[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; zA!0l*H
} 3neIR@W
int i1=l; 6^c>,.R
int i2=mid+1; nE^Qy=iE
for(int cur=l;cur<=r;cur++){ ]Wq?H-B{
if(i1==mid+1) ~DsECnD
data[cur]=temp[i2++]; sPb=82~z
else if(i2>r) pmFk50`
data[cur]=temp[i1++]; v!FMs<
else if(temp[i1] data[cur]=temp[i1++]; o,!T2&}
else \a=D
data[cur]=temp[i2++]; v^_mFp-}\
} a /:@"&Y
} _"#!e{N|
yH<$k^0r*
} ]wWPXx[>/
V86Xg:?7
改进后的归并排序: j* *s^Sg
=07]z@s
package org.rut.util.algorithm.support; kee|42E
VT.;:Q
import org.rut.util.algorithm.SortUtil; xGG,2W+z
\J6hI\/4^
/** &k1T08C*
* @author treeroot *\o/q[
* @since 2006-2-2 %c1#lEC2xN
* @version 1.0 $L2%u8}8:
*/ -dO'~all
public class ImprovedMergeSort implements SortUtil.Sort { W},b{NT
`W-&0|%Ta
private static final int THRESHOLD = 10; .?>5-od2
Na\WZSu'"
/* P@]8pIB0d^
* (non-Javadoc) F>X-w+b4r
* N7s'6(`=X
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ;=< ^0hxer
*/ 07/L}b`P
public void sort(int[] data) { 7E@+
int[] temp=new int[data.length]; er.CDKD%L
mergeSort(data,temp,0,data.length-1); tdF9NFMD
} =ORf%f5"'
=D^TK-H
private void mergeSort(int[] data, int[] temp, int l, int r) { pU!o7>p
int i, j, k; yxBUj*3
int mid = (l + r) / 2; ./p|?pu
if (l == r) #2tCV't
return; m4[g6pNx~
if ((mid - l) >= THRESHOLD) cMzkL%
mergeSort(data, temp, l, mid); ntP|\E
else 9Z6C8Jv
insertSort(data, l, mid - l + 1); 3g~^LZ66
if ((r - mid) > THRESHOLD) ~^vC,]hU
mergeSort(data, temp, mid + 1, r); D0;tcm.$
else ~B$b)`*
insertSort(data, mid + 1, r - mid); htPqT,L
)nu~9km3
for (i = l; i <= mid; i++) { r Db>&s3
temp = data; qXXGF_Q
} gNx+>h`AF
for (j = 1; j <= r - mid; j++) { 2BzqY`O
temp[r - j + 1] = data[j + mid]; oY`qInM_
} .~}z4r
int a = temp[l]; )h^NR3N
int b = temp[r]; \O7J=6fn
for (i = l, j = r, k = l; k <= r; k++) { )uP[!LV[e
if (a < b) { jK8'T_Pah
data[k] = temp[i++]; k*-NsNPw$
a = temp; mh;X~.98
} else { a-n4:QT
data[k] = temp[j--]; c#b:3dXx9
b = temp[j]; r-w2\2
} tL0`Rvl
} :G)<}j"sM
} ,M3z!=oIGn
<E':[.zC
/** KIL18$3J
* @param data #Nte^E4
* @param l rdj@u47
* @param i !;>(ie\
*/ Xz;b,C&*t
private void insertSort(int[] data, int start, int len) { )Mzt3u
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); iilyw_$H
} c!&Qj
} =hw^P%Zn
} bdV3v`
} .#^0pv!
OoP@-D"e
堆排序： W81o"TR|pt
"+iAd.qd
package org.rut.util.algorithm.support; ?gV'(3 !
$<e +r$1
import org.rut.util.algorithm.SortUtil; Jm![W8L
<<3+g"enno
/** W._G0b4}
* @author treeroot +0pW/4x
* @since 2006-2-2 Bt>}LLBS2
* @version 1.0 I$N7pobh
*/ TC-f%1(
public class HeapSort implements SortUtil.Sort{ :'w?ye[e
fkW(Dt,
/* (non-Javadoc) 0&`}EXe<f
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) oofFrAaT
*/ $e/*/.
public void sort(int[] data) { hU,$|_WDy
MaxHeap h=new MaxHeap(); J1-):3A
h.init(data); ?;8M^a/
for(int i=0;i h.remove(); ,o&<WMD
System.arraycopy(h.queue,1,data,0,data.length); |h1^Gv
} Tcs3>lJ}
~yN(-I1P
private static class MaxHeap{ }W "(cYN_
}Z6nN)[|0Y
void init(int[] data){ Kcn\g.
this.queue=new int[data.length+1]; p#b{xK
for(int i=0;i queue[++size]=data; A*Q[k 9B
fixUp(size); sM9-0A
} L;C|ow^c
} s<{GpWT8
-ddOh<U>
private int size=0; &9h
}9Qf#&o
private int[] queue; ,'-?:`hP'
`Y\QUj
public int get() { <W|1<=z(
return queue[1]; IuWX*b`v
} 7+S44)w}~
-CElk[u
public void remove() { q+J0}y{#8)
SortUtil.swap(queue,1,size--); aZ/yCS7
fixDown(1); q5gP~*?
} J]]\&MtaO
file://fixdown Eb7}$Ji\
private void fixDown(int k) { 7`+UB>8
int j; 4`G=q^GL,
while ((j = k << 1) <= size) { #J3zTG(:@
if (j < size %26amp;%26amp; queue[j] j++; i\Q":4
if (queue[k]>queue[j]) file://不用交换 .6I%64m
break; ?7 X3P
SortUtil.swap(queue,j,k); W#Cq6N
k = j; +ks$UvtY
} " xxXZGUp
} .n=xbx:=
private void fixUp(int k) { ~:s!].H
while (k > 1) { gTyW#verh$
int j = k >> 1; 6<Be#Y]b
if (queue[j]>queue[k]) tpd|y|
break; ?xf~!D
SortUtil.swap(queue,j,k); !?Tzk&'
k = j; p?KCVvx$
} I@c0N*(
} 9cbB[c_.
1dXh\r_n
} >d)|r
$&NbLjeS
} 7~ILRj5Nq
Q,O]x#
SortUtil： bv_AJ4gS
Z^C!RSQ
package org.rut.util.algorithm; W|FNDP0
lTd+{TF.
import org.rut.util.algorithm.support.BubbleSort; %{c2lyw
import org.rut.util.algorithm.support.HeapSort; ) +*@AME
import org.rut.util.algorithm.support.ImprovedMergeSort; X{4xm,B/
import org.rut.util.algorithm.support.ImprovedQuickSort; Y~<rQ
import org.rut.util.algorithm.support.InsertSort; %9cqJ]S
import org.rut.util.algorithm.support.MergeSort; UYlJO{|a
import org.rut.util.algorithm.support.QuickSort; mn,=V[f
import org.rut.util.algorithm.support.SelectionSort; z, :+Oc
import org.rut.util.algorithm.support.ShellSort; FP0<-9DO
=]6_{#Z<
/** ,[+ZjAyG}#
* @author treeroot YL_!#<k@
* @since 2006-2-2 _zAc 5rS
* @version 1.0 2I9{+>k
*/ %pQdq[J={
public class SortUtil { \0xzBs1!
public final static int INSERT = 1; h%4~0
public final static int BUBBLE = 2; z2$FYn Q
public final static int SELECTION = 3; mOgx&ns;j
public final static int SHELL = 4; )3d:S*ly
public final static int QUICK = 5; C%qtCk_cN
public final static int IMPROVED_QUICK = 6; $H %+k?
public final static int MERGE = 7; Va&KIHw
public final static int IMPROVED_MERGE = 8; jCdZ}M($
public final static int HEAP = 9; -uS7~Ww.a
Fvcq^uZ
public static void sort(int[] data) { jnx+wcd
sort(data, IMPROVED_QUICK); ant-\w>}
} uugzIV)
private static String[] name={ Xb8:*Y1'
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" "y3dwSS
}; oQKcGUZ
_,Io(QS
private static Sort[] impl=new Sort[]{ Ji)a%j1V9
new InsertSort(), 4 g/<).1<b
new BubbleSort(), Ra*k
new SelectionSort(), ]ys4
new ShellSort(), ueS[sN!
new QuickSort(), X_EC:GU
new ImprovedQuickSort(), cPa 0n4
new MergeSort(), Mf,Mcvs
new ImprovedMergeSort(), tleK(^
new HeapSort() Z{|.xgsY
}; *=KexOa9
"m\UqQGX
public static String toString(int algorithm){ *RqO3=
return name[algorithm-1]; Q?I"J$]&L
} 1Tts3O.
y}H*p
public static void sort(int[] data, int algorithm) { Cvu8X&y
impl[algorithm-1].sort(data); cWy*K4O
} <aQ; "O~
c Gaz$=/
public static interface Sort { jd*%.FDi{
public void sort(int[] data); PSrt/y!
} f T+n-B
>?uH#%C5
public static void swap(int[] data, int i, int j) { 6DiA2'{f
int temp = data; l%)=s~6z
data = data[j]; He$mu=$q{
data[j] = temp; |SXMu_w
} NiQc2\4%
} MjF.>4