[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; |jH Yf42Q
} F{ 4k2Izr
int i1=l; '%|Um3);0p
int i2=mid+1; ulg=,+%r
for(int cur=l;cur<=r;cur++){ p;zT #%
if(i1==mid+1) It'kO jx]
data[cur]=temp[i2++]; YJz06E1 -9
else if(i2>r) !6taOT>v
data[cur]=temp[i1++]; s 64@<oU<"
else if(temp[i1] data[cur]=temp[i1++]; &`!H1E^
else \ D>!&
data[cur]=temp[i2++]; x^`P[>
} C.u)2[(
} Tsu\4 cL]
/i!/)]*-
} ae0Mf0<#)
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改进后的归并排序: SdI>
d@ZXCiA},
package org.rut.util.algorithm.support; H2g#'SK@
k'"R;^~xg
import org.rut.util.algorithm.SortUtil; W>CG;x{
!*qQ7
/** n|.>41bJ
* @author treeroot 9O&MsTmg$
* @since 2006-2-2 KCa@0
* @version 1.0 um".Z4S
*/ yJ; ;&
public class ImprovedMergeSort implements SortUtil.Sort { #K-O<:s=y
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private static final int THRESHOLD = 10; A)SnPbI-p
_!Z}HCk
/* qpf|.m
* (non-Javadoc) G!F_Q7|-
* Z_jV0[\v0P
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) %gqu7}'
*/ Ql}#mC.>/
public void sort(int[] data) { ?56;<%0
int[] temp=new int[data.length]; s<C66z
mergeSort(data,temp,0,data.length-1); p)Ht =~
} <pT1p4T<
}lx'NY~(W
private void mergeSort(int[] data, int[] temp, int l, int r) { @[$q1Nm
int i, j, k; n#P?JyGm1g
int mid = (l + r) / 2; +q432ZG
if (l == r) 7S_"h*Ud
return; 5Yk|
if ((mid - l) >= THRESHOLD) GXTjK!
mergeSort(data, temp, l, mid); @-1VN;N
else #zn`)n
insertSort(data, l, mid - l + 1); S6yLq|W0
if ((r - mid) > THRESHOLD) @, z4{B
mergeSort(data, temp, mid + 1, r); WR*<|
else cR6#$-a
insertSort(data, mid + 1, r - mid); \S?;5LacZ
1$yS Ii
for (i = l; i <= mid; i++) { 2+YM .Zl
temp = data; YMwL(m1
} u69G #
for (j = 1; j <= r - mid; j++) { :N4?W}r.
temp[r - j + 1] = data[j + mid]; ,{RWs^W2
} %LL?'&&
int a = temp[l]; P=4o)e7E!
int b = temp[r]; 1[Jv9S*f/
for (i = l, j = r, k = l; k <= r; k++) { _>{"vY
if (a < b) { hZO=$Mm4p
data[k] = temp[i++]; / Kj;%
a = temp; %SMP)4Y/R
} else { ?+{qmqN
data[k] = temp[j--]; M1Th~W9l
b = temp[j]; {`% q0Nr
} y2x)<.cDP
} _cc9+o
} wqQrby<
rY=dNK]d
/** \z-OJ1[F
* @param data R|7_iMIZ
* @param l ]<o^Q[OL
* @param i d+7Dy3i|g=
*/ Ymcc|u6$"
private void insertSort(int[] data, int start, int len) { *ur[u*g
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); &,=t2_n
} G"prq&
} RjHKFB2
} Z9I ?j1K|!
} d a.6Z!a
vau#?U".}>
堆排序： 8&y3oxA,
p@=B\A]
package org.rut.util.algorithm.support; 3)~z~p7
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import org.rut.util.algorithm.SortUtil; 1GgG9I
z]Mu8
/** 6Y=MW{=F
* @author treeroot `SESj)W(y
* @since 2006-2-2 6:Zd,N=
* @version 1.0 cD4H@!=a
*/ McQWZ<
public class HeapSort implements SortUtil.Sort{ ulY<4MN
JsQmn<Yt
/* (non-Javadoc) v0~*?m4
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) @{^6_n+gT%
*/ :eTzjW=
public void sort(int[] data) { -*"Q-GO
MaxHeap h=new MaxHeap(); JKYkS*.a}
h.init(data); *}NJ
for(int i=0;i h.remove(); ]`n6H[6O
System.arraycopy(h.queue,1,data,0,data.length); m"8Gh`Fo
} GH6ozWA
DWar3+u&0
private static class MaxHeap{ 0%hOB:
!PY.FnZ
void init(int[] data){ bp(X\:zAy
this.queue=new int[data.length+1]; "+ 8Y{T
for(int i=0;i queue[++size]=data; ?Kf?Z`9 *Y
fixUp(size); "0A !fRI~
} ;1woTAuD
} 6 g`Y~ii
P}C;%KzA
private int size=0; `Ot;KDz
YumHECej
private int[] queue; hj-#pL-t
3SWO_
public int get() { %'i`Chc^!;
return queue[1]; /N(Ol WEp
} .UJjB}4$f
>Sh"/3%q
public void remove() { 6):^m{RH^
SortUtil.swap(queue,1,size--); q6 Rr?
fixDown(1); x*z$4)RP
} 92K#xM/
file://fixdown El`f>o+EJ
private void fixDown(int k) { aY@st]p
int j; lip1wR7
while ((j = k << 1) <= size) { $P%b?Y/
if (j < size %26amp;%26amp; queue[j] j++; V9i[dF
if (queue[k]>queue[j]) file://不用交换 VWR6/,N^_
break; (GJW3
SortUtil.swap(queue,j,k); zkRL'-
k = j; `$, \B
} Z3]ut#`
} ")ZsY9-P
private void fixUp(int k) { ~$3X>?Q
while (k > 1) { V$XCe
int j = k >> 1; 4{oS(Vl!
if (queue[j]>queue[k]) Yy:Q/zwo
break; 5PU$D`7it
SortUtil.swap(queue,j,k); /iekww^54
k = j; L[FNr&
} c|^#v8x^/
} %.*?i9}
n9Xssl0
} Kn<z<>vO
vg/:q>o
} @`6db
a\m@I_r.N
SortUtil： JQ.w6aE
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package org.rut.util.algorithm; w$5#jJX\
3d|n\!1r
import org.rut.util.algorithm.support.BubbleSort; :. ja~Q
import org.rut.util.algorithm.support.HeapSort; w;p!~o &
import org.rut.util.algorithm.support.ImprovedMergeSort; 0au\X$)Q
import org.rut.util.algorithm.support.ImprovedQuickSort; cp7Rpqg
import org.rut.util.algorithm.support.InsertSort; GGR hM1II
import org.rut.util.algorithm.support.MergeSort; ")87GQ(R
import org.rut.util.algorithm.support.QuickSort; \f7Aj>
import org.rut.util.algorithm.support.SelectionSort; 3Vj,O?(Z
import org.rut.util.algorithm.support.ShellSort; On{p(|l
(X"WEp^Q{I
/** Gf{FFIe(
* @author treeroot g^EkRBU
* @since 2006-2-2 ^KK6 d
* @version 1.0 a:(.{z?nM
*/ s1eGItx[w
public class SortUtil { g :me:M
public final static int INSERT = 1; 5-ju5z?=
public final static int BUBBLE = 2; c_xo6+:l
public final static int SELECTION = 3; 1$g]&'
public final static int SHELL = 4; K;wd2/jmJ
public final static int QUICK = 5; ZzuEw
public final static int IMPROVED_QUICK = 6; bQ"w%!
public final static int MERGE = 7; MQv2C@K9F
public final static int IMPROVED_MERGE = 8; Ux Yb[Nbc
public final static int HEAP = 9; M)oy3y^&
G=lket6
public static void sort(int[] data) { _lE0_X|d
sort(data, IMPROVED_QUICK); $0MP*TFWa
} aBO%qmtt
private static String[] name={ MWS=$N)v*
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 5`B!1
}; qdFYf/y
+h$)l/>:
private static Sort[] impl=new Sort[]{ J\@yP
new InsertSort(), 2Rp5 E^s
new BubbleSort(), -nQ:RHnd
new SelectionSort(), d|9B3I*I
new ShellSort(), Lit@ m2{\
new QuickSort(), tDl1UX
new ImprovedQuickSort(), K)AJx"
new MergeSort(), Q`dzn=
new ImprovedMergeSort(), [CU]fU{$
new HeapSort() ]oN:MS4r
}; De>'
p-=+i
public static String toString(int algorithm){ xJ|3}o:,
return name[algorithm-1]; Er6'Ig|U
} hYS*J908
oD]riA>jC
public static void sort(int[] data, int algorithm) { ]KS|r+
impl[algorithm-1].sort(data); i$Q$y hT{
} 2U-F}Z
Qifjv0&;u
public static interface Sort { 5ap~;t
public void sort(int[] data); h] (BTb#-
} qd9CKd
mE"?{~XVL
public static void swap(int[] data, int i, int j) { (YbRYu
int temp = data; S[bFS7[
data = data[j]; j#TtY|Po
data[j] = temp; +K3SAGm
} /=zzym~<>
} S?bG U8R5