[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; ?=PQQx2_*u
} YemOP9
int i1=l; 0~FX!1;
int i2=mid+1; rj:$'m7
for(int cur=l;cur<=r;cur++){ ;>CmVC'/
if(i1==mid+1) z:fd'NC
data[cur]=temp[i2++]; <:%Iq13D
else if(i2>r) YJ:CqTy
data[cur]=temp[i1++]; @V<tg"(c
else if(temp[i1] data[cur]=temp[i1++]; NghQ#c
else 2+Fq'!
data[cur]=temp[i2++]; 8, WQ}cC
} }Y-f+qX*
} wuh$=fya
WOg_Pn9HI
} 6X'RCJu%
^ 0TJys%
改进后的归并排序: 40:YJ_n
Q)Ppx7)
package org.rut.util.algorithm.support; NIYAcLa@n8
^K;,,s;0
import org.rut.util.algorithm.SortUtil; 9MGA#a
73]%^kx=
/** %n-LDn
* @author treeroot yyiZV\ /
* @since 2006-2-2 zlXkD~GV
* @version 1.0 3z5,4ps
*/ /,B"H@J
public class ImprovedMergeSort implements SortUtil.Sort { X@\! \
np)-Yzr
private static final int THRESHOLD = 10; a Y{E'K=
!E$S&zVMQ
/* 55yP.@i9J
* (non-Javadoc) ^@tn+'.
* 5g/WQo\
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) D6v0n6w
*/ );$~/H4
public void sort(int[] data) { *emUQ/uvf
int[] temp=new int[data.length]; P~]BB.tog
mergeSort(data,temp,0,data.length-1); !'PPj_Hp]
} %3kqBH!d
.[CXW2k
private void mergeSort(int[] data, int[] temp, int l, int r) { O?{pln
int i, j, k; S&]JY
int mid = (l + r) / 2; QtX ->6P>
if (l == r) .11iulQ
return; m_St"`6 .
if ((mid - l) >= THRESHOLD) <27e7H*6
mergeSort(data, temp, l, mid); 7dW9i7Aj
else (s"_NUj6
insertSort(data, l, mid - l + 1); E8?Q>%_
if ((r - mid) > THRESHOLD) 0gt/JI($
mergeSort(data, temp, mid + 1, r); H:0-.a^ZS
else 8LiRZ"
insertSort(data, mid + 1, r - mid); 43 |zjE
Oj<2_u
for (i = l; i <= mid; i++) { Ujw^j
temp = data; \DfvNeF
} Gz6FwU8L
for (j = 1; j <= r - mid; j++) { ){gOb
temp[r - j + 1] = data[j + mid]; (hmasy6hM
} {kmaMP
int a = temp[l]; )"f>cYF
int b = temp[r]; Q&n|tQ*4
for (i = l, j = r, k = l; k <= r; k++) { iv56zsR
if (a < b) { KiCZEA
data[k] = temp[i++]; 2-{8+*_'
a = temp; JU"!qXQr
} else { bC)<AG@Z\
data[k] = temp[j--]; C#vh2'
b = temp[j]; FUHa"$Bg
} jMd's|#OP
} v&uIxFCR
} JRl8S
ayC*n'
/** v[HxO?x^
* @param data .8wR;^
* @param l *rW]HNz
* @param i ko ~iDT
*/ } |sP;Rpu
private void insertSort(int[] data, int start, int len) { *D`,z3/*
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ~L4"t_-
} qQVqS7 t
} AbfLV942
} }3N8EmS
} NB16O!r
q9!5J2P
堆排序： |F6C&GNYT
OPKm^}
package org.rut.util.algorithm.support; )zr/9aV
UpB7hA
import org.rut.util.algorithm.SortUtil; }g(aZ
t6js@Ih
/** :*Ckq~[Hg
* @author treeroot M@csB.'
* @since 2006-2-2 4W^0K|fq
* @version 1.0 +IJpqFH
*/ /&ph-4\i
public class HeapSort implements SortUtil.Sort{ A$|> Jt
Npq=jlj
/* (non-Javadoc) U:8^>_
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) s31^9a
*/ \'1%"JWK
public void sort(int[] data) { pz-`Tp w
MaxHeap h=new MaxHeap(); V ;>{-p
h.init(data); LscAsq<H<
for(int i=0;i h.remove(); f'r/Q2{n
System.arraycopy(h.queue,1,data,0,data.length); {feS-.Khv
} - FE)
x6F\|nb
private static class MaxHeap{ ZwG+rTW
|a'Q^aT
void init(int[] data){ J'2R-CI,
this.queue=new int[data.length+1]; ZZlR:D
for(int i=0;i queue[++size]=data; [i&z_e)
fixUp(size); 9E (>mN
} AV%Q5Mi}
} !nykq}kPN\
Gt- -7S
private int size=0; 4(Y5n?/
]kKf4SJZFU
private int[] queue; }H^#}
d(fgv
public int get() { TcRnjsY$
return queue[1]; {4:En;
} #=$4U!yL
a^sR?.+3
public void remove() { F3wRHq
SortUtil.swap(queue,1,size--); 4e*0kItC
fixDown(1); %zX'u.}8#
} )rj.WK.
file://fixdown f1\x>W4z~\
private void fixDown(int k) { SxQ|1:i%
int j; R[#5E|` `9
while ((j = k << 1) <= size) { \ iP[iE=
if (j < size %26amp;%26amp; queue[j] j++; So!1l7b
if (queue[k]>queue[j]) file://不用交换 iY(hGlV
break; G+5G,|}
SortUtil.swap(queue,j,k); P.[>x
k = j; {uckYx-A
} MTqbQ69v
} %DRDe
private void fixUp(int k) { Ppx*
while (k > 1) { 5[*MT%ms
int j = k >> 1; w.0.||C O
if (queue[j]>queue[k]) l~f +h?cF
break; ~\iuV
SortUtil.swap(queue,j,k); SSI&WZ2a
k = j; fM2[wh@
} O;,k~
} _I'O4s1S
ClfpA?vv
} ?xeq*<qfI
a(}jn|
} 8q0f#/`v
I>P</TE7
SortUtil： &[3!Lk`.0
EA8(_}
package org.rut.util.algorithm; %:oGyV7a
BkO"{
import org.rut.util.algorithm.support.BubbleSort; j^64:3
import org.rut.util.algorithm.support.HeapSort; t+?\4+!<
import org.rut.util.algorithm.support.ImprovedMergeSort; o-x_[I|@
import org.rut.util.algorithm.support.ImprovedQuickSort; [;X YT
import org.rut.util.algorithm.support.InsertSort; ~I'Z=Wo
import org.rut.util.algorithm.support.MergeSort; *X<De
import org.rut.util.algorithm.support.QuickSort; jCa{WV:K}
import org.rut.util.algorithm.support.SelectionSort; }hBv?B2/1
import org.rut.util.algorithm.support.ShellSort; gi"v${R
xr6Q5/p1
/** |-e=P9,
* @author treeroot iP_rEi*-J
* @since 2006-2-2 M)b`~|Wt
* @version 1.0 ? th+~dE
*/ -'8|D!>v2
public class SortUtil { ?8~$du$
public final static int INSERT = 1; Um9=<*p
public final static int BUBBLE = 2; Gn_v}31d%
public final static int SELECTION = 3; -''vxt?7H&
public final static int SHELL = 4; {8"W
public final static int QUICK = 5; :ss9-
public final static int IMPROVED_QUICK = 6; [hFyu|I!
public final static int MERGE = 7; Z:n33xh=<
public final static int IMPROVED_MERGE = 8; .{8lG^0U<
public final static int HEAP = 9; -D V;{8U4
3^`bf=R
public static void sort(int[] data) { w=f8UtY9@A
sort(data, IMPROVED_QUICK); ^Xb!dnT.*a
} JP@UvDE|
private static String[] name={ mKn[>M1
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 0,/[r/=jT
}; @-MrmF)<U
Dxu)by
private static Sort[] impl=new Sort[]{ _VMJq9.
new InsertSort(), ! q1Ql18n
new BubbleSort(), {+`ep\.$&
new SelectionSort(), XRNL;X%}7
new ShellSort(), Xi|v!^IT
new QuickSort(), Sa<R8X'J
new ImprovedQuickSort(), pF8'S{y
new MergeSort(), vJcvyz#%1
new ImprovedMergeSort(), 61C&vm
new HeapSort() p]aIMF_
}; {@3=vBl%O+
_c #P
public static String toString(int algorithm){ U O[p
return name[algorithm-1]; m<076O4|`
} hA~}6Qn
JHMj4Zkp
public static void sort(int[] data, int algorithm) { ?Ts Z_
impl[algorithm-1].sort(data); WK<pZ *x
} @yek6E&9
pYa<u,>pN
public static interface Sort { :Z+(H+lyZ
public void sort(int[] data); 5 WAsEP
} Dic(G[
Uz62!)
public static void swap(int[] data, int i, int j) { $[1 M2>[
int temp = data; ,Qh4=+jwqn
data = data[j]; y\%4Dir
data[j] = temp; t71 0sWh{
} 4 A
} F'h[g.\}