[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; %_{tzXim
} QzzW x2
int i1=l; "(3BvMA&!9
int i2=mid+1; J]G?Rc
for(int cur=l;cur<=r;cur++){ vt;{9\Y
if(i1==mid+1) =}v}my3y"
data[cur]=temp[i2++]; bD[!/'4eJ
else if(i2>r) HN.3
data[cur]=temp[i1++]; ,>:;#2+og
else if(temp[i1] data[cur]=temp[i1++]; ]"1`+q6i
else NyVnA
data[cur]=temp[i2++]; YR>B_,Gl
} z-LB^kc8oQ
} Ircp``g
@W^| ?
} DVK)2La
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改进后的归并排序: )Jk0v_ X
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package org.rut.util.algorithm.support; 6q]5Es<
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import org.rut.util.algorithm.SortUtil; BVr0Gk
zD(`B+
/** L. EiO({W
* @author treeroot cu%C"
* @since 2006-2-2 ( @3\`\X
* @version 1.0 #%D_Y33;
*/ kH4Ai3#g
public class ImprovedMergeSort implements SortUtil.Sort { {2+L@
r4QxoaM
private static final int THRESHOLD = 10; g q}I[N
@~#Ym1{W
/* .h& .K
* (non-Javadoc) 7hi"6,
* ]]&M@FM2z
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ,daKC
*/ @E-\ J7 yh
public void sort(int[] data) { UY<e&Npo
int[] temp=new int[data.length]; &CIVL#];e
mergeSort(data,temp,0,data.length-1); ~,BIf+\XF
} .>mr%#p
jWY$5Vq<H
private void mergeSort(int[] data, int[] temp, int l, int r) { 13+<Q \
int i, j, k; 0%Z]h?EYy|
int mid = (l + r) / 2; .%^]9/4
if (l == r) :pF_GkG
return; N @#c,,
if ((mid - l) >= THRESHOLD) 9!Ar`Io2@
mergeSort(data, temp, l, mid); G <uyin>
else VB?Ohk]<
insertSort(data, l, mid - l + 1); y8 KX<2s1
if ((r - mid) > THRESHOLD) }4{fQ`HT
mergeSort(data, temp, mid + 1, r); ~O]]N;>72"
else 5 gv/Pq&
insertSort(data, mid + 1, r - mid); x&`~R>5/
fnNYX]_bk
for (i = l; i <= mid; i++) { (C\hVy2X?N
temp = data; N,f4*PQ
} gi-Yqco
for (j = 1; j <= r - mid; j++) { v0kqu
temp[r - j + 1] = data[j + mid]; A)~X,
} 1=nUW":
int a = temp[l]; XgxX.`H7
int b = temp[r]; ]/!<PF
for (i = l, j = r, k = l; k <= r; k++) { |8.(XsN
if (a < b) { sz9G3artK&
data[k] = temp[i++]; a3VM'
a = temp; 3 AHY|
} else { e{A9r@p!
data[k] = temp[j--]; I0'[!kBF|
b = temp[j]; wBInq~K_
} _kdL'x
} ] )"u+
} >^OC{~Az
}HG#s4
/** ~-#yOu ,w
* @param data e|rg;`AW
* @param l 37q@rDm2
* @param i $XU5??8
*/ ZZj~GQL(S
private void insertSort(int[] data, int start, int len) { NB7Y{) w
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ^@"H1
} >F@qpjoQE
} k;EPpr-{
} k78Vh$AA6%
} ;ml 3
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堆排序： 97,rE$bC
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package org.rut.util.algorithm.support; lg}HGG
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import org.rut.util.algorithm.SortUtil; Dl&GJ`&:p
]O TH"*j
/** m,R Dr
* @author treeroot r{sebE\ ;
* @since 2006-2-2 aP&D9%5
* @version 1.0 Q*YYTmZ
*/ XYH|;P6K
public class HeapSort implements SortUtil.Sort{ vMs;>lhtg
QJW`}`R
/* (non-Javadoc) &W6^6=E{g
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) +-a&2J;J'
*/ tQ~WEC
public void sort(int[] data) { -z:&*=
MaxHeap h=new MaxHeap(); &48_2Q"{
h.init(data); WV"jH9"[
for(int i=0;i h.remove(); AY SSa 1}
System.arraycopy(h.queue,1,data,0,data.length); kJ(A,s|
} }sxn72,
Vh<A2u3&
private static class MaxHeap{ <8#ObdY!
`*\{.;,]#
void init(int[] data){ U,lJ"$'
this.queue=new int[data.length+1]; #*c F8NV-
for(int i=0;i queue[++size]=data; &*&?0ov^"
fixUp(size); cE{ =(OQ
} . -"E^f
} gcJF`H/iNK
"%@uO)A /
private int size=0; Ra3ukYG[
15zrrU~D
private int[] queue; ^*^/]vM
}'=h4yI
public int get() { sl/)|~3!8
return queue[1]; #vf_D?^
} D6Y6^eS-
n+D#k 8{
public void remove() { \h3e-)
SortUtil.swap(queue,1,size--); ACV ek
fixDown(1); sFb4`
} l[/q%Ca'>
file://fixdown >sj bK%
private void fixDown(int k) { cCxi{a1uo
int j; 3D)b*fPc
while ((j = k << 1) <= size) { `ycU-m==
if (j < size %26amp;%26amp; queue[j] j++; ~4)Y#IxL
if (queue[k]>queue[j]) file://不用交换 sIm#_+Y
break; djT. 1(
SortUtil.swap(queue,j,k); 9DEh*%q
k = j; [BBpQN.^q6
} 5#_tE<uM
} &.*uc|{
private void fixUp(int k) { cD{8|B*
while (k > 1) { k_3j '
int j = k >> 1; x.EgTvA&d
if (queue[j]>queue[k]) 7aQcP
break; D&*LBQ/K
SortUtil.swap(queue,j,k); 8mgQu]>
k = j; " OGdE_E
} viuiqs5[Bi
} 2q%K)h
JfTfAq]
} \8"QvC]
V_;9TC
} \>)f5 gV@
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SortUtil： @8"18HEp#
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package org.rut.util.algorithm; F14(;'Az
pN$;!
import org.rut.util.algorithm.support.BubbleSort; w4{y"A
import org.rut.util.algorithm.support.HeapSort; j,t~
import org.rut.util.algorithm.support.ImprovedMergeSort; ck$2Ue2`@w
import org.rut.util.algorithm.support.ImprovedQuickSort; 6;JP76PD
import org.rut.util.algorithm.support.InsertSort; 5.k}{{+
import org.rut.util.algorithm.support.MergeSort; |mj# 0
import org.rut.util.algorithm.support.QuickSort; a9[<^
import org.rut.util.algorithm.support.SelectionSort; O3ZM:,.
import org.rut.util.algorithm.support.ShellSort; '\L0xw4
d_iY&-gq/
/** {NeWdC
* @author treeroot Wy(pLBmb
* @since 2006-2-2 XOxB (0@
* @version 1.0 2 `5=0E1k
*/ rBevVc![
public class SortUtil { E0`[G]*G
public final static int INSERT = 1; !~d'{sy6
public final static int BUBBLE = 2; (zmNa}-
public final static int SELECTION = 3; kZK//YN#
public final static int SHELL = 4; taCCw2s-8*
public final static int QUICK = 5; 0IFlEe[>#
public final static int IMPROVED_QUICK = 6; 0l1.O2-
public final static int MERGE = 7; lzoeST
public final static int IMPROVED_MERGE = 8; V5Xi '=
public final static int HEAP = 9; e;;):\p4
A|C_np^z2
public static void sort(int[] data) { 0h:G4
sort(data, IMPROVED_QUICK); leIy|K>\m
} &>V/X{>$`K
private static String[] name={ \kk!Dz*H
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" F8 ?uQP8
}; <c\]Ct
Q,n4i@E
private static Sort[] impl=new Sort[]{ d|3o/@k
new InsertSort(), #~1wv^
new BubbleSort(), =Pj@g/25u
new SelectionSort(), YnD#p[Wo^
new ShellSort(), S"{GlRpd
new QuickSort(), H1C%o0CPY
new ImprovedQuickSort(), 08O7F
new MergeSort(), 9H[/Tj-;
new ImprovedMergeSort(), W'V@
new HeapSort() pEkOSG
}; } m6\C5
+.wT 9kFcc
public static String toString(int algorithm){ k}-]W@UCa?
return name[algorithm-1]; :Dt\:`(r'
} v#-E~;CcC
. Jb?]n
public static void sort(int[] data, int algorithm) { Fj,(_^
impl[algorithm-1].sort(data); h*G#<M
} .P8-~?&M
;{]8>`im&4
public static interface Sort { m]1!-`(*
public void sort(int[] data); Kc-Y
} ^~, ndH{
:4{Qh
public static void swap(int[] data, int i, int j) { /<6ywLD
int temp = data; }}s8D>;G~
data = data[j]; ckAsGF_B~!
data[j] = temp; V8\$`NEP
} :cEd[Jm9
} -!i;7[N