[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; QUi=ZD1
} jHM}({)-
int i1=l; 1w|u ^[~u\
int i2=mid+1; z{G@t0q
for(int cur=l;cur<=r;cur++){ i&zJwUr(<
if(i1==mid+1) ufXU
data[cur]=temp[i2++]; ^ZG 3{>
else if(i2>r) (d}z>?L
data[cur]=temp[i1++]; Q) Y&h'.(
else if(temp[i1] data[cur]=temp[i1++]; <j^"=UN4#
else @EGUQ|WL^
data[cur]=temp[i2++]; LO;Z3Q>#0
} RLUH[[
} T`r\yl}
<UBB&}R0
} Q=.j>aM+_
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改进后的归并排序: %( o[Hsl
E@S5|CM
package org.rut.util.algorithm.support; #)28ESj
0?\d%J!"S
import org.rut.util.algorithm.SortUtil; 82~ZPZG
OojQG
/** D(^ |'1
* @author treeroot ~e R6[;
* @since 2006-2-2 `yWWX.`
* @version 1.0 ^*+-0b;[G
*/ f*GdHUZ*
public class ImprovedMergeSort implements SortUtil.Sort { S0-/9h
h&6t.2<e
private static final int THRESHOLD = 10; ${w\^6&
q)KLf\
/* jthGNVZ
* (non-Javadoc) 5ofsJ!b'
* q NE(@at
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) .5YIf~!59
*/ x2 m A
public void sort(int[] data) { '3V?M;3|K
int[] temp=new int[data.length]; bhc .UmH
mergeSort(data,temp,0,data.length-1); ,L,?xvWG
} {;Ispx0m
h?2:'Vu]
private void mergeSort(int[] data, int[] temp, int l, int r) { OA\ *)c+F
int i, j, k; 09C[B+>h
int mid = (l + r) / 2; 8A3!XA
if (l == r) ]Qb85;0)
return; Q]2v]PJ6"
if ((mid - l) >= THRESHOLD) _9Y7.5
mergeSort(data, temp, l, mid); B;mt11M
else @(Y+W2Iyy+
insertSort(data, l, mid - l + 1); tx01*2]pX
if ((r - mid) > THRESHOLD) RB `<Zw
mergeSort(data, temp, mid + 1, r); Y]!{ nW
else C`>|D [
insertSort(data, mid + 1, r - mid); UkV{4*E
)4/227b/(
for (i = l; i <= mid; i++) { @Zd/>'
temp = data; ZsikI@?
} iv]*HE
for (j = 1; j <= r - mid; j++) { 4Js9"<w
temp[r - j + 1] = data[j + mid]; [MVG\6Up(
} #.z`clK#
int a = temp[l]; h>[][c(b
int b = temp[r]; -jOCzp
for (i = l, j = r, k = l; k <= r; k++) { >"q~9b A
if (a < b) { :D!}jN/)
data[k] = temp[i++]; 7L\kna<
a = temp; v3{[rK}
} else { h(VF
data[k] = temp[j--]; p 6FPdt)
b = temp[j]; K,\Bj/V(
} TWFi.w4pY
} ^@0-E@ {c
} +r 2\v
Sxw%6Va]p
/** hWqI*xSaJ
* @param data 1Ev#[FOc
* @param l t/9,JG
* @param i (`pd>
*/ -8r9DS-/W
private void insertSort(int[] data, int start, int len) { C/L+:b&x~
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ]C me)&hX
} U~e^
} !\%0O`b^4
} 8=h$6=1S
} :Sj r
0aS&!"o!
堆排序： C3 m#v[+
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package org.rut.util.algorithm.support; !@<>S>uGG
>nL9%W}8M
import org.rut.util.algorithm.SortUtil; `*nK@:
eVYUJ,
/** e~,/Z\i
* @author treeroot 6s"Erq5q
* @since 2006-2-2 D9|?1+Kc
* @version 1.0 uBe1{Z
*/ xe3t_y
public class HeapSort implements SortUtil.Sort{ "T_OLegdK
"/-T{p;.
/* (non-Javadoc) TdAHw @(
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) -UM5&R+o
*/ !Y3 *\
public void sort(int[] data) { K{)YnY_E;
MaxHeap h=new MaxHeap(); E"P5rT
h.init(data); xgeKz^,
for(int i=0;i h.remove(); 75pz' Cb
System.arraycopy(h.queue,1,data,0,data.length); H8}}R~ZO
} )@]Y1r4U
EFgs}BV_9
private static class MaxHeap{ ;uC +5g`
+'NiuN
void init(int[] data){ ;i2N`t2
this.queue=new int[data.length+1]; kM`!'0kt
for(int i=0;i queue[++size]=data; !y>MchNv
fixUp(size); \5wC&|WEB
} :%?\Wj5HW
} zmxrz[
!1H\*VM"
private int size=0; <A,G:&d~
: Jh
private int[] queue; W_zAAIY_Y
_/)?GXwLn
public int get() { (!nhU
return queue[1]; XVfp* `
} ?V}AwLX}
^'|\8
public void remove() { :W/,V^x}
SortUtil.swap(queue,1,size--); Wkk=x&
fixDown(1); hkO)q|1
} +C{ %pF
file://fixdown [akyCb
private void fixDown(int k) { Us]Uy|j
int j; cXO_g!&2A
while ((j = k << 1) <= size) { cN>z`xl
if (j < size %26amp;%26amp; queue[j] j++; ZZa$/q"
if (queue[k]>queue[j]) file://不用交换 z.9 #AN=&[
break; AID}NQQj_
SortUtil.swap(queue,j,k); "KY9MBzPD
k = j; ?`hk0qX3
} ~?pF'3q
} 3f{%IU(z
private void fixUp(int k) { J!QzF)$4J
while (k > 1) { 7]q$sQ
int j = k >> 1; FshQ OFW
if (queue[j]>queue[k]) z90=,wd
break; Q-[^!RAK?
SortUtil.swap(queue,j,k); ~lR"3z_Z}
k = j; VvwQz#S
} "/).:9],}
} 9^m& [Z
x0])&':!
} 8u::f`vi
MR90}wXE
} 4=H/-v'&
[`^x;*C
SortUtil： iaR^]|7_
`j59MSuK
package org.rut.util.algorithm; =sP6
g5)f8k0+ t
import org.rut.util.algorithm.support.BubbleSort; Aa5IccR
import org.rut.util.algorithm.support.HeapSort; Kt%`]Wp
import org.rut.util.algorithm.support.ImprovedMergeSort; 2'"$Y'
import org.rut.util.algorithm.support.ImprovedQuickSort; 4"e7 43(
import org.rut.util.algorithm.support.InsertSort; lA39$oJ
import org.rut.util.algorithm.support.MergeSort; 3ySP*J5
import org.rut.util.algorithm.support.QuickSort; ;6o p|
import org.rut.util.algorithm.support.SelectionSort; 877>=Tp|
import org.rut.util.algorithm.support.ShellSort; <R:KR(bT
T8.@}a
/** Ms*;?qtrR
* @author treeroot 46'EZ@#s
* @since 2006-2-2 7 :s6W%W1*
* @version 1.0 DTdL|x.{
*/ _Y*: l7
public class SortUtil { V%pdXM5
public final static int INSERT = 1; )gNHD?4x
public final static int BUBBLE = 2; V#W(c_g
public final static int SELECTION = 3; TA=Ij,z~
public final static int SHELL = 4; S:] w@$
public final static int QUICK = 5; nMcd(&`N
public final static int IMPROVED_QUICK = 6; bw{%X
public final static int MERGE = 7; >RxZ-.,a
public final static int IMPROVED_MERGE = 8; T7YzO,b/
public final static int HEAP = 9; VGBL<X
SZ-%0z
public static void sort(int[] data) { 6^zuRY;
sort(data, IMPROVED_QUICK); R|{6JsjG10
} ]"^GRFK5
private static String[] name={ (jCE&'?}
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" YTq>K/
}; uH]n/Kv1,
o([+Pp
private static Sort[] impl=new Sort[]{ s&vOwPmV
new InsertSort(), hHoc7
new BubbleSort(), #]I:}Q51
new SelectionSort(), B$Jn|J"/6
new ShellSort(), 9VIsLk54^
new QuickSort(), ;W#G<M&n'
new ImprovedQuickSort(), x>5#@SX J
new MergeSort(), Hux#v>e
new ImprovedMergeSort(), 8T 6jM+ h
new HeapSort() bt#=p7W
}; &%J{C3Q9
|mrAvm}
public static String toString(int algorithm){ lp?geav
return name[algorithm-1]; 8(%iYs$
} W"|89\p}
FFtj5e
public static void sort(int[] data, int algorithm) { G:'-|h
impl[algorithm-1].sort(data); THK)G2 =
} G <m{o
+98~OInySZ
public static interface Sort { [kz<2P
public void sort(int[] data); e)\s0#
} ~J"*ahl
GVY_u@6
public static void swap(int[] data, int i, int j) { ~9]tt\jN*Y
int temp = data; eUqsvF}l!
data = data[j]; &cDnZ3Q;
data[j] = temp; pz?.(AmU\
} sJ?Fque
} 9ZG.%+l