[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; /odDJxJ k
} .bY R
int i1=l; `IV7\}I|
int i2=mid+1; j9xu21'!%
for(int cur=l;cur<=r;cur++){ )k.}>0K |
if(i1==mid+1) zd|n!3;
data[cur]=temp[i2++]; 5y8VA4L/o
else if(i2>r) %%FzBbWAO
data[cur]=temp[i1++]; D9h
else if(temp[i1] data[cur]=temp[i1++]; HT ."J
else Q@KCODi
data[cur]=temp[i2++]; we8aqEomr
} 7zq@T]
} Kv9Z.DY
fPPC`d&Q3
} ir|c<~_=
49.B!DqQW&
改进后的归并排序: %X|u({(zb
1]69S(
package org.rut.util.algorithm.support; Kf1NMin7
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import org.rut.util.algorithm.SortUtil; )M><09
7YFEyX10d
/** \{ve6`7Rn
* @author treeroot #MFIsx)r
* @since 2006-2-2 #/Bg5:
* @version 1.0 Bmt^*;WY+
*/ 6=:s3I^
public class ImprovedMergeSort implements SortUtil.Sort { `I.pwst8i-
@;\0cEn>
private static final int THRESHOLD = 10; Q_>W!)p Gz
R,ZG?/#uM9
/* nF B]#LLv
* (non-Javadoc) MXiQWg$
* h0$Y;=YA
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 6EeO\Qj{
*/ eG7Yyz+t$
public void sort(int[] data) { 9l(T>B2a
int[] temp=new int[data.length]; pX+4B=*
mergeSort(data,temp,0,data.length-1); dXfLN<nD>U
} F3hG8YX
m?kyAW'|
private void mergeSort(int[] data, int[] temp, int l, int r) { hd6O+i Y4
int i, j, k; ?lML+
int mid = (l + r) / 2; %&S9~E D
if (l == r) .,20_<j%=
return; #q4uS~
if ((mid - l) >= THRESHOLD) df!i}L
mergeSort(data, temp, l, mid); ^t:dcY7
else 2RQ-L
insertSort(data, l, mid - l + 1); PV:J>!]
if ((r - mid) > THRESHOLD) F$bV}>-1k
mergeSort(data, temp, mid + 1, r); 7[PEiAI
else A=3L_ #nO
insertSort(data, mid + 1, r - mid); :bm%f%gg
vA}_x7}n(
for (i = l; i <= mid; i++) { l0C`teO
temp = data; SL-;h#-y 4
} 0<O()NMv
for (j = 1; j <= r - mid; j++) { )2_[Ww|.
temp[r - j + 1] = data[j + mid]; -n8d#Qm)
} 9:P]{}
int a = temp[l]; wZs 2aa
int b = temp[r]; qV6WT&)T
for (i = l, j = r, k = l; k <= r; k++) { hJsP;y:@Lm
if (a < b) { UWidT+'Sa
data[k] = temp[i++]; J ZkQ/vp(
a = temp; YZ`SF"Bd(
} else { tj$[szo
data[k] = temp[j--]; s&Y"a,|Z
b = temp[j]; kg 8Dn
} BM'!odRv
} 2?SbkU/3|P
} 'NZ=DSGIy
+:"0%(
/** J>5rkR@/
* @param data GbclR:G
* @param l S'5Zy} +x
* @param i %IZd-N7i^
*/ uKXNzz
private void insertSort(int[] data, int start, int len) { nwh@F1|
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); - Z`RKR8C
} H>A6VDu
} JJM<ywPGp
} 2 rr=FJ
} [orL.D]
[iEz?1.,
堆排序： S>r",S
>=|p30\b
package org.rut.util.algorithm.support; 9 @xl{S-
z}B39L
import org.rut.util.algorithm.SortUtil; Mx$&{.LFJ
Xh>($ U
/** ?:ZB'G{%E
* @author treeroot }Uwji
* @since 2006-2-2 DL?nvH
* @version 1.0 P6R_W
*/ RFyMRE!?
public class HeapSort implements SortUtil.Sort{ y;uR@{
"X8jpg
/* (non-Javadoc) -X71JU
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) )+hV+rM jp
*/ Yu>DgMW
public void sort(int[] data) { {*AA]z?zo
MaxHeap h=new MaxHeap(); 7oWMjw\
h.init(data); XIbZ_G^ +D
for(int i=0;i h.remove(); -^lc-$0
System.arraycopy(h.queue,1,data,0,data.length); @(~:JP?KNC
} dWPQp*f2
`r-jWK\
private static class MaxHeap{ i*Ldec^
k%sH09
void init(int[] data){ 2h'Wu qO
this.queue=new int[data.length+1]; M{Z ;7n'
for(int i=0;i queue[++size]=data; m$kQbPlatN
fixUp(size); lOk8VlH<h
} 9MYk5q.X:
} =y4dR#R(\
b1KtSRLV
private int size=0; *Bq}.Yn
s:Ml\['x
private int[] queue; +7^p d9F.
1J4Pnl+hN
public int get() { -(8I?{"4i
return queue[1]; jk{(o09
} %)x9u$4W2
w{6C4~0
public void remove() { $Sgf jm
SortUtil.swap(queue,1,size--); akxNT_
fixDown(1); Y8\P"qb
} uv27Vos
file://fixdown YR9fw
private void fixDown(int k) { A913*O:\
int j; BzP,Tu{,
while ((j = k << 1) <= size) { 6t6Z&0$h~
if (j < size %26amp;%26amp; queue[j] j++; |4Q*4s
if (queue[k]>queue[j]) file://不用交换 9)ALJd,M
break; ds(?:zx#
SortUtil.swap(queue,j,k); ]~KLdgru_
k = j; _XV%}Xb'
} GWnIy6TH l
} jdP)y]c
private void fixUp(int k) { LdV&G/G-#D
while (k > 1) { S{rltT-
int j = k >> 1; iqQT ^
if (queue[j]>queue[k]) 8w&-O~M
break; UJ)pae
SortUtil.swap(queue,j,k); 2gPqB*H
k = j; d]pb1ECuu
} '7-Yo Q
} En?V\|,
//U1mDFT
} Nr4:Gih
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} ?;XEb\Kf
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SortUtil： kI^* '=:
<U@N^#
package org.rut.util.algorithm; [y[d7V9_o
,Of^xER`
import org.rut.util.algorithm.support.BubbleSort; O1J&Lwpk,
import org.rut.util.algorithm.support.HeapSort; q8v[u_(yD
import org.rut.util.algorithm.support.ImprovedMergeSort; -3EQRqVg
import org.rut.util.algorithm.support.ImprovedQuickSort; b-&iJ &>'
import org.rut.util.algorithm.support.InsertSort; (+> 2&@@<
import org.rut.util.algorithm.support.MergeSort; [1VA`:?W
import org.rut.util.algorithm.support.QuickSort; QPJ\Iu@D$
import org.rut.util.algorithm.support.SelectionSort; elOeXYO0
import org.rut.util.algorithm.support.ShellSort; {r,Uik-nL
wA=r]BT
/** ,#A(I#wL~
* @author treeroot Ymk?@mV4
* @since 2006-2-2 h:YD$XE
* @version 1.0 \k.`xG?
*/ ?Z7`TnG$uf
public class SortUtil { GM%+yS}(P
public final static int INSERT = 1; }02`ve*
public final static int BUBBLE = 2; jwDlz.sW!
public final static int SELECTION = 3; @ _Ey"k<
public final static int SHELL = 4; r]DiB:.
public final static int QUICK = 5; }TmOoi(X@
public final static int IMPROVED_QUICK = 6; FzT.9Vz7
public final static int MERGE = 7; U(#<D7}
public final static int IMPROVED_MERGE = 8; {ez$kz
public final static int HEAP = 9; `>gG"1,]
wA"@t
public static void sort(int[] data) { 'o>)E>
sort(data, IMPROVED_QUICK); K}~$h,n
} zX>W 8P
private static String[] name={ >lQo _p(;
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 1-KNXGb'
}; I`kfe`_
9DxHdpOk
private static Sort[] impl=new Sort[]{ `8:)? 0Ez
new InsertSort(), zfIo]M`
new BubbleSort(), yn4T!r "
new SelectionSort(), m[9.'@ye
new ShellSort(), : \+xXb{
new QuickSort(), >XD?zF)6
new ImprovedQuickSort(), ^SdF\uk{?6
new MergeSort(), T*z]<0E]
new ImprovedMergeSort(), Xwm3# o.&)
new HeapSort() _pvB$&
}; lvs XL
hi7_jl6
public static String toString(int algorithm){ ToXWFX
return name[algorithm-1]; `fu_){
} ;H_/o+
Dyov}y
public static void sort(int[] data, int algorithm) { )r2Y@+.FN
impl[algorithm-1].sort(data); ^X=Q{nB
} y+k_&ss
!#tVQ2O
public static interface Sort { &`"DG$N(
public void sort(int[] data); ')X(P>
} DXFu9RE\{
|3*9+4]a
public static void swap(int[] data, int i, int j) { sVLvnX,
int temp = data; 1K72}Gj)ZL
data = data[j]; '0<d9OlJ}
data[j] = temp; t&r.Kf9Z\
} zC?'Qiuh*
} @,vmX z