[JAVA]用Java实现的各种排序

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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; h5j<u
} TWtC-wI;
int i1=l; 3=IG#6)~C
int i2=mid+1; $%B5$+
for(int cur=l;cur<=r;cur++){ ,eDu$8J9
if(i1==mid+1) <H!O:Mf_p
data[cur]=temp[i2++]; ~bWhth2*
else if(i2>r) |"_)zQ
data[cur]=temp[i1++]; )t5;d
else if(temp[i1] data[cur]=temp[i1++]; >n(F4C-pl
else s~=g*99H
data[cur]=temp[i2++]; KLW&bJ$|j
} S3QaYq"v
} R#D#{cC(
Y!F!@`%G
} Q~8y4=|#CY
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改进后的归并排序: &eU3(F`.
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package org.rut.util.algorithm.support; {b[tA, >
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import org.rut.util.algorithm.SortUtil; L -YNz0A
L(;.n>/
/** vABXXB
* @author treeroot =Aj"j-r&{
* @since 2006-2-2 %oR>Uo
* @version 1.0 b1H7
*/ URLk9PI
public class ImprovedMergeSort implements SortUtil.Sort { =88t*dH(,"
3Mur*tj#
private static final int THRESHOLD = 10; ERp{gB2U?
(V8?,G>
/* %TDXF_.[
* (non-Javadoc) !n:uiwh
* ]b> pI;
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Qd?CTYNsv
*/ *l:&f_ngV
public void sort(int[] data) { a/:]"`)
int[] temp=new int[data.length]; L*9H#%3
mergeSort(data,temp,0,data.length-1); bK?MT]%}r
} tR5tPPw
K\~v&
private void mergeSort(int[] data, int[] temp, int l, int r) { q#jEv-j.
int i, j, k; /e .D/;]
int mid = (l + r) / 2; %/Bvy*X&
if (l == r) 0lBat_<8
return; ldYeX+J _
if ((mid - l) >= THRESHOLD) i2`#
mergeSort(data, temp, l, mid); }DbE4"^K7
else tq0;^L
insertSort(data, l, mid - l + 1); I=o'+>az
if ((r - mid) > THRESHOLD) jx'2N~$
mergeSort(data, temp, mid + 1, r); V'C-'Ythwf
else QE3ryD
insertSort(data, mid + 1, r - mid); HZ{n&iJ
,2ME2@OP
for (i = l; i <= mid; i++) { fy`+Efuj
temp = data; gd_^
} p0Z:Wkz]
for (j = 1; j <= r - mid; j++) { #>XeR>T
temp[r - j + 1] = data[j + mid]; ]{Z8
} %2}C'MqS
int a = temp[l]; EDtCNqBS~2
int b = temp[r]; viJJ e'\2
for (i = l, j = r, k = l; k <= r; k++) { KI`11lJW~
if (a < b) { h07eEg
data[k] = temp[i++]; /7x\;&bc
a = temp; HgaZbb>'
} else { W"|mpxp
data[k] = temp[j--]; 5a6VMqQ6
b = temp[j]; d+Ds9(gV
} dl_{iMhF&E
} =q5@,wN^
} Tt%}4{"
,z G(u 1
/** c_Tzyh7l4
* @param data Q-(Dk?z{
* @param l gJk[Ja
* @param i C38%H
*/ GkciA{
private void insertSort(int[] data, int start, int len) { 26 ?23J ;
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); P.h.MA]
} 6"+8M 3M l
} ^SAq^3^P!
} [IMQIX
} H]]c9`ayt
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堆排序： Y&g&n o_
LXNQb6!
package org.rut.util.algorithm.support; r:NH6tAL
!UcOl0"6
import org.rut.util.algorithm.SortUtil; ;_N"Fdl
7*;^UqGjz
/** nP;;MX:B
* @author treeroot Ye@t_,)x
* @since 2006-2-2 '?8Tx&}U8
* @version 1.0 `kPc!I7Y
*/ YZ**;"<G
public class HeapSort implements SortUtil.Sort{ $rB6<
1`QsW&9=b
/* (non-Javadoc) akCIa'>t
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) yd*3)6=
*/ 4.'JLArw
public void sort(int[] data) { c3#q0Ma
MaxHeap h=new MaxHeap(); W&KM/9d
h.init(data); *KJ7nRKx(w
for(int i=0;i h.remove(); 8gI\zgS
System.arraycopy(h.queue,1,data,0,data.length); SK-W%t
} ZF'HM@cfo
KuXkI;63J>
private static class MaxHeap{ \igaQ\~
Dft%ip2
void init(int[] data){ P#*n3&Uu
this.queue=new int[data.length+1]; DEtf(lW_
for(int i=0;i queue[++size]=data; "lrA%~3%[P
fixUp(size); w~LU\Ct
} M BVOfEMj
} )5GQJiY
+NR n0 z(
private int size=0; Y`^o7'Z2^P
O]ZC+]}/
private int[] queue; 0Cq!\nzz
d1bhJK
public int get() { 61|B]ei/
return queue[1]; mf2Mx=oy
} p:tN642
U|?,N0%Z1
public void remove() { kFwxK"n@C
SortUtil.swap(queue,1,size--); L[]BzsIv
fixDown(1); -_|]N/v\
} zo44^=~%
file://fixdown hVf^
private void fixDown(int k) { h[Mdr
int j; =fWdk\Wv
while ((j = k << 1) <= size) { vi|Zit
if (j < size %26amp;%26amp; queue[j] j++; |_nC6;
if (queue[k]>queue[j]) file://不用交换 +nQ!4
break; <T4(H[9B
SortUtil.swap(queue,j,k); a.,i.2
k = j; G=cNzr9
} OoM_q/oI
} <\ETPL,<
private void fixUp(int k) { 1Z 6SI>p
while (k > 1) { !g2a|g
int j = k >> 1; =UUd8,C/
if (queue[j]>queue[k]) 4By]vd<;=
break; @woC8X
SortUtil.swap(queue,j,k); h>W@U9
k = j; %)JRbX<c
} Nf5WQTa4
} q,@+^aZ
k>>`fE\K
} U`1l8'W}:#
F.0d4:A+
} Tq#<Po $
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SortUtil： =ybGb7?
ytz8=\p_b
package org.rut.util.algorithm; m}pL`:e!
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import org.rut.util.algorithm.support.BubbleSort; 3agNBF2
import org.rut.util.algorithm.support.HeapSort; i@6wO?Tv
import org.rut.util.algorithm.support.ImprovedMergeSort; <I1y
import org.rut.util.algorithm.support.ImprovedQuickSort; $',3Pv
import org.rut.util.algorithm.support.InsertSort; J#(,0h
import org.rut.util.algorithm.support.MergeSort; /{R3@,D[]
import org.rut.util.algorithm.support.QuickSort; ph#efY`a:
import org.rut.util.algorithm.support.SelectionSort; u<kD}
import org.rut.util.algorithm.support.ShellSort; {_7Hz,2U
gVA; `<
/** @>:i-5
* @author treeroot uS-3\$
* @since 2006-2-2 ^K.*.|
* @version 1.0 /x/4NeD
*/ bP03G=`6w
public class SortUtil { }9=2g`2Q
public final static int INSERT = 1; IXJ6PpQLv
public final static int BUBBLE = 2; 5%&]
public final static int SELECTION = 3; ! ]\2A.b[
public final static int SHELL = 4; (Y)!"_|
public final static int QUICK = 5; ~lk@6{`l|1
public final static int IMPROVED_QUICK = 6; ]9@X?q
public final static int MERGE = 7; B0"0_n7-
public final static int IMPROVED_MERGE = 8; 8 ?" Ze(
public final static int HEAP = 9; 0 {,h.:
~?-qZ<9/
public static void sort(int[] data) { ~$*`cO
sort(data, IMPROVED_QUICK); 6e/7'TYwT
} RF!'K ko
private static String[] name={ ZYDWv/u
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ]<+3Vw
}; e2bLkb3c
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private static Sort[] impl=new Sort[]{ (Xj.iP
new InsertSort(), >|(%2Zl
new BubbleSort(), z{' 6f@]
new SelectionSort(), '+6<U[ L
new ShellSort(), -nGwuEngP
new QuickSort(), itHM7d
new ImprovedQuickSort(), Q ]0r:i= .
new MergeSort(), 0+|>-b/%
new ImprovedMergeSort(), eK*W=c#@
new HeapSort() kXMP=j8
}; >fg4x+0%
tO`?{?W7
public static String toString(int algorithm){ T*R{L
return name[algorithm-1]; sxk*$jO[]
} uR^.
yYk|YX(7U
public static void sort(int[] data, int algorithm) { ;.AV;C"
impl[algorithm-1].sort(data); wsI5F&R,
} ?CFoe$M
zu C5@jy.x
public static interface Sort { Tm\OYYyk
public void sort(int[] data); "]UIz_^'`U
} MISE C[/
$NdH*
public static void swap(int[] data, int i, int j) { R|-j]Ne
int temp = data; V pH|R
data = data[j]; dxntGH< O
data[j] = temp; EZ `}*Yrd
} V $>"f(
} ([tG y