[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; 1 pYsjo~
} th;]Vo
int i1=l; *xho
int i2=mid+1; 0MhxFoFO
for(int cur=l;cur<=r;cur++){ pe|\'<>i
if(i1==mid+1) akY6D]M
data[cur]=temp[i2++]; -hm9sNox
else if(i2>r) 6UtG-WHHt
data[cur]=temp[i1++]; l9,w>]s
else if(temp[i1] data[cur]=temp[i1++]; f(W,m >.;
else yl|R:/2V
data[cur]=temp[i2++]; PK9Qm'W b
} 0honHP
} r]Z.`}Kkm
T&e%/
} [kQ"6wh8
y& Gw.N}<r
改进后的归并排序: A` oa|k!U
/Ir 7 DZK
package org.rut.util.algorithm.support; 7YSuB9{M
@#J H=-06
import org.rut.util.algorithm.SortUtil; ~9]Vy (L
W>UjUq);
/** IrUpExJ
* @author treeroot 9 ?[4i'
* @since 2006-2-2 rUhWZta
* @version 1.0 )Ep@$Gv|S
*/ -1dIZy
public class ImprovedMergeSort implements SortUtil.Sort { yzODF>KJ
: ,|=Q}
private static final int THRESHOLD = 10; qrOB_Nz
([E#zrz%
/* 4_Tb)?L+:
* (non-Javadoc) !G@V<'F
* A89Y;_4y
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 4{uJ||!
*/ vjY);aQ
public void sort(int[] data) { }qTv&Z3$
int[] temp=new int[data.length]; 6!i( \Q*
mergeSort(data,temp,0,data.length-1); h/w]
} sT@u3^>
B/[hi%~
private void mergeSort(int[] data, int[] temp, int l, int r) { ^!XU+e+:0
int i, j, k; h:eN>yW
int mid = (l + r) / 2; w`2_6[,9
if (l == r) g5?r9e
return; ~r7DEy|+
if ((mid - l) >= THRESHOLD) kjQIagw
mergeSort(data, temp, l, mid); +<vqkc
else Z%(Df3~gmm
insertSort(data, l, mid - l + 1); k|)^!BdO
if ((r - mid) > THRESHOLD) [j]}$fFe
mergeSort(data, temp, mid + 1, r); ZC>`ca
else +;{rU&
insertSort(data, mid + 1, r - mid); q>wa#1X)
`XFX`1
for (i = l; i <= mid; i++) { Vw6>:l<+<
temp = data; j=zU7wz)D
} /i\uwa,
for (j = 1; j <= r - mid; j++) { 0$Qn#K
temp[r - j + 1] = data[j + mid]; xV }:M
} pb$ An<P
int a = temp[l]; lUy*549,
int b = temp[r]; IX > j8z[
for (i = l, j = r, k = l; k <= r; k++) { 96^1Ivd
if (a < b) { `*.r'k2R
data[k] = temp[i++]; w%!k?t,*]
a = temp; .je~qo)
} else { 5+#?7J1
data[k] = temp[j--]; J?UZN^
b = temp[j]; "1=.5:yG
} D~t"9Z\
} |>m# m*{S
} !ds"88:5^
1VPfa
/** :d:|7hlNQ
* @param data Y:#kel<
* @param l ~`W6O>
* @param i 2xz%'X%
*/ #Q!c42}M
private void insertSort(int[] data, int start, int len) { s0`]!7D<
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Q*oA{eZY
} g6k&c"%IQ(
} ]y$V/Ij=qK
} C>\h?<s
} GhchfI.
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堆排序： 8z3I~yL_`+
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package org.rut.util.algorithm.support; '/n%}=a=
RLeSA\di
import org.rut.util.algorithm.SortUtil; %<bG%V(
Q:Nwy(,I
/** 2!"\;/
* @author treeroot P*nT\B
* @since 2006-2-2 @pEO@bbg>
* @version 1.0 EzeDShN=J
*/ 0YTtA]|`4
public class HeapSort implements SortUtil.Sort{ -sGWSC
{R6Zwjs
/* (non-Javadoc) HnYFE@Nl:U
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ?Pok-90
*/ c=U$$|qHV
public void sort(int[] data) { _g/TH-;^
MaxHeap h=new MaxHeap(); (tz_D7c$F
h.init(data); }tS6Z:fOY
for(int i=0;i h.remove(); WPh |~]by<
System.arraycopy(h.queue,1,data,0,data.length); m}'t'l4 c
} UHsrZgIRYT
o )}<
private static class MaxHeap{ 3T.M?UG>
el*pYI
void init(int[] data){ W> -E.#!_
this.queue=new int[data.length+1]; 7.Kjg_N#Tr
for(int i=0;i queue[++size]=data; s5Bmv\e.i5
fixUp(size); 4jyr\=42F'
} wshp{ y
} qyG636i
+Hm+#o
private int size=0; cM7k){
1RUbY>K#U
private int[] queue; >stVsFdV)
6XxG1]84
public int get() { h1UlLy8
return queue[1]; KE)D =P
} 3I{ta/(
1\.zOq#
public void remove() { P.H/H04+
SortUtil.swap(queue,1,size--); TF iM[
fixDown(1); *~lgU4
} )DZ-vnZ#t0
file://fixdown ?3E_KGI
private void fixDown(int k) { ^J}$y7
int j; ~m;MM)_V
while ((j = k << 1) <= size) { nluyEK
if (j < size %26amp;%26amp; queue[j] j++; 4\eX=~C>:
if (queue[k]>queue[j]) file://不用交换 :pF]TY"K.
break; la"A$Tbu~
SortUtil.swap(queue,j,k); G*wW&R)
k = j; re 1k]
} $rQFM[
} QGCdeE$K
private void fixUp(int k) { r)@&2b"q
while (k > 1) { ("M#R!3
int j = k >> 1; CTrs\G
if (queue[j]>queue[k]) BQJ`vIa
break; D``NQ`>A
SortUtil.swap(queue,j,k); *e"GQd?
k = j; X!A]V:8dk
} _=^hnv
} m-KK {{
elHarey`f
} He_(JXTP
';CuJXAj
} [+cnx21{
E<G@LT
SortUtil： a]=vq(N'r
?`*-QG}
package org.rut.util.algorithm; s2v#evI`+
Z6/~2S@
import org.rut.util.algorithm.support.BubbleSort; X.4ZLwX=
import org.rut.util.algorithm.support.HeapSort; 8JOht(m
import org.rut.util.algorithm.support.ImprovedMergeSort; {s^ryv_}
import org.rut.util.algorithm.support.ImprovedQuickSort; ;F]|HD9
import org.rut.util.algorithm.support.InsertSort; OFL+Q~~C
import org.rut.util.algorithm.support.MergeSort; j6d"8oH _
import org.rut.util.algorithm.support.QuickSort; byj mH
import org.rut.util.algorithm.support.SelectionSort; V-U ^O45
import org.rut.util.algorithm.support.ShellSort; lXk-86[M
2WECQl=r
/** ]Q_G /e
* @author treeroot hv8[_p`>
* @since 2006-2-2 WQmiG=Dw^
* @version 1.0 <GmrKdM
*/ hz|z&vyP
public class SortUtil { [tf^i:2
public final static int INSERT = 1; GTIfrqT
public final static int BUBBLE = 2; iF_r'+j
public final static int SELECTION = 3; C05{,w?
public final static int SHELL = 4; cyP*QW[
public final static int QUICK = 5; qsRfG~Cg
public final static int IMPROVED_QUICK = 6; "91Atb;hJ
public final static int MERGE = 7; W]Y!ZfGnN
public final static int IMPROVED_MERGE = 8; @`+$d=rO`
public final static int HEAP = 9; gsq[ 9
f(MHU
public static void sort(int[] data) { ~U*N'>'=)
sort(data, IMPROVED_QUICK); VGUDUM.8
} 714nUA872
private static String[] name={ 3R[J,go
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" e%0#"6}
}; OZ0%;Y0
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private static Sort[] impl=new Sort[]{ 0]w[wc <
new InsertSort(), #YYvc`9
new BubbleSort(), Ri6 br
new SelectionSort(), <mgTWv
new ShellSort(), 1Kf t?g
new QuickSort(), _,1kcDu
new ImprovedQuickSort(), k<";t
new MergeSort(), LmdV@gR
new ImprovedMergeSort(), mb`}sTU).
new HeapSort() w8#>xV^~
}; \R6T"U
HPCA$LD
public static String toString(int algorithm){ ? /X6x1PN
return name[algorithm-1]; c(g^*8Pb
} @O0vh$3t0
Nv]/L+i
public static void sort(int[] data, int algorithm) { ]Tw6Fg1o>
impl[algorithm-1].sort(data); QNa3S*
} g UAPjR
qa`(,iN
public static interface Sort { A-!qO|E[-
public void sort(int[] data); R$m?&1K
} fTtSx_}3H
vjRD?kF
public static void swap(int[] data, int i, int j) { x(N}^Hu
int temp = data; X.Y)'qSf
data = data[j]; 8/$iCW
data[j] = temp; /Z_ [)PTH
} gm$MEeC
} I2!HXMrp