[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; v,8Si'"i+
} fG3wc l~
int i1=l; PMQb\%iE"
int i2=mid+1; y>4p~
for(int cur=l;cur<=r;cur++){ 7WXiG0
if(i1==mid+1) $G)&J2zL
data[cur]=temp[i2++]; 75<el.'H
else if(i2>r) )Gmb?!/^
data[cur]=temp[i1++]; 5%'o%`?i
else if(temp[i1] data[cur]=temp[i1++]; Nz}|%.GP"
else $4sAnu]
data[cur]=temp[i2++]; 80dSQ"y
} tD865gi
} $f9 ,##/
<Nvlk\LQ
} W%=Zdm rv
% /~os2R
改进后的归并排序: d4Ixuux<3
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package org.rut.util.algorithm.support; ]!q }|bP
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import org.rut.util.algorithm.SortUtil; ~0av3G
BF>T*Z-Ki
/** g~eJ YS,
* @author treeroot %s]U@Ku(a
* @since 2006-2-2 r}Ltv?4
* @version 1.0 nMLU-C!t
*/ Sb^add0dT
public class ImprovedMergeSort implements SortUtil.Sort { `Yg7,{A\J
\MF3CK@/
private static final int THRESHOLD = 10; JATS6-Lz`
gh.w Li$+
/* Q=^ktKMeR
* (non-Javadoc) w 7Cne%J8
* >xklt"*U,
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) suzFcLxo
*/ ?56~yQF/2
public void sort(int[] data) { |C^ c0
int[] temp=new int[data.length]; ^tQPJ
mergeSort(data,temp,0,data.length-1); cPV5^9\T
} '9f6ZAnYpQ
A{G5Plrh
private void mergeSort(int[] data, int[] temp, int l, int r) { &~z+R="=
int i, j, k; tX+0 GLz
int mid = (l + r) / 2; V|+ `L-
if (l == r) F|DR
return; 4F}g(
if ((mid - l) >= THRESHOLD) -/@|2!d
mergeSort(data, temp, l, mid); MX"A@p~H
else %g!yccD9
insertSort(data, l, mid - l + 1); 9Ilfv
if ((r - mid) > THRESHOLD) =PI^X\if88
mergeSort(data, temp, mid + 1, r); Uf=vs(
else 3| GNi~
insertSort(data, mid + 1, r - mid); ,w,ENU0~f
^qE<yn
for (i = l; i <= mid; i++) { '#;,oX~5
temp = data; [Od>NO,n+]
} vx({N?
for (j = 1; j <= r - mid; j++) { d4b 9rtM
temp[r - j + 1] = data[j + mid]; Pn~pej5'K
} 8XLxT(YFIs
int a = temp[l]; Y:DNu9
int b = temp[r]; .CIbpV?T
for (i = l, j = r, k = l; k <= r; k++) { ORUWslMt
if (a < b) { F<6KaZ|
data[k] = temp[i++]; #|)JD@;Q
a = temp; t-3v1cv"
} else { yg]suU<z]
data[k] = temp[j--]; 53g8T+`\(
b = temp[j]; >xhd[
} dt`9RB$
} oG|?F4l*
} ykErt%k<n
E geG,/-`
/** @9n #vs
* @param data 0IoXDx
* @param l `I]1l MJ)o
* @param i w`H.ey
*/ [Q2S3szbt6
private void insertSort(int[] data, int start, int len) { 7j9D;_(.^$
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); o=mq$Z:}
} 0X] ekq
} T4%i`<i
} WZ-4^WM=!
} DDqC}l_
D#vn {^c8O
堆排序： tJ(c<:zD
wgSR*d>y*9
package org.rut.util.algorithm.support; -D.BJ(
]be0I)
import org.rut.util.algorithm.SortUtil; gJ)h9e*m^
'sT}DX(7M
/** MEdIw#P.}{
* @author treeroot \NvC
* @since 2006-2-2 ae9k[=-
* @version 1.0 #+2:d?t
*/ [[Jv)?jm
public class HeapSort implements SortUtil.Sort{ +X2 i/}
k1QpX@
/* (non-Javadoc) /xX,
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) a}[=_vb}K
*/ ;-Y]X(z>
public void sort(int[] data) { mh!N^[=n
MaxHeap h=new MaxHeap(); g:~?U*f-
h.init(data); ZNL;8sI?>
for(int i=0;i h.remove(); *@$($<pY&
System.arraycopy(h.queue,1,data,0,data.length); #z-iL!?
} V7KtbL#
]yj4~_&O
private static class MaxHeap{ #Tgz,e9
)7Hon
void init(int[] data){ } K+Q9<~u
this.queue=new int[data.length+1]; hJ$C%1;
for(int i=0;i queue[++size]=data; jm#F*F vL
fixUp(size); Q G=-LXv:@
} MA/"UV&M(
} VOowA^
!}Woo$#ND
private int size=0; Se;?j-
e"v[)b++Y
private int[] queue; 5'{qEZs^QU
*_"c!eW
public int get() { &kXGWp
return queue[1]; clR?< LO
} aOAwezfYR
5CRc]Q#@
public void remove() { &2<&X( )
SortUtil.swap(queue,1,size--); }Uqa8&
fixDown(1); WacU@L $A
} KL:6P-3
file://fixdown c4qp3B_w
private void fixDown(int k) { ^J#*n;OQ3A
int j; Ht=6P)
while ((j = k << 1) <= size) { m_r@t*
if (j < size %26amp;%26amp; queue[j] j++; x[.z"$T@
if (queue[k]>queue[j]) file://不用交换 r[UyI3(i^
break; +hyWo]nW0
SortUtil.swap(queue,j,k); ]"2 v7)e
k = j; E{+c*sz
} Z)6nu)
} ]U^d1&k
private void fixUp(int k) { \^;|S
while (k > 1) { gn[$;*932z
int j = k >> 1; n_xa)
if (queue[j]>queue[k]) SG+i\yu$h0
break; 2=!3[> B
SortUtil.swap(queue,j,k); 0c\|S>g[
k = j; !mErt2UJl
} ELkOrV~a{:
} qqz,~EhC
`1[Sv"
} ;f ;*Q>!
p.TiTFu/
} yTq(x4]
kj<D4)
SortUtil： g.`t!6Hc
wCC~tuTpr
package org.rut.util.algorithm; :)+@qxTy
)kY_"= d
import org.rut.util.algorithm.support.BubbleSort; oZ*=7u
import org.rut.util.algorithm.support.HeapSort; ffoo^1}1
import org.rut.util.algorithm.support.ImprovedMergeSort; 4MF}FS2)
import org.rut.util.algorithm.support.ImprovedQuickSort; b/n8UxA
import org.rut.util.algorithm.support.InsertSort; n[MIa]dK
import org.rut.util.algorithm.support.MergeSort; o,''f_tRQ|
import org.rut.util.algorithm.support.QuickSort; $jm>tW&;
import org.rut.util.algorithm.support.SelectionSort; u{{xnyl?
import org.rut.util.algorithm.support.ShellSort; =Zb"T5E
$E9daUt8"J
/** ad3z]dUZ9
* @author treeroot q$u\ q.
* @since 2006-2-2 Edn$0D68u_
* @version 1.0 0P%|)Ae
*/ bh;b` 5
public class SortUtil { xn x1`|1u
public final static int INSERT = 1; RwE*0 T
public final static int BUBBLE = 2; Cf1wM:K|8
public final static int SELECTION = 3; SFk11
public final static int SHELL = 4; 1UA~J|&gi^
public final static int QUICK = 5; /nD0hb
public final static int IMPROVED_QUICK = 6; M5ySs\O4
public final static int MERGE = 7; lA Ck$E
public final static int IMPROVED_MERGE = 8; !>kv.`|7~
public final static int HEAP = 9; Zh~Lm
zQ6 -2 A
public static void sort(int[] data) { +O!M>
sort(data, IMPROVED_QUICK); 7p>-oR"
} %6c*dy
private static String[] name={ W|-N>,G
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" )r6SGlE[Y
}; Mp=kZs/
p`l[cVQ<
private static Sort[] impl=new Sort[]{ VjB`~
new InsertSort(), D'sboOY
new BubbleSort(), Cp~3Jm3
new SelectionSort(), IIt^e#s&
new ShellSort(), 4M<JfD
new QuickSort(), m|cWX"#g
new ImprovedQuickSort(), b\|p
new MergeSort(), "/K&qj
new ImprovedMergeSort(), cT=wJ
new HeapSort() #NQz&4W
}; 6<Pg>Bg
+ x;ML
public static String toString(int algorithm){ gq:TUvX
return name[algorithm-1]; i>if93mpj
} a_iQlsU
xP/1@6]_Je
public static void sort(int[] data, int algorithm) { |`t!aG8
impl[algorithm-1].sort(data); C7 & 6rUX
} ^B6i6]Pd=9
\|>`z,;
public static interface Sort { +_XbHjhN/
public void sort(int[] data); V8U`%/`N
} u+tb83~[=
e'?doP
public static void swap(int[] data, int i, int j) { :mtw}H 'F8
int temp = data; t>h i$NX{p
data = data[j]; y[5P<:&s
data[j] = temp; Ccd7|L1
} vyx\N{
} -x%`Wv@L