SortUtil： VZ{aET!
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package org.rut.util.algorithm; 3!&lio+<
;=1]h&S
import org.rut.util.algorithm.support.BubbleSort; t0p^0
import org.rut.util.algorithm.support.HeapSort; =]yJvn"
import org.rut.util.algorithm.support.ImprovedMergeSort; Q4r)TR,
import org.rut.util.algorithm.support.ImprovedQuickSort; MCU{@\?Xf
import org.rut.util.algorithm.support.InsertSort; Fku9hB
import org.rut.util.algorithm.support.MergeSort; 9:CJl6~N)#
import org.rut.util.algorithm.support.QuickSort; |i5A F\w
import org.rut.util.algorithm.support.SelectionSort; nC^?6il
import org.rut.util.algorithm.support.ShellSort; Ok[y3S
GEXT8f(7
/** g,U~3#
* @author treeroot MjNCn&c
* @since 2006-2-2 SeqnO.\
* @version 1.0 ^?(A|krFg
*/ q05_5
public class SortUtil { b5_(Fv
public final static int INSERT = 1; 8 ZD1}58U4
public final static int BUBBLE = 2; g![]R-$
public final static int SELECTION = 3; AxLnF(eG
public final static int SHELL = 4; 4;WeB
public final static int QUICK = 5; u&1n~t`
public final static int IMPROVED_QUICK = 6; Udv5Y
public final static int MERGE = 7; 5FcKY_
public final static int IMPROVED_MERGE = 8; rVq=,>M9
public final static int HEAP = 9; T1c2J,+}R
mw";l$Aq}
public static void sort(int[] data) { C,+6g/{
sort(data, IMPROVED_QUICK); nJ |O,*`O
} @$z/=gsy
private static String[] name={ [TvH7ott'1
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" X*VHi
}; R:kNAtK
Y15KaoK?
private static Sort[] impl=new Sort[]{ pUki!TA
new InsertSort(), h.FC:ym"
new BubbleSort(), n}PK0
new SelectionSort(), ivsp):W
new ShellSort(), }2-<}m9}
new QuickSort(), {@1.2AWg
new ImprovedQuickSort(), x&7%U
new MergeSort(), LS@[O])$'
new ImprovedMergeSort(), 9B")/Hz_
new HeapSort() qN}kDT
}; ~>zml1aJ6
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public static String toString(int algorithm){ +,<\LIP
return name[algorithm-1]; tmiRv.Mhn<
} "I?sz)pxG
1XQJ#J1/
public static void sort(int[] data, int algorithm) { ]8KAat~J
impl[algorithm-1].sort(data); xnWCio>M
} Xm&L@2V
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public static interface Sort { >HO{gaRM
public void sort(int[] data); Y ::\;s
} XbdoTriE
|9ro&KA
public static void swap(int[] data, int i, int j) { YJ_`[LnL
int temp = data; j|!.K|9B
data = data[j]; JCZ"#8M3
data[j] = temp; &x19]?D"+
} '{WYho!
} 5"xZ'M~=