[JAVA]用Java实现的各种排序

ヾ1.嗰rёn

级别: 终身会员

发帖: 3743

铜板: 8

人品值: 493

贡献值: 9

交易币: 0

好评度: 3746

信誉值: 0

金币: 0

所在楼道

只看楼主更多操作楼层直达

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; Pm^lr!3p
} s}(X]Gx1
int i1=l; PN &|8_
int i2=mid+1; \Ye%o}.{
for(int cur=l;cur<=r;cur++){ O]{*(J/t
if(i1==mid+1) S}cF0B1E*
data[cur]=temp[i2++]; Qh-4vy=r
else if(i2>r) ^|?1_r
data[cur]=temp[i1++]; CH;;V3
else if(temp[i1] data[cur]=temp[i1++]; J8;Okzb!L
else dy:d=Z
data[cur]=temp[i2++]; t`u!]DHv
} I4ilR$jg
} /DO'IHC.o
4j3oT)+8
} GN%(9N'W
V]c5 Z$Bd
改进后的归并排序: L~eAQR
LgHJo-+>
package org.rut.util.algorithm.support; "'A"U
c7qwNs*f
import org.rut.util.algorithm.SortUtil; 54q3R`y
C).2gQ G
/** zu<3^=3
* @author treeroot )ooWQ-%P
* @since 2006-2-2 C3S`}o.
* @version 1.0 e<5Y94YE
*/ q#vlBL
public class ImprovedMergeSort implements SortUtil.Sort { bx>i6 R2
>Z\BfH
private static final int THRESHOLD = 10; Bq!cY Wj
L'9N9CR{i
/* XP;x@I#l
* (non-Javadoc) Y {c5
* Wsm`YLYkt!
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) cOku1g8
*/ ]W) jmw'mo
public void sort(int[] data) { m;/i<:`
int[] temp=new int[data.length]; <y>:B}9'
mergeSort(data,temp,0,data.length-1); ~m`!;rE
} }.{}A(^YR
EXpSh}
private void mergeSort(int[] data, int[] temp, int l, int r) { I]uhi{\C
int i, j, k; >V!LitdJ
int mid = (l + r) / 2; 5I,$EGG
if (l == r) )|]Z>>%t
return; (ZPXdr
if ((mid - l) >= THRESHOLD) OD+5q(!"a
mergeSort(data, temp, l, mid); J70D+
else a$}mWPp+f
insertSort(data, l, mid - l + 1); v8@eW.I1
if ((r - mid) > THRESHOLD) z[&s5"
mergeSort(data, temp, mid + 1, r); )saR0{e0N
else 9?`RR/w
insertSort(data, mid + 1, r - mid); QzthTX<
JBcY!dy-d
for (i = l; i <= mid; i++) { 77Q}=80GU;
temp = data; \G;CQV#{9
} `ROEV~
for (j = 1; j <= r - mid; j++) { 8tQ|-l*
temp[r - j + 1] = data[j + mid]; "mZ.V
} =! mJG
int a = temp[l]; SS8ocGX
int b = temp[r]; Z> 74.r
for (i = l, j = r, k = l; k <= r; k++) { DQgH_!
if (a < b) { p4mY0Y]mP
data[k] = temp[i++]; DO^y;y>
a = temp; NWKi ()nA%
} else { jA`a/vWu
data[k] = temp[j--]; KQ)T(mIqp
b = temp[j]; F6dr
} 6?SFNDQ"C
} Qpu3(`d<
} !N~*EI$
\ 4gXY$`@
/** -g~~]K%
* @param data IZ~.{UQ
* @param l /`+7_=-
* @param i l)8sw=
*/ .#!mDlY;
private void insertSort(int[] data, int start, int len) { 9X]f[^
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ;[Tyt[
} C1QWU5c v
} {tt$w>X
} kxo.v|)8
} p\S8oHWe
(~#G'Hd
堆排序： 7a<_BJXx
c{>|o
package org.rut.util.algorithm.support; 3*WS"bt
3w'W~
import org.rut.util.algorithm.SortUtil; ;0j*>fb\q7
u^=@DO'
/** 8^X]z|[d2
* @author treeroot Mi74Xl i
* @since 2006-2-2 M=%!IT
* @version 1.0 Wc;+2Hl[@
*/ sqG`"O4W
public class HeapSort implements SortUtil.Sort{ DHzkRCM
kfCKhx
/* (non-Javadoc) $4Y&j}R
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) mP!N<K
*/ *Sb2w*c>
public void sort(int[] data) { Z| L2oce
MaxHeap h=new MaxHeap(); mV zu~xym
h.init(data); O+FBQiv
for(int i=0;i h.remove(); )ddsyFGW
System.arraycopy(h.queue,1,data,0,data.length); XRa#21pQ
} 4Hd Si
o<J5!
private static class MaxHeap{ ;[~^(. f
UE7'B?
void init(int[] data){ ysVi3eq
this.queue=new int[data.length+1]; H),RA]S
for(int i=0;i queue[++size]=data; KZ3B~#oQ
fixUp(size); 4\1;A`2%0
} K;C_Z/<%
} 8[HZ@@
_BwKY#09Zp
private int size=0; jGiw96,Y
|."G?*
private int[] queue; H:Lt$
1p=&WM
public int get() { DZP*x
return queue[1]; Y?t2,cm
} l $w/Fz
J{!'f| J
public void remove() { 2_N/wR#=&
SortUtil.swap(queue,1,size--); J7m`]!*t
fixDown(1); o}W;Co
} B~rU1Y)
file://fixdown @it/$>R^)
private void fixDown(int k) { {\Ys@FF
int j; NQ{-&#@/v
while ((j = k << 1) <= size) { R9r)C{63S&
if (j < size %26amp;%26amp; queue[j] j++; feN!_-
if (queue[k]>queue[j]) file://不用交换 $^IjFdD
break; yF;?Hg
SortUtil.swap(queue,j,k); GVZTDrC
k = j; vlAy!:CV
} H\d;QN9Q;
} :ovt?q8">
private void fixUp(int k) { ,@479ZvvR3
while (k > 1) { vgN@~Xa
int j = k >> 1; 4`6< {
if (queue[j]>queue[k]) u9,=po=+7f
break; 18rp; l{
SortUtil.swap(queue,j,k); c l9$g7
k = j; S<9gyW
} @x*.5:[
} N:7.:Yw
1[px`%DR~
} s*eyTm
eZA6D\
} r\B"?oqC
gz#+
SortUtil： 7<vy;"wB
8M~u_`6
package org.rut.util.algorithm; 1NW>wo
ePi Z
import org.rut.util.algorithm.support.BubbleSort; 8a?IC|~Pz
import org.rut.util.algorithm.support.HeapSort; 0+rW;-_(
import org.rut.util.algorithm.support.ImprovedMergeSort; k}#@8n|b
import org.rut.util.algorithm.support.ImprovedQuickSort; K` 2i
import org.rut.util.algorithm.support.InsertSort; Vl-D<M+ih
import org.rut.util.algorithm.support.MergeSort; !%X>rGkc
import org.rut.util.algorithm.support.QuickSort; b13nE.
import org.rut.util.algorithm.support.SelectionSort; ["<5?!bU
import org.rut.util.algorithm.support.ShellSort; waBRQh
M*v^N]>"G
/** 7WXiG0
* @author treeroot 75<el.'H
* @since 2006-2-2 5%'o%`?i
* @version 1.0 _@7(g(pY 3
*/ >}mNi:6xq
public class SortUtil { % /~os2R
public final static int INSERT = 1; S3nB:$_-;
public final static int BUBBLE = 2; 9#ZzE/
public final static int SELECTION = 3; r!CA2iK`
public final static int SHELL = 4; 87R%ke
public final static int QUICK = 5; w' .'Yu6
public final static int IMPROVED_QUICK = 6; LE<:.?<Z-
public final static int MERGE = 7; MK<
public final static int IMPROVED_MERGE = 8; :{x!g6bK@
public final static int HEAP = 9; ' l|41wxk
LAj}kW~
public static void sort(int[] data) { |C^ c0
sort(data, IMPROVED_QUICK); 0kkRK*fp}x
} /5&3WG&<u
private static String[] name={ Pv^(Q]
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Q S5dP
}; fLLnf].O
]r"31.w(
private static Sort[] impl=new Sort[]{ .i1jFwOd|G
new InsertSort(), USlF+RY@3L
new BubbleSort(), U+(Z#b(Q
new SelectionSort(), ?ykVfO'
new ShellSort(), [Od>NO,n+]
new QuickSort(), 5cPSv?x^F@
new ImprovedQuickSort(), NEjPU#@c
new MergeSort(), R>Z,TQU
new ImprovedMergeSort(), b #o}=m
new HeapSort() =x|##7
}; Fr1;)WV
>xhd[
public static String toString(int algorithm){ rD:gN%B=
return name[algorithm-1]; Km|9Too
} )$2%&9b
2+c>O%L
public static void sort(int[] data, int algorithm) { Jnh;;<
impl[algorithm-1].sort(data); 0"wbcAh)
} S3%.-)ib
DDqC}l_
public static interface Sort { tJ(c<:zD
public void sort(int[] data); -D.BJ(
} YyQf
pgLzFY['
public static void swap(int[] data, int i, int j) { y9l#;<b
int temp = data; `dG.L
data = data[j]; +X2 i/}
data[j] = temp; ];d5X
} /-G qG)PX
} G#9o?