[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; 8Cv?Z.x5
} {(?4!rh
int i1=l; pmYHUj #
int i2=mid+1; !Xw5<J3L-
for(int cur=l;cur<=r;cur++){ (C)p9-,
if(i1==mid+1) |sZHUf_
data[cur]=temp[i2++]; BfiD9ka-z
else if(i2>r) ~7Ux@Sx;
data[cur]=temp[i1++]; ;xn0;V'=
else if(temp[i1] data[cur]=temp[i1++]; 9-m=*|p
else Qe(:|q_
data[cur]=temp[i2++]; ku M$UYTTX
} ,MIV=*
} 7Fsay+a
@9|hMo
} PeEj&4k
|! "eWTJ
改进后的归并排序: 6D_D';o
o3}3p]S\
package org.rut.util.algorithm.support; % %UE+u@J
Y\'}a+:@Ph
import org.rut.util.algorithm.SortUtil; +x}<IS8
?|Zx!z ($
/** bi;1s'Y<D
* @author treeroot g< .qUBPKX
* @since 2006-2-2 13/]DF,S"^
* @version 1.0 P{^6v=8)
*/ C+&l< fM&
public class ImprovedMergeSort implements SortUtil.Sort { Eu04e N
seeBS/%
private static final int THRESHOLD = 10; ZqO^f*F>h
18:%~>.!
/* 0+b1vhQ
* (non-Javadoc) FHI ;)wn=
* ENY+^7
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) cj5+NM"
*/ ]5:8Z@
public void sort(int[] data) { Pj%|\kbNs
int[] temp=new int[data.length]; o2\8OxcA
mergeSort(data,temp,0,data.length-1); R@rBEW&
} d m%8K6|
%H"47ZFxAs
private void mergeSort(int[] data, int[] temp, int l, int r) { sCHJ&>m5-
int i, j, k; "C`Ub
int mid = (l + r) / 2; [}]Q?*_
if (l == r) GWip-wI
return; KKf
if ((mid - l) >= THRESHOLD) P7/X|M z
mergeSort(data, temp, l, mid); FaJ&GOM,
else M\Kx'N
insertSort(data, l, mid - l + 1); E-g_".agO
if ((r - mid) > THRESHOLD) `*KHSA
mergeSort(data, temp, mid + 1, r); jRV/A!4
else v|2T%y_ u
insertSort(data, mid + 1, r - mid); N ZSSg2TX#
=w0R$&b&
for (i = l; i <= mid; i++) { :*\Pn!r
temp = data; bA->{OPkT
} 45>?o
for (j = 1; j <= r - mid; j++) { Yg1X
temp[r - j + 1] = data[j + mid]; !g2+w$YVa
} sD wqH.L
int a = temp[l]; lHX72s|V
int b = temp[r]; 8}UIbF
for (i = l, j = r, k = l; k <= r; k++) { b|W=pSTY
if (a < b) { $E.I84UfX
data[k] = temp[i++]; N]sAji*
a = temp; ?FcAXA/J{
} else { icK/],
data[k] = temp[j--]; "'\$ g[k
b = temp[j]; q'82qY
} HHsmLo c4
} P";'jVcR
} 0lR5<^B
~e@z;]CiY
/** TRq6NB
* @param data "9e\c;a
* @param l v_-dx
* @param i c0u^zH<
*/ DR<9#RRD
private void insertSort(int[] data, int start, int len) { G'A R`"F
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); sON|w86B
} b SU~XGPB
} =C.$ UX
} 7Jho}5J
} ~Jz6O U*z
[hj6N*4y
堆排序： S^\Vgi(
kW&TJP+5*
package org.rut.util.algorithm.support; [IhYh<i
TWFr 4-
import org.rut.util.algorithm.SortUtil; X}\:_/
3/n5#&c\4
/** RrQJ/ts7}
* @author treeroot 9-*uPK]m9
* @since 2006-2-2 omBoo5e
* @version 1.0 s!7y
*/ k+pr \d~
public class HeapSort implements SortUtil.Sort{ p=}Nn(
65Yv4pNL
/* (non-Javadoc) Q$@I"V&G.
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) *bA.zmzM
*/ "1M[5\Ax
public void sort(int[] data) { TbW38\>.R
MaxHeap h=new MaxHeap(); jtc]>]6i
h.init(data); NHZz _a=
for(int i=0;i h.remove(); 9mTJ|sN:e
System.arraycopy(h.queue,1,data,0,data.length); hZ
} ;MdlwQ$`
_zi|
private static class MaxHeap{ WEi2=3dV
@2 fg~2M1
void init(int[] data){ E09:E
this.queue=new int[data.length+1]; iAIuxO
for(int i=0;i queue[++size]=data; G*P#]eO
fixUp(size); ^3L0w}#
} 7E~;xn;
} fS78>*K
wi6 ~}~%
private int size=0; j+ 0I-p
VS8Rx.?
private int[] queue; ]-/VHh
?2Py_gkf
public int get() { -C?ZB}`
return queue[1]; L0WN\|D
} b!5~7Ub.No
XuM'_FN`A<
public void remove() { 2!=f hN
SortUtil.swap(queue,1,size--); *YuF0Yt
fixDown(1); 9m~p0ILh
} *wB1,U{
file://fixdown QE`bSI
private void fixDown(int k) { e h?zNu2=
int j; q'Tf,a
while ((j = k << 1) <= size) { ExL0?FemWV
if (j < size %26amp;%26amp; queue[j] j++; L>4"(
if (queue[k]>queue[j]) file://不用交换 -4{<=y?"a
break; LuvY<~u
SortUtil.swap(queue,j,k); lp%pbx43s
k = j; .jjG(L
} H]Z$OpI
} tG22#F`
private void fixUp(int k) { t=W}SH
while (k > 1) { mSl.mi(JiZ
int j = k >> 1; K^<BW(s
if (queue[j]>queue[k]) +}os&[S
break; UhQj Qaa~
SortUtil.swap(queue,j,k); 0[?Xxk}s0
k = j; ?QdWrE_
} PP33i@G
} 57
[~c|mOk
} a'yK~;+_9
ML56k~"BL
} dk4CpN
VY=jc~c]v
SortUtil： |"CZT#
5(Q%XQV*P
package org.rut.util.algorithm; y,,dCca
PmEsN&YP]
import org.rut.util.algorithm.support.BubbleSort; 4yA+h2
import org.rut.util.algorithm.support.HeapSort; 0rs"o-s<
import org.rut.util.algorithm.support.ImprovedMergeSort; ;RPx^X~
import org.rut.util.algorithm.support.ImprovedQuickSort; j/c&xv7=
import org.rut.util.algorithm.support.InsertSort; Sp]0c[37R
import org.rut.util.algorithm.support.MergeSort; eiaFaYe\
import org.rut.util.algorithm.support.QuickSort; XW)lDiJl
import org.rut.util.algorithm.support.SelectionSort; o~y;j75{.*
import org.rut.util.algorithm.support.ShellSort; c2 C8g1n
2B&3TLO
/** 4*cEag
* @author treeroot w;:*P
* @since 2006-2-2 }-2 2XYh
* @version 1.0 `%"\@<
*/ #r~# I}U
public class SortUtil { YWO)HsjP
public final static int INSERT = 1; bI9~jWgGp
public final static int BUBBLE = 2; .:%0E`E
public final static int SELECTION = 3; Zaf:fsj>
public final static int SHELL = 4; jZkcBIK2
public final static int QUICK = 5; yEoF4bt
public final static int IMPROVED_QUICK = 6; Ww+IWW@
public final static int MERGE = 7; Ad9}9!<
public final static int IMPROVED_MERGE = 8; x,pjpx
public final static int HEAP = 9; l'E*=Rn
paE[rS\
public static void sort(int[] data) { 3J|F?M"N7
sort(data, IMPROVED_QUICK); }?_?V&K|
} 4-y:/8
private static String[] name={ By",rD- r
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" :v&$o'Sak
}; |a`Sc%
u$Jz~:=,
private static Sort[] impl=new Sort[]{ .|>3k'<l
new InsertSort(), ep)n_!$OH"
new BubbleSort(), `V)8 QRN(
new SelectionSort(), +`3)oPV)
new ShellSort(), ' ;FnIZ
new QuickSort(), |tMWCA
new ImprovedQuickSort(), E`usknf>l
new MergeSort(), Hc$O{]sq
new ImprovedMergeSort(), a;qryUyG
new HeapSort() ~#[yJNYQ
}; .K2qXw"S#
n&qg;TT
public static String toString(int algorithm){ ;LPfXpR
return name[algorithm-1]; ^Hnb}L
} &P}_bx
UapC"XYJ
public static void sort(int[] data, int algorithm) { aU "8{
impl[algorithm-1].sort(data); li'YDtMKCY
} :B5Fdp3
RVA(Q[ ;
public static interface Sort { Val|n*%
public void sort(int[] data); :W.(S6O(
} p\tm:QWD;
kY|utoAP
public static void swap(int[] data, int i, int j) { rIu$pZO
int temp = data; S\YTX%Xm}
data = data[j]; gw3K+P
data[j] = temp; S.94edQ
} K6/Q}W
} CR`Q#Yi