[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; mi`jY0e2
} `]T#uP<u
int i1=l; zyHHz\{
int i2=mid+1; fN|'aq*Pd
for(int cur=l;cur<=r;cur++){ Qp?+G~*
if(i1==mid+1) 9/yE\p.
data[cur]=temp[i2++]; KscugX*x
else if(i2>r) MS>QU@z7c
data[cur]=temp[i1++]; n7>L&?N#y#
else if(temp[i1] data[cur]=temp[i1++]; "t ^yM`$5[
else VGe OoS
data[cur]=temp[i2++]; $\9M6k'
} CogN1,GJ
} << XWL:
i 6DcLE
} _ Vo35kA
ru>c\X^|
改进后的归并排序: A.8[FkiNmD
8AGP*"gI
package org.rut.util.algorithm.support; 4?u<i=i
0t^Tm0RzH
import org.rut.util.algorithm.SortUtil; Y!1x,"O'H
rBLcj;,
/** 4.t72*ML
* @author treeroot Y3n6y+Uzk
* @since 2006-2-2 Y}n$s/O:u8
* @version 1.0 DwNEqHi
*/ S.! n35
public class ImprovedMergeSort implements SortUtil.Sort { # fe%E.
^U8^P]{R|
private static final int THRESHOLD = 10; Mhwuh`v%
z,f
/* wk@S+Q
* (non-Javadoc) ^+MG"|)u~
* lx H3a :gm
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) nf2[hx@=U
*/ U;qGUqI
public void sort(int[] data) { />13?o#
int[] temp=new int[data.length]; -~rZ| W~v
mergeSort(data,temp,0,data.length-1); VUQx"R9-
} "<Q,|Md
6");NHE
private void mergeSort(int[] data, int[] temp, int l, int r) { p*Q *}V
int i, j, k; OH_mZA
int mid = (l + r) / 2; p_:bt7 B
if (l == r) `JZ`j7f
return; 6|@\\\l
if ((mid - l) >= THRESHOLD) 1:j[p=Q&
mergeSort(data, temp, l, mid); U(~d^9/#
else nvOJY6)$V
insertSort(data, l, mid - l + 1); sVNM#,
if ((r - mid) > THRESHOLD) I$Ra*r
mergeSort(data, temp, mid + 1, r); SKdh!*G
else 5bHS|<
insertSort(data, mid + 1, r - mid); gY/p\kwsj
H3Zsm)+:
for (i = l; i <= mid; i++) { J};=)xLX;
temp = data; Fs 95^T
} d#>iFD+
for (j = 1; j <= r - mid; j++) { 6%\&m|S
temp[r - j + 1] = data[j + mid]; z<jH{AU
} lWRRB&8
int a = temp[l]; F4|U\,g
int b = temp[r]; U^~jB= =]
for (i = l, j = r, k = l; k <= r; k++) { N_Q\+x}zq
if (a < b) { ]N4?*S*jd)
data[k] = temp[i++]; JIh:IR(ta
a = temp; RbN# dI'
} else { 9J(jbJ7p
data[k] = temp[j--]; Pq<]`9/w^w
b = temp[j]; )ePQN~#K}
} lG/h[
} 6b7SA,
} KwxO%/-}S
AD0pmD
/** cd3;uB4\,
* @param data |<Rf^"T
* @param l ]dU/;8/%
* @param i uk<JV*R=
*/ _I<LB0kgf.
private void insertSort(int[] data, int start, int len) { Ef"M e(
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); /s|4aro
} +)U>mm,
} --BS/L-
} UtzM+7r@
} ;cfmMt!QWJ
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堆排序： s+7#TdhA
2r*Yd(e
package org.rut.util.algorithm.support; -+,3aK<[
Jd-u?
import org.rut.util.algorithm.SortUtil; \ QE?.Fx
:@c\a99Kx
/** *L+)R*|:&
* @author treeroot $PbwC6>8
* @since 2006-2-2 KOYcT'J@vR
* @version 1.0 Nt/#Qu2#br
*/ wu`P=-
public class HeapSort implements SortUtil.Sort{ 0$1-5XY9
WJs2d73Qp
/* (non-Javadoc) 72akOx
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ])D39
*/ 79G& 0 P\
public void sort(int[] data) { [~UCYYl
MaxHeap h=new MaxHeap(); M.h8Kr!.
h.init(data); HTw7l]]
for(int i=0;i h.remove(); kY.3x#w
System.arraycopy(h.queue,1,data,0,data.length); *c{X\!YBh
} #*)X+*
%D $+Z(
private static class MaxHeap{ %[J|n~8_Z
/AhN$)(O
void init(int[] data){ Api<q2@R
this.queue=new int[data.length+1]; /gUD!@
for(int i=0;i queue[++size]=data; T/Fj0'
fixUp(size); ;lU]ilYv
} ")i>-1_H
} I]vCra
(n {,R
private int size=0; hY[Vs5v
:W*']8 M-
private int[] queue; R0DWjN$j
_=ziw|zI
public int get() { w\(;>e@
return queue[1]; Xn3 \a81
} x!^u$5c
4pG!m&4]ze
public void remove() { ,3p$Z
SortUtil.swap(queue,1,size--); r]lPXj(`
fixDown(1); 9f7T.}HM
} <o:|0=Swb
file://fixdown pj/w9j G6
private void fixDown(int k) { i?D KKjN$
int j; CF0i72ul5
while ((j = k << 1) <= size) { jp|1S^b
if (j < size %26amp;%26amp; queue[j] j++; +u|p<z
if (queue[k]>queue[j]) file://不用交换 SZ3UR
break; vzPuk|q3
SortUtil.swap(queue,j,k); z(JDLd
k = j; p0Ra`*f
} 86HK4sES
} tShyG!b
private void fixUp(int k) { dp~] Wx
while (k > 1) { m%[`NP (
int j = k >> 1; XJ{b_h#N
if (queue[j]>queue[k]) '%\FT-{
break; p"ElO,\
SortUtil.swap(queue,j,k); ZCuLgCP?Z
k = j; e=#'rDm
} ;fl3'.S[
} 2uy<wJE>
ocDAg<wo
} vpL3XYs`
LktH*ePO
} 6 ~LCj"
8 bpYop7 L
SortUtil： 7f,!xh$
HLsG<#
package org.rut.util.algorithm; O;m@fS2%3
"GY/2;
import org.rut.util.algorithm.support.BubbleSort; j8|N;;MN
import org.rut.util.algorithm.support.HeapSort; {IR-g,B
import org.rut.util.algorithm.support.ImprovedMergeSort; E3P2
import org.rut.util.algorithm.support.ImprovedQuickSort; g+ P
import org.rut.util.algorithm.support.InsertSort; 8 O% ?t
import org.rut.util.algorithm.support.MergeSort; w4%yCp[,
import org.rut.util.algorithm.support.QuickSort; y)]L>o~
import org.rut.util.algorithm.support.SelectionSort; fOtzbYVC
import org.rut.util.algorithm.support.ShellSort; JK_(!
uE%$<o*#
/** t~(|2nTO5
* @author treeroot D/x!`&.sN
* @since 2006-2-2 O\&[|sGY{
* @version 1.0 "CcdwWM
*/ >Ndck2@
public class SortUtil { #cdrobJ
public final static int INSERT = 1; ~;uc@GGo
public final static int BUBBLE = 2; 2?./S)x)
public final static int SELECTION = 3; || 0n%"h>i
public final static int SHELL = 4; <yw(7
public final static int QUICK = 5; IqrT@jgN-
public final static int IMPROVED_QUICK = 6; z [9f
public final static int MERGE = 7; #BLmT-cl
public final static int IMPROVED_MERGE = 8; wM aqR"%
public final static int HEAP = 9; Htn''adg5
i?0+f}5<p
public static void sort(int[] data) { k/]4L!/ T
sort(data, IMPROVED_QUICK); ] lONi
} r>Rm=eKJ
private static String[] name={ 9f U,_`r
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" l Taw6;
}; <]e0TU?bk
3d81]!n
private static Sort[] impl=new Sort[]{ 6xq/
new InsertSort(), 4/:}K>S_
new BubbleSort(), vWpoaz/w
new SelectionSort(), e$=UA%
new ShellSort(), H)VzPe#{
new QuickSort(), NuQ l
new ImprovedQuickSort(), <)am]+Lswy
new MergeSort(), \!Cc[n(f#
new ImprovedMergeSort(), !eE;MaS>
new HeapSort() ?vn9HhTD
}; U?.cbB,
Oll,;{<O
public static String toString(int algorithm){ TP R$oO2
return name[algorithm-1]; f:hsE
} wR]jJbF
?CU6RC n
public static void sort(int[] data, int algorithm) { ?=#vp /
impl[algorithm-1].sort(data); o +KDK{MD
} pB0p?D)n
O~~WP*N
public static interface Sort { RF$2p4=[
public void sort(int[] data); sjIUW$
} .,+TpPkc
%!X9>i>
public static void swap(int[] data, int i, int j) { [3|&!:4g6
int temp = data; rO3.%B}
data = data[j]; -{O>'9'1A
data[j] = temp; JVxGS{Z
} lo< t5~GQ
} }fT5(+ Wo