[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; oRp;9
} khXp}p!Zm
int i1=l; =N,ahq
int i2=mid+1; aPELAU-
for(int cur=l;cur<=r;cur++){ ceKR?%8s
if(i1==mid+1) ~~8?|@V
data[cur]=temp[i2++]; p3e_:5k
else if(i2>r) XGs d"UW
data[cur]=temp[i1++]; ZxvqLu
else if(temp[i1] data[cur]=temp[i1++]; 4hymQ3 g
else Ym]Dlz,o
data[cur]=temp[i2++]; e*nT+Rp
} .u<i<S
} F9N/_H*+
Cp`>dtCd
} }]fJ[KbDp
7W7!X\0Y
改进后的归并排序: gwm}19JC
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package org.rut.util.algorithm.support; !623;
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import org.rut.util.algorithm.SortUtil; @i" ^b
t;>"V.F<1
/** 4E"OD+
* @author treeroot J|'e.1v
* @since 2006-2-2 r.JY88"
* @version 1.0 $y2"Q,n+
*/ G$P|F6
public class ImprovedMergeSort implements SortUtil.Sort { nVSuvq|S
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private static final int THRESHOLD = 10; ;z>?- j
Z`W@Od$f
/* v/1&V+"^kd
* (non-Javadoc) ^GS,4[)H
* Boi?Bt
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) %T_4n^beFQ
*/ @u4q\G\
public void sort(int[] data) { \!]Zq#*kH
int[] temp=new int[data.length]; 4R;6u[a]u
mergeSort(data,temp,0,data.length-1); |afzW=8'
} [~%\:of70n
yjq~O~
private void mergeSort(int[] data, int[] temp, int l, int r) { /d1 B-I
int i, j, k; 65@,FDg*i
int mid = (l + r) / 2; sF+mfoMtG
if (l == r) p!XB\%sv'"
return; 2O*(F>>dT
if ((mid - l) >= THRESHOLD) FHoY=fCI
mergeSort(data, temp, l, mid); b`TA2h
else Q\!0V@$
insertSort(data, l, mid - l + 1); ,hggmzA~
if ((r - mid) > THRESHOLD) N~Kl{">`
mergeSort(data, temp, mid + 1, r); SLj2/B0
else 8/tvS8I#y
insertSort(data, mid + 1, r - mid); _NkVi_UX
9=-d/y?
for (i = l; i <= mid; i++) { 2X= pu.;F
temp = data; K~U5jpc
} I_h8)W
for (j = 1; j <= r - mid; j++) { cTq}H_hC
temp[r - j + 1] = data[j + mid]; Zy<gA >
} XAnN<
int a = temp[l]; A.D@21py
int b = temp[r]; ^hMJNy&R
for (i = l, j = r, k = l; k <= r; k++) { X}-)io
if (a < b) { <8'-azpJ6<
data[k] = temp[i++]; u4W2{
a = temp; ++Z,U
} else { &~6W!w
data[k] = temp[j--]; [q<Vm-
b = temp[j]; Z2%ySO
} |z5`h
} &idPO{G
} j9bn|p$DA
,rC$~ &
/** BS6UXAf{|Z
* @param data IpRdGT02
* @param l ]P5|V4FXo
* @param i ]csfK${
*/ C5W} o:jE
private void insertSort(int[] data, int start, int len) { jMH=lQ+8
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); "< c,I=A
} UE-+P
} AWXBk+
} /c>@^
} =Eh~ wm
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堆排序： ;(Xig$k
hm&cRehU
package org.rut.util.algorithm.support; ]<zjD%Ez
[Ju5O[o
import org.rut.util.algorithm.SortUtil; o-m9}pV
LzS)WjEN
/** yLDv/r
* @author treeroot @u.%z# h"1
* @since 2006-2-2 7a0kat'\
* @version 1.0 $4&%<'l3I
*/ c(R=f+
public class HeapSort implements SortUtil.Sort{ y|e@zf
gaIN]9wLm
/* (non-Javadoc) ]{/1F:bcQ
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Y[8GoqE|
*/ :B(vk3;U!
public void sort(int[] data) { \'BA}v &/
MaxHeap h=new MaxHeap(); '0\v[f{K3G
h.init(data); ,f]GOH
for(int i=0;i h.remove(); Y >83G`*}b
System.arraycopy(h.queue,1,data,0,data.length); \MY`R
} Q.$|TbVfds
v'vYNh
private static class MaxHeap{ VY@6!9G
l?UFe$9(
void init(int[] data){ 5g-AB`6T
this.queue=new int[data.length+1]; A%zX LV=3O
for(int i=0;i queue[++size]=data; ^`MGlI}
fixUp(size); f\{ynC2m
} 3T|xUY)G4
} $YNWT\FE
Fr,qVYf
private int size=0; gZ^'hW-{
p;Lp-9H\33
private int[] queue; Hkv4^|
.wb[cCUQ
public int get() { bS!4vc1`2
return queue[1]; `L=d72:
} [@PD[-2QG3
>,&@j,?']
public void remove() { o-f;$]yp>
SortUtil.swap(queue,1,size--); ==?!z<I.d
fixDown(1); |BC/ERms
} ^qro0]"LD
file://fixdown L2j7w006
private void fixDown(int k) { >p[skN
int j; lO>9Q]S<
while ((j = k << 1) <= size) { -fA1_ ?7S
if (j < size %26amp;%26amp; queue[j] j++; DMcH, _(
if (queue[k]>queue[j]) file://不用交换 k-zkb2
break; p /x]
SortUtil.swap(queue,j,k); WkF60'Hf
k = j; [`]h23vRW
} 7SyysH<H
} +4r.G(n),
private void fixUp(int k) { bh~"LQS1
while (k > 1) { /|HVp
int j = k >> 1; t 5{Y'
if (queue[j]>queue[k]) a#k=! W
break; gI/#7Cr
SortUtil.swap(queue,j,k); _?YP0GpU
k = j; #3h~Z)+y
} *wd@YMOP
} xaSg'8-
.Z0$KQ'iy
} a*g7uaoP
T0Kjnzs
} naHQeX;
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SortUtil： _>LI[yf{
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package org.rut.util.algorithm; |RA|nu
&-hz&/A,
import org.rut.util.algorithm.support.BubbleSort; ;GjZvo
import org.rut.util.algorithm.support.HeapSort; 6~rO(
import org.rut.util.algorithm.support.ImprovedMergeSort; uYu/0fQD
import org.rut.util.algorithm.support.ImprovedQuickSort; %!vgAH4
import org.rut.util.algorithm.support.InsertSort; Cr a@
import org.rut.util.algorithm.support.MergeSort; \d&/,?,Ey
import org.rut.util.algorithm.support.QuickSort; .GM}3(1fX`
import org.rut.util.algorithm.support.SelectionSort; _x&fK$Y)B
import org.rut.util.algorithm.support.ShellSort; :1Y*&s
nz}}m^-j
/** bFv,.(h'
* @author treeroot ^hN.FIzM
* @since 2006-2-2 J,&B
* @version 1.0 )}[:.Zg,3/
*/ ET1>&l:.
public class SortUtil { ui[E,W~
public final static int INSERT = 1; ' thEZ
public final static int BUBBLE = 2; "8%z,lHw
public final static int SELECTION = 3; @8;0p
public final static int SHELL = 4; Ug1[pONk
public final static int QUICK = 5; e+? -#
public final static int IMPROVED_QUICK = 6; ,Q2?Z:l
public final static int MERGE = 7; OZ9ud ]@\
public final static int IMPROVED_MERGE = 8; (0cL! N;;
public final static int HEAP = 9; bY>JLRQJ-
c@ea ;Cv
public static void sort(int[] data) { pp!>:%
sort(data, IMPROVED_QUICK); 1/l;4~p7'
} {Iu9%uR>@
private static String[] name={ jb5nL`(j$
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" KVC$o+<'`%
}; |rhCQ"H
)=:gO`"D
private static Sort[] impl=new Sort[]{ 8!!iwmH{
new InsertSort(), _Cd_i[K[
new BubbleSort(), Tam\,j
new SelectionSort(), ,]\:]Y&?
new ShellSort(), Vjc*D]
new QuickSort(), ^-|yF2>`
new ImprovedQuickSort(), eKT'd#o2R
new MergeSort(), -j<g}IG
new ImprovedMergeSort(), }p <p(
new HeapSort() `H7V['
}; 4NN81~v 4
\kQ@G
public static String toString(int algorithm){ )HFl 0[vT
return name[algorithm-1]; TfFuHzZZ
} _Q $D6+
49;2tl;F
public static void sort(int[] data, int algorithm) { Y unY'xY
impl[algorithm-1].sort(data); ?#cX_
} Bv)4YU
, id`=L=
public static interface Sort { \!_:<"nX.
public void sort(int[] data); Hh<3k- *d
} >d{O1by=d9
}_A#O|dxO
public static void swap(int[] data, int i, int j) { u>cU*E4/
int temp = data; ^9ZW}AAO
data = data[j]; 3o>.Z;
data[j] = temp; |iJ+e -_R
} ?Ww\D8yV&
} qU/,&C