[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; OHdCt
} J)6RXt*!
int i1=l; 5%rD7/7N
int i2=mid+1; Eyxw.,rB/
for(int cur=l;cur<=r;cur++){ K=;z&E=<c
if(i1==mid+1) a-MDZT<xA+
data[cur]=temp[i2++]; 5)wz`OS
else if(i2>r) razVO]]E
data[cur]=temp[i1++]; ?dl7!I@<E<
else if(temp[i1] data[cur]=temp[i1++]; iN %kF'&9
else ~gNa<tg"1
data[cur]=temp[i2++]; )V*Z|,#no
} ULIbVy7Y
} frWw-<HoI
4N[8LC;MH
} q~^Jd=cB\
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改进后的归并排序: L%# #U'e3
2ro4{^(_
package org.rut.util.algorithm.support; uLD%M av
OxqK}%=Bw
import org.rut.util.algorithm.SortUtil; V*@pmOhz
8{Bcl5]<
/** V:4]]z L}
* @author treeroot th}Q`vg0
* @since 2006-2-2 Y,RBTH
* @version 1.0 ^G.PdX$M
*/ 2j9Mr
public class ImprovedMergeSort implements SortUtil.Sort { Vahfz8~w/
%a{$M{s
private static final int THRESHOLD = 10; x6d+`4
6J9^:gXW~
/* OGw =e{
* (non-Javadoc) ng(STvSh:
* (]n^_G#-$
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 1@JAY!yoo_
*/ Bd*:y qi
public void sort(int[] data) { IGeXj%e
int[] temp=new int[data.length]; f7c%Z:C#Y
mergeSort(data,temp,0,data.length-1); cY ^>`
} paF$o6\
~4S@kYe{3K
private void mergeSort(int[] data, int[] temp, int l, int r) { :@a8>i1&
int i, j, k; hg_@Ui@[z
int mid = (l + r) / 2; QCIH1\`jW
if (l == r) %e.tAl"!$
return; "a %5on
if ((mid - l) >= THRESHOLD) k\8]fh)J\7
mergeSort(data, temp, l, mid); Squ'd
else ZT:&j4A|0
insertSort(data, l, mid - l + 1); FGo{6'K(:
if ((r - mid) > THRESHOLD) U6;,<-bL
mergeSort(data, temp, mid + 1, r); bx`s;r=
else tn&~~G~#
insertSort(data, mid + 1, r - mid); }ac0}
6,"86
for (i = l; i <= mid; i++) { 3e+ Ih2
temp = data; 48l!P(>?y
} Q>]FO
for (j = 1; j <= r - mid; j++) { 1|_jV7`Mz
temp[r - j + 1] = data[j + mid]; jHBzZ!<
} r8x<-u4
int a = temp[l]; x?v/|
int b = temp[r]; Z+!._uA
for (i = l, j = r, k = l; k <= r; k++) { %;$zR}
if (a < b) { sDA&U9;
data[k] = temp[i++]; .\K0+b;
a = temp; #/a>dK
} else { 4jMCE&<
data[k] = temp[j--]; T{-<G13
b = temp[j]; kXK D>."E*
} qT7E"|.$
} <\l@`x96"D
} OPHf9T3H
oKjQ? 4
/** \6~(#y
* @param data ~ HFDX@m*
* @param l 'au7rX(
* @param i k`ulDQu
*/ n\Y{?x
private void insertSort(int[] data, int start, int len) { r!A1Sfo4P
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); b3]QH h/
} 8L]em&871
} >Z@^R7_W
} F)rU*i7
} Nr 5h%<`I
3.,O7 k7y
堆排序： S?TyC";!
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package org.rut.util.algorithm.support; Qz6Ry\u
Ni"n_Yun
import org.rut.util.algorithm.SortUtil; Dg(882#_
zSt6q
/** M{M>$pt
* @author treeroot cYHHCaCS
* @since 2006-2-2 ]@YBa4}w
* @version 1.0 + q@kRQY;n
*/ 4mNg(w=NF
public class HeapSort implements SortUtil.Sort{ v53qpqc
#'s}=i}y"C
/* (non-Javadoc) mT enzIp
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) =To}yJ#
*/ 0G@sj7)]
public void sort(int[] data) { 8~Avg6,
MaxHeap h=new MaxHeap(); :rr;9nMR[
h.init(data); 7S+_eL^
for(int i=0;i h.remove(); Reci:T(_
System.arraycopy(h.queue,1,data,0,data.length); cZ>h[XX[
} o9&&u1`M/
hes$LH
private static class MaxHeap{ ~m4{GzB
^=kUNyY
void init(int[] data){ 2 VgFP3
this.queue=new int[data.length+1]; UOh%"h
for(int i=0;i queue[++size]=data; m^hi}Am1
fixUp(size); aLzRbRv
} 8&T6
} L<8:1/d\
Td~CnCor
private int size=0; 9&(d2
Z:51Q
private int[] queue; %-u Ra\
9cV;W\ Tw
public int get() { )q#1C]7m*
return queue[1]; cO}`PD$i
} gzdR|IBa
gr]:u4}
public void remove() { HHd;<%q
SortUtil.swap(queue,1,size--); !I3_KuJ5
fixDown(1); t\&u
} rmVF88/;
file://fixdown ks{y=@<,
private void fixDown(int k) { gKyYBr
int j; .7lDJ2
while ((j = k << 1) <= size) { rDr3)*H?0
if (j < size %26amp;%26amp; queue[j] j++; ^eu={0k
if (queue[k]>queue[j]) file://不用交换 =2-!ay:
break; wLX:~]<xl
SortUtil.swap(queue,j,k); ^Yu<fFn
k = j; _G9vsi
} k;aV4 0N9
} ++b1VBP
private void fixUp(int k) { +-8S,Rg@
while (k > 1) { b=Rw=K.
int j = k >> 1; !{hC99q6
if (queue[j]>queue[k]) |/Q7 o1i
break; CVo2?ZQ
SortUtil.swap(queue,j,k); zB,Vi-)vH
k = j; vE4ce
} P[E:=p
} frsqnvm;+
mBb;:-5
} Yfro^}f
_wvSLu<q
} w0`aW6t#
6Ja} N
SortUtil： {[Bo"a>%
jS_fwuM
package org.rut.util.algorithm; *CsRO
8Jnl!4
import org.rut.util.algorithm.support.BubbleSort; /3( a'o[
import org.rut.util.algorithm.support.HeapSort; cu)ssT
import org.rut.util.algorithm.support.ImprovedMergeSort; os<YfMM<:/
import org.rut.util.algorithm.support.ImprovedQuickSort; /E(319u_
import org.rut.util.algorithm.support.InsertSort; mPhrMcL
import org.rut.util.algorithm.support.MergeSort; Ab| tE5%
import org.rut.util.algorithm.support.QuickSort; ui_nvD:
import org.rut.util.algorithm.support.SelectionSort; Q7<_>)e^
import org.rut.util.algorithm.support.ShellSort; 5X8GR5P
Io8h 8N-
/** w4 R!aWLd
* @author treeroot dS+/G9X^
* @since 2006-2-2 =1/d>kke
* @version 1.0 6.uyY@Yx
*/ ?zFeP6C
public class SortUtil { ! };OLQ
public final static int INSERT = 1; @jXdQY%{
public final static int BUBBLE = 2; jY: )W*TXt
public final static int SELECTION = 3; uL.)+E
public final static int SHELL = 4; ]Tv0+ Ao
public final static int QUICK = 5; S!\4,6
public final static int IMPROVED_QUICK = 6; ^T^l3B[
public final static int MERGE = 7; :K-05$K
public final static int IMPROVED_MERGE = 8; U/9i'D[|{
public final static int HEAP = 9; gd#j{yI/Xf
dp&8:jy
public static void sort(int[] data) { "'#18&N
sort(data, IMPROVED_QUICK); osBwX.G'l
} w+,Kpb<x[0
private static String[] name={ ,RP"m#l!\
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" G&eRhif
}; LIm{Y`XU
<FaF67[Q
private static Sort[] impl=new Sort[]{ 8XS_I{}?
new InsertSort(), HUP~
new BubbleSort(), @e`%'
new SelectionSort(), J(0E'o{ug
new ShellSort(), D9hV`fA
new QuickSort(), %MA o<,ha
new ImprovedQuickSort(), 5X4 #T&.
new MergeSort(), >#9f{
new ImprovedMergeSort(), ]2Vu+AP
new HeapSort() &oU) ,H
}; B^;G3+}
+-s$Htx
public static String toString(int algorithm){ eUY/H1
return name[algorithm-1]; ]RBT9@-:U
} -k4w$0)
pZVT:qFF
public static void sort(int[] data, int algorithm) { ][gr(-68
impl[algorithm-1].sort(data); v--Qbu
} WNO|ziy
2rzOh},RS
public static interface Sort { vS@;D7ep
public void sort(int[] data); PG51+#
} *h <_gn
-VC kk
public static void swap(int[] data, int i, int j) { JY5)^<.d
int temp = data; ~!t#M2Sk
data = data[j]; E~4d6~s
data[j] = temp; +n'-%?LD&
} 3Ygt!
} 4V6^@