[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; xp]9Z]J1l
} w@,v$4Oi
int i1=l; (/i|3P
int i2=mid+1; Nlu]f-i':
for(int cur=l;cur<=r;cur++){ Hig.` P
if(i1==mid+1) )k4&S{=
data[cur]=temp[i2++]; uME_/S uO
else if(i2>r) t ^1uj:vD
data[cur]=temp[i1++]; =n8M'
else if(temp[i1] data[cur]=temp[i1++]; >.hDt9@4
else `SS[[FT$>
data[cur]=temp[i2++]; WkPT6d
} J!@R0U.
} &(|x-OT
Z55C4F5v
} ]?Q<lMG
=L{-Hu/j
改进后的归并排序: l}D /1~d
"@Qg]#]JH
package org.rut.util.algorithm.support; Z!l]v.S
!y$+RA7\
import org.rut.util.algorithm.SortUtil; U~oGg$
U/h@Q\~U
/** cPg{k}9Tvy
* @author treeroot A}_pJH
* @since 2006-2-2 hOuHTo^
* @version 1.0 +HG*T[%/
*/ Ss\FSEN!/
public class ImprovedMergeSort implements SortUtil.Sort { y'O<*~C(X
ZM[Z9/S8
private static final int THRESHOLD = 10; 4Ujy_E?^
@eq.&{&
/* `dRqheX
* (non-Javadoc) J_9[xmM
* mo&9=TaG
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Ms-)S7tMz
*/ Jw{duM;]
public void sort(int[] data) { bo@, B
int[] temp=new int[data.length]; er3`ITp:dp
mergeSort(data,temp,0,data.length-1); >qd=lm <,
} D/hq~- g
_7dp(R
private void mergeSort(int[] data, int[] temp, int l, int r) { ZEvK
int i, j, k; g2A#BMe'.$
int mid = (l + r) / 2; js%n]$N
if (l == r) '"'RC O
return; Zx7aae_{
if ((mid - l) >= THRESHOLD) j-ob7(v)*]
mergeSort(data, temp, l, mid); PX`xr1o
else zV(aw~CbZ
insertSort(data, l, mid - l + 1); 6;;2e> e
if ((r - mid) > THRESHOLD) d ,.=9
mergeSort(data, temp, mid + 1, r); 7OS i2
else 4&v&XLkb
insertSort(data, mid + 1, r - mid); *p9k> )'J
B![:fiR`
for (i = l; i <= mid; i++) { [a?bv7Kz
temp = data; Ge^,hAM'
} p"j&s
for (j = 1; j <= r - mid; j++) { $8SSu|O+x
temp[r - j + 1] = data[j + mid]; Y/T-q<ag8
} c;zk{dP
int a = temp[l]; O,S>6o)?
int b = temp[r]; $xcZ{C
for (i = l, j = r, k = l; k <= r; k++) { [JV?Mdzu
if (a < b) { s!>9od6^
data[k] = temp[i++]; @AK&R~<
a = temp; ~$hR:I1
} else { 2 )3oX
data[k] = temp[j--]; %~,Fe7#p
b = temp[j]; <K,X5ctM}
} WNKg>$M
} o[i*i<jv-
} Mc!LC .8
VJ_fA}U
/** radP%W-U
* @param data gGx(mX._L?
* @param l 6a_U[-a9;
* @param i lnLy"f"zV
*/ GlRjbNW?Q
private void insertSort(int[] data, int start, int len) { >Gk<a
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); *ZFF$0}
} {9.UeVz
} z( }w|
} y,6kL2DM
} 3la`S$c
Q"GM3?
堆排序： X%kJ3{
U^%)BI
package org.rut.util.algorithm.support; ! Vlx
e6 x#4YH
import org.rut.util.algorithm.SortUtil; )N607 Fa-
svb7-.!
/** r>TOJVT&]
* @author treeroot :@ VCKq!
* @since 2006-2-2 o?Cc
* @version 1.0 .Dl ?a>I
*/ );6f8H@G
public class HeapSort implements SortUtil.Sort{ MPy><J
1 A0BM
/* (non-Javadoc) !E_|Zp]up
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) :FtV~^Z
*/ U{LS_VI~
public void sort(int[] data) { ZH8w^}
MaxHeap h=new MaxHeap(); xpo^\E?2
h.init(data); o?t H[
for(int i=0;i h.remove(); A9u>bWIE7
System.arraycopy(h.queue,1,data,0,data.length); O!XSU,
} {;& U5<NO
}1~9i'o%Z
private static class MaxHeap{ js"5{w&
b=pk;'-
void init(int[] data){ zwJ&K;"y(
this.queue=new int[data.length+1]; 2nCc(F&+?
for(int i=0;i queue[++size]=data; G/~gF7
fixUp(size); lNyyLLt
} %O"Whe
} g52)/HM
BG?>)]6
private int size=0; xS5 -m6/
~yw]<{?
private int[] queue; 2ww H3}
ss-6b^
public int get() { 1E&S{.
return queue[1]; JJ}DYv
} L3xN#W;m7
2y;vX|lX]
public void remove() { PQSmBTs.
SortUtil.swap(queue,1,size--); EK"/4t{L_
fixDown(1); 0:u:#))1
} &?H$-r1/?V
file://fixdown JW^ ${4
private void fixDown(int k) { oe 6-F)+
int j; 6?KUS}nRS
while ((j = k << 1) <= size) { .IdbaH _a
if (j < size %26amp;%26amp; queue[j] j++; rXD:^wUSc
if (queue[k]>queue[j]) file://不用交换 9wldd*r
break; :}Yk0*
SortUtil.swap(queue,j,k); 'r%(,=L
k = j; 5o>`7(t`
} [w@S/K[_|
} 4}/gV)
private void fixUp(int k) { vn$=be8l4
while (k > 1) { :dULsl$Nz
int j = k >> 1; "49dsKIOH
if (queue[j]>queue[k]) UhS:tT]7
break; z`E=V
SortUtil.swap(queue,j,k); {x,)OgK!{
k = j; Um4zI>
} .-tR <{ g
} -#T%*
zs I?X>4
} &Y=~j?~Xm
a4~B
} K)J_q3qo
w[gt9]}N
SortUtil： JXe~ 9/!
CQ/+- -o
package org.rut.util.algorithm; AkS16A
HOWpTu(
import org.rut.util.algorithm.support.BubbleSort; %?gG-R
import org.rut.util.algorithm.support.HeapSort; ;2`6eyr
import org.rut.util.algorithm.support.ImprovedMergeSort; -A w]b} #v
import org.rut.util.algorithm.support.ImprovedQuickSort; p$1 'e,G
import org.rut.util.algorithm.support.InsertSort; MT>(d*0s
import org.rut.util.algorithm.support.MergeSort; ,Owk;MV@
import org.rut.util.algorithm.support.QuickSort; =oL:|$Pj
import org.rut.util.algorithm.support.SelectionSort; WcKDerc
import org.rut.util.algorithm.support.ShellSort; `IwZVz
L$OZ]
/** -kLBq:M
* @author treeroot <H60rON
* @since 2006-2-2 Z!|r>
* @version 1.0 P`Ku. ONQ
*/ ^lV}![do!
public class SortUtil { 8el6z2
public final static int INSERT = 1; `0]N#G T
public final static int BUBBLE = 2; ' abEY
public final static int SELECTION = 3; A~vx,|I
public final static int SHELL = 4; BI)C\D3[
public final static int QUICK = 5; vPYHM2
public final static int IMPROVED_QUICK = 6; T>nH=
public final static int MERGE = 7; us|Hb
public final static int IMPROVED_MERGE = 8; >^g2Tg:
public final static int HEAP = 9; Posz|u<x
8/)\nV$0Y
public static void sort(int[] data) { Bcv{Y\x;ko
sort(data, IMPROVED_QUICK); WIi,`/K+
} nsi?.c&0!
private static String[] name={ \v-I<"::
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 7=?!B#hm!
}; Ar>JQ@0
)m =xf1
private static Sort[] impl=new Sort[]{ z-gMk@l
new InsertSort(), )Hin{~h
new BubbleSort(), JGvhw,g
new SelectionSort(), BSHS)_xs
new ShellSort(), =ZURh_{xV
new QuickSort(), !~?/D
new ImprovedQuickSort(), P2jh[a%
new MergeSort(), zL+t&P[\
new ImprovedMergeSort(), %eofG]VM<
new HeapSort() F!hjtIkPj
}; 6:%lxG
4s:M}=]N
public static String toString(int algorithm){ B`R@%US
return name[algorithm-1]; %+Nng<_U\T
} (OES~G
g9^\QYh!
public static void sort(int[] data, int algorithm) { Q.Nw#r+m
impl[algorithm-1].sort(data); 0^V<,CAV
} a"YVr'|
P,m+^,
public static interface Sort { j$_?g!I=gK
public void sort(int[] data); lbt8S.fx
} E-Xz
XZ.D<T"
public static void swap(int[] data, int i, int j) { "Ua-7Q&A
int temp = data; Rkk`+0K7$J
data = data[j]; g)Hsd0
data[j] = temp; FEu}zt@
} LvS5N)[
} (Q||5