[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; TU}./b@F
} 8PtX@s43\
int i1=l; BFH=cs
int i2=mid+1; tX7TP(
for(int cur=l;cur<=r;cur++){ _l||69|.
if(i1==mid+1) !y syb
data[cur]=temp[i2++]; {H[3[
else if(i2>r) "?SR+;Y:q
data[cur]=temp[i1++]; UVj1nom
else if(temp[i1] data[cur]=temp[i1++]; -P[bA0N,
else "pW@[2Dkx/
data[cur]=temp[i2++]; TSHH=`cx
} Z&Ao;=Gp1
} A!.* eIV|
F|&=\Q
} (X(c.Jj
<Z^qBM
改进后的归并排序: +U= !svE
RuuXDuu:VL
package org.rut.util.algorithm.support; V07? sc<
1H]E:Bq
import org.rut.util.algorithm.SortUtil; B#Z-kFn@
'Bb@K[=s
/** /woC{J)4p
* @author treeroot <N}*|z7=b
* @since 2006-2-2 ![CF >:e
* @version 1.0 fS?fNtD6<
*/ k%fy
public class ImprovedMergeSort implements SortUtil.Sort { #7yy7Y5
AagWswv{Bf
private static final int THRESHOLD = 10; 8j<+ ' R
9o|#R&0
/* QQIU5
* (non-Javadoc) ?QfomTT
* !|`vW{v
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) +KKx\m*
*/ -|x YT+?%
public void sort(int[] data) { oq3{q
int[] temp=new int[data.length]; =as\Tp#d
mergeSort(data,temp,0,data.length-1); t?404
} )o>1=Y`[z
8w]>SEGFs
private void mergeSort(int[] data, int[] temp, int l, int r) { g{%2*{;i
int i, j, k; _rjLCvv-
int mid = (l + r) / 2; O| zLD
if (l == r) /aHx'TG
return; 5'hQ6i8
if ((mid - l) >= THRESHOLD) wc7F45l4
mergeSort(data, temp, l, mid); *zn=l+c
else <=7N2t)s4
insertSort(data, l, mid - l + 1); K`% I!Br
if ((r - mid) > THRESHOLD) @!zT+W&
mergeSort(data, temp, mid + 1, r); cA]Ch>]A%
else wc6v:,&
insertSort(data, mid + 1, r - mid); Pu7cL
At=l>
for (i = l; i <= mid; i++) { Y\1XKAfB
temp = data; ` "JslpN
} KQ\d$fX
for (j = 1; j <= r - mid; j++) { TDnbX_xC<
temp[r - j + 1] = data[j + mid]; P2^((c
} .ugQH<B
int a = temp[l]; Yt% E,U~g
int b = temp[r]; <{yQNXf[
for (i = l, j = r, k = l; k <= r; k++) { 4hh=z>$|l)
if (a < b) { O)i]K`jk
data[k] = temp[i++]; </B5^}
a = temp; Jb4A!g5C
} else { UZq1qn@+
data[k] = temp[j--]; *)H&n>"e
b = temp[j]; Vn1hr;i]
} Wr+1G 8
} RIQw+RG>
} ,)JSXo
2r~&+0sBP
/** =-GHs$u%f
* @param data *zR
* @param l `*hrU{b
* @param i baVSQtda
*/ J)xc mK
private void insertSort(int[] data, int start, int len) { U&<Nhh
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 61^5QHur
} "TgE@bC
} |+0XO?,sZ
} >HH49cCo
} SWGD(]}uz
%: .{?FB_
堆排序： Oor&1
=z$XqT.'
package org.rut.util.algorithm.support; %95'oW)lo
U'tfsf/V
import org.rut.util.algorithm.SortUtil; 0 w#[?.
30Z RKrW"~
/** 8Qg,UX
* @author treeroot )|@ H#kv?
* @since 2006-2-2 [# '38
* @version 1.0 0u'qu2mV
*/ +Eh^j3W
public class HeapSort implements SortUtil.Sort{ :W\xZ
+#c3Y;JP
/* (non-Javadoc) *Tt*\ O
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) \|}dlG
*/ `=h`:`
public void sort(int[] data) { iS"(
MaxHeap h=new MaxHeap(); WhR j@y
h.init(data); 0H-~-z8Y
for(int i=0;i h.remove(); {LLy4m
System.arraycopy(h.queue,1,data,0,data.length); KiJRq>
} M9/c8zZ
YIQm;EEG
private static class MaxHeap{ 8,,$C7"EP
9O+><x[i
void init(int[] data){ NZyGC Vh@
this.queue=new int[data.length+1]; rK\)
for(int i=0;i queue[++size]=data; :OVre*j
fixUp(size); jB17]OCN
} H-sJt:
} 1.Ximom
8SGFzb! h
private int size=0; WYb\vm=r
v{}i`|~J
private int[] queue; ZO2$Aan
cv b:FK
public int get() { {5=Iu\e
return queue[1]; bJo)rM:m
} y@kRJ 8d
V2I"m
public void remove() { 4Em mh=A
SortUtil.swap(queue,1,size--); X&[S.$_U
fixDown(1); $`Z-,AJc
} AAr[xoiYp
file://fixdown 3YG[~o|4
private void fixDown(int k) { Dg$Z5`%k8
int j; . _5g<aw;
while ((j = k << 1) <= size) { V^P]QQ\ )
if (j < size %26amp;%26amp; queue[j] j++; DB'd9<
if (queue[k]>queue[j]) file://不用交换 TRl,L5wd-?
break; e `!PQMLU
SortUtil.swap(queue,j,k); X4:\Shb97
k = j; 1jJ>(S
} nl)!)t=n
} XA~Cc<v
private void fixUp(int k) { n4cM /unU
while (k > 1) { vap,)kILF
int j = k >> 1; MqBA?7
if (queue[j]>queue[k]) J2$L[d^
break; +P?!yH,n
SortUtil.swap(queue,j,k); >[=fbL@N<@
k = j; G/nSF:rp
} ?v-( :OF
} Gk9Y{
tSVN}~1\
} ,m-z D
?mJNzHrq;
} cuO)cj]@e
NW'rqgG
SortUtil： Q2c|sK8
W)dQyZ>J
package org.rut.util.algorithm; ad "yo=%1
ieN}Ajl2
import org.rut.util.algorithm.support.BubbleSort; 8IYn9<L
import org.rut.util.algorithm.support.HeapSort; Q`"gKBN1
import org.rut.util.algorithm.support.ImprovedMergeSort; QkXnXu
import org.rut.util.algorithm.support.ImprovedQuickSort; 9Ij=~p]p
import org.rut.util.algorithm.support.InsertSort; %T hY6y(
import org.rut.util.algorithm.support.MergeSort; z+K-aj w
import org.rut.util.algorithm.support.QuickSort; iNX%Zk[
import org.rut.util.algorithm.support.SelectionSort; h01 HX
import org.rut.util.algorithm.support.ShellSort; Fb&Xy{kt1
e`pYO]Z
/** Ak`7f$z
* @author treeroot :Yi1#
* @since 2006-2-2 @5!Mr5;
* @version 1.0 y9cDPwi:b
*/ }fps~R
public class SortUtil { >+iJ(jqq
public final static int INSERT = 1; *;QIAd
public final static int BUBBLE = 2; b^wL{q
public final static int SELECTION = 3; &_-,Nxsf
public final static int SHELL = 4; l^ P[nQDH
public final static int QUICK = 5; "<3F[[;~
public final static int IMPROVED_QUICK = 6; 6>rgoT)6~
public final static int MERGE = 7; mRe BS
public final static int IMPROVED_MERGE = 8; si:p98[w
public final static int HEAP = 9; UEZnd8
p5|.E
public static void sort(int[] data) { +FD"8 ^YC
sort(data, IMPROVED_QUICK); :Ve>tZeW
} :.863_/
private static String[] name={ kdVc;v/5
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" _i_^s0J
}; g.wp }fz
|JZ3aS
private static Sort[] impl=new Sort[]{ v~f_~v5J!
new InsertSort(), #k%$A}9
new BubbleSort(), &cDLSnR
new SelectionSort(), Hc`)Q vFRW
new ShellSort(), UF3g]>*
new QuickSort(), ~=$0=)c
new ImprovedQuickSort(), J9!}8uD
new MergeSort(), j_::#?o!/
new ImprovedMergeSort(), _4eSDO[h
new HeapSort() !c}?u_Z/
}; "gD]K=
E8_j?X1
public static String toString(int algorithm){ MKqMH,O
return name[algorithm-1]; T5* t~`bfU
} ch|4"&g
sw<mmayN
public static void sort(int[] data, int algorithm) { 0(!j]w"r3
impl[algorithm-1].sort(data); 2YT1]x 3
} |mx)W}
97/"5i9
public static interface Sort { =:)p\{B
public void sort(int[] data); }HO3D.HE^
} ,8~qnLy9
'Z(KE2&?
public static void swap(int[] data, int i, int j) { b.h:~ATgN
int temp = data; Gjhpi5?%8
data = data[j]; 'R'P^
data[j] = temp; Yp*Dd}n`
} )qDCh
} 7ojU]ly