[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; Ae[Na:G+
} g+1&liV
int i1=l; ~>-MVp
int i2=mid+1; *JT,]7>
for(int cur=l;cur<=r;cur++){ Y5,[udF:O
if(i1==mid+1) ":!7R<t
data[cur]=temp[i2++]; NcMohpkq
else if(i2>r) ^T&@(|o
data[cur]=temp[i1++]; AAW])c`.
else if(temp[i1] data[cur]=temp[i1++]; [QZ g=."
else PqDffZ^z
data[cur]=temp[i2++]; \{u 9Kc
} =R6IW,*
} B/F6WQdZ
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} 56`Tna,t
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改进后的归并排序: Vz @2_k
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package org.rut.util.algorithm.support; n> tru L
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import org.rut.util.algorithm.SortUtil; ~OSgpM#O!T
1=U NA :t<
/** 68 \73L=
* @author treeroot hI>vz"J
* @since 2006-2-2 d.3cd40Q
* @version 1.0 @]F1J
*/ l.nd Wv
public class ImprovedMergeSort implements SortUtil.Sort { o7i>D6^^
5x?YFq6k
private static final int THRESHOLD = 10; xmXuBp:M(R
w_ONy9
/* bo|3sN+D
* (non-Javadoc) xm$-:N0q
* 9Rd&Jq^
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) UI%Z`.&
*/ a2%xW_e
public void sort(int[] data) { M)6iYA%$
int[] temp=new int[data.length]; B9(@.
mergeSort(data,temp,0,data.length-1); D`NPU
} A29R5
zN3b`K. i
private void mergeSort(int[] data, int[] temp, int l, int r) { L'L[Vpx
int i, j, k; !YVGT <
int mid = (l + r) / 2; !fmbm4!a
if (l == r) j/p1/sJ[y
return; ,[UK32KWI
if ((mid - l) >= THRESHOLD) xNOArb5e5
mergeSort(data, temp, l, mid); a${<~M hm
else ^gSZzJ5
insertSort(data, l, mid - l + 1); $+
if ((r - mid) > THRESHOLD) i9koh3R\
mergeSort(data, temp, mid + 1, r); 'B\7P*L"p
else fHd|tl
insertSort(data, mid + 1, r - mid); vN9R.R
cMK}BHOC
for (i = l; i <= mid; i++) { U-U"RC>
temp = data; /P%OXn$i/
} 5_7y1
for (j = 1; j <= r - mid; j++) { Aw$+Ew[8 2
temp[r - j + 1] = data[j + mid]; ~J:]cy)Q
} cw"Ou%
int a = temp[l]; B? Z_~Bf&
int b = temp[r]; 9T#${NK
for (i = l, j = r, k = l; k <= r; k++) { %EH{p@nM&-
if (a < b) { ~YRG9TK
data[k] = temp[i++]; oH='\M%+
a = temp; zQ~ax!}R
} else { Ms 3Sri
data[k] = temp[j--]; u*=8s5Q[
b = temp[j]; <BiSx
} V|&->9"
} Ji)Ys ebV
} c> 0R_
363KU@`
/** aY-7K._</
* @param data )_olJCdaP^
* @param l p|+TgOYOc
* @param i $W]}m"l
*/ ")YD~ZA%)
private void insertSort(int[] data, int start, int len) { ey@ccc*sZ9
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ]{| wU.
} |/;;uK,y
} p1N3AhXY
} bRD-[)
} )uu(I5St
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堆排序： Nsn~mY%
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package org.rut.util.algorithm.support; H~ E<ek'~
%<0'xJ%%Q
import org.rut.util.algorithm.SortUtil; [\3W_jR
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/** FBxg^g%PB@
* @author treeroot t0_4jVt
* @since 2006-2-2 $p|Im,
* @version 1.0 ^Na3VP
*/ M}e}3w
public class HeapSort implements SortUtil.Sort{ '*B%&QC-
ON9L+"vqv0
/* (non-Javadoc) o~7D=d?R
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Tq?7-_MLC$
*/ 5=#2@qp
public void sort(int[] data) { $5:I~-mx
MaxHeap h=new MaxHeap(); FsLd&$?T&
h.init(data); GL%)s?
for(int i=0;i h.remove(); h S)lQl:^
System.arraycopy(h.queue,1,data,0,data.length); 2]]}Xvx4#
} U"RA*|
-AN5LE9-
private static class MaxHeap{ GkpYf~\Q
n^|SN9_r
void init(int[] data){ l >~Rzw
this.queue=new int[data.length+1]; ^8KxU
for(int i=0;i queue[++size]=data; SQ&}18Z~
fixUp(size); iURSYR
} mUy>w
} d uP0US
NvC @
private int size=0; $zM \Jd
=~k}XB
private int[] queue; ~b@"ir+g4
pgQ^w0BQV
public int get() { A4g,)
return queue[1]; .W\JvPTC
} Y-lwS-Ii
OLo?=1&;;
public void remove() { n&,X']z.
SortUtil.swap(queue,1,size--); aJ@lT&.
fixDown(1); jx{ fel
} rJh$>V+ '
file://fixdown d_!}9
private void fixDown(int k) { CaV@<T
int j; +p[O|[z
while ((j = k << 1) <= size) { 5=\^DeM@ H
if (j < size %26amp;%26amp; queue[j] j++; <0;G4fE7[H
if (queue[k]>queue[j]) file://不用交换 _0BQnzC=
break; 4V c``Um
SortUtil.swap(queue,j,k); O`$\Plt|v
k = j; j\"d/{7Q
} Lr9E02
} k<x7\T
private void fixUp(int k) { 1BgHkDW
while (k > 1) { H_,4N_hL
int j = k >> 1; B2Rpd &[
if (queue[j]>queue[k]) fw VI%0C@
break; "!_vQ^y
SortUtil.swap(queue,j,k); R;pIi/yDRe
k = j; BNe>Lko
} ~^'WHuzPy
} U{qwhz(
^q`RaX)
} /;vHAtt;f
-BSO$'{7
} b6xz\zCL
X,c`,B03
SortUtil： "_2;+@+
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package org.rut.util.algorithm; (>,b5g
(&u'S+
import org.rut.util.algorithm.support.BubbleSort; C\Z5%2<Z
import org.rut.util.algorithm.support.HeapSort; [aG
import org.rut.util.algorithm.support.ImprovedMergeSort; 4T$DQK@e
import org.rut.util.algorithm.support.ImprovedQuickSort; 2a;[2':
import org.rut.util.algorithm.support.InsertSort; 'v@*xF/L6a
import org.rut.util.algorithm.support.MergeSort; O\gVB!x
import org.rut.util.algorithm.support.QuickSort; 6Eus_aP
import org.rut.util.algorithm.support.SelectionSort; jcjl q-x
import org.rut.util.algorithm.support.ShellSort; 7{l~\]6d
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/** r i)`e
* @author treeroot @iMF&\KC
* @since 2006-2-2 # 2FrP5rC
* @version 1.0 0fLd7*1>
*/ -knP5"TB
public class SortUtil { =Ot_P7'5gv
public final static int INSERT = 1; K"hnGYt?
public final static int BUBBLE = 2; 4'tY1d
public final static int SELECTION = 3; ]omBq<ox'Y
public final static int SHELL = 4; 'vYt_T
public final static int QUICK = 5; !]5V{3
public final static int IMPROVED_QUICK = 6; 17`-eDd
public final static int MERGE = 7; M`8c|*G
public final static int IMPROVED_MERGE = 8; hd,O/-m#
public final static int HEAP = 9; 4CtWEq
u?rX:KkS
public static void sort(int[] data) { fdHFSnQ g
sort(data, IMPROVED_QUICK); ~]`U)Aw
} d(:I~m
private static String[] name={ m>3\1`ZF~<
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" o?cNH
}; vR>GE?s6
eKLE^`2*@
private static Sort[] impl=new Sort[]{ l_8ibLyo
new InsertSort(), F@#p
new BubbleSort(), .XVL JJ#
new SelectionSort(), 4#.Q|vyl]"
new ShellSort(), mg>wv[ 7
new QuickSort(), P!IXcPKW53
new ImprovedQuickSort(), 2aX{r/Lc
new MergeSort(), )=bW\=[8
new ImprovedMergeSort(), (^B=>
new HeapSort() ?>I
}; V6h8+|hK
ks %arm&
public static String toString(int algorithm){ :t;i2Ck
return name[algorithm-1]; -3y
} V#+F*w?&D
VS!v7-_N5
public static void sort(int[] data, int algorithm) { I~Qi):&x
impl[algorithm-1].sort(data); c4r9k-w0E
} 1~},}S]id
OF)*kiJ
public static interface Sort { [Q\(kd*4
public void sort(int[] data); 3xmPY.
} `I4E': ZG
P2 qC[1hYH
public static void swap(int[] data, int i, int j) { *cCj*Zr]
int temp = data; kY6_n4
data = data[j]; 'cAS>s"$}V
data[j] = temp; ;j[:tt\k
} 5R%y3::$S
} +EqL|