[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; |KkVt]ZQe9
} oS]XE!^M
int i1=l; Dzp9BRS 2f
int i2=mid+1; 1[^2f70n
for(int cur=l;cur<=r;cur++){ 8_:jPd!3
if(i1==mid+1) z5Po,@W
data[cur]=temp[i2++]; 2"2b\b}my
else if(i2>r) =>ignoeI
data[cur]=temp[i1++]; NBLOcRSh
else if(temp[i1] data[cur]=temp[i1++]; j]kx~
else 2vK{Yw
data[cur]=temp[i2++]; "&>$/b$
} &"25a[x{B
} tcmG>^YM
{@({po
} ]ul]L R%.
aP2
改进后的归并排序: |>d56
!K3 #4
package org.rut.util.algorithm.support; sg2T)^*V
( vgoG5
import org.rut.util.algorithm.SortUtil; (?$}Vp
$n>.;CV
/** 8+lM6O ~!
* @author treeroot <@JK;qm>S
* @since 2006-2-2 RW%e%
* @version 1.0 3d \bB !
*/ |r6<DEg
public class ImprovedMergeSort implements SortUtil.Sort { X}_kLfP/9
&;*jMu6
private static final int THRESHOLD = 10; &i6WVNGy
k;q|pQ[
/* Xul<,U~w6
* (non-Javadoc) c"6<p5j!
* /\OjtE
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) \V}?K0#bt
*/ #dU-*wmJ
public void sort(int[] data) { -2bu`oD `
int[] temp=new int[data.length]; \_0nH`
mergeSort(data,temp,0,data.length-1); t13wQt
} U^:+J-z{
2Fp.m}42i(
private void mergeSort(int[] data, int[] temp, int l, int r) { qMKXS,s
int i, j, k; O cd ^{u
int mid = (l + r) / 2; 1Hk`i%
if (l == r) uq{w1O5
return; O~trv,?)
if ((mid - l) >= THRESHOLD) -NHc~=m
mergeSort(data, temp, l, mid); ?%#3p[
else [gx6e 44
insertSort(data, l, mid - l + 1); wxN'Lv=R
if ((r - mid) > THRESHOLD) t4~Bn<=
mergeSort(data, temp, mid + 1, r); evz{@;.R
else W(Xb]t=19
insertSort(data, mid + 1, r - mid); eM{,B
ms`R^6Ra
for (i = l; i <= mid; i++) { YyjnyG
temp = data; sO,,i]a0
} &O7]e3Ej
for (j = 1; j <= r - mid; j++) { p^<*v8,~7
temp[r - j + 1] = data[j + mid]; ~/C9VR&
} "}*5'e.*
int a = temp[l]; u]0{#wu;g
int b = temp[r]; ]WFr5
for (i = l, j = r, k = l; k <= r; k++) { Z#uxa
if (a < b) { i=3~ h Zl
data[k] = temp[i++]; g&&-
a = temp; g A+p^`;[
} else { Y.yiUf/Q
data[k] = temp[j--]; AdU0 sZ+&c
b = temp[j]; _"l2UDx
} f^Io:V\
} t9l]ie{"o.
} r_>]yp
T"IDCT'z
/** {gT4Oq__
* @param data /dI8o
* @param l d%,@,>>)
* @param i uE &/:+
*/ Y' FB {
private void insertSort(int[] data, int start, int len) { 80_}}op?8
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); d#(ffPlq
} +,c]FAx4
} MZd?cS
} LS:^K
} 7H])2:)
u!CcTE*
堆排序： {q!GTO
(4f]<Qt
package org.rut.util.algorithm.support; 3QhQpPk),
k^@dDLr"
import org.rut.util.algorithm.SortUtil; #IvHxSo&
3-Bz5sj9
/** 0?,<7}"<X
* @author treeroot S\M+*:7
* @since 2006-2-2 KOhK#t>H@0
* @version 1.0 b9R0"w!ml
*/ PRal>s&f
public class HeapSort implements SortUtil.Sort{ j82x$I*
e+~@"^|
/* (non-Javadoc) q:cCk#ra
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) -JfqY?Ue_2
*/ `c)[aP{vN
public void sort(int[] data) { {[pzqzL6
MaxHeap h=new MaxHeap(); J7pF*2
h.init(data); ]xxE_B7
for(int i=0;i h.remove(); ]y9u5H^
System.arraycopy(h.queue,1,data,0,data.length); `T,^os#6
} 7I/a
)">uI\bi
private static class MaxHeap{ oM^VtH=>
z!G?T(SpA
void init(int[] data){ l@:&0id4I
this.queue=new int[data.length+1]; j4wsDtmAU
for(int i=0;i queue[++size]=data; "M3S
fixUp(size); A'aYH`j
} O03N$Jq A
} dvcLZK
50e vWD
private int size=0; uCHM
a! 3eZ,
private int[] queue; LGh#
HDi_|{2^
public int get() { "cwvx8un
return queue[1]; f"-3'kqo
} GJ\bZ"vDo
*+TO%{4
public void remove() { h$]nfHi_Q
SortUtil.swap(queue,1,size--); )YVs=0j
fixDown(1); $sFqMy
} #AH gY.
file://fixdown l0r^LK$
private void fixDown(int k) { p`Ok(C_
int j; r ?<?0j
while ((j = k << 1) <= size) { fQxlYD'peb
if (j < size %26amp;%26amp; queue[j] j++; Z|B`n SzH
if (queue[k]>queue[j]) file://不用交换 Gs/G_E(T
break; ,(B/R8ZF~
SortUtil.swap(queue,j,k); emHaZhh
k = j; p ~pl|
} "^)$MAZ
} /Yj; '\3
private void fixUp(int k) { pS "A{k)i
while (k > 1) { *SYuq)
int j = k >> 1; 4N)45@jk[
if (queue[j]>queue[k]) " 1h~P,
break; 5Mp$u756
SortUtil.swap(queue,j,k); 06 an(&a9
k = j; z s\N)LyM
} p^C$(}Yh
} 7O~hA*Z
.[ s6x5M
} HggINMG
\0;EHB
} &hEkm
JSoInR1E
SortUtil： ikb;,Js
:j[=
package org.rut.util.algorithm; )0\D1IFJ
"td ,YVK
import org.rut.util.algorithm.support.BubbleSort; ]u\-_PP
import org.rut.util.algorithm.support.HeapSort; K_Kz8qV.?
import org.rut.util.algorithm.support.ImprovedMergeSort; nj#kzD[n>
import org.rut.util.algorithm.support.ImprovedQuickSort; })?KpYk
import org.rut.util.algorithm.support.InsertSort; /&em%/
import org.rut.util.algorithm.support.MergeSort; xf;Tk
import org.rut.util.algorithm.support.QuickSort; C;YtMY:
import org.rut.util.algorithm.support.SelectionSort; qgxGq(6K
import org.rut.util.algorithm.support.ShellSort; :n OCs
g6h=Q3@
/** Yq:+.UU
* @author treeroot l]L"Ex{
* @since 2006-2-2 $VeQvm*
* @version 1.0 L;U?s2&Y
*/ &S[>*+}{+
public class SortUtil { z J V>;
public final static int INSERT = 1; G)gPL]C0
public final static int BUBBLE = 2; BSY7un+`:
public final static int SELECTION = 3; km,@yU
public final static int SHELL = 4; nu X`>Oy
public final static int QUICK = 5; *>T@3G.{Rm
public final static int IMPROVED_QUICK = 6; `pXPF}T
public final static int MERGE = 7; /~+j[oB
public final static int IMPROVED_MERGE = 8; op,mP0b
public final static int HEAP = 9; vv D515i
q+)s
public static void sort(int[] data) { ]x@36Ok)A
sort(data, IMPROVED_QUICK); rW2l+:@c
} -e.ygiK.`S
private static String[] name={ -K4uqUp
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" >L^2Z*
}; ]eI|_O^u
ej[Y `N
private static Sort[] impl=new Sort[]{ |iVw7M:
new InsertSort(), +L pMNnl6
new BubbleSort(), 85{@&T
new SelectionSort(), V7?Pv Q
new ShellSort(), Vah.tOU
new QuickSort(), Zzv,p
new ImprovedQuickSort(), (kJ"M4*<F'
new MergeSort(), fRt&-z('
new ImprovedMergeSort(), qbo W<W<H1
new HeapSort() O*1la/~m
}; u:>*~$f
?ehUGvV2
public static String toString(int algorithm){ (y?`|=G-xT
return name[algorithm-1]; wTn"
} cC$E"m
`3vt.b
public static void sort(int[] data, int algorithm) { b@[\+P] "
impl[algorithm-1].sort(data); JjG>$z
} !%'c$U2
2w:cdAv$
public static interface Sort { _'P!>C!
public void sort(int[] data); I z)~h>-F
} $,jynRk7q
l_ycB%2e^
public static void swap(int[] data, int i, int j) { Gl5W4gW;&
int temp = data; SI;SnF'[7
data = data[j]; vUgo)C#<
data[j] = temp; lLZ?&z$
} !{4bC
} tkEup&