[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; _<1uO=km6
} M/mUY
int i1=l; f6Io|CZWJ
int i2=mid+1; !{L`Zd;C>w
for(int cur=l;cur<=r;cur++){ zg83->[
if(i1==mid+1) , *A',
data[cur]=temp[i2++]; ?Em*yc@WD
else if(i2>r) ?4i:$.A Y
data[cur]=temp[i1++]; RxVf:h'l
else if(temp[i1] data[cur]=temp[i1++]; O[[#\BL
else PME ?{%&
data[cur]=temp[i2++]; +aWI"d--h
} uM9[
} RuHMD"
Q}MS $[y
} 4(f4 4' ^
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改进后的归并排序: G.} 3hd0
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package org.rut.util.algorithm.support; ~"+Fp&[9f
e)~7pXYV)
import org.rut.util.algorithm.SortUtil; .iB?:
)MKzAAt~
/** IP`;hC
* @author treeroot 6NV- &0 _
* @since 2006-2-2 5Q.bwl:
* @version 1.0 Q4_+3-g<7L
*/ G2%%$7Jj
public class ImprovedMergeSort implements SortUtil.Sort { +Zx+DW cq
0vs9# <&V
private static final int THRESHOLD = 10; 8S>T1st
T/"6iv\1
/* >y&4gm
* (non-Javadoc) 1X4v:rI
* tIgKnKr^)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) rlvo&(a
*/ byYdX'd.
public void sort(int[] data) { _-*Lj;^V
int[] temp=new int[data.length]; `um#}ify#
mergeSort(data,temp,0,data.length-1); JU7EC~7|2c
} i51~/ R
cPxA R]'U
private void mergeSort(int[] data, int[] temp, int l, int r) { 'Pudy\Ab
int i, j, k; 9d4PH
int mid = (l + r) / 2; lK%pxqx
if (l == r) A-O@e e
return; b]s*z<|%
if ((mid - l) >= THRESHOLD) kmM1)- v
mergeSort(data, temp, l, mid); :J-@+_J
else d*=P8QwL|
insertSort(data, l, mid - l + 1); LXaT_3;
if ((r - mid) > THRESHOLD) q"5iza__H
mergeSort(data, temp, mid + 1, r); [0D( PV(n
else Us'm9 J
insertSort(data, mid + 1, r - mid); #J]u3*Tn|
}+0{opY4R
for (i = l; i <= mid; i++) { SUXRWFl
temp = data; udDhJ?
} wAxXK94#3
for (j = 1; j <= r - mid; j++) { ;}{%|UAsx
temp[r - j + 1] = data[j + mid]; ^c}Z$V
} ^ad p<?q4
int a = temp[l]; -$L53i&R
int b = temp[r]; G}CzeLw
for (i = l, j = r, k = l; k <= r; k++) { ja}_u}:
if (a < b) { [Z|R-{"
data[k] = temp[i++]; s)#FqB8
a = temp; 0b9K/a%sQv
} else { bE.,)GY
data[k] = temp[j--]; y~An'+yBa
b = temp[j]; ;wIpche
} @ 9D, f
} \5 IB/*
} 1+RG@Cp
2e zQX2q
/** *VH!<k[n
* @param data yf+M
* @param l ^4_)a0Kcm,
* @param i g4(B=G\j
*/ 9S@PY_ms
private void insertSort(int[] data, int start, int len) { f8kPbpV,
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); -`gqA%#+
} BB5(=n+
} -l<b|`s=w.
} Y;d$x}dh
} 7A?~a_Ep
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堆排序： ~~k_A|&
MZ o\1tU-i
package org.rut.util.algorithm.support; RUUV"y
ciVN-;vi
import org.rut.util.algorithm.SortUtil; .5'M^
N|5J-fR&
/** AJt*48H*G
* @author treeroot ED&>~~k)
* @since 2006-2-2 -jdS8n4
* @version 1.0 VVO C-:
*/ Y%y=
public class HeapSort implements SortUtil.Sort{ ;75K:_
/"?yB$s
/* (non-Javadoc) #qY`xH'>
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) >%5Ld`c:SD
*/ .6aC2A]es
public void sort(int[] data) { L,c@Z@
MaxHeap h=new MaxHeap(); V/"UDof
h.init(data); F8mS5oB|^
for(int i=0;i h.remove(); Jt5\
System.arraycopy(h.queue,1,data,0,data.length); ~``oKiPg@
} NovF?kh2
TELN4*
private static class MaxHeap{ chk1tFV
o0nd]"q?
void init(int[] data){ ewHk (ru
this.queue=new int[data.length+1]; 5e=9~].7
for(int i=0;i queue[++size]=data; N\{Xhr7d
fixUp(size); Q`-JRY-
} y(/"DUx
} tb36c<U-
mh&wvT<:{
private int size=0; __N< B5E
2GeJ\1k
private int[] queue; vpnQs#8O
T40&a(hXQ
public int get() { +l'l*<
return queue[1]; F6XrJ?JM
} &[71~.Od
SR)jJ=R3
public void remove() { cW%QKdTQY0
SortUtil.swap(queue,1,size--); &%eWCe++
fixDown(1); w]<V~X
} LF6PKS
file://fixdown IBfLb(I
private void fixDown(int k) { %-9?rOr
int j; b,C2(?hg
while ((j = k << 1) <= size) { 4-j3&(
if (j < size %26amp;%26amp; queue[j] j++; T($d3Nn1
if (queue[k]>queue[j]) file://不用交换 l$[7pM[
break; 1f}YKT
SortUtil.swap(queue,j,k); ky4;7RK
k = j; *Wbs{>&No
} CG#lpAs
} xA7>";sla[
private void fixUp(int k) { 8Dy5g
while (k > 1) { ws/e~ T<c
int j = k >> 1; 6chcpP0
if (queue[j]>queue[k]) .4CCR[Het
break; L i g7Ac,
SortUtil.swap(queue,j,k); ,5*Z<[*
k = j; ?Z^?A^; }$
} *sJT\J$D[
} `GDWy^-Q+!
hw5NHZ I'
} R!)3{cjU@
_BFDsQ
} !l6Ez_'
'@0Z#A
SortUtil： lwSZpS
[,bra8f[C
package org.rut.util.algorithm; gPE`mE
s7d4)A%
import org.rut.util.algorithm.support.BubbleSort; !V^wq]D2
import org.rut.util.algorithm.support.HeapSort; )k^y<lC2a
import org.rut.util.algorithm.support.ImprovedMergeSort; ?td`*n~,
import org.rut.util.algorithm.support.ImprovedQuickSort; WWEZTFL:j
import org.rut.util.algorithm.support.InsertSort; G+~f
import org.rut.util.algorithm.support.MergeSort; $./&GOus
import org.rut.util.algorithm.support.QuickSort; \V(w=
import org.rut.util.algorithm.support.SelectionSort; 8@ZZ[9kt
import org.rut.util.algorithm.support.ShellSort; u~xfI[8C
H8x66}
/** _|Uv7>}J^
* @author treeroot `VrQ?s
* @since 2006-2-2 c4f3Dr'xw
* @version 1.0 H/2dVUU
*/ 5i@WBa
public class SortUtil { 1j*E/L
public final static int INSERT = 1; a$=He
public final static int BUBBLE = 2; >~;= j~
public final static int SELECTION = 3; <dGph
public final static int SHELL = 4; aizJ&7(>
public final static int QUICK = 5; aGAeRF
public final static int IMPROVED_QUICK = 6; `N}aV Ns
public final static int MERGE = 7; ~@\sN+VS
public final static int IMPROVED_MERGE = 8; } *jmWP
public final static int HEAP = 9; I=pFGU
*!.anbo@?z
public static void sort(int[] data) { NmA6L+
sort(data, IMPROVED_QUICK); #F=!g?
} *{("T
private static String[] name={ msVi3`q~
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" DJZ$M
}; 7O-fc1OTv
/E-sg, k
private static Sort[] impl=new Sort[]{ @R_ON"h
new InsertSort(), 5uX-onP\[
new BubbleSort(), r4M;]
new SelectionSort(), W)<t7q+
new ShellSort(), 4-?zW
new QuickSort(), TT oW>RP#
new ImprovedQuickSort(), IuY4R0Go
new MergeSort(), v?YxF}
new ImprovedMergeSort(), h])oo:u'/Q
new HeapSort() d2?#&d'aq
}; ,u=+%6b)A
Kk).KgR
public static String toString(int algorithm){ L6"V=^Bq
return name[algorithm-1]; P Ij
} g`w46X
dJe 3DW :
public static void sort(int[] data, int algorithm) { #||D,[ _=+
impl[algorithm-1].sort(data); H*P[tyz$
} 2wJa:=$
Ae%AG@L
public static interface Sort { V`8\)FFG
public void sort(int[] data); cua( w
} q+} \(|
p=m:^9/
public static void swap(int[] data, int i, int j) { #-o 'g!
int temp = data; ~)VI`36X
data = data[j]; D/afa8>LQH
data[j] = temp; ];'7~",Y
} LLKYcy
} <I#M^}`