[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; -Qb0:]sV#
} =/}X$,@2
int i1=l; 5@f5S0 Y
int i2=mid+1; &<0ZUI |S3
for(int cur=l;cur<=r;cur++){ T6HU*(
if(i1==mid+1) WcEt%mGQ,
data[cur]=temp[i2++]; Nfb`YU=
else if(i2>r) X-/Ban
data[cur]=temp[i1++]; qqvF-mDN
else if(temp[i1] data[cur]=temp[i1++]; A[JM4x
else ir&.Z5=
data[cur]=temp[i2++]; "DpKrVuG
} I$j|Rq
} J-XTN"O
zy>}L #
} .8H}Lf\
(0C&z/
改进后的归并排序: AC4 l<:Yh
x~+-VF3/
package org.rut.util.algorithm.support; mi^hvks<
S^j,f'2
import org.rut.util.algorithm.SortUtil; jQ$BPEG&X
zP nC=h|g
/** h(N=V|0
* @author treeroot %5Rq1$D
* @since 2006-2-2 M-Sv1ZLh
* @version 1.0 :Q-F9o J
*/ XU9'Rfp
public class ImprovedMergeSort implements SortUtil.Sort { &t3Jv{
w2zp#;d
private static final int THRESHOLD = 10; hW' HT
%\I.DEYH
/* hQ';{5IKvC
* (non-Javadoc) $E.XOpl&I
* SFpQ#
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ~:Mm<*lL%
*/ }N,>A-P
public void sort(int[] data) { e{!vNJ0`
int[] temp=new int[data.length]; H(> M
mergeSort(data,temp,0,data.length-1); (oYW]c}G,
} .@k*p>K
&t_h'JX&
private void mergeSort(int[] data, int[] temp, int l, int r) { /80YZ
int i, j, k; Z %EQt
int mid = (l + r) / 2; tlGWl0V?7Q
if (l == r) w~N-W8xNR
return; _]o5R7[MQ
if ((mid - l) >= THRESHOLD) rBfg*r`)
mergeSort(data, temp, l, mid); x+:zq<0|
else Kv?;cu!
insertSort(data, l, mid - l + 1); @a(oB.i
if ((r - mid) > THRESHOLD) 784;]wdy\
mergeSort(data, temp, mid + 1, r); RGp'b
else 2 ~-( A
insertSort(data, mid + 1, r - mid); eqhAus?)
o](.368+4
for (i = l; i <= mid; i++) { Euu ,mleM
temp = data; ~6d5zI4\
} Pux)>q] C
for (j = 1; j <= r - mid; j++) { I?M@5u
temp[r - j + 1] = data[j + mid]; q[c Etp28h
} d?7BxYaa
int a = temp[l]; V(..8}LlD
int b = temp[r]; E}$V2ha0zu
for (i = l, j = r, k = l; k <= r; k++) { Z,aGtJ.a'9
if (a < b) { %U?)?iZdL
data[k] = temp[i++]; oMc1:=EG
a = temp; 40.AM1Z0f
} else { hdg<bZk:
data[k] = temp[j--]; wd+O5Lr.R
b = temp[j]; .bfST.OA
} H,|YLKg-|
} 4z0L ke
} 2.qpt'p[
0N5bPb
/** !Uy>eji}
* @param data )!,@m>0v{
* @param l j38 6gL
* @param i yjpz_<7a=
*/ f_'"KF[%
private void insertSort(int[] data, int start, int len) { -tyaE
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); } 07r
} xwOE+
} 0b++17aV
} {US>)I
} dz,+tR~
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堆排序： OjATSmZ@@
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package org.rut.util.algorithm.support; <kbnu7?a*
q+%!<]7X
import org.rut.util.algorithm.SortUtil; UkfA}b^@v
b1)\Zi
/** v,0<9!'v
* @author treeroot 7d9Z/J@>
* @since 2006-2-2 f4 O]`U
* @version 1.0 6[+j'pW?
*/ PbN3;c3
public class HeapSort implements SortUtil.Sort{ {AgBwBCE
^A#x<J+
/* (non-Javadoc) !gJzg*{u@
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) T#r=<YH[C
*/ {(0Id!
public void sort(int[] data) { fTgbF{?xh
MaxHeap h=new MaxHeap(); }4KW@L[g
h.init(data); zbg+6qs})
for(int i=0;i h.remove(); Pz1G<eh#{g
System.arraycopy(h.queue,1,data,0,data.length); mu>] 9ZW
} UR,?!rJ^B
^U{P3%uZ
private static class MaxHeap{ ;@4sd%L8V
UN(3i(d
void init(int[] data){ A^L?_\e6
this.queue=new int[data.length+1]; uMpl#N p
for(int i=0;i queue[++size]=data; ay-9c2E
fixUp(size); >~wu3q
} -( Kh.h
} KBj@V6Q
y#e ?iE@
private int size=0; !ew6 n I
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private int[] queue; D6:DrA:
kQ[Jo%YT?E
public int get() { 2-7Z(7G{ F
return queue[1]; mtX31M4
} Gw`/.0
c_DaNEfaY
public void remove() { ^XNw$@&',
SortUtil.swap(queue,1,size--); Z9f/-|r5
fixDown(1); <M305BH
} B G5X_s0/
file://fixdown /+29.1#|
private void fixDown(int k) { ]CIe~q
int j; E4Zxv*
while ((j = k << 1) <= size) { )r#,ML
if (j < size %26amp;%26amp; queue[j] j++; hpas'H>J
if (queue[k]>queue[j]) file://不用交换 J@gm@ jLc
break; K4Y'B o4
SortUtil.swap(queue,j,k); PY\W
k = j; T+(M8qb
} (gDQ\t@3-
} ;t~*F#p(!
private void fixUp(int k) { [9J:bD
while (k > 1) { Lz?*B$h
int j = k >> 1; bw020@O*
if (queue[j]>queue[k]) 7?,7TR2Ny
break; Nuo^+z E
SortUtil.swap(queue,j,k); ~W3:xnBEk
k = j; ;/R kMS
} _hWuAJ9Qy
} yIWc\wv
7|{ B#
} -EVs@:3]j
y]7%$* <
} jQ)L pjS1
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SortUtil： +\srZ<67
3jXR"@Z-
package org.rut.util.algorithm; J ZA*{n2
R qnWtE
import org.rut.util.algorithm.support.BubbleSort; @]E]W#xAn
import org.rut.util.algorithm.support.HeapSort; {wHvE4F2
import org.rut.util.algorithm.support.ImprovedMergeSort; ^glX1 )
import org.rut.util.algorithm.support.ImprovedQuickSort; <8*A\&
import org.rut.util.algorithm.support.InsertSort; <5M_EJp
import org.rut.util.algorithm.support.MergeSort; Y}S.37|+^
import org.rut.util.algorithm.support.QuickSort; 3hH>U%`-
import org.rut.util.algorithm.support.SelectionSort; hcQSB00D^
import org.rut.util.algorithm.support.ShellSort; 9@Q&B+!
1*L^^%w
/** 3`xsK[
* @author treeroot jmSt?M0.xV
* @since 2006-2-2 z+ uL "PG[
* @version 1.0 }'PG!+=I
*/ ]W+)ee|D
public class SortUtil { 5`{=`
public final static int INSERT = 1; r1+c/;TpZ
public final static int BUBBLE = 2; 9uKOR7.zbo
public final static int SELECTION = 3; e~3]/BL
public final static int SHELL = 4; @`5QG2
public final static int QUICK = 5; KM5jl9Vv
public final static int IMPROVED_QUICK = 6; y2GQN:X
public final static int MERGE = 7; (X*'y*:
public final static int IMPROVED_MERGE = 8; R08&cd#$
public final static int HEAP = 9; p?}f|mQS)
z1kBNOr
public static void sort(int[] data) { g ,`F<CF9
sort(data, IMPROVED_QUICK); QjI#Cs}w
} 'y< t/qo
private static String[] name={ bBy'v/
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Ywmyr[Uh'
}; JaA&eT|
`(P "u
private static Sort[] impl=new Sort[]{ W8< @sq~I
new InsertSort(), &ycjSBK
new BubbleSort(), 0T(O'v}.
new SelectionSort(), E1#H{)G
new ShellSort(), K4_~ruhr
new QuickSort(), N`f!D>b:dn
new ImprovedQuickSort(), Rq"VB.ef&{
new MergeSort(), dJloH)uJZ>
new ImprovedMergeSort(), 04P.p6
new HeapSort() c^rC8E
}; *U:VM'a
GahaZ F
public static String toString(int algorithm){ oN_S}o
return name[algorithm-1]; #,t2*tM
} P`7ojXy
uijq@yo8-
public static void sort(int[] data, int algorithm) { /g13X,.H
impl[algorithm-1].sort(data); n'q aR<bY
} $I\))*a
d:A\<F
public static interface Sort { )uANmThOz
public void sort(int[] data); _MGNKA6JI
} D% oueW
n/xXQ7y
public static void swap(int[] data, int i, int j) { 0Wjd-rzc,
int temp = data; 4s[`yV
data = data[j]; eH ;Wfs2f
data[j] = temp; EV:_Kx8fP
} MKV=m8G=
} u9esdOv