[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; $sR-J'EE!
} 4|DGQ
int i1=l; MbeO(Q
int i2=mid+1; b0"R |d[i
for(int cur=l;cur<=r;cur++){ ?*)wQZt;
if(i1==mid+1) 8gI~x.k`
data[cur]=temp[i2++]; \Dn an5H/
else if(i2>r) NHq*&xy
data[cur]=temp[i1++]; 5qx$=6PT
else if(temp[i1] data[cur]=temp[i1++]; [}!obbM
else m;"dLUb
data[cur]=temp[i2++]; f1UGDC<p9
} &nEQ`3~F
} by%k*y
qT+:oMrTSm
} \Z%V)ZRi=
%["V "{ z
改进后的归并排序: w0N8a%
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package org.rut.util.algorithm.support; [EU\-
X7gtR|[
import org.rut.util.algorithm.SortUtil; 4w-P%-4
9Wi+7_)
/** jFMf=u&U
* @author treeroot G Za<
* @since 2006-2-2 Y>: e4Q
* @version 1.0 p[M*<==4
*/ t=$Hv
public class ImprovedMergeSort implements SortUtil.Sort { ON/U0V:v
rq>OmMQ67
private static final int THRESHOLD = 10; |=9=a@l]P
^%r>f@h!L
/* FlQ(iv)P
* (non-Javadoc) }c~o3t(7`b
* b];? tP
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) "G3zl{?GP
*/ B'"RKs]
public void sort(int[] data) { S;FgS:;
int[] temp=new int[data.length]; `;fk,\8t%
mergeSort(data,temp,0,data.length-1); =/jCDY
} z4yV1
$"G=r(MW
private void mergeSort(int[] data, int[] temp, int l, int r) { ^|0>&sTHOH
int i, j, k; qkbxa?&X
int mid = (l + r) / 2; )0W-S9e<
if (l == r) urK[v
return; =-U8^e_Y
if ((mid - l) >= THRESHOLD) 2gnmk TyF
mergeSort(data, temp, l, mid); ZhpbbS
else Z#P:C":e
insertSort(data, l, mid - l + 1); -N]%)Hy
if ((r - mid) > THRESHOLD) l /\n7:
mergeSort(data, temp, mid + 1, r); nm597WeZp
else 8hx 3pvmk
insertSort(data, mid + 1, r - mid); Rg?m$$X`
~9KxvQzt
for (i = l; i <= mid; i++) { 1-M\K^F
temp = data; \P` mV9P
} aV'r oxM
for (j = 1; j <= r - mid; j++) { 2PSt*(
temp[r - j + 1] = data[j + mid]; [C"[#7
} j >wT-s
int a = temp[l]; `K^j:fE7n
int b = temp[r]; 8P#jC$<
for (i = l, j = r, k = l; k <= r; k++) { DNN60NX 5Q
if (a < b) { ?g21U97Q
data[k] = temp[i++]; Y$SwQ;wl
a = temp; Z-D4~?Tv
} else { _;1H2o2f
data[k] = temp[j--]; 0=^A{V!m
b = temp[j]; $J]b+Bp
} BCK0fk~
} T+y3Ph--^
} aA5rvP+
;%H/^b.c
/** @a{1vT9b
* @param data N$i|[>`j
* @param l `>mT/Rmb@
* @param i v3vQfcxR
*/ ^Q'^9M2)
private void insertSort(int[] data, int start, int len) { mSu1/?PS
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); *&VqAc%qD
} iEJY[P1
} (3>Z NTm
} f(o1J|U{
} v)a$;P%
},G>+ s8h
堆排序： qd7 86~
2}^fhMS
package org.rut.util.algorithm.support; yA/b7x-c
,,-g*[/3
import org.rut.util.algorithm.SortUtil; X-&U-S;
DfNX@gbo
/** LmKG6>Q1#1
* @author treeroot !h "6h
* @since 2006-2-2 rz@;Zn
* @version 1.0 pg%'_+$~m
*/ pg.z `k
public class HeapSort implements SortUtil.Sort{ 7fg +WZ
8 )w75+&
/* (non-Javadoc) DgQw9`WA
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) x3JX}yCX
*/ c9 UJ=
public void sort(int[] data) { &Jr~)o
MaxHeap h=new MaxHeap(); `2M`;$~ 5
h.init(data); +Xg]@IS-eg
for(int i=0;i h.remove(); h* to%N
System.arraycopy(h.queue,1,data,0,data.length); z&6TdwhV
} O#e'.n!rI
`]{/(pIgW;
private static class MaxHeap{ !\0UEC
nM)q;9-ni
void init(int[] data){ HktvUJ(Ii
this.queue=new int[data.length+1]; -|l^- Qf!
for(int i=0;i queue[++size]=data; Q[+o\{ O
fixUp(size); x-:a5Kz!
} `zjEs8`'
} Q9`}dYf.
8p?Fql}F[
private int size=0; BmRk|b
k8}*b&+{vz
private int[] queue; g)<t=+a
L%[om c?
public int get() { uH}cvshv
return queue[1]; o0nKgq'w|x
} :CQ-?mT^LA
_dT,%q
public void remove() { W+&w'~M
SortUtil.swap(queue,1,size--); ~ cKmf]
fixDown(1); eJ+uP,$
} }K!)Z}8
file://fixdown ng-g\&-
private void fixDown(int k) { z]NzLz9VfL
int j; `|1#Vuk
while ((j = k << 1) <= size) { nQ0g,'o
if (j < size %26amp;%26amp; queue[j] j++; eRK kHd-
if (queue[k]>queue[j]) file://不用交换 a|*{BlY
break; ov{
SortUtil.swap(queue,j,k); uIG,2u,
k = j; ZE())W"
} wgK:^DP
} 6w d0"
private void fixUp(int k) { h|_E>6d)
while (k > 1) { Sc!{ o!9\
int j = k >> 1; qjsS2,wM
if (queue[j]>queue[k]) [dK5kO
break; GgoPwl#{
SortUtil.swap(queue,j,k); Xgge_`T9
k = j; ] Fx9!S
} 1]L 0r
} C0xjM0
io[$QTY
} iUv#oX H
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} &TmN^R>
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SortUtil： e5!LbsJv
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package org.rut.util.algorithm; >Cb[
Vf67gux
import org.rut.util.algorithm.support.BubbleSort; 4,o|6H
import org.rut.util.algorithm.support.HeapSort; -.8 nEO3
import org.rut.util.algorithm.support.ImprovedMergeSort; mCa[?
import org.rut.util.algorithm.support.ImprovedQuickSort; U*.Wx0QM
import org.rut.util.algorithm.support.InsertSort; c:SA#.
import org.rut.util.algorithm.support.MergeSort; 6R%Ra
import org.rut.util.algorithm.support.QuickSort; RJ ,a}w[9
import org.rut.util.algorithm.support.SelectionSort; jt?937{
import org.rut.util.algorithm.support.ShellSort; pXfg{2
=K6aiP$Ft
/** [xF(t @p
* @author treeroot qRXb9c
* @since 2006-2-2 ]-Z="YPY
* @version 1.0 _;] 3w
*/ X~DI d
public class SortUtil { H\OV7=8
public final static int INSERT = 1; SH"e x,=
public final static int BUBBLE = 2; Iv6(Z>pAB
public final static int SELECTION = 3; os<B}D[
public final static int SHELL = 4; @z8,XW }
public final static int QUICK = 5; (x{6N^J.t
public final static int IMPROVED_QUICK = 6; RR u1/nam
public final static int MERGE = 7; 1LbJR'}
public final static int IMPROVED_MERGE = 8; T)"B35
public final static int HEAP = 9; }H[v!l@
T}ZUw;}BL
public static void sort(int[] data) { b~khb!]
sort(data, IMPROVED_QUICK); IXp(Aeb
} qVOlUH
private static String[] name={ _raj b1!
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" `K.2&6xc
}; 0B0Uay'd_
Xsvf@/]U
private static Sort[] impl=new Sort[]{ B'( /W@
new InsertSort(), O7p>"Bh
new BubbleSort(), p`@7hf|hm
new SelectionSort(), [b-wak})aD
new ShellSort(), >[]@Df,p
new QuickSort(), l$ABOtM@
new ImprovedQuickSort(), K5O8G
new MergeSort(), |Co ?uv i
new ImprovedMergeSort(), {5tb.{
new HeapSort() 7!0~sf9A
}; }<y-`WB
xXpeo_y'
public static String toString(int algorithm){ {&_1/
return name[algorithm-1]; ,/O,j SRk
} Byx8`Cx1
Gj6(ycaS
public static void sort(int[] data, int algorithm) { lkNaSz[
impl[algorithm-1].sort(data); 1wX0x.4d
} R;2tb7o
}%K)R5C
public static interface Sort { <!ewb=[_$
public void sort(int[] data); 3jMHe~.E<
} ')kn
o1x IGP<
public static void swap(int[] data, int i, int j) { Q/oel'O*x
int temp = data; ai7*</ls
data = data[j]; Ob:}@jj
data[j] = temp; N/ 7Q(^
} E1(2wJ-3"
} KkVFY+/)