[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; dDYor-g>
} : T4ap_Ycq
int i1=l; p8CaD4bE
int i2=mid+1; 3=Xvl 58k
for(int cur=l;cur<=r;cur++){ I=E\=UTG,5
if(i1==mid+1) ;$r!eFY;
data[cur]=temp[i2++]; Nw1 .x
else if(i2>r) U|+`Eth8(
data[cur]=temp[i1++]; ccW{88II7w
else if(temp[i1] data[cur]=temp[i1++]; li`
else p2GN93,u@P
data[cur]=temp[i2++]; q~\[P4m
} #KLW&A
} qm=9!jqC;
)qWO}]F
} xLbF9ASim
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改进后的归并排序: MA mjoH
1ww~!R
package org.rut.util.algorithm.support; XQ Si
X=k|SayE8
import org.rut.util.algorithm.SortUtil; *; 6LX
[}l 1`>
/** 8L))@SA+uJ
* @author treeroot .6i +_B|
* @since 2006-2-2 NCx)zJ\S
* @version 1.0 ^X*l&R_=R
*/ )B^T7{
public class ImprovedMergeSort implements SortUtil.Sort { K!G/iz9SB
Kku@!lv
private static final int THRESHOLD = 10; wD<W'K
f./j%R@
/* cn ;2&
* (non-Javadoc) ;sSRv9Xb
* *^%ohCUi
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) %G]WOq=q
*/ `]2y=f<{X
public void sort(int[] data) { < $rXQ
int[] temp=new int[data.length]; J\ ?
mergeSort(data,temp,0,data.length-1); LC/%AbM
} q[.,i{2R}
*_uGzGB&G
private void mergeSort(int[] data, int[] temp, int l, int r) { `$VnB
int i, j, k; qS[nf>"
int mid = (l + r) / 2; ,5|@vW2@u
if (l == r) 8rjiW#
return; |=Pw-uk
if ((mid - l) >= THRESHOLD) Xu[A,6
mergeSort(data, temp, l, mid); o l+*Oe
else Oyjhc<6
insertSort(data, l, mid - l + 1); .ffb*gZ4
if ((r - mid) > THRESHOLD) W%}zwQ
mergeSort(data, temp, mid + 1, r); YR~)07
else sTYA
insertSort(data, mid + 1, r - mid); <(o) * Zmo
z`y^o*qc]
for (i = l; i <= mid; i++) { yLvU@V@~
temp = data; /3 ;t &]
} #$-`+P
for (j = 1; j <= r - mid; j++) { H[iR8<rhQ
temp[r - j + 1] = data[j + mid]; KQrG|<J
} !*-|s}e
int a = temp[l]; Jpo(O>\P
int b = temp[r]; NFb<fD[C
for (i = l, j = r, k = l; k <= r; k++) { %t,Fxj4F
if (a < b) { AhSN'gWpbF
data[k] = temp[i++]; Dn.%+im-u
a = temp; Y X{F$BM
} else { =&?BPhJE
data[k] = temp[j--]; zO)3MC7l*
b = temp[j]; )L7h:%h#
} h!]=)7x;
} i}LVBx"K(
} $%3%&+z$I
\w@ "`!%
/** (, uW-
* @param data >o!~T}J7
* @param l J?bx<$C@
* @param i CF@j]I@{
*/ 8}!WJ2[R
private void insertSort(int[] data, int start, int len) { 'di(5
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Eg#WR&Uq"
} hW-?j&yJ?
} e:RgCDWL
} XRWy#Pj
} agPTY{;
!&vPG>V
堆排序： (%iCP/E3
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package org.rut.util.algorithm.support; i(n BXV{
&\M<>>IB
import org.rut.util.algorithm.SortUtil; Zm/I&
Gmh6|Dsg
/** 2lRE+_qz
* @author treeroot 7,Q>>%/0P
* @since 2006-2-2 =$Sd2UD
* @version 1.0 Q)\4 .d
*/ p6W|4_a?
public class HeapSort implements SortUtil.Sort{ `-82u :"
J0x)NnWJ
/* (non-Javadoc) Meo. V|1
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) /~;om\7r
*/ pK@8=+
public void sort(int[] data) { i}r|Zo
MaxHeap h=new MaxHeap(); ORo,.#<
h.init(data); (<xl _L:*.
for(int i=0;i h.remove(); xr1,D5
System.arraycopy(h.queue,1,data,0,data.length); TKZ[H$Z
} 8iUj9r_
'P3jUc)
private static class MaxHeap{ z[0B"f
[$%O-_x
void init(int[] data){ ,ftKRq
this.queue=new int[data.length+1]; C{U"Nsu+1
for(int i=0;i queue[++size]=data; 'o]8UD(
fixUp(size); zP|^) h5
} Y4I;-&d's
} 58o'Q
qjmlwVw
private int size=0; tkKiuh?m
xy[aZr
private int[] queue; K+@R [
Q6rvTV'vv
public int get() { Ni-@El99
return queue[1]; wOs t).
} I7e.pm
D $3Mg
public void remove() { 6$A>%Jtwe
SortUtil.swap(queue,1,size--); "TP^:Ln
fixDown(1); GEUC<bL+
} S<UWv@`U"
file://fixdown Z2D^]
private void fixDown(int k) { @PAT|6
int j; 2*ByVK
while ((j = k << 1) <= size) { ;HoBLxb P
if (j < size %26amp;%26amp; queue[j] j++; .l$:0a
if (queue[k]>queue[j]) file://不用交换 h0)Dj(C
break; k}FmdaPI'
SortUtil.swap(queue,j,k); I::|d,bR!
k = j; ]YWz;Z
} JBt2R=
} H[D<G9:
private void fixUp(int k) { cZlDdr%
while (k > 1) { aGq1YOD[$
int j = k >> 1; q1?}G5a?
if (queue[j]>queue[k]) :B 9>
break; p;n"zr8U
SortUtil.swap(queue,j,k); 2v?fbrC5c
k = j; {Bw
} (rm*KD"]
} M2lvD&
FE,BvNBZ
} !N'HL-oT
Z|$M 9E
} x ?24oO
1U6z2i+y
SortUtil： _kXq0~
K$/&C:,Q
package org.rut.util.algorithm; &$g{i:)Z
;7E c'nC4
import org.rut.util.algorithm.support.BubbleSort; 2xK v;
import org.rut.util.algorithm.support.HeapSort; V;29ieE!
import org.rut.util.algorithm.support.ImprovedMergeSort; 3>QkO.b
import org.rut.util.algorithm.support.ImprovedQuickSort; @A'@%Zv-
import org.rut.util.algorithm.support.InsertSort; 'M!M$<j
import org.rut.util.algorithm.support.MergeSort; Lz{z~xNHW.
import org.rut.util.algorithm.support.QuickSort; aI;-NnC
import org.rut.util.algorithm.support.SelectionSort; ^xm%~
import org.rut.util.algorithm.support.ShellSort; Mqv[7.|
h0a|R4J
/** D0^h;wJ=4+
* @author treeroot /odDJxJ k
* @since 2006-2-2 *WaqNMD[%
* @version 1.0 N>xdX5
*/ j9xu21'!%
public class SortUtil { )k.}>0K |
public final static int INSERT = 1; zd|n!3;
public final static int BUBBLE = 2; 5y8VA4L/o
public final static int SELECTION = 3; c*.-mS~Z`
public final static int SHELL = 4; @L$!hTaP
public final static int QUICK = 5; dVe,;?+A
public final static int IMPROVED_QUICK = 6; Q>(a JF
public final static int MERGE = 7; QtQbr*q@%
public final static int IMPROVED_MERGE = 8; =}zSj64
public final static int HEAP = 9; 5Ky(C6E$s
* o{7 a$V
public static void sort(int[] data) { /]oQqZHv
sort(data, IMPROVED_QUICK); e2^TQv2(=e
} %'OY
private static String[] name={ _Wqy,L;J
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ;2P
}; KX J7\}
2F :8=_sA
private static Sort[] impl=new Sort[]{ gCq'#G\Z
new InsertSort(), T>68 ,; p
new BubbleSort(), ^!fY~(=U4
new SelectionSort(), 6=:s3I^
new ShellSort(), @;\0cEn>
new QuickSort(), Q_>W!)p Gz
new ImprovedQuickSort(), R,ZG?/#uM9
new MergeSort(), k(he<-GF\
new ImprovedMergeSort(), jn(%v]
new HeapSort() F1meftK
}; N "}N>xe2
J6Vx7
public static String toString(int algorithm){ s'|t2`K("
return name[algorithm-1]; !<24Cy
} $*|M+ofQ
cj9C6Y!
public static void sort(int[] data, int algorithm) { 2Qt!JXC
impl[algorithm-1].sort(data); ~7anj.
} >x>/}`
9dmoB_G
public static interface Sort { 1YK(oRSDn
public void sort(int[] data); [5!dO\-[
} J$5Vjh'aM
=f!clhO
public static void swap(int[] data, int i, int j) { YjH~8==
int temp = data; >,[@SF%
data = data[j]; q=}1ud}1
data[j] = temp; DD2K>1A1
} TJ1h[
} Wy%FF\D.Y