[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; j<$2hiI/?&
} l,).p
int i1=l; HaYo!.(Fv
int i2=mid+1; ;*J
for(int cur=l;cur<=r;cur++){ xSu >
if(i1==mid+1) B5QFK
data[cur]=temp[i2++]; 5V-I1B&
else if(i2>r) wIgS3K
data[cur]=temp[i1++]; Bw.i}3UT6
else if(temp[i1] data[cur]=temp[i1++]; Bw yx c
else -\MG}5?!
data[cur]=temp[i2++]; FI.\%x
} d(K+);!
} I^]nqK
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} Dv6}bx(
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改进后的归并排序: wC*X4 '
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package org.rut.util.algorithm.support; VEH>]-0K
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import org.rut.util.algorithm.SortUtil; 05R@7[GWq
!@sUj
/** 2<6UwF
* @author treeroot p7~!z.)o
* @since 2006-2-2 !x)R=Z/C
* @version 1.0 k7^5Bp8=
*/ (k P9hcV
public class ImprovedMergeSort implements SortUtil.Sort { xD7]C|8o
+`15le`R
private static final int THRESHOLD = 10; OTv)
\7_y%HR
/* @VI@fN
* (non-Javadoc) V[V[~;Py
* qgB_=Q#E
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) @F>D+=hS
*/ [>9is=>o.
public void sort(int[] data) { i~72bMwsA
int[] temp=new int[data.length]; =pr7G+_u
mergeSort(data,temp,0,data.length-1); XP}<N&j
} ~M$Wd2Th
x~sBzTa
private void mergeSort(int[] data, int[] temp, int l, int r) { _v:SP LU
int i, j, k; #K&Gp-
int mid = (l + r) / 2; ` %}RNC
if (l == r) -RLOD\ZBh
return; ;@J}}h'y
if ((mid - l) >= THRESHOLD) (At$3b6
mergeSort(data, temp, l, mid); @+DX.9
else DfB7*+x{
insertSort(data, l, mid - l + 1); #Q5o)x
if ((r - mid) > THRESHOLD) tBSW|0
mergeSort(data, temp, mid + 1, r); R!1p^~/
else {)Xy%QV
insertSort(data, mid + 1, r - mid); j1Ezf=N6`
62u4-}JzF
for (i = l; i <= mid; i++) { ?4uL-z](V
temp = data; )gi9f1n`
} d5-qZ{W
for (j = 1; j <= r - mid; j++) { r<\u6jF
temp[r - j + 1] = data[j + mid]; }2oc#0
} X{VOAcugr
int a = temp[l]; ZC8wA;!z^
int b = temp[r]; ,u m|1dh
for (i = l, j = r, k = l; k <= r; k++) { DNi+"[~&P
if (a < b) { kT=8e;K
data[k] = temp[i++]; lxi<F
a = temp; [hsds\
} else { 8k79&|
data[k] = temp[j--]; P~dcW
b = temp[j]; =u;MCQ[
} P2Y^d#jO
} !9x}
} R-Sym8c
s^SJY{
/** >dT*rH3w
* @param data kVL.PY\K
* @param l 7z-[f'EIUI
* @param i pk~WrqK}
*/ M=Wz
private void insertSort(int[] data, int start, int len) { )e{}V\;q
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); QW"! (`K
} Pz^544\~ou
} $!DpjN
} _B0L.eF
} ?Ob3tUz2
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堆排序： _f{{( 7
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package org.rut.util.algorithm.support; s`UJ1eJ
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import org.rut.util.algorithm.SortUtil; SAz
=">NQ)98u
/** Mp]rUPK
* @author treeroot pJ{Y lS{
* @since 2006-2-2 W>LR\]Ti@
* @version 1.0 D,6:EV"sa
*/ t&p|Ynz?i
public class HeapSort implements SortUtil.Sort{ Dzbz)Zst
3a|\dav%
/* (non-Javadoc) m kexc~l
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) oU/5 a>9~
*/ 3oqHGA:}
public void sort(int[] data) { ##{taR8
MaxHeap h=new MaxHeap(); (w{j6).3Dj
h.init(data); %3rP`A
for(int i=0;i h.remove(); -HuA \0J
System.arraycopy(h.queue,1,data,0,data.length); YzWz|
} #Dac~>a'
*h|U,T7ew
private static class MaxHeap{ A=4OWV?
j39wA~K
void init(int[] data){ g+lCMW\
this.queue=new int[data.length+1]; Z{R>
for(int i=0;i queue[++size]=data; U6VKMxSJ
fixUp(size); Yw9GN2AG
} ry!!9Z>9n
} W4N{S.#!
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private int size=0; j@9T.P1
;);kEq/=P
private int[] queue; h\e.e3/
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public int get() { *2?@ |<(r
return queue[1]; &FD>&WRV
} iB{V^ksU
fIF8%J ^3
public void remove() { 7 3m1
SortUtil.swap(queue,1,size--); $^P0F9~0
fixDown(1); yjAL\U7`T
} 7L??ae
file://fixdown ]-q;4.
private void fixDown(int k) { #F#%`Rv1
int j; A's{j7
while ((j = k << 1) <= size) { g){<y~Mk
if (j < size %26amp;%26amp; queue[j] j++; RZ7@cQY
if (queue[k]>queue[j]) file://不用交换 >/|*DI-HJ
break; Uv.)?YeGh
SortUtil.swap(queue,j,k); 40/Y\
k = j; %LV9=!w
} ..qCPlK;
} grYe&(`X
private void fixUp(int k) { G?ZXWu.
while (k > 1) { weQ_*<5%
int j = k >> 1; /NlGFO*Z
if (queue[j]>queue[k]) yw!{MO
break; 2?5>o!C
SortUtil.swap(queue,j,k); q@qsp&0/
k = j; $k?>DP4
} Y}/-C3)
} P%6~&woF
: 'c&,oLY
} xmG<]WF>E
rc{v$.o0
} yLGRi^d#
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SortUtil： J1vR5wbu
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package org.rut.util.algorithm; g*Phv|kI
'7/)Ot(
import org.rut.util.algorithm.support.BubbleSort; B6"0OIDY"
import org.rut.util.algorithm.support.HeapSort; _+,TT['57s
import org.rut.util.algorithm.support.ImprovedMergeSort; gSgr6TH0
import org.rut.util.algorithm.support.ImprovedQuickSort; Gq6*SaTk
import org.rut.util.algorithm.support.InsertSort; <UI [%yXj
import org.rut.util.algorithm.support.MergeSort; <[phnU^ 8
import org.rut.util.algorithm.support.QuickSort; sS Mh`4'
import org.rut.util.algorithm.support.SelectionSort; JLYi]nZ
import org.rut.util.algorithm.support.ShellSort; %RVZD#zr
y(&Ac[foS}
/** )7d&NE_
* @author treeroot j [a(#V{
* @since 2006-2-2 ZoeD:xnh[
* @version 1.0 TV:9bn?r)
*/ Mhu*[a=;x
public class SortUtil { XuTD\g3)
public final static int INSERT = 1; O8o3O 6[Y
public final static int BUBBLE = 2; p'k0#R$
public final static int SELECTION = 3; (mOtU8e
public final static int SHELL = 4; dveiQ
public final static int QUICK = 5; 5\v3;;A[
public final static int IMPROVED_QUICK = 6; : +u]S2u{
public final static int MERGE = 7; &L:!VL{I
public final static int IMPROVED_MERGE = 8; GVz6-T~\>
public final static int HEAP = 9; Zc yc*{DS
?5p>BER?
public static void sort(int[] data) { N;R^h? '
sort(data, IMPROVED_QUICK); q| 7(
} ==B6qX8T
private static String[] name={ ,_P-$lB
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" b'y%n
}; edD)TpmE,
No$3"4wk
private static Sort[] impl=new Sort[]{ bLL2
new InsertSort(), FsPw1A$y
new BubbleSort(), :DNjhZ
new SelectionSort(), RNL9>7xV
new ShellSort(), "|NI]Kv
new QuickSort(), wq{hF<
new ImprovedQuickSort(), ;|RTx
new MergeSort(), Q/?$x*\>
new ImprovedMergeSort(), [KQi.u
new HeapSort() &[9709 (=
}; r^ XVB`v
jCY%|
public static String toString(int algorithm){ =AT."$r>
return name[algorithm-1]; %xW"!WbJ|
} fJ\[*5eiS
6b,V;#Anj
public static void sort(int[] data, int algorithm) { [;N'=]`
impl[algorithm-1].sort(data); "7 yD0T)2
} >~f]_puT
d5b% W3
public static interface Sort { N[hG8f
public void sort(int[] data); K:M8h{Ua
} =D(j)<9$A
h(4v8ae
public static void swap(int[] data, int i, int j) { pYg/Zm Jd
int temp = data; h1RSVp+?n
data = data[j]; "4Nt\WQ
data[j] = temp; +_!QSU,@
} ~Ei<Z`3}7"
} h;Kx!5)y