[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; 0(hv#C4
} orQV'
int i1=l; 17n+4J]
int i2=mid+1; V^Mf4!A(y
for(int cur=l;cur<=r;cur++){ wKi}@|0[@
if(i1==mid+1) }KD7 Y
data[cur]=temp[i2++]; 4l%?mvA^m
else if(i2>r) v`_i1h9p{
data[cur]=temp[i1++]; Pi"~/MGP$
else if(temp[i1] data[cur]=temp[i1++]; iFwyh`Bcg
else YM`:L
data[cur]=temp[i2++]; #GY&$8.u*
} 38*'8=Y#>
} $&xuVBs
||'i\X|[
} N[a ljC-R
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改进后的归并排序: XAQ\OX#
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package org.rut.util.algorithm.support; @`IXu$Wm(
z)ft3(!
import org.rut.util.algorithm.SortUtil; ;*wT,2;
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/** :tjgg]
* @author treeroot 409x!d~it
* @since 2006-2-2 E~<(i':
* @version 1.0 d-ag
*/ un$ Z7W/
public class ImprovedMergeSort implements SortUtil.Sort { T1Gp$l
Qc&-\kQ:$u
private static final int THRESHOLD = 10; SLQ\Y%F
SG dfhno;
/* wr3_Bf3]
* (non-Javadoc) xs2,t*
* j[m_qohd7
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) h V|v6 _
*/ {z5V{M(|w3
public void sort(int[] data) { vgh^fa!/
int[] temp=new int[data.length]; J8GXI:y
mergeSort(data,temp,0,data.length-1); gqP-E
} KrdZEi vb
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private void mergeSort(int[] data, int[] temp, int l, int r) { RjR&D?dc
int i, j, k; C@TN5?Z
int mid = (l + r) / 2; ,>bGbx
if (l == r) [)Z'N/;0
return; cX|[WT0[I
if ((mid - l) >= THRESHOLD) .%x"t>]
mergeSort(data, temp, l, mid); ?qd,>
else i\kTm?BQZ
insertSort(data, l, mid - l + 1); QMXD9H0{
if ((r - mid) > THRESHOLD) O8K@&V p
mergeSort(data, temp, mid + 1, r); wMH[QYb<*
else Ss@u,`pr
insertSort(data, mid + 1, r - mid); Xmap9x
tr6jh=
for (i = l; i <= mid; i++) { @9}),hl`
temp = data; zdxT35h
} a,/M'^YyN
for (j = 1; j <= r - mid; j++) { w?]ZU-
temp[r - j + 1] = data[j + mid]; e-[>( n/[
} HG{&U:>)
int a = temp[l]; ~w Zl2I
int b = temp[r]; ]dPVtk
for (i = l, j = r, k = l; k <= r; k++) { 0t#NMW
if (a < b) { D~G5]M,}$
data[k] = temp[i++]; ]}mly`Fw
a = temp; d\~p5_5.
} else { L.C ^E7;Z_
data[k] = temp[j--]; zY7*[!c2
b = temp[j]; (v|r'B9b
} "rme~w Di
} g".d"d{
} :V&N\>Wo
B#HV20\?v
/** +V)qep"
* @param data }1U#Ve,=_
* @param l t$U3|r
* @param i nc3sty1`
*/ ES^>[2Y
private void insertSort(int[] data, int start, int len) { ;j>*;Q`
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 0lX)Cl
} mgi,b2
} 6B7<
} 1vB-M6(
} eq^TA1>T
vS7/~:C
堆排序： C>*5=p|T
6-mmi7IfO
package org.rut.util.algorithm.support; DRH'A!r!
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import org.rut.util.algorithm.SortUtil; Hze-Ob8
G 6Wx3~
/** ( MB`hk-d
* @author treeroot M (+.$uz
* @since 2006-2-2 o .l;: Un
* @version 1.0 p]wP36<S!
*/ uz]E_&2
public class HeapSort implements SortUtil.Sort{ :|Z$3q
R;H?gE^m-
/* (non-Javadoc) 1a<]$tZk
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) (7IqY1W
*/ <A)+|Y"^h6
public void sort(int[] data) { Vo #:CB=8
MaxHeap h=new MaxHeap(); jr9&.8%W:v
h.init(data); Y8)}PWMs
for(int i=0;i h.remove(); _Ny8j~
System.arraycopy(h.queue,1,data,0,data.length); =kd YN5R
} ,5/V@;i
q.-y)C) ;
private static class MaxHeap{ o:_^gJ+|
G7 1U7
void init(int[] data){ sa_R$ /H
this.queue=new int[data.length+1]; u FMIY(vB
for(int i=0;i queue[++size]=data; DC&A1I&
fixUp(size); Ee&hG[sx
} }<SNO)h3
} vKU`C?,L
:bwM]k*$
private int size=0; =g@R%NDNV
zu52p4
private int[] queue; CE{z-_{^
D,k(~
public int get() { WElrk:b
return queue[1]; jRofG'
} R4V \B
HzE1r+3Q@
public void remove() { WNhbXyp_
SortUtil.swap(queue,1,size--); H6_xwuw:
fixDown(1); [!G)$<
} 4RhR[
file://fixdown QjLji+L
private void fixDown(int k) { p"KU7-BfvC
int j; O:1DOUYXs
while ((j = k << 1) <= size) { -PM)EGSk{
if (j < size %26amp;%26amp; queue[j] j++; h}avX*Lx_
if (queue[k]>queue[j]) file://不用交换 qtHfz"p
break; F<5nGx cC
SortUtil.swap(queue,j,k); "9qp"%
k = j; ):krJ+-/y
} cqEHYJ;B
} Xem 05%,
private void fixUp(int k) { wy''tqg6
while (k > 1) { `K w7"
int j = k >> 1; Y~az!8j;Z
if (queue[j]>queue[k]) kBbl+1{H
break; Uh.Sc:trA
SortUtil.swap(queue,j,k); 9mQ#L<Ps
k = j; vXb:
} $_)=8"Sn
} ,<sm,!^<r
4b4QbJ$
} aM$\#Cx
eaQ90B4
} f/ajejYo?,
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SortUtil： ~n6[$WjZA
;-Ss# &
package org.rut.util.algorithm; {7X#4o0
2Pp&d>E4
import org.rut.util.algorithm.support.BubbleSort; |6%.VY2b
import org.rut.util.algorithm.support.HeapSort; "V3}t4
import org.rut.util.algorithm.support.ImprovedMergeSort; .B>B`q;B
import org.rut.util.algorithm.support.ImprovedQuickSort; %,|ztH/ Q
import org.rut.util.algorithm.support.InsertSort; t^.'>RwW|
import org.rut.util.algorithm.support.MergeSort; )Pli})
import org.rut.util.algorithm.support.QuickSort; $M':&i5`,
import org.rut.util.algorithm.support.SelectionSort; =MC~GXJSNw
import org.rut.util.algorithm.support.ShellSort; v)):$s?WB
Wt J{
/** gLIT;BK
* @author treeroot w>qCg XU3
* @since 2006-2-2 (S oo<.9~
* @version 1.0 H0a-(
*/ =Y9\DeIZ
public class SortUtil { pcH<gF(k
public final static int INSERT = 1; 'S?;J ,/
public final static int BUBBLE = 2; J{Tq%\a3
public final static int SELECTION = 3; Zhzy.u/>
public final static int SHELL = 4; ,-'4L9
public final static int QUICK = 5; 6e.v&f7(
public final static int IMPROVED_QUICK = 6; : ,p||_G&
public final static int MERGE = 7; bC~~5Cm
public final static int IMPROVED_MERGE = 8; Q2/.6O8
public final static int HEAP = 9; ~Fw<eY
]TSg!H
public static void sort(int[] data) { .+E#q&=
sort(data, IMPROVED_QUICK); dig~J\
} KFDS q"j
private static String[] name={ |y"jZT6R}t
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ?z/Vgk+9|
}; ~O: U|&
|)o#|Qo
private static Sort[] impl=new Sort[]{ t};~H\:
new InsertSort(), TJaeQqob
new BubbleSort(), sS!w}o2X
new SelectionSort(), &[@\f^~
new ShellSort(), :.iyR
new QuickSort(), S &JJIFftO
new ImprovedQuickSort(), H{V)g
new MergeSort(), \Hwg) Uc{
new ImprovedMergeSort(), ~O;y?]U
new HeapSort() Ue$zH"w
}; #U=;T]!'$
n.hElgkUOr
public static String toString(int algorithm){ :eOR-}p'
return name[algorithm-1]; ;;V\"7q'
} f vLC_'M
*Oo &}oAj
public static void sort(int[] data, int algorithm) { 7>i2OBkAhB
impl[algorithm-1].sort(data); k\N4@UK
} A+ 0,i
E'c%d[:H,
public static interface Sort { ;=jr0\|e
public void sort(int[] data); &|5GB3H=
} },c,30V'
IfV 3fJ7
public static void swap(int[] data, int i, int j) { kWL.ewTiex
int temp = data; 4;KWG}~[o
data = data[j]; 0JY WrPR
data[j] = temp; [VSU"AJY
} EO)%UrWnC
} +.Bmkim