[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; {15j'Qwm
} d t/AAk6
int i1=l; Wn%P.`o#
int i2=mid+1; ?w3RqF@}
for(int cur=l;cur<=r;cur++){ mw@Pl\=
if(i1==mid+1) &5CRXf
data[cur]=temp[i2++]; })g<I+]Hf9
else if(i2>r) ?Oyo /?/
data[cur]=temp[i1++]; cc@W 6W
else if(temp[i1] data[cur]=temp[i1++]; tpfgUZ{
else S}6Ld(_
data[cur]=temp[i2++]; Q@D7\<t
} SSK}'LQ
} GO"`{|o
222 Y?3>@D
} /K=OsMl2b8
C$[d~1t6
改进后的归并排序: 6h 0qtXn-
OO:S2-]Y>e
package org.rut.util.algorithm.support; B8&q$QV
(gt\R}
import org.rut.util.algorithm.SortUtil; Fmk:[hMw
X5 vMY
/** [xS7ae
* @author treeroot qu=~\t1[6
* @since 2006-2-2 dwOfEYC
* @version 1.0 "1O_h6C
*/ 0~|0D#klB
public class ImprovedMergeSort implements SortUtil.Sort { XlppA3JON|
v%tjZ5x
private static final int THRESHOLD = 10; |t,sK aL
5100fX}
/* x:SjdT
* (non-Javadoc) <=(K'eqC^
* Vt`4u5HG
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) l*CulVX
*/ QiCia#_
public void sort(int[] data) { l`v5e"V
int[] temp=new int[data.length]; /[R=-s ;
mergeSort(data,temp,0,data.length-1); UZdnsG7
} >6es 5}
~OD6K`s3
private void mergeSort(int[] data, int[] temp, int l, int r) { c`E>7Hjr-
int i, j, k; Z+xkN
int mid = (l + r) / 2; Kz'GAm\
if (l == r) X5WA-s(?0
return; R|?n
if ((mid - l) >= THRESHOLD) g=:o'W$@
mergeSort(data, temp, l, mid); e$LC
else Et6j6gmif
insertSort(data, l, mid - l + 1); rO87V!Cj
if ((r - mid) > THRESHOLD) /xn|d#4
mergeSort(data, temp, mid + 1, r); vJE=H9E
else _Sjj|j
insertSort(data, mid + 1, r - mid); <IrhR,@M,L
[s}W47N1
for (i = l; i <= mid; i++) { N"9^A^w8k
temp = data; fh#:j[R4e
} T;u;r@R/
for (j = 1; j <= r - mid; j++) { rCJ$Pl9R
temp[r - j + 1] = data[j + mid]; tP_.-//
} ?e%*q^~Cu
int a = temp[l]; FM]clC;X?
int b = temp[r]; 9Og
for (i = l, j = r, k = l; k <= r; k++) { JMAdsg/
if (a < b) { |s/)lA:9
data[k] = temp[i++]; +9/K|SB{$
a = temp; `;mgJD
} else { m mF0RNE
data[k] = temp[j--]; lhM5a \
b = temp[j]; :ok.[q
} G[}v?RLI
} +149 o2
} c@A.jc
u?V}pYX
/** 8kKL=
* @param data nscnG5'{+
* @param l a>C;HO
* @param i "Lvk?k )hx
*/ q:_:E*o
private void insertSort(int[] data, int start, int len) { xst-zfkH`
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); "%K'~"S#Q,
} ?CCQm
} l#uF%;GDX
} @de ZZ
} LYAGpcG
JbEEI(Q>g
堆排序： M._h=wX{}
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package org.rut.util.algorithm.support; :E{)yT
+:Xg7H*
import org.rut.util.algorithm.SortUtil; lP=,|xFra
;nlJD#
/** #@nPB.
* @author treeroot Uhu?G0>O
* @since 2006-2-2 &%v*%{|j
* @version 1.0 !UT!PX)
*/ hxdjmc-
public class HeapSort implements SortUtil.Sort{ {^ BZ#)m|
$Ptl&0MN%
/* (non-Javadoc) DK2Wjr;
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) b+Sj\3fX
*/ I3Co
public void sort(int[] data) { A46dtFD{
MaxHeap h=new MaxHeap(); YS4"TOFw
h.init(data); Vuy%7H
for(int i=0;i h.remove(); +%<kcc3
System.arraycopy(h.queue,1,data,0,data.length); 0rX%z$D+@
} AW;xlY= g
6x5Q*^w
private static class MaxHeap{ J<NpA(@^
ZC$u8$+P
void init(int[] data){ nYC.zc*ox
this.queue=new int[data.length+1]; r:rPzq1
for(int i=0;i queue[++size]=data; Li8/GoJW-T
fixUp(size); )EYs+7/t
} R,7.o4Wt
} <bn|ni|c"
DZ`,QWuA
private int size=0; 8bw,dBN
Lcg1X3$G
private int[] queue; j!L7r'AV5
\k$cg~
public int get() { 1C=42ZZ&2
return queue[1]; ("f~gz<<
} \{(cz/]G/
>y}> 5kv
public void remove() { *?Oh%.HgF
SortUtil.swap(queue,1,size--); )MV `'i
fixDown(1); Q(WfWifu-|
} SA"4|#3>7
file://fixdown \HMuVg'Q
private void fixDown(int k) { 0/fwAp
int j; /^i_tLgb
while ((j = k << 1) <= size) { !!6@r|.
if (j < size %26amp;%26amp; queue[j] j++; Vs>e"czfm/
if (queue[k]>queue[j]) file://不用交换 ](+u'8
break; YYe<StyH
SortUtil.swap(queue,j,k); < A`srmS?
k = j; FIJ]`
} uYE"OUNWL
} <0/)v J- 9
private void fixUp(int k) { 5:~ zlg
while (k > 1) { 3;//o<
int j = k >> 1; HS.eK#:N
if (queue[j]>queue[k]) +>tSO!}[
break; ;F2"gTQS
SortUtil.swap(queue,j,k); 7*+tG7I @
k = j; >)`*:_{
} h-03]M#8=
} h?QGJ^#8
lo7>$`Q
} n2opy8J#!
uY&t9L8
} =EHKu|rX~
_bCIVf`
SortUtil： pW<l9W
m*AiP]Qu
package org.rut.util.algorithm; 3|Y.+W
_:XX+3W7
import org.rut.util.algorithm.support.BubbleSort; $B )jSxSy
import org.rut.util.algorithm.support.HeapSort; ~. 5[
import org.rut.util.algorithm.support.ImprovedMergeSort; ;3=RM\
import org.rut.util.algorithm.support.ImprovedQuickSort; YQ-V^e6
import org.rut.util.algorithm.support.InsertSort; Jb!s#g
import org.rut.util.algorithm.support.MergeSort; F@xKL;'N74
import org.rut.util.algorithm.support.QuickSort; {>yy3(N
import org.rut.util.algorithm.support.SelectionSort; E**Hu9
import org.rut.util.algorithm.support.ShellSort; w!l*!G
jq[Q>"f
/** d`xDv$QZ
* @author treeroot c*V/2" 5
* @since 2006-2-2 ?2S<D5MSb
* @version 1.0 Y-y}gc_L
*/ \2[
public class SortUtil { B5qlU4km&
public final static int INSERT = 1; Yx"~_xA/u
public final static int BUBBLE = 2; 5Noy~;
public final static int SELECTION = 3; 1{CVd m<9
public final static int SHELL = 4; m/=nz.
public final static int QUICK = 5; N:lfKI
public final static int IMPROVED_QUICK = 6; ]fM|cN8(zM
public final static int MERGE = 7; S1QMS
public final static int IMPROVED_MERGE = 8; Scrj%h%[
public final static int HEAP = 9; 'ITq\1z
;U* /\+*h
public static void sort(int[] data) { [dJ!JT/X{
sort(data, IMPROVED_QUICK); &hYgu3O
} P[3i!"O>
private static String[] name={ 42dv3bE"
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" G2`z?);1b
}; )~U1sW&t
i7Qb~RW
private static Sort[] impl=new Sort[]{ nfEbu4|
new InsertSort(), Geq]wv8
new BubbleSort(), %f]#P8VP
new SelectionSort(), *tXyd<_Hd
new ShellSort(), c*IrZm
new QuickSort(), vIV|y>;g
new ImprovedQuickSort(), u$T]A8e
new MergeSort(), `!]|lI!GW
new ImprovedMergeSort(), c1f"z1Z
new HeapSort() ]+D@E2E
}; Rc1j^S;>
UoT`/.
public static String toString(int algorithm){ ]oGd,v X
return name[algorithm-1]; @c|=onx5
} t13V>9to
YSD G!
public static void sort(int[] data, int algorithm) { &4?&tGi
impl[algorithm-1].sort(data); s)-oCT$[
} h^3gYL7O6
V*?cMJ_G
public static interface Sort { eRMN=qP.q
public void sort(int[] data); @A,8>0+
} d/d)MoaJ*t
d( v"{N}
public static void swap(int[] data, int i, int j) { Dz}i-tw+
int temp = data; '@{:FrG*U
data = data[j]; qb"S
data[j] = temp; 0Ui.nz j
} }_+XN"}C
} CNNqS^ct