[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; k4AF .U`I
} (PM!{u=
int i1=l; MoFAQe
int i2=mid+1; -/7[\S
for(int cur=l;cur<=r;cur++){ XITh_S4fs=
if(i1==mid+1) `E4+#_ v
data[cur]=temp[i2++]; Q)$RE{*-
else if(i2>r) 15/lX
data[cur]=temp[i1++]; c^?+"7oO0
else if(temp[i1] data[cur]=temp[i1++]; I|SQhbi
else z|^+uL
data[cur]=temp[i2++]; 9k`}fk\M
} ;ye5HlH}.
} uE}A-\G
lo!.%PP|
} BSMM3jXb
L2L=~/LG
改进后的归并排序: OX r%b
t.ci!#/d
package org.rut.util.algorithm.support; 4|]0%H~n6
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import org.rut.util.algorithm.SortUtil; `L=d72:
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/** 1h[xVvo<L
* @author treeroot <uYeev%
* @since 2006-2-2 kw gsf5[
* @version 1.0 0?{Y6:d+
*/ C=sEgtEI
public class ImprovedMergeSort implements SortUtil.Sort { L2j7w006
>p[skN
private static final int THRESHOLD = 10; ,8Yc@P_O
&Se!AcvKF
/* ?4^8C4
* (non-Javadoc) ^tFbg+.
* KbcmK(`_
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ]m(C}}
*/ .:nV^+)
public void sort(int[] data) { C~r(*nr
int[] temp=new int[data.length]; L2jjkyX]
mergeSort(data,temp,0,data.length-1); GlPd)m`
} xX5EhVR
#AN]mH
private void mergeSort(int[] data, int[] temp, int l, int r) { B}&9+2M
int i, j, k; v"K #
int mid = (l + r) / 2; ?}tWI7KI
if (l == r) L (#DVF
return; A'=,q
if ((mid - l) >= THRESHOLD) xeGl}q|
mergeSort(data, temp, l, mid); (z:DTe
else YWXY4*G
insertSort(data, l, mid - l + 1); AB1.l hR
if ((r - mid) > THRESHOLD) Wj}PtQ%lp/
mergeSort(data, temp, mid + 1, r); \uUd *
else b;K];o-/f
insertSort(data, mid + 1, r - mid); keMfK]9
yt@;yd:OEk
for (i = l; i <= mid; i++) { L#}HeOEi[
temp = data; \@KKX
} XP|qY1
for (j = 1; j <= r - mid; j++) { Cr a@
temp[r - j + 1] = data[j + mid]; \H-,^[G3
} A;'*>NS
int a = temp[l]; 'ZUB:R@[
int b = temp[r]; 5x}XiMM
for (i = l, j = r, k = l; k <= r; k++) { A$a>=U|Z8
if (a < b) { Q6e;hl
data[k] = temp[i++]; NF0=t}e
a = temp; v1m'p:7uGB
} else { w9c^IS
data[k] = temp[j--]; 97]$*&fH
b = temp[j]; qVidubsW
} n-5@<y^
} rZt7C(FM$7
} -{=c T?"+
e+? -#
/** WbP wO
* @param data .R<Ke\y/
* @param l 5e|2b] f$
* @param i u[>hs \3k
*/ ]-D&/88``
private void insertSort(int[] data, int start, int len) { 5YW.s
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ]%4rL S
} @TWtM#
} [Dv6z t>
} CL%+`c0
} EK JPeeRY
wRATe 0'
堆排序： $zR[2{bg
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package org.rut.util.algorithm.support; ER)<Twj
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import org.rut.util.algorithm.SortUtil; [&B}{6wry
@=0O'XM
/** &M5_G$5n
* @author treeroot 3!OO_
* @since 2006-2-2 MUeS8:q-N
* @version 1.0 -l ?J
*/ H)Kt!v8
public class HeapSort implements SortUtil.Sort{ ':[:12y[
$d +n},[C{
/* (non-Javadoc) ENEnHu^
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) pEn3:.l<
*/ .0eHP
public void sort(int[] data) { cfg_xrW0^
MaxHeap h=new MaxHeap(); w{HDCPuS
h.init(data); ~nSGN%
for(int i=0;i h.remove(); !6 k{]v
System.arraycopy(h.queue,1,data,0,data.length); uINm>$G,5
} } XJZw|n
x|6# /m
private static class MaxHeap{ MUs~ZF
jcuC2t
void init(int[] data){ }_A#O|dxO
this.queue=new int[data.length+1]; :q+D`s
for(int i=0;i queue[++size]=data; jl:dKL@
fixUp(size); _]Ei,Ua
} J6s55 v
} potb6jc?
u40k9vh
private int size=0; 'g$a.75/-
x9Qa.Jmj
private int[] queue; #3L=\j[ y
}"{NW!RfP
public int get() { HVz,liq
return queue[1]; ~Xf&<&5d T
} >UQ`@GdafR
@rh1W$
public void remove() { %~ROV>&
SortUtil.swap(queue,1,size--); ST^@7f_
fixDown(1); %NI'PXpI
} N;.cZp2
file://fixdown NUclF|G
private void fixDown(int k) { Ju~8C\Dd
int j; BwN>;g_
while ((j = k << 1) <= size) { gkN|3^
if (j < size %26amp;%26amp; queue[j] j++; ];|;")#=
if (queue[k]>queue[j]) file://不用交换 BU|bo")
break; `T;M=S^y*E
SortUtil.swap(queue,j,k); ?D^l&`S
k = j; }g?9/)z
} wJb\Q
} 05+uBwH
private void fixUp(int k) { 0k];%HV|
while (k > 1) { W9$mgs=S`E
int j = k >> 1; wkp|V{k
if (queue[j]>queue[k]) hgz7dF
break; :h|nV ~
SortUtil.swap(queue,j,k); ,B,2t u2
k = j; tvC7LLNP<
} @Lj28&4:<
} (S@H'G"
+bj[.
} `_+j+
lIN`1vX(
} #Moju
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SortUtil： mST/u>'
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package org.rut.util.algorithm; #\&jM -.-
KL4Z||n
import org.rut.util.algorithm.support.BubbleSort; E+65
import org.rut.util.algorithm.support.HeapSort; JQ*CF(9
import org.rut.util.algorithm.support.ImprovedMergeSort; fRTQ5V
import org.rut.util.algorithm.support.ImprovedQuickSort; 6^L4wd7)
import org.rut.util.algorithm.support.InsertSort; TV>UD q
import org.rut.util.algorithm.support.MergeSort; 8^H <dR
import org.rut.util.algorithm.support.QuickSort; *(~=L%s
import org.rut.util.algorithm.support.SelectionSort; uQ;b'6Jcp
import org.rut.util.algorithm.support.ShellSort; qYMTud[Vf
A3UC=z<y
/** iG[an*#X
* @author treeroot JvHGu&Nr!
* @since 2006-2-2 Ef;OrE""
* @version 1.0 @Y#{[@Hp%
*/ ypuW}H%`
public class SortUtil { NA,)FmQjk
public final static int INSERT = 1; kCRP?sj
public final static int BUBBLE = 2; | Wrf|%p
public final static int SELECTION = 3; !/w<F{cl
public final static int SHELL = 4; Xegg2.Kk
public final static int QUICK = 5; ;UU+:~
public final static int IMPROVED_QUICK = 6; ak?XE4-N
public final static int MERGE = 7; /lQGFLZL
public final static int IMPROVED_MERGE = 8; ~PT(/L
public final static int HEAP = 9; crJyk#_
OG_2k3v
public static void sort(int[] data) { CapWn~*g
sort(data, IMPROVED_QUICK); W*hRYgaX3
} c%uX+\-$
private static String[] name={ `]^JOw5o
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" N'fE^jqU
}; Os?`!1-
3N) bJ
private static Sort[] impl=new Sort[]{ 3B(6^iS
new InsertSort(), \advFKN
new BubbleSort(), +fd^$Qd%K
new SelectionSort(), pZ/aZg1Ld
new ShellSort(), S-"&#OfWg<
new QuickSort(), +_8*;k@F'
new ImprovedQuickSort(), bP`.teO\
new MergeSort(), <Gy)|qpK[
new ImprovedMergeSort(), 0R,?$qM\
new HeapSort() yIwAJl7Xf
}; 3|Q:tt'|#
"8Ud&o
public static String toString(int algorithm){ Cwxy~.mI
return name[algorithm-1]; Fz_SID
} nlsQf3
'3f"#fF6
public static void sort(int[] data, int algorithm) { ]@W.5!5H
impl[algorithm-1].sort(data); ,X&lVv#
} ?qviJDD|f
`e t0i.
public static interface Sort { t)n!];
public void sort(int[] data); VRYj&s'@
} .17WF\1HC.
-{i;!XE$SR
public static void swap(int[] data, int i, int j) { 5-Vdq
int temp = data; ocCC63J
data = data[j]; KZ/U2.{O<
data[j] = temp; vdloh ,
} [q/=%8qLUA
} (gQ^jmZPG