[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; z(EpJK=`_
} /Ov1eQBNG
int i1=l; :@eHV=|+>
int i2=mid+1; =Y5m% ,Bq
for(int cur=l;cur<=r;cur++){ y7%SHYC p[
if(i1==mid+1) t\TxK7i
data[cur]=temp[i2++]; &flRrJ
else if(i2>r) |\/\FK]?]
data[cur]=temp[i1++]; YDj5+'y
else if(temp[i1] data[cur]=temp[i1++]; 29VX-45
else os&FrtDg
data[cur]=temp[i2++]; +|7N89l
} >d *`K
} /y6f~F
]61HQ
} !pkIaCxs
dv+ZxP%g
改进后的归并排序: jzGK(%sw"
G%AO%II
package org.rut.util.algorithm.support; k_ywwkG9lU
6-0sBB9=u
import org.rut.util.algorithm.SortUtil; EtaKo}!A}
V*5v JF0j
/** W$()W)
* @author treeroot kS=nH9
* @since 2006-2-2 G6}&k[d5%
* @version 1.0 iyd$_CJz
*/ Uzc p
public class ImprovedMergeSort implements SortUtil.Sort { 'GX x|.
VJT /9O)Z|
private static final int THRESHOLD = 10; sQ,xTWdj
R! On
/* \AH5zdK
* (non-Javadoc) 0t}v@-abU
* c$^v~lQS
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) BRskxyL&,
*/ l|E4 7@#
public void sort(int[] data) { (GC5r#AnS
int[] temp=new int[data.length]; H9_iTGBQ
mergeSort(data,temp,0,data.length-1); \w>Rmf'|
} nqo1+OR
S50}]5K
private void mergeSort(int[] data, int[] temp, int l, int r) { a$Y{ut0t(
int i, j, k; ~:o$}`mW
int mid = (l + r) / 2; kWVk^,
if (l == r) OFyy!r@?
return; C;K+ITlJ
if ((mid - l) >= THRESHOLD) vmrs(k "d#
mergeSort(data, temp, l, mid); SA&(%f1d
else <FBBR2
insertSort(data, l, mid - l + 1); =b>TFB=*N
if ((r - mid) > THRESHOLD) f\_PNZCc
mergeSort(data, temp, mid + 1, r); Sw,*#98
else l~f3J$OkJ
insertSort(data, mid + 1, r - mid); D&2NO/ R
gh\u@#$8
for (i = l; i <= mid; i++) { :Dw_$
temp = data; n8=Dzv0
} 1Q!^*D
for (j = 1; j <= r - mid; j++) { :q*w_*w
temp[r - j + 1] = data[j + mid]; uax0%~O\
} 5X+`aB
int a = temp[l]; 2|& S2uq
int b = temp[r]; +h+ 7Q'k
for (i = l, j = r, k = l; k <= r; k++) { ~mXzQbe p
if (a < b) { h ~yTkN]
data[k] = temp[i++]; 7x>^ip"7
a = temp; zEtsMU
} else { '@hUmrl
data[k] = temp[j--]; La9}JvQoX
b = temp[j]; d94k
} E z}1Xse
} nb=mY&q}~
} ox&?`DO
IauLT;!X
/** .\ fpjQW
* @param data *nJ,|T
* @param l 0Atha>w^o~
* @param i z{\tn.67
*/ |e2s\?nB0S
private void insertSort(int[] data, int start, int len) { ud5}jyJ
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); L{&2 P
} =LV-n
} jIe /X]
} Q\kWQOB_
} Q;y5E`G
6JZ>&HA
堆排序： e( @</W
WVpx
package org.rut.util.algorithm.support; '%ilF1#
]goJ- &
import org.rut.util.algorithm.SortUtil; 7AT8QC`u
aHuMm&
/** }RadbJ{q=
* @author treeroot P8By~f32_
* @since 2006-2-2 EG`AkWy
* @version 1.0 DoQ^caa@
*/ I]W7FZ=o
public class HeapSort implements SortUtil.Sort{ u3O@ccJ;
EniV-Uj\D
/* (non-Javadoc) ?.< Qgd
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) )SJM:E
*/ i'H]N8,A
public void sort(int[] data) { Sxc)~y
MaxHeap h=new MaxHeap(); TCRTC0_}k
h.init(data); |\uj(|
for(int i=0;i h.remove(); P8X9bW~GQ
System.arraycopy(h.queue,1,data,0,data.length); uXFI7vV6P
} K |=o-
H%Vf$1/TF
private static class MaxHeap{ z;oia!9z
T~/>U&k}J
void init(int[] data){ hGV_K"~I0
this.queue=new int[data.length+1]; PZqp;!:xz
for(int i=0;i queue[++size]=data; .tG3g:
fixUp(size); uoE+:,P
} @H#Fzoo.
} 1T|")D
d)!'5ZrM
private int size=0; q:)PfP+
}FS_"0
private int[] queue; U"8Hw@
80lhhqRC
public int get() { #N`G2}1J
return queue[1]; lq_UCCnv5
} 2c[HA
0M;El2 P$
public void remove() { %/e'6g<
SortUtil.swap(queue,1,size--); <t(H+ykh
fixDown(1); 9FSa=<0wE
} +8Q @R)3
file://fixdown "t^RZ45
private void fixDown(int k) { sz270k%[
int j; eC<RM Q4
while ((j = k << 1) <= size) { |g}r
if (j < size %26amp;%26amp; queue[j] j++; };rp25i
if (queue[k]>queue[j]) file://不用交换 x1g-@{8]j
break; k%~;mu"4}
SortUtil.swap(queue,j,k); J#Y0R"fo
k = j; dF51_Kk
} {'+{ASpO!
} >>J$`0kM*
private void fixUp(int k) { q%d'pF
while (k > 1) { ~{{S<S v
int j = k >> 1; TC<Rg?&yb
if (queue[j]>queue[k]) Ng;?hTw
break; s'N<
SortUtil.swap(queue,j,k); 3S_H&>K
k = j; ~tfd9,t
} LYYz=oZOE!
} FYFlh^}
\8ZVI98
} hx@@[sKF7
X(E`cH |
} o9| OL
YBj*c$.D0
SortUtil： Xa>'DO2
mgH~GKf^
package org.rut.util.algorithm; @0EY5{&
1mtYap4
import org.rut.util.algorithm.support.BubbleSort; UZFs]z!,k
import org.rut.util.algorithm.support.HeapSort; }XUI1H]jk
import org.rut.util.algorithm.support.ImprovedMergeSort; i^:#*Q-co
import org.rut.util.algorithm.support.ImprovedQuickSort; k*2khh-
import org.rut.util.algorithm.support.InsertSort; I:DAn!N-A*
import org.rut.util.algorithm.support.MergeSort; Zbre5&aU
import org.rut.util.algorithm.support.QuickSort; %k?/pRv$>
import org.rut.util.algorithm.support.SelectionSort; y,rdyt
import org.rut.util.algorithm.support.ShellSort; LFi{Q{E)
_oa*E2VN
/** Yg5o!A
* @author treeroot Lbrn8,G\
* @since 2006-2-2 `Mg3P_}=
* @version 1.0 56kqG}mg&
*/ _\IA[-C+O
public class SortUtil { hunlKIg
public final static int INSERT = 1; !.#g
public final static int BUBBLE = 2; : i.5 <f
public final static int SELECTION = 3; sF :pwI5^
public final static int SHELL = 4; ;,]4A{|
public final static int QUICK = 5; ]Q.S Is
public final static int IMPROVED_QUICK = 6; POl-S<QV
public final static int MERGE = 7; 1jKj'7/K
public final static int IMPROVED_MERGE = 8; {I0!q"sF
public final static int HEAP = 9; .EWjeVq
G2n.NW#d4
public static void sort(int[] data) { :8bq0iqsV
sort(data, IMPROVED_QUICK); v0\M$@N[
} a 01s'9Be
private static String[] name={ o@ ^^;30
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ?r)>SB3(e
}; 6IK>v*<
5IzCQqOPgX
private static Sort[] impl=new Sort[]{ @JdeOL;
new InsertSort(), mV"F<G; H
new BubbleSort(), [-W~o.`
new SelectionSort(), s H'FqV,)
new ShellSort(), IAb.Z+ig
new QuickSort(), ]o'dr r
new ImprovedQuickSort(), *h?}~!AjY
new MergeSort(), =kq<J-:#R
new ImprovedMergeSort(), }YC=q
new HeapSort() %(%EEt
}; \(^]R,~*!b
{9P(U\]e]k
public static String toString(int algorithm){ &,Rye Q
return name[algorithm-1]; LoJEchRK
} 7r(c@4yPI
eUu<q/FUMj
public static void sort(int[] data, int algorithm) { F!I9)PSj
impl[algorithm-1].sort(data); ) .V,zmI
} +Swl$ab
Om7 '_}
public static interface Sort { 4},Y0QXw
public void sort(int[] data); meap;p
} BdvpG
A2PeI"y
public static void swap(int[] data, int i, int j) { ei]Q<vT6
int temp = data; +-V4:@
data = data[j]; i(# Fjp
data[j] = temp; E.*wNah"U
} *r~6R
} WwKpZ67$R