[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; I`_I^C3
} Y X^c}t}U
int i1=l; [8a(4]4
int i2=mid+1; e.skE>&
for(int cur=l;cur<=r;cur++){ |$b8(g$s)
if(i1==mid+1) y]0O"X-G
data[cur]=temp[i2++]; GdcXU:J /
else if(i2>r) >x JzV
data[cur]=temp[i1++]; ~1%*w*
else if(temp[i1] data[cur]=temp[i1++]; IJ&Lk=2E]
else W-l+%T!
data[cur]=temp[i2++]; xa@$cxt
} A1INaL
} = V2Rq(jH
O-X(8<~H=
} Xg96I:r'p
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改进后的归并排序: **L&I5Hhm
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package org.rut.util.algorithm.support; jwT` Z
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import org.rut.util.algorithm.SortUtil; .@E5dw5
DPjs?M<
/** Lo%vG{yTr
* @author treeroot -dixiJ=
* @since 2006-2-2 s`_EkFw>Gl
* @version 1.0 h/t;ZLUAZP
*/ (<r)xkn
public class ImprovedMergeSort implements SortUtil.Sort { tg@61V?>
>jsY'Bm
private static final int THRESHOLD = 10; U?sHh2*
Tj#S')s8
/* :31_WJ^
* (non-Javadoc) ()IZ7#kL?
* Ik$$Tn&;
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) le\-h'D
*/ *,4rYb7I w
public void sort(int[] data) { $G`CXhbl
int[] temp=new int[data.length]; \ saV8U7B
mergeSort(data,temp,0,data.length-1); pOXI*0_g.
} TvDSs])
Qdq;C,}Ai.
private void mergeSort(int[] data, int[] temp, int l, int r) { (s,&,I=@
int i, j, k; KU,SAcfR7
int mid = (l + r) / 2; c$!?4z_.
if (l == r) Qc3d<{7\~
return; 7K\v=
if ((mid - l) >= THRESHOLD) bRxI7 '
mergeSort(data, temp, l, mid); Ze~P6
else Uv(R^50>
insertSort(data, l, mid - l + 1); ; R}>SS'
if ((r - mid) > THRESHOLD) ^)~Smj^d
mergeSort(data, temp, mid + 1, r); Wp>t\S~N
else 'vd&r@N
insertSort(data, mid + 1, r - mid); |@u2/U9
O~*i_t*i9{
for (i = l; i <= mid; i++) { f%,S::%Ea
temp = data; D<6$@ZJ
} reN\|?0{
for (j = 1; j <= r - mid; j++) { Xe%J{
temp[r - j + 1] = data[j + mid]; (Lgea
} v:P]o9Oj8
int a = temp[l]; +d6onO{8
int b = temp[r]; v1,#7sAW'
for (i = l, j = r, k = l; k <= r; k++) { N.JR($N$
if (a < b) { TRGpE9i
data[k] = temp[i++]; H54RA6$>
a = temp; x#EE_i/W
} else { KSPa2>lz?
data[k] = temp[j--]; gB'ajX=OA/
b = temp[j]; y''~j<'
} ayA;6Qt
} w0_P9g:
} V1]GOmXz
r >'tE7W9
/** o}v<~v(
* @param data ~#sD2b`0
* @param l `q-+r1u
* @param i LeLUt<4~
*/ jw:z2:0~
private void insertSort(int[] data, int start, int len) { S[zvR9AW&
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); $H@SXx
} &s+l/;3
} ~.W]x~X$
} r'OqG^6JFN
} SUc%dpXZa
UH!(`Z\C
堆排序： W~ ~'
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package org.rut.util.algorithm.support; 1,wcf,
ddfGR/1X
import org.rut.util.algorithm.SortUtil; ^aSb~lce
-Q n-w3~&
/** sG`x |%t
* @author treeroot X<L=*r^C,=
* @since 2006-2-2 >9{?&#]x
* @version 1.0 SY+0~5E
*/ fkZHy|m
public class HeapSort implements SortUtil.Sort{ EB[T 5{
G!Zb27u+
/* (non-Javadoc) y!=,u
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 7[1Lh'u
*/ SboHo({5VA
public void sort(int[] data) { wb$uq/|
MaxHeap h=new MaxHeap(); .g8*K "
h.init(data); u"HGT=Nl
for(int i=0;i h.remove(); b(0<,r8
System.arraycopy(h.queue,1,data,0,data.length); Uj(0M;#%o+
} 62sl6WWS3
PQ4mNjXN
private static class MaxHeap{ RsZj
sUG!dwqqd
void init(int[] data){ 3(WijtH
this.queue=new int[data.length+1]; +HS]kFH
for(int i=0;i queue[++size]=data; eN=jWUoCh
fixUp(size); 3YvKHn|V"
} ~m6=s~Vn
} gK rUv0&F
= QBvU)Ki
private int size=0; !/}3/iU
pa!BJ]~
private int[] queue; %+~\I\)1
z5jw\jBD
public int get() { %zcA|SefP
return queue[1]; e(t}$Q=
} 8FuxN2
).71gp@&
public void remove() { iww/s
SortUtil.swap(queue,1,size--); *BsK6iVb
fixDown(1); Ixa0;nxj
} q^aDZzx,z
file://fixdown YbZbA >|
private void fixDown(int k) { 0fOhCxtL@
int j; ]*=4>(F[
while ((j = k << 1) <= size) { gA2Wo+\^bq
if (j < size %26amp;%26amp; queue[j] j++; T`x|=}
if (queue[k]>queue[j]) file://不用交换 {srP3ll P
break; E#J})cPzw
SortUtil.swap(queue,j,k); f!'i5I]
k = j; fp [gKRSF
} 4'O,xC
} ?9~^QRLT
private void fixUp(int k) { u}5CzV`
while (k > 1) { {,%&}kd>
int j = k >> 1; lb_N"90p
if (queue[j]>queue[k]) OH t)z.
break; i\sBey ND"
SortUtil.swap(queue,j,k); >bW=oTFz
k = j; ~+Gh{,f
} WE) *~5
} *~^63Nx!
0>{ ]*
} ?h}NL5a
i;O_B5 d
} 3}|[<^$
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SortUtil： Y^+x<
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package org.rut.util.algorithm; 2z-Nw <bA
w/6X9d
import org.rut.util.algorithm.support.BubbleSort; {'IO
import org.rut.util.algorithm.support.HeapSort; 11oNlgY&
import org.rut.util.algorithm.support.ImprovedMergeSort; kOydh(yE
import org.rut.util.algorithm.support.ImprovedQuickSort; r07u6OA
import org.rut.util.algorithm.support.InsertSort; DB|1Sqjsn
import org.rut.util.algorithm.support.MergeSort; ^ptybVo
import org.rut.util.algorithm.support.QuickSort; JN wI{
import org.rut.util.algorithm.support.SelectionSort; kvwnqaX
import org.rut.util.algorithm.support.ShellSort; iHPsRq!
$*0-+h
/** ^\}qq>_
* @author treeroot H!IVbL`a{
* @since 2006-2-2 9#z$GO|<
* @version 1.0 q<:8{Y|
*/ q A .9X4NQ
public class SortUtil { z.8/[)
public final static int INSERT = 1; TE Z%|5(]
public final static int BUBBLE = 2; F vkyp"W3
public final static int SELECTION = 3; S`kOtZ_N n
public final static int SHELL = 4; Pxr/*X
public final static int QUICK = 5; >PA*L(Dh%
public final static int IMPROVED_QUICK = 6; 3F;C{P!
public final static int MERGE = 7; G&*P*f1S
public final static int IMPROVED_MERGE = 8; 23?u_?+4i
public final static int HEAP = 9; c>LP}PGk
&>\;4E.O5
public static void sort(int[] data) { *V2;ds.~
sort(data, IMPROVED_QUICK); p~w] ~\
} vD#U+
private static String[] name={ (=!At)O
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" {[!<yUJ`S#
}; !yd B,S
d0>U-.
private static Sort[] impl=new Sort[]{ ce;7
new InsertSort(), HP8J\`
new BubbleSort(), r XJx~ g
new SelectionSort(), ga +, P
new ShellSort(), ]d1'5F][H
new QuickSort(), "-&K!Vfs
new ImprovedQuickSort(), y RxrfAdS
new MergeSort(), jSp&\Wjb
new ImprovedMergeSort(), Qf~>5(,h
new HeapSort() M{jXo%C
}; uMQI Aapb
dL0Q8d\^T
public static String toString(int algorithm){ D>5)',D8xi
return name[algorithm-1]; z206fF
} ia5%
vqeH<$WHvy
public static void sort(int[] data, int algorithm) { *p(_="J,
impl[algorithm-1].sort(data); $}&a*c>
} \foThLx
bN_e~z
public static interface Sort { )k(K/m
public void sort(int[] data); X~r9yl>
} 1 m'.wh|
o ]*yI[\
public static void swap(int[] data, int i, int j) { x {NBhq(4
int temp = data; GJ%^hr`P
data = data[j]; 0Q{lyu
data[j] = temp; }h^ fX
} 1K9.3n
} v[ iJ(C_