[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; WXRHG)nvL
} \5j22L9S
int i1=l; =<Zwv\U
int i2=mid+1; Oct\He\.
for(int cur=l;cur<=r;cur++){ }7f 1(#{7
if(i1==mid+1) mkKRC;
data[cur]=temp[i2++]; Q-H=wJ4R
else if(i2>r) gs^UR6 D,
data[cur]=temp[i1++]; 3ZT/>a>@
else if(temp[i1] data[cur]=temp[i1++]; #khyy-B=
else IIYX|;1}X
data[cur]=temp[i2++]; *m `KU+o-u
} vr8J*36{
} 4n`[SN
R|cFpRe
} Ae,2Xi
?eYchVq
改进后的归并排序: Q_UCF'f;}
z22|Kv;w
package org.rut.util.algorithm.support; -wG[>Y
ba8-XA_~U
import org.rut.util.algorithm.SortUtil; YGZAtSf3z
(STWAwK-
/** *$*nY [/5
* @author treeroot y.TdWnXx
* @since 2006-2-2 f%(e,KgW=
* @version 1.0 @et3}-c
*/ J$eZLj
public class ImprovedMergeSort implements SortUtil.Sort { D7n&9Z
0t/z"
private static final int THRESHOLD = 10; }]Z,\lA
4w3V!K8
/* iNaC ZC
* (non-Javadoc) ~-o^eI4_
* JOL Z2
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) k(w9vt0?
*/ s$3eJ|
public void sort(int[] data) { R`<{W(J;r
int[] temp=new int[data.length]; X/?h!Y}
mergeSort(data,temp,0,data.length-1); 6A{s%v H
} Vq;{+j(
!x!L&p
private void mergeSort(int[] data, int[] temp, int l, int r) { rg]A_(3Bb
int i, j, k; ^ZViQ$a"h;
int mid = (l + r) / 2; ZLFdnC@
if (l == r) 3YZ3fhpw
return; HS|g
if ((mid - l) >= THRESHOLD) 75BOiX
mergeSort(data, temp, l, mid); SieV%T0t1
else 9zM4D
insertSort(data, l, mid - l + 1); PrYWha=c-
if ((r - mid) > THRESHOLD) p%YvP
mergeSort(data, temp, mid + 1, r); ]|\>O5eeu
else ?28G6T]/?d
insertSort(data, mid + 1, r - mid); dpOL1rrE
L"zgBB?K6
for (i = l; i <= mid; i++) { 7n3x19T
temp = data; :_[cT,3
} l Ib>t
for (j = 1; j <= r - mid; j++) { nm%4L
temp[r - j + 1] = data[j + mid]; eVNBhR}HS
} k=q%FlE
int a = temp[l]; "8Wc\YDh
int b = temp[r]; _ZE$\5>-
for (i = l, j = r, k = l; k <= r; k++) { jwE(]u
if (a < b) { w<^2h}5
data[k] = temp[i++]; UOL%tT
a = temp; 3@WI*PMc
} else { 22(]x}`
data[k] = temp[j--]; #__'U6`(
b = temp[j]; |$*9j""u
} rgY?X$1q_
} ^Y*.Ktp,o
} *V<2\-
4O,a`:d1$6
/** g7q]Vj
* @param data >IydXmTy
* @param l ,%DAh
* @param i z&/ o
*/ s/'hLkxI
private void insertSort(int[] data, int start, int len) { O5n]4)<
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); l4.@YYzbp.
} \YF!< 2|[
} KKTfxNxJn
} q9Opa2
} 6!L*q
f$*9J
堆排序： U=1`. Ove
zpQ/E
package org.rut.util.algorithm.support; qk{UO <
dM;WG;8e
import org.rut.util.algorithm.SortUtil; Dve5m=
cO?"
/** L|Gk}n
* @author treeroot 1OwkLy,P
* @since 2006-2-2 >knR>96
* @version 1.0 hl~F1"q)
*/ 3 AF]en
public class HeapSort implements SortUtil.Sort{ ^i k|l=
ZpBH;{.,
/* (non-Javadoc) >~8Df61o`
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) <Q~7a hF
*/ 7I3CPc$
public void sort(int[] data) { Kt7x'5
MaxHeap h=new MaxHeap(); H/I`c>Zn
h.init(data); 3@bjIX`=H
for(int i=0;i h.remove(); Hjkgy%N
System.arraycopy(h.queue,1,data,0,data.length); r6_a%A*
} cCCplL
eBKIdR%k
private static class MaxHeap{ :QSW^x
oeKc-[r
void init(int[] data){ 6)YNjh.{*
this.queue=new int[data.length+1]; /Day5\Q#
for(int i=0;i queue[++size]=data; 6b)UoJxj
fixUp(size); -$ft `Ih
} E cz"O
} 3k0%H]wt
&fj?hYAj
private int size=0; o/ 5Fg>d
J8DbAB4X
private int[] queue; a][Z;g
c'qM$KN9G
public int get() { Ol0|)0
return queue[1]; aH"c0A
} ]}l!L;
@S92D6
public void remove() { :.Sc[UI0
SortUtil.swap(queue,1,size--); ,~iAoxD5jY
fixDown(1); Ee&$9 )t
} #|i{#~gxM
file://fixdown 'E,Yht=/}
private void fixDown(int k) { .).<L`q
int j; rI789q
while ((j = k << 1) <= size) { d2C:3-4
if (j < size %26amp;%26amp; queue[j] j++; rXX|?9'
if (queue[k]>queue[j]) file://不用交换 bm.H0rHR4
break; R<Tzt'z
SortUtil.swap(queue,j,k); _@TTVd
k = j; |i8dI)b
} Dw3! ibg
} uy{KV"%"^g
private void fixUp(int k) { VA.1JBQ
while (k > 1) { ?Sxnq#r#
int j = k >> 1; S8,06/#
if (queue[j]>queue[k]) K gX)fj
break; [_-K
SortUtil.swap(queue,j,k); 8msDJ{,X
k = j; k:xV[9ev:
} -y(V-
} ZZ5yu* &
p]oo^
} Y."[k&P-
Wg1WY}zG
} c`QsKwa
TW0^wSm
SortUtil： .Dmvgi]
Dn?L
package org.rut.util.algorithm; ! N p
K~>kruO";
import org.rut.util.algorithm.support.BubbleSort; H<yec"
import org.rut.util.algorithm.support.HeapSort; |T%/d#b~
import org.rut.util.algorithm.support.ImprovedMergeSort; H>]x<#uz)
import org.rut.util.algorithm.support.ImprovedQuickSort; /'(P{O>{j
import org.rut.util.algorithm.support.InsertSort; aRmS{X3
import org.rut.util.algorithm.support.MergeSort; Me>'QVr
import org.rut.util.algorithm.support.QuickSort; Zn//u<D
import org.rut.util.algorithm.support.SelectionSort; u4'Lm+&O
import org.rut.util.algorithm.support.ShellSort; ($TxVFNT
!l|Qyk[
/** /a_|oCeC}
* @author treeroot "$&F]0
* @since 2006-2-2 o6R(BMwGa
* @version 1.0 ES>3Cf
*/ N\?iU8w=
public class SortUtil { c#DTL/8"DO
public final static int INSERT = 1; Mx }(w\\T
public final static int BUBBLE = 2; &g`a [#
public final static int SELECTION = 3; JoYzC8/r
public final static int SHELL = 4; ".u?-xcbJ
public final static int QUICK = 5; :FSkXe2yy0
public final static int IMPROVED_QUICK = 6; Q7\Ax0
public final static int MERGE = 7; QbWD&8T0O
public final static int IMPROVED_MERGE = 8; `6A"eDa
public final static int HEAP = 9; PD?H5W3@
[I9d
public static void sort(int[] data) { QEPmuG
sort(data, IMPROVED_QUICK); weOMYJO;8
} yBoZ@9Do
private static String[] name={ P/Zo
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" -|lnJg4
}; k[p
Du/s
private static Sort[] impl=new Sort[]{ e.T5F`Du
new InsertSort(), wmIq{CXx,
new BubbleSort(), O6pjuhMx
new SelectionSort(), Q pX@;j
new ShellSort(), =pNkS1ey
new QuickSort(), `y\:3bQ4
new ImprovedQuickSort(), e:l 6;
new MergeSort(), wKYfqNCH
new ImprovedMergeSort(), nxt1Y04,H
new HeapSort() )mEF_ &
}; -zkB`~u_
{^qc`oF
public static String toString(int algorithm){ !qR(Rn
return name[algorithm-1]; rT#QA=YB
} !|!V}O
,LW0{(&z
public static void sort(int[] data, int algorithm) { MS b{ve_
impl[algorithm-1].sort(data); ";~#epPkX
} "FU|I1Xz
q8oEb
public static interface Sort { f,1rmX1
public void sort(int[] data); v<) }T5~r
} u4"+u"{d
!xvPG
public static void swap(int[] data, int i, int j) { exhF5,AW|K
int temp = data; [bp"U*!9P
data = data[j]; =4I361oMf
data[j] = temp; __9673y
} E'ZWSpP
} KpE#Ye&