[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; v^&HZk=(
} 'Dfs&sm
int i1=l; FF8jW1
int i2=mid+1; ,buX|
for(int cur=l;cur<=r;cur++){ N]W*ei
if(i1==mid+1) =Z+^n ?"
data[cur]=temp[i2++]; B!&5*f}*
else if(i2>r) .BPd06y
data[cur]=temp[i1++]; 08ZvRy(Je<
else if(temp[i1] data[cur]=temp[i1++]; gclj:7U
else t=7Gfv
data[cur]=temp[i2++]; 6m&GN4Ca
} )>ff"| X
} 0/QDfA?
0N1t.3U
} 7@{%S~TN
>M5}L<
改进后的归并排序: U4d7-&U
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package org.rut.util.algorithm.support; %E%=Za
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import org.rut.util.algorithm.SortUtil; Ny"9!3V
5j`sJvq
/** 0eO!,/
* @author treeroot rRevyTs
* @since 2006-2-2 />xEpR3_A
* @version 1.0 S\Z*7j3;M
*/ gxhp7c182
public class ImprovedMergeSort implements SortUtil.Sort { i7dDklj4
~;(\a@ _
private static final int THRESHOLD = 10; `6rLd>=R
u/W{JPlL
/* Y's=31G@
* (non-Javadoc) 1'~+.92Y
* 3JD62wtx
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) *l d)nH{
*/ ta&z lZt
public void sort(int[] data) { b#7nt ?`7p
int[] temp=new int[data.length]; 1<9d[N*
mergeSort(data,temp,0,data.length-1); 7UBW3{d/u5
} zDYJe_m ~
QY+{ OCB
private void mergeSort(int[] data, int[] temp, int l, int r) { >0kL9_9{
int i, j, k; ${Lrj}93
int mid = (l + r) / 2; e[k\VYj[
if (l == r) @{V`g8P>
return; ~H''RzN
if ((mid - l) >= THRESHOLD) 8k{XUn
mergeSort(data, temp, l, mid); .dzw5R&
else 1mgw0QO
insertSort(data, l, mid - l + 1); f$ /C.E
if ((r - mid) > THRESHOLD) v2|zIZ
mergeSort(data, temp, mid + 1, r); UHY)+6qt]
else hpOY&7QUTD
insertSort(data, mid + 1, r - mid); GF9iK|i/
J{Ij
for (i = l; i <= mid; i++) { rDaiAx&
temp = data; "QfF]/:
} d;%~\+)x4
for (j = 1; j <= r - mid; j++) { *mWS+xcU(L
temp[r - j + 1] = data[j + mid]; fk^DkV^<
} -XECYwTh
int a = temp[l]; a&)$s;
int b = temp[r]; E#w2'(t
for (i = l, j = r, k = l; k <= r; k++) { aS3-A4
if (a < b) { L#vk77
data[k] = temp[i++]; Pw|/PfG
a = temp; TFc/`
} else { Rv*x'w ==
data[k] = temp[j--]; @)ozgs@e
b = temp[j]; i+-Y"vRi
} k:s86q
} :)_P7k`>e/
} 0} \;R5a<
Iq;a!Lya-
/** Y$q--JA
* @param data {flxZ}
* @param l aj+I+r"~
* @param i +/*A}!#v
*/ 5tbi};
private void insertSort(int[] data, int start, int len) { h7\EN
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 6l?KX
} Izfj 9h ?
} 5PHAd4=bJ
} xJzO?a'
} h1_KZ[X
D2Kh+~l
堆排序： `4]-B@ 7_
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package org.rut.util.algorithm.support; [VB\T|$
nG5:H.)
import org.rut.util.algorithm.SortUtil; ! F&{I
bDcWPwe
/** -/qu."9(B
* @author treeroot |w^nCsv
* @since 2006-2-2 r#.\5aQt
* @version 1.0 DCtrTX
*/ h "r)z6Q/
public class HeapSort implements SortUtil.Sort{ EEp,Z`
H"g p
/* (non-Javadoc) XAr YmO
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) W[W}:@KZ
*/ 4[]4KKO3Q2
public void sort(int[] data) { C@ z^{Z+
MaxHeap h=new MaxHeap(); ;i&'va$
h.init(data); F0FF:><
for(int i=0;i h.remove(); uod&'g{N
System.arraycopy(h.queue,1,data,0,data.length); j1,ir
} D7x"P-ie
G_x<2E"d
private static class MaxHeap{ !n/"39KT
9a9{OJa6M
void init(int[] data){ ) crhF9!4
this.queue=new int[data.length+1]; &P{[22dQ
for(int i=0;i queue[++size]=data; :AB$d~${M>
fixUp(size); `=3:*.T*
} #}!Ge
} ;HeUD5Nt6F
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private int size=0; t|aBe7t7
_6 |lw&o07
private int[] queue; 3 tp'}v
"V;M,/Q|
public int get() { 9q-9UC!g
return queue[1]; 5}4r'P$m:
} %9A6c(L
hIPU%
public void remove() { auTApYS53
SortUtil.swap(queue,1,size--); n_51-^*z
fixDown(1); Hb;#aXHSd
} 0ZXG{Gp9S
file://fixdown k/yoRv%
private void fixDown(int k) { Ln})\ UDK)
int j; bi bjFg
while ((j = k << 1) <= size) { G~I@'[ur
if (j < size %26amp;%26amp; queue[j] j++; L= fz:H
if (queue[k]>queue[j]) file://不用交换 nDSmr
break; c?{&=,u2
SortUtil.swap(queue,j,k); V\"x#uB
k = j; h$FpH\-
} 1#9Q1@'OS
} ]N^a/&}*
private void fixUp(int k) { FaC;vuSpy
while (k > 1) { eEIa=MB*
int j = k >> 1; $4y;F]
if (queue[j]>queue[k]) <8>gb!DG
break; Bg*Oj)NM
SortUtil.swap(queue,j,k); 2Ke?*
k = j; D}wM$B@S
} i*'6"
} oq4*m[
{(i>$RG_
} |"vUC/R2&
gf^"sfNk
} MMglo3
A=/|f$s+
SortUtil： jemg#GB8
0 V:z(r
package org.rut.util.algorithm; mYf7?I~
x8xSA*@k
import org.rut.util.algorithm.support.BubbleSort; 0!YB.=\{_q
import org.rut.util.algorithm.support.HeapSort; sXdNlR&
import org.rut.util.algorithm.support.ImprovedMergeSort; ;#G)([
import org.rut.util.algorithm.support.ImprovedQuickSort; 8*;88vW"2
import org.rut.util.algorithm.support.InsertSort; Q<.847 )
import org.rut.util.algorithm.support.MergeSort; mdW8RsR
import org.rut.util.algorithm.support.QuickSort; \Jr ta
import org.rut.util.algorithm.support.SelectionSort; |-l)$i@
import org.rut.util.algorithm.support.ShellSort; gf()NfUvRH
p9ligs7V'
/** YoV^Y&:9<
* @author treeroot p}%T`e=Z9
* @since 2006-2-2 ;ZMm6o
* @version 1.0 sf\p>gb
*/ Q%61_l
public class SortUtil { 8{aS$V"
public final static int INSERT = 1; s*.CJ
public final static int BUBBLE = 2; [hE0 9W
public final static int SELECTION = 3; bLyU;
public final static int SHELL = 4; <RfPd+</
public final static int QUICK = 5; ^W|B Xxo
public final static int IMPROVED_QUICK = 6; #gzY _)E
public final static int MERGE = 7; RM8p[lfX
public final static int IMPROVED_MERGE = 8; zyyt`
public final static int HEAP = 9; Nf(Np1?;c
]3Z?Q
public static void sort(int[] data) { 6KuB<od
sort(data, IMPROVED_QUICK); 'k[O?}
} #flOaRl.
private static String[] name={ f>\guuG
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" :=qblc
}; 5}d"nx
gPs%v`y)*D
private static Sort[] impl=new Sort[]{ vovc,4}
new InsertSort(), bi`{ k\3A
new BubbleSort(), |F_Z
new SelectionSort(), ag Za+a
new ShellSort(), /XtpGk_1)
new QuickSort(), n#,<-Rb-
new ImprovedQuickSort(), #w\Bc\
new MergeSort(), VhdMKq~`
new ImprovedMergeSort(), oG5:]/F
new HeapSort() Vsh7>|@
}; !QK~l
;8z40cD
public static String toString(int algorithm){ T~B'- >O
return name[algorithm-1]; >05_#{up
} K:Mm?28s
L'XX++2
public static void sort(int[] data, int algorithm) { M>H4bU(
impl[algorithm-1].sort(data); ?'F>DN
} 29P vPR6
2,.%]U
public static interface Sort { `uRf*-
public void sort(int[] data); E[N5vG<
} ]^9B%t s9
C1 qyjlR
public static void swap(int[] data, int i, int j) { iwb]mJUA
int temp = data; # 3{g6[Y
data = data[j]; VT.BHZ
data[j] = temp; 4Y>v+N^
} >y<yFO{
} TUeW-'/1