[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; x}twsc`
} [V 8{b{
int i1=l; q%5eVG
int i2=mid+1; iX\W;V
for(int cur=l;cur<=r;cur++){ eznypY=
if(i1==mid+1) 2<hpK!R
data[cur]=temp[i2++]; h!m_PgRSs
else if(i2>r) mR;qMX)0h
data[cur]=temp[i1++]; @zgdq
else if(temp[i1] data[cur]=temp[i1++]; SwU\ q]^|Z
else \(">K
data[cur]=temp[i2++]; {Ha8]y
} >><.3
} ]QuM<ms
=~I-]4
} !d&C>7nb
.SWt3|Pi5
改进后的归并排序: 2y%,p{="
fBQ?|~:n
package org.rut.util.algorithm.support; >Yt/]ta4+
Pf F=m'
import org.rut.util.algorithm.SortUtil; ,TRTRb;
$#|gLVOQ
/** .%zy`n
* @author treeroot GQ_p-/p R
* @since 2006-2-2 \cLSf=
* @version 1.0 0<TD/1wN
*/ GHQ;hN:
public class ImprovedMergeSort implements SortUtil.Sort { kPjd_8z2n
QORN9SY
private static final int THRESHOLD = 10; r_YIpnJ
S!{t6'8K
/* _sy'.Fo
* (non-Javadoc) KFZm`,+69
* ?b!Fa
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) <|?K%FP7Z
*/ Y4IGDY*
public void sort(int[] data) { 5 |/9}^T
int[] temp=new int[data.length]; ip~$X2
mergeSort(data,temp,0,data.length-1); KgW:@X7wvM
} "KJ%|pg_C
K 0hu:1l)
private void mergeSort(int[] data, int[] temp, int l, int r) { mA7m
int i, j, k; 3Oa*%kP+
int mid = (l + r) / 2; @/&b;s73
if (l == r) ESoAzo,u
return; {iG@U=>
if ((mid - l) >= THRESHOLD) 3zT_^;:L
mergeSort(data, temp, l, mid); |;A/|F0-e
else VzJ5.mRQ
insertSort(data, l, mid - l + 1); U4G}DCU
if ((r - mid) > THRESHOLD) H[b}kZW:a
mergeSort(data, temp, mid + 1, r); c)&>$S8*
else `Bn=?9
insertSort(data, mid + 1, r - mid); ,^8MB.
NU(AEfF
for (i = l; i <= mid; i++) { BGr.yEy
temp = data; "g+z !4b#
} @u._"/K
for (j = 1; j <= r - mid; j++) { *1@:'rJ
temp[r - j + 1] = data[j + mid]; { BEo &
} eh R{X7J
int a = temp[l]; A>VX*xd
int b = temp[r]; .qob_dRA
for (i = l, j = r, k = l; k <= r; k++) { EVQ0l@K
if (a < b) { tvd0R$5}
data[k] = temp[i++]; vEQ<A<[Z
a = temp; g+PPW88P;
} else { TEsnNi 1
data[k] = temp[j--]; D7"p}PD>~
b = temp[j]; [i]r-|_K
} \C5%\4
} dd|W@Xp -
} Iak0 [6Ey
x7T+>
/** 6Fy@s
* @param data Y\v-,xPm
* @param l @DC)]C2
* @param i D5?phyC[Z
*/ [@fz1{*
private void insertSort(int[] data, int start, int len) { wNE$6
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); A-CUv[pM
} V[a[i>,Z
} s=Q(C[%I
} /(t sb
} irTv4ZE'+l
M2@^bB\J
堆排序： _~aG|mAj
S'B6jJK2x
package org.rut.util.algorithm.support; xv7"WFb
;3C:%!CdA]
import org.rut.util.algorithm.SortUtil; ;7Oi!BC
TFDm5XJ
/** Kt#,]]
* @author treeroot DG;y6#|p
* @since 2006-2-2 2>em0{e
* @version 1.0 6k?`:QK/sl
*/ >NV=LOO
public class HeapSort implements SortUtil.Sort{ %~*jae!f
P%X-@0)
/* (non-Javadoc) oojiJ~
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 5(&xNT-n8
*/ F=)eLE{W
public void sort(int[] data) { HI&kP+,y
MaxHeap h=new MaxHeap(); R|!B,b(
h.init(data); xn}BB}s{t
for(int i=0;i h.remove(); *@ED}Mj+
System.arraycopy(h.queue,1,data,0,data.length); u}6v?!
} w?csV8ot
!p 8psi0
private static class MaxHeap{ ;LJ3c7$@lf
t^EhE
void init(int[] data){ d`Q7"}uZ
this.queue=new int[data.length+1]; wb"RB A9
for(int i=0;i queue[++size]=data; > 7`&0?
fixUp(size); f"&Xr!b.h
} /&ygiH{^
} }fhHXGK.
0'$p$K
private int size=0; 3}&ZOO
UEzi*"-v2
private int[] queue; !d9AG|
9>,Qgp,w
public int get() { >{Rb 3Z]
return queue[1]; &d`^E6#
} m(sXk}e;1
xk~Nmb}
public void remove() { <M[U#Q~?~e
SortUtil.swap(queue,1,size--); $M"0BZQ?y!
fixDown(1); O2-M1sd$
} kReG:
file://fixdown G5]1s
private void fixDown(int k) { KO]N%]:&~
int j; /c+)C"
while ((j = k << 1) <= size) { .6T6 S v
if (j < size %26amp;%26amp; queue[j] j++; %hT4qzJj
if (queue[k]>queue[j]) file://不用交换 zREJ#r
break; k ~6-cx
SortUtil.swap(queue,j,k); 9(VRq^Z1
k = j; BH:
} r>qA $zD^
} _LfHs1g4
private void fixUp(int k) { I6OSC&A`
while (k > 1) { CdhSp$>
int j = k >> 1; JE%A|R<Jl
if (queue[j]>queue[k]) ?p8k{N(1
break; r!/0 j)
SortUtil.swap(queue,j,k); nx4P^PC
k = j; P0\eBS
} {^RG% &S
} w4MwD?i]R
Nh)[rx
} ekzjF\!y
Go+[uY^
} }_46y*o8
I 8Y*@$h
SortUtil： -Fwh3F4g
<Dw]yGK@
package org.rut.util.algorithm; 6`puTL?
+ Oobb-v
import org.rut.util.algorithm.support.BubbleSort; QXk"?yT`E
import org.rut.util.algorithm.support.HeapSort; u2qV6/
import org.rut.util.algorithm.support.ImprovedMergeSort; P%o44|[][
import org.rut.util.algorithm.support.ImprovedQuickSort; c"Y!$'|Q
import org.rut.util.algorithm.support.InsertSort; h$h]%y
import org.rut.util.algorithm.support.MergeSort; sj9D
import org.rut.util.algorithm.support.QuickSort; Da,&+fZI!
import org.rut.util.algorithm.support.SelectionSort; r*cjOrvI
import org.rut.util.algorithm.support.ShellSort; UxPGv;F
Q&+c.S
/** V;[p438o
* @author treeroot Lk(S2$)*
* @since 2006-2-2 2bA#D%PHD
* @version 1.0 zv%J=N$G
*/ ZzL@[g
public class SortUtil { E#h~V5Tf
public final static int INSERT = 1; .Dv=pB,u
public final static int BUBBLE = 2; 3&J&^O
public final static int SELECTION = 3; ?6:cNdN
public final static int SHELL = 4; Fd!iQ
public final static int QUICK = 5; >rRf9wO1l
public final static int IMPROVED_QUICK = 6; NV!4(_~
public final static int MERGE = 7; Hhf72IX
public final static int IMPROVED_MERGE = 8; Wu{&;$
public final static int HEAP = 9; =WRO\lgv.
3hJH(ToO
public static void sort(int[] data) { Dt {')
sort(data, IMPROVED_QUICK); k&DGJ5m$.
} ;nf&c;D
private static String[] name={ ]%XK)[:5_=
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" y\_wWE
}; -lp"#^ ;
+2O=s<fp
private static Sort[] impl=new Sort[]{ MuSaK %
new InsertSort(), Es:6
new BubbleSort(), z_(eQP])
new SelectionSort(), /oDpgOn
new ShellSort(), v!!;js^
new QuickSort(), "8t\MKt(
new ImprovedQuickSort(), J8h7e}n?
new MergeSort(), B "n`|;r5
new ImprovedMergeSort(), rU*q@y Px
new HeapSort() 9UmBm#"
}; >x?2Fz.
\L#QR
public static String toString(int algorithm){ }*-u$=2
return name[algorithm-1]; 5vGioO
} Riq|w+Q
xK!DtRzsA
public static void sort(int[] data, int algorithm) { C"9"{
impl[algorithm-1].sort(data); Mryn>b`cB
} : ~'Z(-a
S2}Z&X(
public static interface Sort { ZV#$Z
public void sort(int[] data); 4@~a<P#
} afy/K'~
n'3u]~7^
public static void swap(int[] data, int i, int j) { }MjQP R
int temp = data; O"QHb|j
data = data[j]; SauHFl8?
data[j] = temp; zkG>u,B}
} 3*2I$e!Jt
} GRQ_+K