[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; J@oGAa%3)
} @@*->
int i1=l; 4adCMfP7.
int i2=mid+1; *wwLhweQ5W
for(int cur=l;cur<=r;cur++){ 9HLn_|yU
if(i1==mid+1) V8NJ0fF
data[cur]=temp[i2++]; 76c4~IG#
else if(i2>r) +AZ=nMgW
data[cur]=temp[i1++]; ,M>W)TSH
else if(temp[i1] data[cur]=temp[i1++]; 1#^[{XlAx
else Qf414 oW
data[cur]=temp[i2++]; DHbLS3-
} s+[_5n~
} q5BJsw
TIW6v4
} Ar'}#6
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改进后的归并排序: 1HN_
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package org.rut.util.algorithm.support; "ltvD\
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import org.rut.util.algorithm.SortUtil; `-\4Dx1!q
Z%`} `(
/** Q[i;IbY
* @author treeroot x~$P.X7(~
* @since 2006-2-2 9u1_L`+b
* @version 1.0 CHdw>/5
*/ ~r]ZD)
public class ImprovedMergeSort implements SortUtil.Sort { )3.udx
9'3bzhT$
private static final int THRESHOLD = 10; +DF<o U~
|}es+<P
/* -v&Q'a
* (non-Javadoc) MCurKT<pQ
* j~\\,fl=
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) )P[B!
*/ ({m["d
public void sort(int[] data) { YJuaQxs
int[] temp=new int[data.length]; kmy?`P10(z
mergeSort(data,temp,0,data.length-1); GL@s~_;T6
} K *{C:Y
=V"ags
private void mergeSort(int[] data, int[] temp, int l, int r) { /_*:
int i, j, k; |O+R%'z'<
int mid = (l + r) / 2; E5jK}1t4V
if (l == r) /Or76kE
return; y@~.b^?_u
if ((mid - l) >= THRESHOLD) `y;&M8.
mergeSort(data, temp, l, mid); ).9-=P HlX
else ;)83tx /
insertSort(data, l, mid - l + 1); 3Nr8H.u&q
if ((r - mid) > THRESHOLD) *gMuo6
mergeSort(data, temp, mid + 1, r); Y;e@`.(
else 56>Zqtp*
insertSort(data, mid + 1, r - mid); pP{b!1
e:AB!k^xp$
for (i = l; i <= mid; i++) { xE9^4-Px*
temp = data; FDbx"%A
} $ ohwBv3S
for (j = 1; j <= r - mid; j++) { ^dZ,Itho
temp[r - j + 1] = data[j + mid]; 5irewh'R
} >Eik>dQ a
int a = temp[l]; HjGT{o
int b = temp[r]; A7VF >{L./
for (i = l, j = r, k = l; k <= r; k++) { T>g1! -^
if (a < b) { a+A/l
data[k] = temp[i++]; BR*""/3`
a = temp; eP&K]#
} else { ;y=w :r\A
data[k] = temp[j--]; Oq*a4_R'YV
b = temp[j]; .NCQiQ
} aZ5qq+1x
} EQ?4?
} E4}MvV=
4d!&.Qo9
/** A~*Wr+pv
* @param data sFSrMI#R
* @param l O5_E"um
* @param i ovm*,La)g
*/ |1J "r.K
private void insertSort(int[] data, int start, int len) { ~i))Zc3,g\
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); m1\>v?=K
} T1n GBl\(
} *fSa8CV
} }mu8fm'
} dam.D.o"
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堆排序： `dEWP;#cp
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package org.rut.util.algorithm.support; /PPk p9H{
BAX])~_
import org.rut.util.algorithm.SortUtil; bTO$B2eh|
d`({z]W;
/** *'d5~dz=
* @author treeroot IdzF<>;W
* @since 2006-2-2 &bBp`h
* @version 1.0 h=`rZC
*/ lba*&j]w=
public class HeapSort implements SortUtil.Sort{ G`6U t
eC[g"Ef
/* (non-Javadoc) o|^0DYb
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) '?yZ,t
*/ }!n<L:njX
public void sort(int[] data) { {sX*SbJt
MaxHeap h=new MaxHeap(); J)'6 z
h.init(data); :JW~$4
for(int i=0;i h.remove(); O~'1)k>
System.arraycopy(h.queue,1,data,0,data.length); HFo}r~
} KC}B\~ +
S:Yo9~
private static class MaxHeap{ BOt\"N
/V7u0y
void init(int[] data){ 5wGyM10
this.queue=new int[data.length+1]; f}Uw%S=w,
for(int i=0;i queue[++size]=data; 8P5xRUkV
fixUp(size); "_?^uymw
} S'ikr
} QXXcJc~
c^Wm~"r
private int size=0; JXPn <
@o;m!CYB
private int[] queue; >x!N[N@G
(&njZdcb*
public int get() { 61jDI^:
return queue[1]; 6|_ S|N
} V#3VRh
T0tG1/O\
public void remove() { !Z4,UTu|Q
SortUtil.swap(queue,1,size--); ?$ YE
fixDown(1); qIb(uF@l"
} *}[@*
file://fixdown M~"]h:m&'v
private void fixDown(int k) { hrS/3c'<Z
int j; ~x4Y57
while ((j = k << 1) <= size) { jg%D G2
if (j < size %26amp;%26amp; queue[j] j++; XZKOBq B]
if (queue[k]>queue[j]) file://不用交换 ghms-.:b8
break; <<UlFE9"
SortUtil.swap(queue,j,k); k{@z87+&
k = j; Ch7eUTqA@
} JmY"Ja,&
} f kP WGd
private void fixUp(int k) { ~_S`zzcZy4
while (k > 1) { [FC%_R&&
int j = k >> 1; fl)Oto7
if (queue[j]>queue[k]) %>JqwMK
break; NugJjd56x
SortUtil.swap(queue,j,k); 4pc=MR
k = j; *YtITyDS3>
} 0_&oMPY
} `bH Eu"(,
4<LRa=XT$
} kkzXv`+
JVXBm]
} jkD5Z`D
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SortUtil： 6fkL@It
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package org.rut.util.algorithm; Ge97e/CY
2t(E+^~
import org.rut.util.algorithm.support.BubbleSort; > }:6m
import org.rut.util.algorithm.support.HeapSort; }F1^gN&QF
import org.rut.util.algorithm.support.ImprovedMergeSort; zA+^4/M
import org.rut.util.algorithm.support.ImprovedQuickSort; ?cpID8Z
import org.rut.util.algorithm.support.InsertSort; '4O1Y0K
import org.rut.util.algorithm.support.MergeSort; 3}N:oJI$z
import org.rut.util.algorithm.support.QuickSort; Kt`0vwkjvI
import org.rut.util.algorithm.support.SelectionSort; E~N}m7kTl/
import org.rut.util.algorithm.support.ShellSort; ^8fO3<Jg
T.K$a\/{,
/** ,u\M7,a^
* @author treeroot @Z|cUHo
* @since 2006-2-2 kB :")$
* @version 1.0 fE^rTUtn
*/ ){wE)NN
public class SortUtil { /8GVu7
public final static int INSERT = 1; $cK9E:v
public final static int BUBBLE = 2; gZvl D
public final static int SELECTION = 3; S B'.
public final static int SHELL = 4; 2QBq
public final static int QUICK = 5; j~L{=ojz%
public final static int IMPROVED_QUICK = 6; 43P?f+IYrk
public final static int MERGE = 7; YSZz4?9\
public final static int IMPROVED_MERGE = 8; Ymn0?$,D1=
public final static int HEAP = 9; y#T":jpR
*_^AK=i
public static void sort(int[] data) { nQ/El&{
sort(data, IMPROVED_QUICK); Sc*p7o: A
} 4Ly!:GH3T
private static String[] name={ -bE{yT)7
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" &JP-M=\n
}; LiN{^g^fx
wddF5EcK0
private static Sort[] impl=new Sort[]{ ? 8'4~1g`}
new InsertSort(), "lUw{3
new BubbleSort(), <k^h&1J#g
new SelectionSort(), ob0clJX
new ShellSort(), f PDnkr
new QuickSort(), *;4r|#LG
new ImprovedQuickSort(), uK t>6DN.
new MergeSort(), 6wxQ_Qz:Q
new ImprovedMergeSort(), Uh&MoIBs#
new HeapSort() Dj %jrtT
}; ?BLd~L+
kOkgsQQ
public static String toString(int algorithm){ r$0"Y-a
return name[algorithm-1]; H!vvdp?Z
} >Y[{m $-
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public static void sort(int[] data, int algorithm) { IY :iGn8R
impl[algorithm-1].sort(data); 9i9VDk{
} D^f;dT;-
k^ID
public static interface Sort { 3+(Fq5I
public void sort(int[] data); _-&Au%QNJ`
} RdvJA:;q
Zcdt\;HKr
public static void swap(int[] data, int i, int j) { w3B*%x)
int temp = data; E8)C_[QJ`
data = data[j]; s>_ne0
data[j] = temp; FIW*Nr
} dGHRHXi
} Ag}>gbz~G