[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; x1['+!01
} HX1RA5O
int i1=l; w6C0]vh
int i2=mid+1; :S Tj <
for(int cur=l;cur<=r;cur++){ B+:'Ld](
if(i1==mid+1) 1EvAV,v"
data[cur]=temp[i2++]; V=!tZ[4z$h
else if(i2>r) 6?-vj2,
data[cur]=temp[i1++]; Kyy CS>
else if(temp[i1] data[cur]=temp[i1++]; "S6'<~s
else g~FA:R
data[cur]=temp[i2++]; ya7/&Z )0
} CRy;>UI
} r+8%oWj
r5ONAa3.
} wOH$S=Ba5,
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改进后的归并排序: X}?`G?'
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package org.rut.util.algorithm.support; j6wdqa9!~
Hm=!;xAFX
import org.rut.util.algorithm.SortUtil; VEAf,{)Q
eNN)2-96
/** s;-(dQ{O
* @author treeroot `TNWLD@Z
* @since 2006-2-2 Gv,_;?7lD
* @version 1.0 8=;'kEU
*/ %{$iN|%J%$
public class ImprovedMergeSort implements SortUtil.Sort { P$E#C:=
zcCX;N
private static final int THRESHOLD = 10; ha6jbni
T/NeoU3 p
/* KCR6@{@
* (non-Javadoc) \$o5$/oU(
* 8r@_b
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) <uUHr,#
*/ wfH#E2+pk
public void sort(int[] data) { 6C6<,c
int[] temp=new int[data.length]; `]L&2RS
mergeSort(data,temp,0,data.length-1); 69)- )en
} 8c-r;DE
5c?1JH62o8
private void mergeSort(int[] data, int[] temp, int l, int r) { O)g\/uRy
int i, j, k; >3R)&N
int mid = (l + r) / 2; , VT&
if (l == r) ml=tS,
return; -nP y?>p"|
if ((mid - l) >= THRESHOLD) AS[yNCsjC
mergeSort(data, temp, l, mid); ^O_E T$
else XV"8R"u%Q
insertSort(data, l, mid - l + 1); feOX]g#
if ((r - mid) > THRESHOLD) qx3@]9
mergeSort(data, temp, mid + 1, r); $[5S M>e]
else &)?ECj0`
insertSort(data, mid + 1, r - mid); -ea":}/
EHByo[
for (i = l; i <= mid; i++) { <-xI!o"}
temp = data; \{W}
} \A@Mlpe&t
for (j = 1; j <= r - mid; j++) { ,Y|WSKY*
temp[r - j + 1] = data[j + mid]; d{?X:*F
} LF\4>(C2g
int a = temp[l]; .t\#>Fe
int b = temp[r]; }Gmwm|`*
for (i = l, j = r, k = l; k <= r; k++) { |E/r64T
if (a < b) { `w@8i[2J
data[k] = temp[i++]; &)4#0L4
a = temp; E! '|FJ
} else { p^u;]~JO
data[k] = temp[j--]; &rY73qfP'
b = temp[j]; 'CiV=&3/
} .W[ 9G\
} hV,)u3
} ~(Wq 5<v
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/** 7`113`1
* @param data R-Y07A
* @param l oWg"f*
* @param i {C6,h#|pg
*/ E1)7gio
private void insertSort(int[] data, int start, int len) { ygiZ~v4P/
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); O,m0Xb2s]~
} i,5mH$a&u:
} hS<lUG!9UJ
} Gw4~
} C"`,?K(U
9?8Yf(MC%u
堆排序： no6q3<re
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package org.rut.util.algorithm.support; H_H3Gp
O}Y& @V%4k
import org.rut.util.algorithm.SortUtil; `_`\jd@
{G _ :#cep
/** m0*bz5
* @author treeroot XxXMtiZ6
* @since 2006-2-2 1ztL._Td
* @version 1.0 ?];?3X~|
*/ /G}TPXA
public class HeapSort implements SortUtil.Sort{ /l o;:)AiP
?)x"+[2
/* (non-Javadoc) )YSS>V
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ;[pY>VJ(
*/ b#XY.+ *0
public void sort(int[] data) { WX@a2c.'
MaxHeap h=new MaxHeap(); N@Fof(T&
h.init(data); NJ6* 7Cd
for(int i=0;i h.remove(); 6x?3%0Km
System.arraycopy(h.queue,1,data,0,data.length); *^|.bBG
} AmSrc.
^*!Tq&Dst|
private static class MaxHeap{ 0O,Q]P 82f
IIrp-EMXJ
void init(int[] data){ $CT2E
this.queue=new int[data.length+1]; [nL{n bli
for(int i=0;i queue[++size]=data; u">KE6um
fixUp(size); fa~4+jx>S
} >x/;'Y.
} s/' ]* n
v[P $c$Xi
private int size=0; Pra,r9h,
{,kA'Px)
private int[] queue; ZboY]1L[j
VZ69s{/.B
public int get() { ?4G/f<ou
return queue[1]; NT3Ti ?J,
} ?g7O([*[
tQTVP2:Y
public void remove() { Gp&o
SortUtil.swap(queue,1,size--); tCoT-\Q
fixDown(1); st91rV$y?
} 25bLU?x5B
file://fixdown ZA1u
private void fixDown(int k) { D\"F?>
int j; #`kLU:
while ((j = k << 1) <= size) { K<#Q;(SFU
if (j < size %26amp;%26amp; queue[j] j++; ~Vh< mt
if (queue[k]>queue[j]) file://不用交换 1m c'=S{
break; c-?2>%;(V
SortUtil.swap(queue,j,k); luPj'd?
k = j; D' d^rT| H
} 1/hk3m(C
} tN-U,6c]
private void fixUp(int k) { *3A`7usU
while (k > 1) { BH@b]bEJ
int j = k >> 1; Hu4\4x$?
if (queue[j]>queue[k]) M.*3qWM
break; 'h]sq{
SortUtil.swap(queue,j,k); at(oepq
k = j; ;s$bVGHr
} GxFmw:
} BAy]&q|.
wO>P<KBU
} d z-
RxeyMNd
} #KFpT__F
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SortUtil： mmf}6ABYT
XkGS3EY
package org.rut.util.algorithm; .YYLMI
J.t tJOP
import org.rut.util.algorithm.support.BubbleSort; pb`!_GmB
import org.rut.util.algorithm.support.HeapSort; E:!qncL:
import org.rut.util.algorithm.support.ImprovedMergeSort; xD|/98
import org.rut.util.algorithm.support.ImprovedQuickSort; aC2cyUuaN
import org.rut.util.algorithm.support.InsertSort; ZJZKCdT@
import org.rut.util.algorithm.support.MergeSort; 06r-@iY.]
import org.rut.util.algorithm.support.QuickSort; @_:Jm tH<
import org.rut.util.algorithm.support.SelectionSort; |_ChK6Q?v
import org.rut.util.algorithm.support.ShellSort; =~|:93]k
Zo12F**{
/** 2PaRbh{"
* @author treeroot *F_ dP
* @since 2006-2-2 nKR=/5a4Y
* @version 1.0 krt8yAkG
*/ y?r:`n
public class SortUtil { {(00,6M)i
public final static int INSERT = 1; h3udS{9'8
public final static int BUBBLE = 2; \os iY^
public final static int SELECTION = 3; 5:T)hoF@
public final static int SHELL = 4; MhaoD5*9
public final static int QUICK = 5; ~WKcO&
public final static int IMPROVED_QUICK = 6; 94Hs.S)
public final static int MERGE = 7; "{1SDbwmMo
public final static int IMPROVED_MERGE = 8; Ho_ 2zx:8b
public final static int HEAP = 9; mh5ozv$
+6i~Rx>
public static void sort(int[] data) { ue/GB+U
sort(data, IMPROVED_QUICK); $$GmundqB
} ` 6'dhB
private static String[] name={ 0P%,1M3d
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" _7k6hVQ
}; 0Na/3cz|zg
3lW7auH4Y{
private static Sort[] impl=new Sort[]{ udjahI<{
new InsertSort(), })Pq!u:3
new BubbleSort(), -\2T(3P
new SelectionSort(), reU*apZ/
new ShellSort(), #JLxM/5^1~
new QuickSort(), GELxS!
new ImprovedQuickSort(), F:vHbs `y
new MergeSort(), {&qB!axj
new ImprovedMergeSort(), VQMPs{tm
new HeapSort() dM^1O-K:
}; v[}g+3a
\/ 9s<
public static String toString(int algorithm){ s?}m~Pl
return name[algorithm-1]; |IgH0 zZ
} l+V#`S*q
h^`!kp
public static void sort(int[] data, int algorithm) { R, J(]ew
impl[algorithm-1].sort(data); doj$chy
} (:TZ~"VY
?F!='6D}b
public static interface Sort { n>5/y c"/q
public void sort(int[] data); i#RT4}l"a
} <z2*T \B!8
f(}AdW}?
public static void swap(int[] data, int i, int j) { MU-T>S4
int temp = data; HAHLF+k
data = data[j]; j)vfI>
data[j] = temp; 1~|o@CO
} 8}A+{xVp8
} J8>8@m6