[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; #=F{G4d)!=
} sr<\fW
int i1=l; vcP_gJz
int i2=mid+1; y8v0>V0)
for(int cur=l;cur<=r;cur++){ )L"J?wTe
if(i1==mid+1) [XP\WG>s
data[cur]=temp[i2++]; k/Q8:qA
else if(i2>r) _( QW2m?K
data[cur]=temp[i1++]; &o`LT|*m
else if(temp[i1] data[cur]=temp[i1++]; ndvt $*
else LO%OH u}]
data[cur]=temp[i2++]; a{.-qp
} \rH0=~F-P
} HeHo?<>|d
@[TSJi
} !]8QOn7=
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改进后的归并排序: q9Lq+4\
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package org.rut.util.algorithm.support; Saks~m7,
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import org.rut.util.algorithm.SortUtil; Q6r
WvcPOt8Bp>
/** :;&3"-
* @author treeroot tR?)C=4,
* @since 2006-2-2 {CgF{7`
* @version 1.0 U6YQ*%mZ_
*/ \.=,}sV2Z
public class ImprovedMergeSort implements SortUtil.Sort { L~Xzo
:M@#.
private static final int THRESHOLD = 10; X09i+/ICK
<4"Bb_U
/* LiEDTXRz
* (non-Javadoc) W;F=7[h
* J2!)%mF$
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) c <X( S
*/ [3v&j_
public void sort(int[] data) { -Y>QKS
int[] temp=new int[data.length]; .6iJ:A6T
mergeSort(data,temp,0,data.length-1); 6MQyr2c
} Z:VT%-
h-%RSei5
private void mergeSort(int[] data, int[] temp, int l, int r) { /Em6+DN>
int i, j, k; wf~n>e^e
int mid = (l + r) / 2; 58PL@H~@0
if (l == r) D!V*H?;U
return; wHs4~"EY9
if ((mid - l) >= THRESHOLD) V"A*B
mergeSort(data, temp, l, mid); %)y-BdSp.
else z[]8"C=
insertSort(data, l, mid - l + 1); lh;;%@1DM
if ((r - mid) > THRESHOLD) JiX-t\V~
mergeSort(data, temp, mid + 1, r); odTIz{9qG
else 9y;zk$O8
insertSort(data, mid + 1, r - mid); BHS8MV L@
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for (i = l; i <= mid; i++) { s<8|_Dt
temp = data; Jwbb>mB!
} 1sXVuto
for (j = 1; j <= r - mid; j++) { Az6tu <
temp[r - j + 1] = data[j + mid]; ohPDknHp
} bO }9/Ay
int a = temp[l]; rG'W#!^*
int b = temp[r]; X>eFGCz}I
for (i = l, j = r, k = l; k <= r; k++) { 0G8zFe*p
if (a < b) { H|<Zm:.%$
data[k] = temp[i++]; @zig{b8
a = temp; BBj>ML\X
} else { #$u7:p [t
data[k] = temp[j--]; v3r<kNW_
b = temp[j]; IGI$,C
} ;2547b[]
} j$r2=~1
} 8/W2;>?wKc
!InC8+be
/** 77%I%<#
* @param data %"AB\lL.
* @param l :Gf
* @param i KOhIk*AC'
*/ ?rQIUP{D7
private void insertSort(int[] data, int start, int len) { !Gh*Vtd8-
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); +\25ynM
} 6f;20dn6
} m@g9+7
} EskD)Sl
} OTWp,$YA=
@}_Wl<kn
堆排序： +.66Ky`|[
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package org.rut.util.algorithm.support; Z (C0+A\
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import org.rut.util.algorithm.SortUtil; _kUtj(re
t:tIzFNv
/** \T^ptj(0
* @author treeroot Z<[:v2
* @since 2006-2-2 e^orqw/I
* @version 1.0 oN=>U"<\1
*/ bA/'IF+
public class HeapSort implements SortUtil.Sort{ Z4D[nPm$
:+meaxbu
/* (non-Javadoc) 4&G #Bi
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ^NFL3v8
*/ ?l^NKbw
public void sort(int[] data) { *Jg&:(#}<J
MaxHeap h=new MaxHeap(); ;AJ6I*O@+
h.init(data); 1( rN
for(int i=0;i h.remove(); |L(h+/>aWX
System.arraycopy(h.queue,1,data,0,data.length); @8lT*O2j
} 9rgvwko
X1^Q1?0
private static class MaxHeap{ wfQImCZ>l
k;l^y%tzp
void init(int[] data){ 1i@a? 27|
this.queue=new int[data.length+1]; :O]US)VSj
for(int i=0;i queue[++size]=data; aJ J63aJ
fixUp(size); f;obK~b[
} 4,?WNPqo
} q;QE(}.g
& DhdB0Hjf
private int size=0; .T#}3C/
kp^q}iS
private int[] queue; 7 /XfPF
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public int get() { u4DrZ-v
return queue[1]; R^@
} ?$ M:4mX
H}gp`YW:4
public void remove() { <AU0ir
SortUtil.swap(queue,1,size--); b8|<O:]Hp
fixDown(1); ,z`* 1b8
} Xx ou1l!
file://fixdown \hg%J/
private void fixDown(int k) { zB'_YwW
int j; Koc5~qUY]
while ((j = k << 1) <= size) { Dfy=$:Q
if (j < size %26amp;%26amp; queue[j] j++; *Nur>11D
if (queue[k]>queue[j]) file://不用交换 ,n&Lp
break; Fmzkbt~oe
SortUtil.swap(queue,j,k); XUTsW,WC
k = j; o&>aYlXd
} 06[HE7
} ^m-w@0^z
private void fixUp(int k) { !HKW_m^3J
while (k > 1) { UvuAN:'
int j = k >> 1; X u2+TK
if (queue[j]>queue[k]) OtoG,~?
break; 'ji|'x T
SortUtil.swap(queue,j,k); 3(_:"?xA
k = j; e//jd&G
} Gyb|{G_
} C0CJ;
D&G^|: G
} -x-EU#.G
C@u}tH )
} b;5 M$
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SortUtil： -Sa-eWP
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package org.rut.util.algorithm; XHh*6Yt_ (
5aNvGI1
import org.rut.util.algorithm.support.BubbleSort; mQ2=t%
import org.rut.util.algorithm.support.HeapSort; ?nZe.z-%6
import org.rut.util.algorithm.support.ImprovedMergeSort; 9*VL|
import org.rut.util.algorithm.support.ImprovedQuickSort; "G@(Cb*+T
import org.rut.util.algorithm.support.InsertSort; Hp[i8PJ
import org.rut.util.algorithm.support.MergeSort; ZtY?X- 4_
import org.rut.util.algorithm.support.QuickSort; d=dHY(ms]
import org.rut.util.algorithm.support.SelectionSort; 8\p"V.o>
import org.rut.util.algorithm.support.ShellSort; HQMug
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/** (6&"(}Pai
* @author treeroot >96+s)T%;
* @since 2006-2-2 #"fn;
* @version 1.0 $@84nR{>
*/ $GYy[8{:V
public class SortUtil { HhwAzk/G~
public final static int INSERT = 1; o>|DT(Ib
public final static int BUBBLE = 2; lv+: `
public final static int SELECTION = 3; XW~a4If
public final static int SHELL = 4; rU|?3x
public final static int QUICK = 5; zR)/h
public final static int IMPROVED_QUICK = 6; -Ua&/Yd/}
public final static int MERGE = 7; >ByqM{?
public final static int IMPROVED_MERGE = 8; |XV`A)=f
public final static int HEAP = 9; Z+=-)&L
$LiBJ~vV<
public static void sort(int[] data) { M>xT\
sort(data, IMPROVED_QUICK); #/HZ[Vw
} Q:Ma3El\
private static String[] name={ tJmy}.t1
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" btBu[;
}; t%Bh'HkG
$-]I?cWlQ
private static Sort[] impl=new Sort[]{ uPE Ab2u="
new InsertSort(), p{+F{e
new BubbleSort(), _-2ntO<E
new SelectionSort(), 5&xbGEP$
new ShellSort(), ZD4aT1|Q7
new QuickSort(), x+b.9f4xJ
new ImprovedQuickSort(), ~y"OyOi&
new MergeSort(), `G%h=rr^c
new ImprovedMergeSort(), %evtIU<h
new HeapSort() kSEgq<i!
}; ct<XKqbI
m#4h5_N
public static String toString(int algorithm){ iJ @p:
return name[algorithm-1]; ,C|{_4
} z[K)0@8 6
/IF?|71,m
public static void sort(int[] data, int algorithm) { X*9-P9x(6
impl[algorithm-1].sort(data); >pe!T aBN
} n)\(\V7
EAy@kzY?
public static interface Sort { l dp$jrNLr
public void sort(int[] data); fIJX5)D
} |~&cTDd
Q<KF<K'0hg
public static void swap(int[] data, int i, int j) { /U-+ClZi@
int temp = data; &3 Ki
data = data[j]; <$d2m6J
data[j] = temp; v6Wz:|G/u
} <":83RCS
} z, FPhbFn