[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; ??g`c=R!V
} Vt;!FZ
int i1=l; D@ R>gqb
int i2=mid+1; 8Z1pQx-P2C
for(int cur=l;cur<=r;cur++){ Kulh:d:w
if(i1==mid+1) HyX:4f|]'
data[cur]=temp[i2++]; rZSX fgfr
else if(i2>r) _6/q.
data[cur]=temp[i1++]; Lr;PESV
else if(temp[i1] data[cur]=temp[i1++]; lMW4SRk1C
else yw{;Qm2\7
data[cur]=temp[i2++]; C?h`i ^ >2
} pQ/ bIuq
} #nS[]UbwZ
0*umf.R
} 1}>uY
& ~*qTojj
改进后的归并排序: Btu=MUS
d%C:%d
package org.rut.util.algorithm.support; Ad'b{C%
SPEDN}/^
import org.rut.util.algorithm.SortUtil; [ta3sEPjs
@ApX43U(
/** d(>
* @author treeroot )?qH#>mD6
* @since 2006-2-2 tMQz'3,X
* @version 1.0 Qk_`IlSd
*/ I[$SVPe#
public class ImprovedMergeSort implements SortUtil.Sort { 9YjO
e|&}{JP{[
private static final int THRESHOLD = 10; #Emz9qTsce
SGUu\yS&s
/* LnY`f -H
* (non-Javadoc) [Dou%\
* )VoQ/ch<
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) <6L=% \X{*
*/ 1;$8=j2
public void sort(int[] data) { qZ79IX'y
int[] temp=new int[data.length]; F')fi0=
mergeSort(data,temp,0,data.length-1); sM0o,l(5
} oPVyLD
`x'vF#
private void mergeSort(int[] data, int[] temp, int l, int r) { eo~>|0A*V
int i, j, k; v*UJ4r
int mid = (l + r) / 2; LsGu-Y5^
if (l == r) SF#Rc>v
return; >QJfTkD$
if ((mid - l) >= THRESHOLD) 28rC>*+z
mergeSort(data, temp, l, mid); |DZ3=eWZ
else .o!z:[IPY
insertSort(data, l, mid - l + 1); FA#?+kd
if ((r - mid) > THRESHOLD) ! !9l@
mergeSort(data, temp, mid + 1, r); V`;$Ua;y
else MlBw=Nr
insertSort(data, mid + 1, r - mid); !`VC4o
rt5eN:'qY
for (i = l; i <= mid; i++) { wWU5]v
temp = data; o"5[~$O
} oF9c>^s
for (j = 1; j <= r - mid; j++) { C"=^(HU
temp[r - j + 1] = data[j + mid]; HvSYE[Zt|
} Edi`x5"l
int a = temp[l]; }[%d=NY
int b = temp[r]; 4EB&Zmg[K
for (i = l, j = r, k = l; k <= r; k++) { :Ky *AI
if (a < b) { 7:>VH>?D
data[k] = temp[i++]; -Ze{d$
a = temp; RaNz)]+7`
} else { O*d4zBT
data[k] = temp[j--]; NX5A{
b = temp[j]; d|, B* N(w
} ~.,h12
} rW&#Xw/a
} ZO!
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/** B,Gt6cUq
* @param data *~0Ko{Avc
* @param l ]XAJ|[]sj*
* @param i %}*0l8y
*/ p>c`GDU
private void insertSort(int[] data, int start, int len) { 8!c#XMHV
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); W6>SYa
} .;'3Roi
} ;C+g)BW
} nHB=*Mj DV
} qK9\oB%s7
~^GY(J'
堆排序： ?(!<m'jEy
@^)aUOe
package org.rut.util.algorithm.support; xa?#wY b
.PhH|jrCW^
import org.rut.util.algorithm.SortUtil; q:9#Vcw
^ld?v
/** [v!TQwMU
* @author treeroot u VZouw#
* @since 2006-2-2 Rt{`v<
* @version 1.0 W?B(Jsv
*/ BIr24N
public class HeapSort implements SortUtil.Sort{ / hl:p
=`l).GnN2`
/* (non-Javadoc) {_]'EK/w
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 5"]t{-PD
*/ >,JA=s
public void sort(int[] data) { y+PiH
MaxHeap h=new MaxHeap(); -a}d @&
h.init(data); UW%.G
for(int i=0;i h.remove(); gtBnP~zT\B
System.arraycopy(h.queue,1,data,0,data.length); 8] BOq:
} 71h?t`N
N{(Q,+ ~
private static class MaxHeap{ f~3_Rv!
CX8tTbuFl
void init(int[] data){ ~ }<!ON;
this.queue=new int[data.length+1]; ^.d97rSm
for(int i=0;i queue[++size]=data; nsCat($)
fixUp(size); ;BR`}~m
} r.V< 5xV
} $:bU<
SgOn:xg;3L
private int size=0; o~*5FN}%+l
'Si1r%'m#
private int[] queue; :.+?v*%;n
aFj)s?$4]K
public int get() { BK_x5mGu3
return queue[1]; #jja#PF]7
} O-M4NKl]6
\(C_t1
public void remove() { Uv-xP(X
SortUtil.swap(queue,1,size--); r`THOj\cM
fixDown(1); K`9ph"(Z
} oM@X)6P_
file://fixdown Nz,8NM]
private void fixDown(int k) { "o*zZ;>^
int j; ?}N@bsl08w
while ((j = k << 1) <= size) { l1RpG"
if (j < size %26amp;%26amp; queue[j] j++; r`Qzn" H
if (queue[k]>queue[j]) file://不用交换 `z=I}6){
break; ml|[xM8
SortUtil.swap(queue,j,k); AU@XpaPWh
k = j; 2#n4t2p
} K,>D%mJ
} ?5%|YsJP_
private void fixUp(int k) { _%)v9}D
while (k > 1) { %#.HFK
int j = k >> 1; 4DL;/Z:
if (queue[j]>queue[k]) T4\F=iw4
break; ^XV=(k;~bX
SortUtil.swap(queue,j,k); 1|L3} 2
k = j; 1,p[4k~Ww
} S >PTD@
} Lmy ^/P%
ugM,wT&~Y
} H-Uy~Ry*T
WH.5vrY Z
} M~/%V NX
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SortUtil： }Om+,!_d
TB]Bl.
package org.rut.util.algorithm; r$~w3yN)v
oJF@O:A
import org.rut.util.algorithm.support.BubbleSort; {e4ILdXM
import org.rut.util.algorithm.support.HeapSort; MSmvQ
import org.rut.util.algorithm.support.ImprovedMergeSort; n')#]g0[
import org.rut.util.algorithm.support.ImprovedQuickSort; `hD\u@5Tw
import org.rut.util.algorithm.support.InsertSort; 2VOdI
import org.rut.util.algorithm.support.MergeSort; (9N75uCa
import org.rut.util.algorithm.support.QuickSort; wn'_;0fg
import org.rut.util.algorithm.support.SelectionSort; }ug|&25D
import org.rut.util.algorithm.support.ShellSort; {YCquoF
EHT5Gf
/** <}c`jN!z.
* @author treeroot <y(uu(c
* @since 2006-2-2 Fejs9'cB
* @version 1.0 X*2MNx^K~
*/ silTL_$
public class SortUtil { xGQ958@
public final static int INSERT = 1; eCYgi7?
public final static int BUBBLE = 2; 9w -t9X>X
public final static int SELECTION = 3; :@TfhQV_=Q
public final static int SHELL = 4; x}G["ZU}v]
public final static int QUICK = 5; &)Fp
public final static int IMPROVED_QUICK = 6; Oj#nF@U
public final static int MERGE = 7; xzFV]
public final static int IMPROVED_MERGE = 8; a.a5qwG
public final static int HEAP = 9; ~M 6^%
Q"UQv<
public static void sort(int[] data) { c~0YIk>]
sort(data, IMPROVED_QUICK); :^DuB_
} ellj/u61bj
private static String[] name={ iPMI$
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" T jO}P\p
}; s4 o-*1R*`
bJD2c\qoc
private static Sort[] impl=new Sort[]{ TxYxB1C)
new InsertSort(), VJMn5v[V
new BubbleSort(), EPCu
new SelectionSort(), bQlShVJL
new ShellSort(), JVAJLq
new QuickSort(), (]Z%&>*
new ImprovedQuickSort(), `z$<1QT
new MergeSort(), J9^RP~>bs
new ImprovedMergeSort(), )1a3W7
new HeapSort() Oo<^~d2=
}; r"OVu~ND
*yqEl O
public static String toString(int algorithm){ [X.sCl|
return name[algorithm-1]; DfFsCTu
} &eQF[8 ,
B Mh949;
public static void sort(int[] data, int algorithm) { uhUC m
impl[algorithm-1].sort(data); lHwQ'/r
} e,qc7BJzK
@ oE [!
public static interface Sort { 9l?#ZuGXp
public void sort(int[] data); O $uXQ.r
} ^$aj,*Aj~
. gK*Jpmx
public static void swap(int[] data, int i, int j) { s@C@q(i6
int temp = data; i,BE]w
data = data[j]; Z 4uft
data[j] = temp; 4r!8_$fN?G
} w%Tcx^:
} Wyf+xr'Ky