[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; Lc:DJA
} eX@7f!uz
int i1=l; @ dF]X
int i2=mid+1; /P3s.-sL
for(int cur=l;cur<=r;cur++){ 0{ ;[k
if(i1==mid+1) tuiQk=[c
data[cur]=temp[i2++]; $=-Q]ld&]
else if(i2>r) bG6<=^
data[cur]=temp[i1++]; >)IXc<"wq
else if(temp[i1] data[cur]=temp[i1++]; ;y{VdT
else J|BZ{T}d
data[cur]=temp[i2++]; @~l?hf
} FTg4i\Wp
} j{;RuNt
GqrOj++>
} |_P-
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改进后的归并排序: <?I s~[2
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package org.rut.util.algorithm.support; <XHS@|
*I(g~p
import org.rut.util.algorithm.SortUtil; f @cs<x
iWN-X (
/** l?/.uNw
* @author treeroot 0kD8wj%
* @since 2006-2-2 VnJ-nfA
* @version 1.0 yeCR{{B/'
*/ dLSnhZ
public class ImprovedMergeSort implements SortUtil.Sort { ;^,2 QsM
=!#iC?I
private static final int THRESHOLD = 10; ^!*?vHx:
_uO#0 )l
/* 47iwb
* (non-Javadoc) ikGH:{
* ~Lc>~!!t
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) x,Cc$C~YP
*/ y%H;o?<WX
public void sort(int[] data) { >t"]gQHtx
int[] temp=new int[data.length]; )6?.; B
mergeSort(data,temp,0,data.length-1); rI:KZ}GZ
} 3"gifE
hG,gY;&[6
private void mergeSort(int[] data, int[] temp, int l, int r) { ?CS jn
int i, j, k; :*M\z3`k
int mid = (l + r) / 2; wE75HE`gW
if (l == r) bH41#B
return; |zu>G9m
if ((mid - l) >= THRESHOLD) (%>Sln5hq
mergeSort(data, temp, l, mid); >:]fN61#
else yvxC/Jo4
insertSort(data, l, mid - l + 1); er5}=cFZ
if ((r - mid) > THRESHOLD) B-[SUmHr
mergeSort(data, temp, mid + 1, r); 'KGY;8<x]
else O#7ldF(
insertSort(data, mid + 1, r - mid); ]tZ5XS
8mA6l0
for (i = l; i <= mid; i++) { N,ik&NIWy
temp = data; H/V%DO
} P:k(=CzZ@J
for (j = 1; j <= r - mid; j++) { ~,e!t.339
temp[r - j + 1] = data[j + mid]; s/[i>`g/9
} i,")U)b
int a = temp[l]; p8"(z@T
int b = temp[r]; gE=~.P[ZX
for (i = l, j = r, k = l; k <= r; k++) { 16N8h]l
if (a < b) { ioi
data[k] = temp[i++]; ):78GVp
a = temp; w=e,gNO
} else { Xy*X4JJh^
data[k] = temp[j--]; `^J~^Z7Y-
b = temp[j]; 8 (^2
} 0h shHv-
} K=5_jE^e
} xdo{4XY^*W
)dL?B9d:
/** N2&aU?`e
* @param data Mty]LMK
* @param l -N\{QX1Yd
* @param i N~>?w#?J
*/ }2c}y7B,_
private void insertSort(int[] data, int start, int len) { 'fAD Dh}
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); RO.(k!J .
} .;KupQ;*
} !RcAJs'
} r3j8[&B"
} H9)uni
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堆排序： uBE,z>/,;
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package org.rut.util.algorithm.support; ESrWRO f9
.V.N^8(:a
import org.rut.util.algorithm.SortUtil; iz^wBQ
k(qQvn
/** |(P;2q4>
* @author treeroot mW-@-5Wda
* @since 2006-2-2 =hs@W)-O
* @version 1.0 `X^e}EGWu
*/ &vF"I'V
public class HeapSort implements SortUtil.Sort{ m~U{ V9;*
8S02 3
/* (non-Javadoc) .FXQ,7mZ-
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) P~qVr#eU
*/ |wb7`6g
public void sort(int[] data) { _uu:)%
MaxHeap h=new MaxHeap(); $Tur"_`I;
h.init(data); VDPN1+1*
for(int i=0;i h.remove(); *(scSC>
System.arraycopy(h.queue,1,data,0,data.length); \fKE~61
} =0)^![y]v
>ATW/9r
private static class MaxHeap{ {;}8Z$
>gSerDH8\
void init(int[] data){ W^N"y&
this.queue=new int[data.length+1]; $ B9=v
for(int i=0;i queue[++size]=data; @iRVY|t/
fixUp(size); g7P1]CZ}
} heKI<[8l
} 0/ Ht;(
E&+^H on
private int size=0; yn#h$o<
;9PM?Iy[
private int[] queue; $aA.d^
dvD<>{U,8
public int get() { .HBvs=i
return queue[1]; W =zG
} qj6`nbZ{va
=eqI]rVj^
public void remove() { '/H(,TM
SortUtil.swap(queue,1,size--); fI1;&{f
fixDown(1); `+.I
} QC4T=E]`j
file://fixdown iW?9oe
private void fixDown(int k) { [tzSr=,Cg
int j; re!8nuBsA
while ((j = k << 1) <= size) { V</T$V$
if (j < size %26amp;%26amp; queue[j] j++; pNlisS
if (queue[k]>queue[j]) file://不用交换 !_ Q!H2il
break; lAk1ncx
SortUtil.swap(queue,j,k); uB1!*S1f
k = j; k^pu1g=6I
} hzLGmWN2j8
} $t$f1?
private void fixUp(int k) { W6O.E
while (k > 1) { *?D2gaCta
int j = k >> 1; 5uo(z,WLR
if (queue[j]>queue[k]) ? ~Zrd
break; F?} *ovy
SortUtil.swap(queue,j,k); 8uxFXQ
k = j; ({KAh?
} DH9?2)aR
} LH#LBjOZk
" B{0-H+
} WWcm(q=
]zU<=b@
} #>jH[Q
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SortUtil： oRThJB
tgtoK|.
package org.rut.util.algorithm; -0SuREn
bM^A9BxD
import org.rut.util.algorithm.support.BubbleSort; !otq X-
import org.rut.util.algorithm.support.HeapSort; e K1m(E.=
import org.rut.util.algorithm.support.ImprovedMergeSort; 37-y
import org.rut.util.algorithm.support.ImprovedQuickSort; |D`b7h
import org.rut.util.algorithm.support.InsertSort; 4VJzs$
import org.rut.util.algorithm.support.MergeSort; Q(5:~**I
import org.rut.util.algorithm.support.QuickSort; bNjaCK<
import org.rut.util.algorithm.support.SelectionSort; @\`G & VB
import org.rut.util.algorithm.support.ShellSort; XjZao<?u
$v<hW A]>
/** &9dr+o-(~
* @author treeroot 06 Esc^D
* @since 2006-2-2 sQ:VrXwP
* @version 1.0 `J#xyDL6?
*/ O;BMwg_7
public class SortUtil { zg Y*|{4Sl
public final static int INSERT = 1; ;=VK_3"
public final static int BUBBLE = 2; 5;MK1l
public final static int SELECTION = 3; %r
public final static int SHELL = 4; Be>c)90bO_
public final static int QUICK = 5; mGpkM?Y"
public final static int IMPROVED_QUICK = 6; aQ&8fteFR
public final static int MERGE = 7; ok%a|Zz+]
public final static int IMPROVED_MERGE = 8; 2@m(XT (
public final static int HEAP = 9; g1 Wtu*K3
`-K)K<
public static void sort(int[] data) { ssX6kgq_(
sort(data, IMPROVED_QUICK); N 1f~K.e\
} z@l!\m-
private static String[] name={ ?^48Zq6wM
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" X:SzkkVl7
}; w[YkTv
Hu9-<upc&
private static Sort[] impl=new Sort[]{ {uwk[f{z
new InsertSort(), r6`^>c
new BubbleSort(), )_Xxk_
new SelectionSort(), 8~s-t
new ShellSort(), xL39>PB
new QuickSort(), M,_^hm7
new ImprovedQuickSort(), ^tg6JB;s
new MergeSort(), x)#<.DX
new ImprovedMergeSort(), ]IHD:!Z-=
new HeapSort() 34m']n
}; cfC;eRgq~
,LW(mdIe(
public static String toString(int algorithm){ wwK~H
return name[algorithm-1]; =JbdsYI(
} n$m]58w
Bgk~R.l
public static void sort(int[] data, int algorithm) { =Y]'5cn{
impl[algorithm-1].sort(data); rtYb"-&
} z%}CBTm
jsqUMy-
public static interface Sort { P$(WdVG
public void sort(int[] data); CFkW@\]
} zqvRkMWcM
,Y g5X
public static void swap(int[] data, int i, int j) { i^yH?bH @~
int temp = data; l?@MUsg+
data = data[j]; `b^#quz
data[j] = temp; - 5o<Q'(
} _>jrlIfc
} <@U.