[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; y 2cL2c$BT
} \/X{n*Hw?
int i1=l; s?~8O|Mu'
int i2=mid+1; t{[gKV-b
for(int cur=l;cur<=r;cur++){ #Ul4&QVeg
if(i1==mid+1) `Q+i-y
data[cur]=temp[i2++]; ;4R=eI
else if(i2>r) PGMv(}%;
data[cur]=temp[i1++]; Iy6p>z|
else if(temp[i1] data[cur]=temp[i1++]; lJ("6aT?
else p5D5%B/
data[cur]=temp[i2++]; 4*YOFU}l
} jaL$LJV
} EI%M Azj}
{rtM%%l
} .wM:YX'[G
y`\mQ48V
改进后的归并排序: tru;;.lj8K
CL EpB2_
package org.rut.util.algorithm.support; rO5u~"v]
<8g *O2
import org.rut.util.algorithm.SortUtil; (0X,Qwx
3"f)*w7d
/** DBLA% {05
* @author treeroot -MQZiq7H4
* @since 2006-2-2 -qs(2^
* @version 1.0 ?,D>+::
*/ Y1m}@k,+M
public class ImprovedMergeSort implements SortUtil.Sort { &S9f#Ui
3$MYS^D
private static final int THRESHOLD = 10; u'#`yTB6b
JTSq{NN
/* rsd2v9
* (non-Javadoc) M-}j9,oR`
* ',L{CQA?c
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) DxE^#=7iH;
*/ U)SM),bE[
public void sort(int[] data) { v; je<DT
int[] temp=new int[data.length]; v@F|O8t:s
mergeSort(data,temp,0,data.length-1); `wP/Zp{Hy
} 2]?w~qjWm
L*kh?PS;
private void mergeSort(int[] data, int[] temp, int l, int r) { ;"d?_{>7
int i, j, k; "$`wk
int mid = (l + r) / 2; KyuA5jQ7
if (l == r) ^zBjG/'7
return; iSSc5ek4
if ((mid - l) >= THRESHOLD) >cGh|_9
mergeSort(data, temp, l, mid); []GthF
else yS1b,cxz
insertSort(data, l, mid - l + 1); "3U{h]
if ((r - mid) > THRESHOLD) V%X:1 8j
mergeSort(data, temp, mid + 1, r); <^H1)=tlF
else r78u=r
insertSort(data, mid + 1, r - mid); 2P;%P]~H
v_?s1+w
for (i = l; i <= mid; i++) { ^8o_Iz)r,
temp = data; ZXFAuF
} c n\k`8
for (j = 1; j <= r - mid; j++) { t(Q&H!~e
temp[r - j + 1] = data[j + mid]; v>x {jZkFL
} ^yEj]]6
int a = temp[l]; aF;]7i@
int b = temp[r]; z5|e\Z
for (i = l, j = r, k = l; k <= r; k++) { 2eZk3_w
if (a < b) { 7yq7a[Ra
data[k] = temp[i++]; >N+bU{s
a = temp; 1YF+(fk
} else { VJ~X#Q
data[k] = temp[j--]; t 1Ir4
b = temp[j]; %a)0?U
} ::3iXk)
} Dz"u8 f
} EI?d(K
)[@YHE5g
/** wW6mYgPN%
* @param data |.Y@^z;P3
* @param l pmow[e
* @param i (<d&BV-"
*/ =!pu+&I 9
private void insertSort(int[] data, int start, int len) { cu.*4zs
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); EPE!V>
} v&[X&Hu[
} .-O@UQx.I
} X]&;8
} hJC p0F9O
w(vE2Y ?
堆排序： K$37}S5
%-1BA*J`|
package org.rut.util.algorithm.support; tdw\Di#m
hX>VVeIZ
import org.rut.util.algorithm.SortUtil; 4."o.:8x
KG4#BY&^
/** #x4h_K Y
* @author treeroot oPBg+Bh*
* @since 2006-2-2 dIBKE0`
* @version 1.0 !BvTJ-e)F
*/ QKUBh-QFK
public class HeapSort implements SortUtil.Sort{ @^y?Bh9jQ
9QX~aX
/* (non-Javadoc) 'Ec:l(2Ec
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) HX /GLnY/X
*/ 'o)ve(
public void sort(int[] data) { Y?&DEKFbD
MaxHeap h=new MaxHeap(); $$bTd3N+
h.init(data); 1a=9z'8V
for(int i=0;i h.remove(); Z3abem<Q
System.arraycopy(h.queue,1,data,0,data.length); YjX!q]56
} [d^:
xtIehr0{$I
private static class MaxHeap{ c`$`0}
#2lvfR|
void init(int[] data){ T$.-{I
this.queue=new int[data.length+1]; zT4ulXN
for(int i=0;i queue[++size]=data; /BjGAa(
fixUp(size); NrI5uC7
} C<wj?!v,F[
} },Y; (n'
FVC2XxP
private int size=0; Tk v
v]`A_)[
private int[] queue; |peMr#
#<tWYE
public int get() { 3w<j:\i
return queue[1]; ,SJK
} '4^V4i
_;J9q}X
public void remove() { lM|WOmD
SortUtil.swap(queue,1,size--); AHMV@o`V
fixDown(1); CtC`:!Q
} f5=t*9_-[
file://fixdown "{ry 9?z
private void fixDown(int k) { ,@'){V
int j; &x0TnW"g
while ((j = k << 1) <= size) { ![P(B0Ct/
if (j < size %26amp;%26amp; queue[j] j++; _iboTcUF
if (queue[k]>queue[j]) file://不用交换 <zDw&s2
break; z?t(+^
SortUtil.swap(queue,j,k); ,5A>:2 zs
k = j; ^;k _
} Y="&|c=w#L
} -o!,,XYj .
private void fixUp(int k) { U38wGSG
while (k > 1) { 9+is?Pj
int j = k >> 1; >NOYa3
if (queue[j]>queue[k]) Er/5 ,
break; ^/d^$
SortUtil.swap(queue,j,k); i!d7,>l+Q~
k = j; z$BnEd.y=:
} v20I<!5w
} ^; V>}08
WtdkA Sj
} :5cu,&<Gv
_!^FW%
} 'G3OZj8
,@>rubUz
SortUtil： 0rm;)[SjF
b%!`fn-;
package org.rut.util.algorithm; Tx!m6B`Y
<<2b2?aS`
import org.rut.util.algorithm.support.BubbleSort; P7x?!71?L
import org.rut.util.algorithm.support.HeapSort; 9;v"bcQ
import org.rut.util.algorithm.support.ImprovedMergeSort; nog\,NT
import org.rut.util.algorithm.support.ImprovedQuickSort; '3u]-GU2_
import org.rut.util.algorithm.support.InsertSort; hTtp-e`
import org.rut.util.algorithm.support.MergeSort; ZesD(
import org.rut.util.algorithm.support.QuickSort; *ckrn>E{h
import org.rut.util.algorithm.support.SelectionSort; @xF8' [<
import org.rut.util.algorithm.support.ShellSort; 5WNg+
zHs
/** 3D09P5$W
* @author treeroot h'y@M+c(
* @since 2006-2-2 qQ DFg`
* @version 1.0 TnU$L3k
*/ 7}1Kafs
public class SortUtil { e"adkV
public final static int INSERT = 1; e$^!~+J7
public final static int BUBBLE = 2; /GSI.tO
public final static int SELECTION = 3; 9]F&Fz/G
public final static int SHELL = 4; <:{[Zvl'k
public final static int QUICK = 5; ^57fHlw
public final static int IMPROVED_QUICK = 6; c+)|o!d
public final static int MERGE = 7; lPN< rgg
public final static int IMPROVED_MERGE = 8; :*Ggz|
public final static int HEAP = 9; 8`~3MsE"
o>A%}YU
public static void sort(int[] data) { \HQb#f,
sort(data, IMPROVED_QUICK); *,[=}v1
} U}wq~fD
private static String[] name={ YTPmS\ H _
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" x[>_I1TJ
}; 75}u D
?.A/E?Oc
private static Sort[] impl=new Sort[]{ GK+\-U)v
new InsertSort(), *4^]?Y\*
new BubbleSort(), e(\S,@VN2
new SelectionSort(), i|^`gly
new ShellSort(), f>+}U;)EF
new QuickSort(), FuiW\=^
new ImprovedQuickSort(), JHZo:Ad -&
new MergeSort(), q vVZA*
new ImprovedMergeSort(), h-rj
new HeapSort() -*q2Y^A^l
}; ;F(01
WblV`"~e
public static String toString(int algorithm){ 8oH54bFp
return name[algorithm-1]; ZznWs+
} RH4n0=2
Q0; gF?
public static void sort(int[] data, int algorithm) { [k=9 +0p
impl[algorithm-1].sort(data); (dipKs?K
} 446hrzW>@
nW%=k!''
public static interface Sort { aw"%B-N\
public void sort(int[] data); }3_G|
} W!B4<'Fjc
?HyioLO
public static void swap(int[] data, int i, int j) { d1La7|43u
int temp = data; [=1?CD
data = data[j]; ZL@DD(S-/
data[j] = temp; &&S4x
} *K.7Zf0
} CgKSK0/a