[JAVA]用Java实现的各种排序

ヾ1.嗰rёn

级别: 终身会员

发帖: 3743

铜板: 8

人品值: 493

贡献值: 9

交易币: 0

好评度: 3746

信誉值: 0

金币: 0

所在楼道

只看楼主更多操作楼层直达

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; MHKB:t]hA
} H0i\#)Xs
int i1=l; U9p^?\-=
int i2=mid+1; _a,XL<9I
for(int cur=l;cur<=r;cur++){ >~^##bIb
if(i1==mid+1) z?8Sie
data[cur]=temp[i2++]; 6 _\j_$
else if(i2>r) ihdtq
data[cur]=temp[i1++]; 3$ 1 z
else if(temp[i1] data[cur]=temp[i1++]; '$n#~/#}
else )hai?v~g
data[cur]=temp[i2++]; ;M Z@2CO
} [M6/?4\
} 8?7:sfc
iP~dH/B|v
} +bK.{1
lb('=]3 }H
改进后的归并排序: gJ>HFid_C
Af"vSL
package org.rut.util.algorithm.support; "A?_)=zZ
'%"#]
import org.rut.util.algorithm.SortUtil; p,w6D,h
>h m<$3
/** wc'K=;c
* @author treeroot lCyp&b#(L
* @since 2006-2-2 XL7jUi_4:L
* @version 1.0 n`hes_{,g
*/ s~6irf/
public class ImprovedMergeSort implements SortUtil.Sort { L"6@3
kY6))9 O
private static final int THRESHOLD = 10; -m~[z
\;A\ vQ[
/* D0&{iZ(
* (non-Javadoc) J;wA
* (8(z42
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) [2,u:0"
*/ 6gfdXVN5
public void sort(int[] data) { (7rG~d1iS
int[] temp=new int[data.length]; lFY;O !Y5\
mergeSort(data,temp,0,data.length-1); f V.(v&
} wFaWLC|&
}f6x>
private void mergeSort(int[] data, int[] temp, int l, int r) { !Jj=H()}
int i, j, k; YtrMJ"
int mid = (l + r) / 2; a;Y9wn
if (l == r) (Rk g
return; w`Dzk.2
if ((mid - l) >= THRESHOLD) EF{_-FXY
mergeSort(data, temp, l, mid); -3r&O:
else iV71t17
insertSort(data, l, mid - l + 1); Om0S^4y]x
if ((r - mid) > THRESHOLD) {hM*h(W~3
mergeSort(data, temp, mid + 1, r); 7c6-S@L
else }r/L 9
insertSort(data, mid + 1, r - mid); @]HV:7<q
JqH2c=}-
for (i = l; i <= mid; i++) { OX4+1@$tk
temp = data; m-a_<xo
} ?^&!/,
for (j = 1; j <= r - mid; j++) { ls6ywLP{
temp[r - j + 1] = data[j + mid]; s^9N7'
} "FaG5X(
int a = temp[l]; RS/%uxS?
int b = temp[r]; <..%@]+
for (i = l, j = r, k = l; k <= r; k++) { f|FQd3o)
if (a < b) { _wf"E(c3D
data[k] = temp[i++]; 0r=Lilu{q
a = temp; nx,67u/Pb
} else { N_r*Ig
data[k] = temp[j--]; b\?#O}
b = temp[j]; 3<msiCP
} {R,rc!yF
} %2oLND}?z
} h{ce+~X
H$ xSl1>E
/** tO?*x/XC{
* @param data s$:]$&5
* @param l 4aB`wA^x
* @param i Y@u{73H
*/ 7XWgY%G
private void insertSort(int[] data, int start, int len) { =fi.*d?$7
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); V|HSIJ#J
} >KH4X:
} j&m<=-q
} xyz-T1ib
} !,\9,lc
QbqLj>-AJ
堆排序： :N)7SYQT
INzQ0z-z
package org.rut.util.algorithm.support; !1"~tA!+p=
`U`Z9q5-
import org.rut.util.algorithm.SortUtil; a$t [}D2
_I|wp<R
/** S_2I8G^A
* @author treeroot e@^}y4 C
* @since 2006-2-2 uNhAfZ
* @version 1.0 -3_kS/
*/ eB$v'9S8/
public class HeapSort implements SortUtil.Sort{ .FHOOw1r=
",8h>eEWK
/* (non-Javadoc) ;{Z2i%
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) A7_*zR@
*/ ,%nmCetD@
public void sort(int[] data) { ~P6K)V|@<
MaxHeap h=new MaxHeap(); 9R;s;2$.
h.init(data); [EGE|
for(int i=0;i h.remove(); $X*$,CCIB
System.arraycopy(h.queue,1,data,0,data.length); //Tr=!TQu
} Bdbw!zRR$
JBUJc
private static class MaxHeap{ " 31C8
9CBB,
void init(int[] data){ V(!b!i@
this.queue=new int[data.length+1]; [V jd)%
for(int i=0;i queue[++size]=data; y'yaCf
fixUp(size); ha8do^x
} -U/&3
} ^2^ptQj
q9WSQ$:z8
private int size=0; 5K6_#g4"
& bw1
private int[] queue; s:]rL&|
,$;CII v
public int get() { .=@M>TZM
return queue[1]; `XWxC:j3%
} bh7 1Zu
& vLX
public void remove() { 3?5 ~KxOE(
SortUtil.swap(queue,1,size--); ;:$Na=
fixDown(1); ":-)mfgGU
} A<.Q&4jb
file://fixdown #sqDZ]\B
private void fixDown(int k) { M;43F*
int j; *=|i"
while ((j = k << 1) <= size) { ^~`8 - TE
if (j < size %26amp;%26amp; queue[j] j++; P^h2w%6'
if (queue[k]>queue[j]) file://不用交换 7L-%5:1%
break; ryn)
SortUtil.swap(queue,j,k); [Z5x_.k"I
k = j; +.lO8
} W>DpDrO4ml
} +j@|D@z
private void fixUp(int k) { M2zfN ru
while (k > 1) { dU&.gFw1
int j = k >> 1; >$Fc=~;Ba
if (queue[j]>queue[k]) H`Z4a N
break; #!`zU4&2
SortUtil.swap(queue,j,k); IYCKF/2o
k = j; s)M2Z3>+
} R<U?)8g,h~
} 2bxT%xH:g
xwRnrWd^6
} A|>C3S
q90S>c,
} NI^Y%N
2Qy!Aa
SortUtil： yZ!Eu#81
)$]+R?v
package org.rut.util.algorithm; } 1XLe
%~W}262
import org.rut.util.algorithm.support.BubbleSort; ?&GMp[
import org.rut.util.algorithm.support.HeapSort; .y\HQ^j
import org.rut.util.algorithm.support.ImprovedMergeSort; Maa.>2v<
import org.rut.util.algorithm.support.ImprovedQuickSort; rL,)Tc|"
import org.rut.util.algorithm.support.InsertSort; YwF6/JA0^
import org.rut.util.algorithm.support.MergeSort; =6W:O
import org.rut.util.algorithm.support.QuickSort; H_AV3 ;
import org.rut.util.algorithm.support.SelectionSort; VG8rd'Z
import org.rut.util.algorithm.support.ShellSort; - 5k4vx N}
j qdI=!H
/** tm|lqa
* @author treeroot &iGl)dDr
* @since 2006-2-2 Ov<3?)ok
* @version 1.0 KOmP-q=6
*/ R_1C+
public class SortUtil { }agl:~C
public final static int INSERT = 1; Q./lX:
public final static int BUBBLE = 2; #P4dx'vm
public final static int SELECTION = 3; |,7J!7T(I
public final static int SHELL = 4; xBZ9|2Y s
public final static int QUICK = 5; sTA/2d
public final static int IMPROVED_QUICK = 6; JyqFFZ&
public final static int MERGE = 7; U.)G#B
public final static int IMPROVED_MERGE = 8; "aBd0i&
public final static int HEAP = 9; ( Lu.^
QhG-1P3#
public static void sort(int[] data) { eFnsf}(Iy
sort(data, IMPROVED_QUICK); hZ'oCRM
} ,|#>X>^FQQ
private static String[] name={ #VOjnc/rW
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" j^ _I{
}; :HE]P)wz-
vl5n%m H>^
private static Sort[] impl=new Sort[]{ 9V],X=y~
new InsertSort(), pNqf2CnnT
new BubbleSort(), epR~Rlw>2
new SelectionSort(), #LN I&5
new ShellSort(), YEQW:r_h.S
new QuickSort(), &V?q d{39
new ImprovedQuickSort(), Hr+-ndH!Pq
new MergeSort(), bg,}J/
new ImprovedMergeSort(), l'W+^
new HeapSort() b66X])+4jE
}; `Q&]dE=
i)2))C
public static String toString(int algorithm){ f)zg&Ib
return name[algorithm-1]; K7hf m%`N
} ~t:b<'/
B (1,Rq[
public static void sort(int[] data, int algorithm) { z/YMl3$l~
impl[algorithm-1].sort(data); Ib2@Wi
} Q@2tT&eL
8`G{1lr4o
public static interface Sort { t%U[\\ic
public void sort(int[] data); VM]IL%AN
} M?B(<j1Ri
z}1xy+
public static void swap(int[] data, int i, int j) { &#@>(u:.
int temp = data; UNQRtR/
data = data[j]; kP)o=\|W{z
data[j] = temp; w"v'dU^
} <KwK tgzs
} x~;EH6$5'/