[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; 9R E;50h
} WAQv4&xGM
int i1=l; O35f5Kz
int i2=mid+1; :3G9YjzC}
for(int cur=l;cur<=r;cur++){ 0(..]\p^d
if(i1==mid+1) J5\> 8I,a
data[cur]=temp[i2++]; GC{Ys|s
else if(i2>r) <Q8bn?Z
data[cur]=temp[i1++]; _}\&;
else if(temp[i1] data[cur]=temp[i1++]; bhgh ]{
else 8(+X0}
data[cur]=temp[i2++]; Psv-y
} \k* ]w_m-
} Pgo5&SQb
PJ_|=bn
} Vs"M Cqi
a:8@:d1T K
改进后的归并排序: 6suc0
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package org.rut.util.algorithm.support; ~7=,)Q
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import org.rut.util.algorithm.SortUtil; o]FQ)WRB
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/** ]A\n>Z!;
* @author treeroot K;Xn!:) V:
* @since 2006-2-2 %?g]{
* @version 1.0 I?:V EN:
*/ |;].~7^
public class ImprovedMergeSort implements SortUtil.Sort { k{;:KW|
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private static final int THRESHOLD = 10; zZy>XHR H
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/* *[jaI-~S
* (non-Javadoc) i0R=P[
* ' ZB%McS
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) f]hW>-B(q
*/ <9Chkb|B
public void sort(int[] data) { Ne4A
int[] temp=new int[data.length]; qzG'Gz{{qu
mergeSort(data,temp,0,data.length-1); RXP"v-
} \K4m~e@!
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private void mergeSort(int[] data, int[] temp, int l, int r) { Xu T|vh
int i, j, k; a( qw
int mid = (l + r) / 2; 3)7'dM
if (l == r) 1n,JynJ
return; kfHLjr.
if ((mid - l) >= THRESHOLD) VP"L_Um
mergeSort(data, temp, l, mid); 7j]@3D9[:p
else {k)MC)%
insertSort(data, l, mid - l + 1); U9If%0P
if ((r - mid) > THRESHOLD) @GEvI2Vf.0
mergeSort(data, temp, mid + 1, r); yWs/~5[F
else }`eeItI+
insertSort(data, mid + 1, r - mid); 9*x9sfCv9
&Y,Rm78
for (i = l; i <= mid; i++) { Z# :Ww
temp = data; @!Pq"/
} )Y:CV,`
for (j = 1; j <= r - mid; j++) { z6Hl+nq B
temp[r - j + 1] = data[j + mid]; #a0 (Wh7
} /RMep8&
int a = temp[l]; .FC1:y<aO
int b = temp[r]; abF_i#
for (i = l, j = r, k = l; k <= r; k++) { 2{qoWys8[
if (a < b) { aJfW75C
data[k] = temp[i++]; ru U|
a = temp; #8(@a Y
} else { 1]qhQd-u
data[k] = temp[j--]; C{,nDa?|
b = temp[j]; =EG[_i{r
} CR_A{(
} d2(n3Xf
} xo*a9H?@
*L!R4;ubE
/** J0x)m2
* @param data Lh0<A%
* @param l 5=$D~>-#
* @param i nqV7Db~
*/ [`:\(( 8
private void insertSort(int[] data, int start, int len) { <vAg\Tv:S
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); xOt|j4
} Q[k}_1sWs$
} g6~uf4;
} h;Bol
} c~Ha68
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堆排序： Vw,dHIe(3
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package org.rut.util.algorithm.support; *AJW8tIP
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import org.rut.util.algorithm.SortUtil; >yaz
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/** zi5;>Iv0}
* @author treeroot TN0dfba[
* @since 2006-2-2 avT>0b:
* @version 1.0 *v&g>Ni
*/ Z)ObFJMG5
public class HeapSort implements SortUtil.Sort{ y)=Xo7j
D,R/abYZH
/* (non-Javadoc) [3\}Ca1
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ul:jn]S*
*/ NQOdgp
public void sort(int[] data) { ed617J
MaxHeap h=new MaxHeap(); ]v+\v re
h.init(data); 9iv!+(ni
for(int i=0;i h.remove(); :${Lm&J
System.arraycopy(h.queue,1,data,0,data.length); :0]KIybt
} vm Hf$rq
sqkPC_;A
private static class MaxHeap{ _|#)tWy}
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void init(int[] data){ Z*oGVr g
this.queue=new int[data.length+1]; [WB8X,
for(int i=0;i queue[++size]=data; \Q &Kd|
fixUp(size); Q2+e`
} ,H|V\\
} Iz ,C!c
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private int size=0; p{88v3b6
}3QEclZr
private int[] queue; y0z}[hZ
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public int get() { 'Yj/M
return queue[1]; jirxzj
} `M|fwlAJQ
C`DTPoXN
public void remove() { `"
SortUtil.swap(queue,1,size--); 9]|cs
fixDown(1); `i<U;?=0'
} tQ*5[F,fm
file://fixdown QupCr/Hs
private void fixDown(int k) { V a<L[8
int j; `~gyq>Ik2
while ((j = k << 1) <= size) { -`A6K!W&~p
if (j < size %26amp;%26amp; queue[j] j++; &L;0%
if (queue[k]>queue[j]) file://不用交换 vQ 5 p
break; sqsBGFeG
SortUtil.swap(queue,j,k); 2o6%P}C
k = j; _57i[U r
} }2G'3msx
} %kyvtt
private void fixUp(int k) { uN'e~X6
while (k > 1) { Ut0oh
int j = k >> 1; V+DN<F-
if (queue[j]>queue[k]) $My%7S/3
break; X62GEqff
SortUtil.swap(queue,j,k); g }5lGz4
k = j; h19c*,0z!
} Sl{]Z,
} 0<fN<iR`
meE&, {
} 3!#d&
kJ{X5&,_
} \y{C>!WX4
va| 1N/&
SortUtil： LG@5Z-
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package org.rut.util.algorithm; >.0B%
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import org.rut.util.algorithm.support.BubbleSort; }c$Zlb
import org.rut.util.algorithm.support.HeapSort; XZ}]H_, n
import org.rut.util.algorithm.support.ImprovedMergeSort; &h')snp:#
import org.rut.util.algorithm.support.ImprovedQuickSort; >q"mI6F
import org.rut.util.algorithm.support.InsertSort; RlC|xj"l%
import org.rut.util.algorithm.support.MergeSort; O*X]oX
import org.rut.util.algorithm.support.QuickSort; A-qdTJP
import org.rut.util.algorithm.support.SelectionSort; pm@Mlwg`1
import org.rut.util.algorithm.support.ShellSort; 3N[t2Y1r
HW)> `
/** pFx7URZA
* @author treeroot [a`89'"z
* @since 2006-2-2 >6KuZ_
* @version 1.0 7"FsW3an
*/ x}{/) ?vC
public class SortUtil { X=8y$Yy
public final static int INSERT = 1; n~@;[=o?5
public final static int BUBBLE = 2; 5PqL#Eu`!
public final static int SELECTION = 3; VMZ\9IwI
public final static int SHELL = 4; I& DEF*
public final static int QUICK = 5; "sdzm%
public final static int IMPROVED_QUICK = 6; !Qy%sY
public final static int MERGE = 7; nd}[X[ay
public final static int IMPROVED_MERGE = 8; w9G (^jS6
public final static int HEAP = 9; =# <!s!
JgEPzHgx
public static void sort(int[] data) { TY"8.vd
sort(data, IMPROVED_QUICK); K)QMxn
} jZx.MBVy]
private static String[] name={ ")}^\Om
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Uf4A9$R.G
}; >^=upf/
*2P%731n5
private static Sort[] impl=new Sort[]{ \oA>%+]5
new InsertSort(), 3rBSwgRl
new BubbleSort(), !:]CKbG
new SelectionSort(), Cjc>0)f&.
new ShellSort(), +`}QIp0
new QuickSort(), ibAZ=RD
new ImprovedQuickSort(), Arc6d5Q
new MergeSort(), aA7}>
new ImprovedMergeSort(), 3"FvYv{
new HeapSort() }>]V_}h
}; &{-r 5d23
m<}>'DT
public static String toString(int algorithm){ r~nD%H:}P
return name[algorithm-1]; `tw[{Wb
} i&=I5$
<Nwqt[.
public static void sort(int[] data, int algorithm) { > mk>VM
impl[algorithm-1].sort(data); (E[c-1s
} :#7"SEud}
6?i]oy^X]p
public static interface Sort { e ?sMOBPlv
public void sort(int[] data); nvY%{Zf$}
} MVP|l_2!
_Wg?H:\
public static void swap(int[] data, int i, int j) { v#c'p^T
int temp = data; Td(eNe_4T
data = data[j]; &6wD
data[j] = temp; =p{55dR
} 79`OB##
} 1 etl:gcEC