[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; "M|zv
} E;<l(.Ar
int i1=l; ox+ 3U
int i2=mid+1; <7-J0btV
for(int cur=l;cur<=r;cur++){ f>aRkTHf
if(i1==mid+1) )T;?^kho
data[cur]=temp[i2++]; $95h2oXt
else if(i2>r) UI>Y0O
data[cur]=temp[i1++]; =XXZ?P
else if(temp[i1] data[cur]=temp[i1++]; sZW^!z
else hEh}PX:
data[cur]=temp[i2++]; w`q%#qRk
} ew"v{=X
} e9Nk3Sj]
F<!)4>2@
} /4xki_}
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改进后的归并排序: 4.IU!.Uo
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package org.rut.util.algorithm.support; Y(44pA&oN
#!)n {h+
import org.rut.util.algorithm.SortUtil; >@"Oe
ss5m/i7
/** %;.;>Y(-
* @author treeroot ?JL:CBvCp
* @since 2006-2-2 C-iK$/U
* @version 1.0 r2k2%nI-J
*/ e^ v.)
public class ImprovedMergeSort implements SortUtil.Sort { jg?x&'u\)
ar:+;.n
private static final int THRESHOLD = 10; byv[yGa`
!"eIV@7
/* Y5F]:gs@
* (non-Javadoc) ( H6c{'&
* vap,y $C
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) sP ls zC[
*/ +|tC'gCnV
public void sort(int[] data) { /~^rr f
int[] temp=new int[data.length]; :UQTEdc{
mergeSort(data,temp,0,data.length-1); Uh][@35 p
} =C~/7N,lW]
jAud {m*T
private void mergeSort(int[] data, int[] temp, int l, int r) { /PLn+-
int i, j, k; #lkM=lY'
int mid = (l + r) / 2; (&!NC[n,
if (l == r) 4._(|
return; J_FNAdQt
if ((mid - l) >= THRESHOLD) up'Tit
mergeSort(data, temp, l, mid); );FJx~b
else lGVEpCS}
insertSort(data, l, mid - l + 1); L(U"U#QZ
if ((r - mid) > THRESHOLD) s>^dxF!+
mergeSort(data, temp, mid + 1, r); e[8LmuIZ
else u?9" jX
insertSort(data, mid + 1, r - mid); !%c'$f/
KCWc`Oz
for (i = l; i <= mid; i++) { {#{DH?=^)u
temp = data; *V+j%^91}
} X$yN_7|+
for (j = 1; j <= r - mid; j++) { 3"O>&Q0c
temp[r - j + 1] = data[j + mid]; U4cY_p?
} z@wMc EH
int a = temp[l]; {c (!;U
int b = temp[r]; f4BnX(1u
for (i = l, j = r, k = l; k <= r; k++) { "I QlVi
if (a < b) { 'D@-
data[k] = temp[i++]; v$N|"o""
a = temp; @WI2hHD
} else { b?Ki;[+O
data[k] = temp[j--]; {Lm~r+ U
b = temp[j]; &\Amn?Iq
} 8HP6+c%
} 6,9o>zT%H
} ~j<+k4I~
3"P }n
/** ezMI\r6
* @param data =MvjLh"s
* @param l ,~"$k[M
* @param i U{VCZ*0cj
*/ e/^=U7:io
private void insertSort(int[] data, int start, int len) { #es9d3~\
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); SXy=<%ed
} F}=aBV|-
} ##4GK08!
} 'z$Q rFW
} Jm42b4
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堆排序： d20gf:@BM
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package org.rut.util.algorithm.support; B` k\EL'
HB7;0yt`:
import org.rut.util.algorithm.SortUtil; 1n@8Kv
PnoPbk[<
/** Yc'kvj)_M
* @author treeroot f{FDuIln
* @since 2006-2-2 =XY\iV1J*
* @version 1.0 qBCK40
*/ Dre]AsgiV
public class HeapSort implements SortUtil.Sort{ YiPoYlD*n<
m o:D9
/* (non-Javadoc) Uy$)%dYfq5
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) `+uhy,
*/ ma((2My'H
public void sort(int[] data) { B:+6~&,-
MaxHeap h=new MaxHeap(); O/<K!;(@?
h.init(data); ,L`$09\
for(int i=0;i h.remove(); p8]68!=W\F
System.arraycopy(h.queue,1,data,0,data.length); beu\cV3
} WASU0
#cCL.p"]
private static class MaxHeap{ u5Ftu?t
V?=8".GiX
void init(int[] data){ 9F*+YG!
this.queue=new int[data.length+1]; ETXZ?\<a5
for(int i=0;i queue[++size]=data; AqV7\gdOC
fixUp(size); pi ,eIm
} o5Q{/
} IzpZwx^3''
8A+SjJ4$
private int size=0; GO^_=EMR[
_C`K*u 6Z<
private int[] queue; sUU{fNC6|
x(eb5YS
public int get() { ruazOmnn~
return queue[1]; u6bXv(
} !H}vu]R
iV eC=^1
public void remove() { .3MIcj=p
SortUtil.swap(queue,1,size--); ,Y>Bex_v
fixDown(1); 7IjQi=#:
} 3fh8$A
file://fixdown &w1P\4?G
private void fixDown(int k) { mljh|[
int j; 4-[J@
while ((j = k << 1) <= size) { I:d[Q s
if (j < size %26amp;%26amp; queue[j] j++; :=[XW?L%x
if (queue[k]>queue[j]) file://不用交换 n8DxB@DI
break; KFFSv{m[
SortUtil.swap(queue,j,k); |e2be1LD
k = j; }eRD|1
} WuZ/C_
} w18y}mS"H
private void fixUp(int k) { .k0~Vh2u
while (k > 1) { hc'-Dh
int j = k >> 1; Ix(><#P
if (queue[j]>queue[k]) 6O}`i>/6M
break; #2EI\E&$
SortUtil.swap(queue,j,k); _z1(y}u}
k = j; {Pc<u gfl
} 6l4mS~/
} ]| +<P-
91xB9k1zO
} qvv2O1c"A
;j)FnY=:-
} ?2g`8[">
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SortUtil： tT79p.z B
rrCNo^W1
package org.rut.util.algorithm; wW/7F;54
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import org.rut.util.algorithm.support.BubbleSort; 0s>/mh;
import org.rut.util.algorithm.support.HeapSort; Vb'7>
import org.rut.util.algorithm.support.ImprovedMergeSort; Q;D0<Bv
import org.rut.util.algorithm.support.ImprovedQuickSort; U_{Ux2
import org.rut.util.algorithm.support.InsertSort; <!pvqNApg
import org.rut.util.algorithm.support.MergeSort; <bD>m[8,
import org.rut.util.algorithm.support.QuickSort; EVNY*&p
import org.rut.util.algorithm.support.SelectionSort; L^{|uP15N
import org.rut.util.algorithm.support.ShellSort; PtTHPAKj
5=1^T@~#&
/** 5efpeu
* @author treeroot nM0[P6p
* @since 2006-2-2 [u._q:A
* @version 1.0 u@4V7;L
*/ P(K>=O
public class SortUtil { MXyaE~LK
public final static int INSERT = 1; hsw9(D>jp
public final static int BUBBLE = 2; s\P2Bp_{
public final static int SELECTION = 3; 2^^=iU=!<|
public final static int SHELL = 4; d`/tE?Gw
public final static int QUICK = 5; G7CG~:3h+
public final static int IMPROVED_QUICK = 6; zH*KYB
public final static int MERGE = 7; %zOh
public final static int IMPROVED_MERGE = 8; d%0~c'D8a
public final static int HEAP = 9; MX ;J5(Ae
FEJ~k1z
public static void sort(int[] data) { EMc;^ d
sort(data, IMPROVED_QUICK); !Lh^oPT"I
} E.U_W
private static String[] name={ O/!bG~\Y
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Tr#V*.x
}; 5P'p2x#U
c-Pw]Ju
private static Sort[] impl=new Sort[]{ +L5\;
new InsertSort(), QzAK##9bfa
new BubbleSort(), =dx1/4bZl|
new SelectionSort(), !XzF67
new ShellSort(), > z^#
new QuickSort(), HdLH2+|P;D
new ImprovedQuickSort(), Ii:>xuF&
new MergeSort(), {iq3|x2[:
new ImprovedMergeSort(), -<_Ww\%8M
new HeapSort() {H{X[p8
}; #-GJ&m8
XduV+$03
public static String toString(int algorithm){ E(i[o?
return name[algorithm-1]; EFc-foN
} O%ug@& S{
W\L`5CW
public static void sort(int[] data, int algorithm) { "ax..Mh\y
impl[algorithm-1].sort(data); <u=4*:QE
} ^7.h%lSg
\fjMc }'
public static interface Sort { dqX;#H}h
public void sort(int[] data); _kY#D;`:r
} )nd\7|5#
H&yD*@
public static void swap(int[] data, int i, int j) { 5IbJ
int temp = data; UQ.7>Ug+8s
data = data[j]; ZlojbL@|4
data[j] = temp; EutP\K_Y
} nA~E "*
} U bYEEY#