[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; $a`J(I
} 17e=GL
int i1=l; Na\3.:]z
int i2=mid+1; Oamv9RyDvC
for(int cur=l;cur<=r;cur++){ 4 hL`=[AB
if(i1==mid+1) zt7_r`#z
data[cur]=temp[i2++]; hNH.G(l0
else if(i2>r) x7vq?fP0n
data[cur]=temp[i1++]; XxmJP5
else if(temp[i1] data[cur]=temp[i1++]; "nVK< Vd
else K5P Gi#
data[cur]=temp[i2++]; p@#]mVJ>9
} JzHqNUn*M
} Z1VC5*K
Gh2#-~|cB
} t[%x}0FP-F
^Ku\l #B
改进后的归并排序: q]F4Lq(
EYA/CI
package org.rut.util.algorithm.support; x$~3$E
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import org.rut.util.algorithm.SortUtil; MinbE13?U
%p<$|'
/** CT|z[^
* @author treeroot P;j&kuW|zL
* @since 2006-2-2 :lgHL3yl
* @version 1.0 EC<5M5Lc
*/ 7*+Km'=M
public class ImprovedMergeSort implements SortUtil.Sort { YkSuwx@5_q
r])Z9bbi
private static final int THRESHOLD = 10; nHrP>zN
_o\>V:IZ
/* - o4@#p>>
* (non-Javadoc) \^Ep>Pq`]
* 9X!ET!
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) $2Kau 1
*/ ~q*i;*
public void sort(int[] data) { PoJmW^:}
int[] temp=new int[data.length]; -UJ?L
mergeSort(data,temp,0,data.length-1); 3voW
} aD+0\I[x
L{!ihJr
private void mergeSort(int[] data, int[] temp, int l, int r) { a[q84[OQ
int i, j, k; D)y{{g*Lnm
int mid = (l + r) / 2; v}Z9+ yRC2
if (l == r) [w,(EE
return; }6<)yW}U
if ((mid - l) >= THRESHOLD) h5x*NM1Ih
mergeSort(data, temp, l, mid); K*[9j 0
else M|ms$1x
insertSort(data, l, mid - l + 1); !IN@i:m
if ((r - mid) > THRESHOLD) -<xyC8$^$
mergeSort(data, temp, mid + 1, r); :MK=h;5Z
else B#1:Y;Z
insertSort(data, mid + 1, r - mid); mU>&ql?e
]+mjOks~
for (i = l; i <= mid; i++) { 3u*82s\8T
temp = data; DTPay1]6
} 8}bZ[
for (j = 1; j <= r - mid; j++) { -H`\? R
temp[r - j + 1] = data[j + mid]; ]\7lbLv
} 9MT? .q
int a = temp[l]; JfbKf~g
int b = temp[r]; s\_l=v3
for (i = l, j = r, k = l; k <= r; k++) { `{DG;J03[
if (a < b) { yji>*XG
data[k] = temp[i++]; FW_G\W.
a = temp; Vz'HM$
} else { UkZ\cc}aC/
data[k] = temp[j--]; z/weit
b = temp[j]; 7 %3<~'v[
} *_PPrx5
} !I~C0u
} 4\\.n
s1{[{L3
/** un6cD$cHr
* @param data `%oIRuYG]j
* @param l _AprkI_
* @param i mGO>""<:
*/ `YU=~xQ
private void insertSort(int[] data, int start, int len) { 2yvVeo&3
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); #\LZ;&T'N
} Nl {7
} U~wjR"='
} JIMWMk;ot
} o*-9J2V=J
-3` "E%9
堆排序： La9r
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package org.rut.util.algorithm.support; 7lwTZ*rnY
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import org.rut.util.algorithm.SortUtil; '#A:.P
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/** e{0L%%2K
* @author treeroot y+A{Y
* @since 2006-2-2 tfA}`*$s
* @version 1.0 %kq ^]S2O
*/ yc[(lq.^n
public class HeapSort implements SortUtil.Sort{ 8bt53ta
;T>+,
/* (non-Javadoc) &L%Jy #=
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) PyFj@n
*/ x/xb1"
public void sort(int[] data) { srK53vKMHW
MaxHeap h=new MaxHeap(); 'y.JcS!|
h.init(data); ;\x~'@
for(int i=0;i h.remove(); wdwp9r
System.arraycopy(h.queue,1,data,0,data.length); L7}i q0
} nVXg,Jl
:Jk33 N4y0
private static class MaxHeap{ tFiR!f)
3{e'YD~hP
void init(int[] data){ g8l5.Mpx
this.queue=new int[data.length+1]; @o&Ytd;i
for(int i=0;i queue[++size]=data; @cIgxp
fixUp(size); LWD#a~
} nv)))I\
} 6{.J:S9n
!R6ApB4ZI
private int size=0; (ii(yz|
,#d[ad<
private int[] queue; `eC+% O
;Xu22fKh
public int get() { B?3juyB`--
return queue[1]; @1g&Z}L o
} SO3cY#i z"
+xp*]a
public void remove() { _B[WY
SortUtil.swap(queue,1,size--); :6D0j
fixDown(1); L M /Ga
} Jq)U</
file://fixdown /H)Br~ l
private void fixDown(int k) { a+Ab]m8`
int j; 63M=,0-Qt
while ((j = k << 1) <= size) { DsGI/c
if (j < size %26amp;%26amp; queue[j] j++; %i"}x/CD[
if (queue[k]>queue[j]) file://不用交换 5un^yRMB-
break; g<a<*)&
SortUtil.swap(queue,j,k); _mk5^u/u
k = j; 1TZPef^y
} 7"cv|6y|
} \|t{e8}
private void fixUp(int k) { f4"4ZVcr
while (k > 1) { DP*@dFU"
int j = k >> 1; 9Ejyg*
if (queue[j]>queue[k]) ]Ik%#l.G_
break; /_*>d)
SortUtil.swap(queue,j,k); wa ky<w,
k = j; X#ZgS!Mn
} V!&P(YO:
} {/|qjkT&W
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} 6Dst;:
J(s;$PG
} 6I>^Pf'ND
/g76Hw>H
SortUtil： QDE$E.a
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package org.rut.util.algorithm; @G*.1;jO
MhxDV d
import org.rut.util.algorithm.support.BubbleSort; cAEokP
import org.rut.util.algorithm.support.HeapSort; )yj:PY]
import org.rut.util.algorithm.support.ImprovedMergeSort; qyyq&
import org.rut.util.algorithm.support.ImprovedQuickSort; Q9slfQ
import org.rut.util.algorithm.support.InsertSort; w4%AJmt
import org.rut.util.algorithm.support.MergeSort; {Uq:Xw
import org.rut.util.algorithm.support.QuickSort; H;S%Y`V
import org.rut.util.algorithm.support.SelectionSort; |=5/Rax^
import org.rut.util.algorithm.support.ShellSort; 0+`Pg
>emcJVYV`[
/** *||d\peQ
* @author treeroot _u5dC
* @since 2006-2-2 /S~m)$vu
* @version 1.0 A,#2^dR
*/ jO8k6<l
public class SortUtil { .=<$S#x^Hb
public final static int INSERT = 1; E FY@Y[
public final static int BUBBLE = 2; o8ppMM8_R[
public final static int SELECTION = 3; XUSvhr$|
public final static int SHELL = 4; ^E,1V5
public final static int QUICK = 5; O3qM1-k}S
public final static int IMPROVED_QUICK = 6; Phs-(3
public final static int MERGE = 7; Cq\I''~8
public final static int IMPROVED_MERGE = 8; 4!%F\c46
public final static int HEAP = 9; B42sb_
zwr\:Hu4
public static void sort(int[] data) { W^3;F1
sort(data, IMPROVED_QUICK); 1@_T m
} #/ "+
private static String[] name={ ; Lql_1
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" *e/K:k
}; 1%`7.;!i
BX< dSK
private static Sort[] impl=new Sort[]{ AGq>=avv
new InsertSort(), ]KuMz p!
new BubbleSort(), ]'h; {;ug
new SelectionSort(), XG 0v
new ShellSort(), RU&_j*U
new QuickSort(), _Qd,VE 8u
new ImprovedQuickSort(), o6L9UdT
new MergeSort(), r;gP}H ?
new ImprovedMergeSort(), y%cO#P@
new HeapSort() -F1- e+=
}; (OmH~lSO.
k \qiF|B)Z
public static String toString(int algorithm){ e@n!x}t8
return name[algorithm-1]; L?RF;jf
} 2R.2D'4)`
UVEz;<5@\
public static void sort(int[] data, int algorithm) { ]RIVc3?;$
impl[algorithm-1].sort(data); KQ`=t
} G>z,#Xt
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public static interface Sort { %b}gDWs
public void sort(int[] data); _*6v|Ed?
} k\7:{y@,
XDz5b.,
public static void swap(int[] data, int i, int j) { ry0%a[[
int temp = data; 9uYyfb: ,z
data = data[j]; HeA{3s
data[j] = temp; }Je>;{&%
} ;*cLG#&'M
} {9 PR()_