[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; s;S?;(QI
} XWS%zLaK
int i1=l; j/r]wd"aUS
int i2=mid+1; r? NznNVU
for(int cur=l;cur<=r;cur++){ =|3ek
if(i1==mid+1) #\.,?A}9
data[cur]=temp[i2++]; ]B%v+uaW
else if(i2>r) Po__-xN>Q
data[cur]=temp[i1++]; kb{]>3Y"
else if(temp[i1] data[cur]=temp[i1++]; %l}D.ml
else f]`#J%P
data[cur]=temp[i2++]; TMlP*d#
} ^S UPi
} b&~4t/Vq
'_w=k4
} b[t>te
r@+ri1c
改进后的归并排序: OWjk=u2Lz
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package org.rut.util.algorithm.support; VY;{/.Sa
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import org.rut.util.algorithm.SortUtil; -@yh>8v
[ sN EHf
/** (@<lRA ^
* @author treeroot 4)h]MOZ
* @since 2006-2-2 dJ2Hr;Lc
* @version 1.0 >/kcdWl
*/ uxtWybv
public class ImprovedMergeSort implements SortUtil.Sort { 7n8~K3~;
_=Z,E.EN
private static final int THRESHOLD = 10; Xjo5v*Pu
/'].lp
/* ^)(bM$(`
* (non-Javadoc) ~P8tUhffK
* T>}5:,N~
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 66/3|83Z
*/ 5][Ztx
public void sort(int[] data) { 5R@
int[] temp=new int[data.length]; \6E|pbJ}x
mergeSort(data,temp,0,data.length-1); !sDh4jQ`
} ^?0DP>XA
/^X/8
private void mergeSort(int[] data, int[] temp, int l, int r) { y#Fv+`YDl
int i, j, k; Xu<k3oD7
int mid = (l + r) / 2; 42e|LUZg
if (l == r) SM0~fAtE
return; tZ=E')!\
if ((mid - l) >= THRESHOLD) C${Vg{g7a
mergeSort(data, temp, l, mid); @R/07&lBR
else {sihus#Q
insertSort(data, l, mid - l + 1); ?t/~lv
if ((r - mid) > THRESHOLD) r@v,T8
mergeSort(data, temp, mid + 1, r); K`iv c N"
else i]Fp..`v~
insertSort(data, mid + 1, r - mid); >XY`*J^
6-yd]("
for (i = l; i <= mid; i++) { (i34sqV$m
temp = data; Z*y`R XE
} !V"<U2
for (j = 1; j <= r - mid; j++) { !>{G,\^=pT
temp[r - j + 1] = data[j + mid]; 6+.uU[x@
} N^HUijw<
int a = temp[l]; 2^mJ+v<
int b = temp[r]; 9o;^[Ql-
for (i = l, j = r, k = l; k <= r; k++) { ,sA[)wP{
if (a < b) { G;v8$)Zj
data[k] = temp[i++]; #33fGmd[
a = temp; jhXkSj
} else { Q<h-FW8z
data[k] = temp[j--]; yaah*1ip[
b = temp[j]; xC*6vH]?
} T*#/^%HSG
} @ zs'Y8
} ^T ?RK"p
U]^HjfX\
/** *AoR==:ya
* @param data Y? x,
* @param l xIxn"^'
* @param i sm0xLZ
*/ 5b!vgm#])
private void insertSort(int[] data, int start, int len) { ;i Fz?d3;
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); UUzYbuS>&l
} =NnNN'}
} m@"QDMHk.
} #JgH}|&a$
} ^HV>`Pjd}=
(eCJ;%%k
堆排序： }`W){]{kO
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package org.rut.util.algorithm.support; +?u~APjNN
q#vQv5
import org.rut.util.algorithm.SortUtil; RA KFU
d]:I(9K
/** w8kOVN2b
* @author treeroot -R57@D>j\
* @since 2006-2-2 Fy`(BF\
* @version 1.0 (yF:6$:#
*/ zA$k0p
public class HeapSort implements SortUtil.Sort{ N['qgO/
&>%T^Y|J4
/* (non-Javadoc) SnE(o)Q
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) R%Q@
*/ b~'"^ Bts*
public void sort(int[] data) { GliwY_
MaxHeap h=new MaxHeap(); k.uMp<)D
h.init(data); zaah^.MA|
for(int i=0;i h.remove(); 4*Q#0`um
System.arraycopy(h.queue,1,data,0,data.length); ^.1c{0Y^0
} 7on.4/;M
=x<ge_Y
private static class MaxHeap{ }dp=?AFg
2.%.Z_k)
void init(int[] data){ 9[G[$c
this.queue=new int[data.length+1]; [x9KVd ^d
for(int i=0;i queue[++size]=data; |&FkksNAl\
fixUp(size); wQe_vY
} Pa~)"u8
} ~(Q)"s\1I
`Jzp Sw
private int size=0; @&X|5p"[g
-7S g62THS
private int[] queue; Ezr:1 GJ
/lo2y?CS*
public int get() { UD8op]>L
return queue[1]; xZ6~Ma2z
} vH#huZA?7
g=;%
public void remove() { |2abmuR0
SortUtil.swap(queue,1,size--); ?,& tNP{jq
fixDown(1); w*oeK
} n}'=yItVL1
file://fixdown >N]7IU[-
private void fixDown(int k) { W0l,cOOZJ
int j; TMig-y*[
while ((j = k << 1) <= size) { poToeagZ~Q
if (j < size %26amp;%26amp; queue[j] j++; w,h`s.AN
if (queue[k]>queue[j]) file://不用交换 JKGc3j,+#
break; Vm3v-=6
SortUtil.swap(queue,j,k); rd9e \%A
k = j; =K6($|'=
} XzIl`eH
} *.!Np9l,V
private void fixUp(int k) { Fxm$9(Y
while (k > 1) { 1UE6 4Kl:S
int j = k >> 1; dYL"h.x
if (queue[j]>queue[k]) (+B5|_xQu
break; =>M^02"
SortUtil.swap(queue,j,k); S"xKL{5
k = j; R:#k%}W
} +R|z{M)*
} ; mZW{j
!4^C #{$
} m^bNuo
8P1=[i]
} *T5!{
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SortUtil： UPG9)aF
DP3PYJ%+B
package org.rut.util.algorithm; BDR.AZ
8xccp4
import org.rut.util.algorithm.support.BubbleSort; i(>4wK!!
import org.rut.util.algorithm.support.HeapSort; ;*:Pw?'
import org.rut.util.algorithm.support.ImprovedMergeSort; R'C2o]
import org.rut.util.algorithm.support.ImprovedQuickSort; eD*A)
import org.rut.util.algorithm.support.InsertSort; P;Ga4Q.
import org.rut.util.algorithm.support.MergeSort; #MRMNL@
import org.rut.util.algorithm.support.QuickSort; )pq;*~IBI
import org.rut.util.algorithm.support.SelectionSort; f' 3q(a<p
import org.rut.util.algorithm.support.ShellSort; SV2M+5#;
Of4^?` ^
/** "x3lQ
* @author treeroot )XYv}U
* @since 2006-2-2 cVv;Jn
* @version 1.0 p$PKa.Y3
*/ X)7x<?DAy
public class SortUtil { 0l-Ef1
public final static int INSERT = 1; JV]^zW
public final static int BUBBLE = 2; OH">b6>\
public final static int SELECTION = 3; ?XA2&
public final static int SHELL = 4; Z yE `/J'
public final static int QUICK = 5; DV<` K$ET
public final static int IMPROVED_QUICK = 6; cd$m25CxC
public final static int MERGE = 7; a{ ?`t|
public final static int IMPROVED_MERGE = 8; {TX]\ufG
public final static int HEAP = 9; z7Q?D^miy
NhaI<J
public static void sort(int[] data) { NiU2@zgl
sort(data, IMPROVED_QUICK); ]%?YZn<{
} G>1eFBh }
private static String[] name={ FW/W%^
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" STxKE %l
}; 9J9)AV
fjs [f'L
private static Sort[] impl=new Sort[]{ Q\ U:~g3
new InsertSort(), iZaI_\"__
new BubbleSort(), !f&Kf,#b`
new SelectionSort(), b\-&sM(W"
new ShellSort(), QA5QweL
new QuickSort(), HN&Z2v
new ImprovedQuickSort(), Aq0S-HKF
new MergeSort(), >rJnayLF
new ImprovedMergeSort(), S$Q8>u6Wk
new HeapSort() v?& -xH-S
}; %jJ>x3$F
gG-BVl"59
public static String toString(int algorithm){ +eFFSt
return name[algorithm-1]; V>A.iim
} -Xxqm%([71
pXJpK@z
public static void sort(int[] data, int algorithm) { n#wI@W>%+
impl[algorithm-1].sort(data); ;uwRyd
} iy14mh\ ~
rld67'KcE
public static interface Sort { b0Kc^uj5
public void sort(int[] data); m6',SY9T
} ^!9~Nwn
Cb9;QzBVA#
public static void swap(int[] data, int i, int j) { vfq%H(
int temp = data; HA2k[F@3^
data = data[j]; 34d3g
data[j] = temp; l,,>& F
} pBETA'fY
} JWMpPzs