[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; jV/CQM5a+
} >;#=gM
int i1=l; y?)}8T^
int i2=mid+1; Jj=;
for(int cur=l;cur<=r;cur++){ WA$>pG5s
if(i1==mid+1) `Rdm-[&
data[cur]=temp[i2++]; z**hD2R!
else if(i2>r) oR~e#<$;
data[cur]=temp[i1++]; 97,rE$bC
else if(temp[i1] data[cur]=temp[i1++]; YxGcFjJ
else Otz E:qe
data[cur]=temp[i2++]; -L3|&O_
} ]=EM@
} 7JDN{!jT
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} tURc bwV
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改进后的归并排序: m3^/:<
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package org.rut.util.algorithm.support; BYM3jXWi0v
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import org.rut.util.algorithm.SortUtil; 3:5DL!Sm8J
&6j<ca
/** erl:9.
* @author treeroot hAqg Iu*
* @since 2006-2-2 >|o_wO
* @version 1.0 e/8z+H^H
*/ /U$8TT8+-
public class ImprovedMergeSort implements SortUtil.Sort { 45@]:2j
5y} v{Ijt
private static final int THRESHOLD = 10; C*X G_b ]
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/* }K(o9$V ^!
* (non-Javadoc) WV"jH9"[
* 6] z}#"
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) )B!d,HKt;
*/ A K/z6XGy
public void sort(int[] data) { Zw] ?.
int[] temp=new int[data.length]; XTeb9h)3
mergeSort(data,temp,0,data.length-1); CodSJ,
} ;50_0Mv;(:
*8ExRQZ$
private void mergeSort(int[] data, int[] temp, int l, int r) { `*\{.;,]#
int i, j, k; .9|uQEL
int mid = (l + r) / 2; 3_`szl-
if (l == r) l12$l<x&M
return; (X6sSO
if ((mid - l) >= THRESHOLD) ~JuKV&&}K
mergeSort(data, temp, l, mid); S)A'Y]2X
else H<ZU#U0FZf
insertSort(data, l, mid - l + 1); Sg] J7;]
if ((r - mid) > THRESHOLD) R[1BfZ6s
mergeSort(data, temp, mid + 1, r); me\cLFw
else "%@uO)A /
insertSort(data, mid + 1, r - mid); plV7+?G
\;]kYO}
for (i = l; i <= mid; i++) { 15zrrU~D
temp = data; y_}SK6{
} o0pT6N)
for (j = 1; j <= r - mid; j++) { *o' 4,+=am
temp[r - j + 1] = data[j + mid]; ecX/K.8l
} !]S=z^"<
int a = temp[l]; -qebQv
int b = temp[r]; l SkEuN
for (i = l, j = r, k = l; k <= r; k++) { x7RdZC
if (a < b) { hxC!+ArVe
data[k] = temp[i++]; M0-,M/]l
a = temp; QMk+RM8U
} else { yu ,h\
data[k] = temp[j--]; ;t]|15]u
b = temp[j]; {$^SP7qV#>
} !Zbesp KZ
} >sj bK%
} ,vG<*|pn
:+,st&(E
/** nDlO5 pe"d
* @param data IbWPlbH
* @param l vN{-?
* @param i `ycU-m==
*/ }r2[!gGd%|
private void insertSort(int[] data, int start, int len) { Y5-kj,CB
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); sIm#_+Y
} I}v]Zm9
} HPa|uDVv
} m1.B\~S3
} .yVnw^gu
2W3W/> 2h
堆排序： dALK0U
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package org.rut.util.algorithm.support; b Dg9P^<n
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import org.rut.util.algorithm.SortUtil; el'j&I
98*x 'Wp
/** H_X?dj15
* @author treeroot F$*3@Y
* @since 2006-2-2 vSM_]fn
* @version 1.0 ygvzdYd
*/ !*P&Eat
public class HeapSort implements SortUtil.Sort{ 9NWloK6bT
WL\^F#:
/* (non-Javadoc) `Lz1{#F2G
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) lIuXo3
*/ %yaG,;>U
public void sort(int[] data) { DuF7HTN[K
MaxHeap h=new MaxHeap(); M^ 5e~y
h.init(data); /R%^rz'w
for(int i=0;i h.remove(); fr#Qz{
System.arraycopy(h.queue,1,data,0,data.length); yL"i
} #'>?:k
.v,bXU$@YG
private static class MaxHeap{ 6s,2NeVWa
>%c*Xe
void init(int[] data){ b|ZLX:
this.queue=new int[data.length+1]; G+yL;G/
for(int i=0;i queue[++size]=data; Zu=kT}aGg
fixUp(size); p^8JLC
} wZv-b*4
} n+quSF)
,#aS/+;[)
private int size=0; 6+8mV8{-8
Za!w#j%h
private int[] queue; 1D$::{h
d_iY&-gq/
public int get() { J v<$*TVS0
return queue[1]; Ofm5[q=
} >h[(w
sA\L7`2H
public void remove() { M@O2 WB1ws
SortUtil.swap(queue,1,size--); sPpS~wk*
fixDown(1); nx;$dxx_Ws
} 4p x_ZD#J
file://fixdown E!@/NE\-
private void fixDown(int k) { E|,30Z+
int j; k2OM="Ei}
while ((j = k << 1) <= size) { y#bK,}
if (j < size %26amp;%26amp; queue[j] j++; jvO3_Zt9
if (queue[k]>queue[j]) file://不用交换 hrT%XJl
break; QSmJ`Bm
SortUtil.swap(queue,j,k); ]-KV0H
k = j; @,YlmX}
} fN0bIE Y
} BVAr&cu
private void fixUp(int k) { %uEtQh[
while (k > 1) { va>"#;37
int j = k >> 1; Bj&_IDs4
if (queue[j]>queue[k]) "!a`ygqpT
break; +@>:%yX
SortUtil.swap(queue,j,k); &9@gm--b:
k = j; iIB9j8
} #7\b\~5
} ;[caiMA-
8{@`kyy|
} IM$0#2\
j=Q$K#sBt
} od(:Y(4
aG Ef#A
SortUtil： 3d@ef|
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package org.rut.util.algorithm; NGj"ByVjx
[Gf{f\O
import org.rut.util.algorithm.support.BubbleSort; fwH`}<o
import org.rut.util.algorithm.support.HeapSort; ?k::tNv0
import org.rut.util.algorithm.support.ImprovedMergeSort; e2Ww0IK!E
import org.rut.util.algorithm.support.ImprovedQuickSort; (s Jq;Z
import org.rut.util.algorithm.support.InsertSort; k)i"tpw
import org.rut.util.algorithm.support.MergeSort; hU)'OKe
import org.rut.util.algorithm.support.QuickSort; 7g-$oO
import org.rut.util.algorithm.support.SelectionSort; C{)HlOW
import org.rut.util.algorithm.support.ShellSort; FbBX}n
|f3U%2@
/** [%t3[p<)O
* @author treeroot enPLaiJ'|q
* @since 2006-2-2 u&tFb]1@)
* @version 1.0 +:!ScG*
*/ ~xE=mg4le
public class SortUtil { N)P((>S;
public final static int INSERT = 1; a!?.F_T9A
public final static int BUBBLE = 2; K@*rVor{
public final static int SELECTION = 3; yFi6jN#~
public final static int SHELL = 4; n_u`B|^Pj
public final static int QUICK = 5; j,4,zA1j|
public final static int IMPROVED_QUICK = 6; `>\4"`I
public final static int MERGE = 7; }<.7xz|V
public final static int IMPROVED_MERGE = 8; lc"qqt
public final static int HEAP = 9; [='p!7z
aSTFcz"
public static void sort(int[] data) { Ny B&uf
sort(data, IMPROVED_QUICK); y]J3hKs
} hMz&JJ&B
private static String[] name={ o|+E+l9\
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" D-~G|8g
}; 6QW<RXom
@7)Z
private static Sort[] impl=new Sort[]{ l3BD <PB2S
new InsertSort(), a6k(9ZF
new BubbleSort(), j=FMYd8$y
new SelectionSort(), A"0wvk)UcY
new ShellSort(), `(!W s\:
new QuickSort(), O1|B3M[P
new ImprovedQuickSort(), G&.d)NfE
new MergeSort(), jT{f<P0
new ImprovedMergeSort(), Lr wINVa
new HeapSort() wInY7uBd!
}; Is<x31R
=?wMESU
public static String toString(int algorithm){ Gee~>:_Q{J
return name[algorithm-1]; lD9%xCo9(
} g)X7FxS,z
HgYc@P*b
public static void sort(int[] data, int algorithm) { @l)\?IEF@f
impl[algorithm-1].sort(data); (rAiDRQ[
} mMV2h|W
dFx2>6AZt
public static interface Sort { fV*}c`
public void sort(int[] data); ^=Q8]W_*
} AS`2=w
#NWZk.S
public static void swap(int[] data, int i, int j) { -QN1oK@\mE
int temp = data; BXNI(7xi
data = data[j]; FwXKRZa
data[j] = temp; T!Xm")d
} 1]_?$)$T
} <"hb#Tn