[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; |A/)b78'u
} >0c4C<_
int i1=l; @b]?Gg
int i2=mid+1; 9vL n#_
for(int cur=l;cur<=r;cur++){ z]d2 rzV(_
if(i1==mid+1) Nk ~"f5q7
data[cur]=temp[i2++]; +3wVcL
else if(i2>r) 6jaol'{SuH
data[cur]=temp[i1++]; Uja`{uc
else if(temp[i1] data[cur]=temp[i1++]; lKT<aYX
else xsN)a!
data[cur]=temp[i2++]; 9*b(\Z)N
} p*ic@n*G
} rAwuWM@BIg
%V;B{?>9zB
} A@81wv
;&$Nn'~a
改进后的归并排序: $kD;*v=
S#[w).7
package org.rut.util.algorithm.support; ^6kE tTO*
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import org.rut.util.algorithm.SortUtil; }:zTz%_K
a?K3/0G
/** ZOIx+%/Vd#
* @author treeroot O86[`,
* @since 2006-2-2 %xuJQuCqf
* @version 1.0 i"Z
*/ z7$,m#tw
public class ImprovedMergeSort implements SortUtil.Sort { c7R<5f
r&0IhE
private static final int THRESHOLD = 10; W[4 V#&Z
|Ym3.hz
/* tA{B~>
* (non-Javadoc) 8}_M1w6v
* ymo].
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) )Bo]+\2
*/ :41Ch^\E
public void sort(int[] data) { +`]AutNv
int[] temp=new int[data.length]; #*|Gp_l+%
mergeSort(data,temp,0,data.length-1); +5xVgIk#
} "'@>cJ=
8nKb mjM
private void mergeSort(int[] data, int[] temp, int l, int r) { >"?jW@|g
int i, j, k; >\s8S}p
int mid = (l + r) / 2; U9/6F8D1Y1
if (l == r) p?idl`?^3
return; ih\=mB
if ((mid - l) >= THRESHOLD) ra]lC7<H
mergeSort(data, temp, l, mid); 15dbM/Gj
else 79MF;>=tV
insertSort(data, l, mid - l + 1); Gw@]w;ed
if ((r - mid) > THRESHOLD) -:~"c@D
mergeSort(data, temp, mid + 1, r); MIx,#]C&
else ]mZN18#
insertSort(data, mid + 1, r - mid); \&#IK9x{
:rzq[J^
for (i = l; i <= mid; i++) { hgPzx@
temp = data; glI4Jb_[
} s1kG:h2|$
for (j = 1; j <= r - mid; j++) { C;jV)hr6P
temp[r - j + 1] = data[j + mid]; S( Vssi|y
} QXLHQ_V
int a = temp[l]; zNRR('B?
int b = temp[r]; HpGI\s
for (i = l, j = r, k = l; k <= r; k++) { Zv|TvlyT"
if (a < b) { Uw5AHq).
data[k] = temp[i++]; =6H
a = temp; EgB$y"fs
} else { <l!{j?Kx
data[k] = temp[j--]; FhJtiw@
b = temp[j]; bg/a5$t
} |SSe n#PYp
} !E.CpfaC
} t;/s^-}
b-Xc6f
/** J*nWCL
* @param data 1ww#]p`1
* @param l I;GbS`
* @param i E=$li
*/ Mo4k6@ht_
private void insertSort(int[] data, int start, int len) { D@?Tq,= [
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ApSzkPv*
} zkb[u"
} mO8E-D*3
} 3!qp+i)?
} `&w{-om\
U@:h';.
堆排序： Q4e+vBECkq
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package org.rut.util.algorithm.support; \6L,jSoBl
X')t6DQ(I
import org.rut.util.algorithm.SortUtil; }BN!Xa
0 P2lq
/** P+<4w
* @author treeroot pSKwXx
* @since 2006-2-2 g|=1U
* @version 1.0 0i4XS*vPv
*/ .g?Ppma
public class HeapSort implements SortUtil.Sort{ ~v|NC([(
-I'Jm=q3]
/* (non-Javadoc) )l6(ss!J
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) {YMO8
*/ ,vs#(d6G
public void sort(int[] data) { hq*"S-N
MaxHeap h=new MaxHeap(); ,*m{Q
h.init(data); PUbfQg
for(int i=0;i h.remove(); PfjD!=yS=h
System.arraycopy(h.queue,1,data,0,data.length); Y{7)$'At
} mPJ@hr%3
s0\}Q=s[
private static class MaxHeap{ =Ohro'
T o$D[-
void init(int[] data){ vf0 fa46
this.queue=new int[data.length+1]; c@|f'V4
for(int i=0;i queue[++size]=data; )zAATBb4.
fixUp(size); &hu3A)%
} ,R[<+!RS
} 6(8zt"E
ZO8r8 [
private int size=0; 'BX U'
D $&6 8
private int[] queue; .g>0FP
XE($t2x,M
public int get() { W4&Itj
return queue[1]; I''X\/|
} Vi<6i0
MHQM'
public void remove() { ZfVw33z
SortUtil.swap(queue,1,size--); OfPv'rW{x
fixDown(1); ;U[W $w[
} 7-("ppYX=
file://fixdown @d_9NOmNT
private void fixDown(int k) { QP7N#mh
int j; G]RFGwGt
while ((j = k << 1) <= size) { -7u_\XFk
if (j < size %26amp;%26amp; queue[j] j++; -Ic<.ix
if (queue[k]>queue[j]) file://不用交换 -GZ:}<W6+
break; 4Ul*`/d
SortUtil.swap(queue,j,k); nj=nSD
k = j; k2:mIp\
} OLE@35"v]
} ;T3}#Q*qC
private void fixUp(int k) { aE[:9{<|
while (k > 1) { kJ"}JRA<
int j = k >> 1; 4vyJ<b
if (queue[j]>queue[k]) %TYe]^/'y
break; 1 EwCF
SortUtil.swap(queue,j,k); jhB+ ]
k = j; |\T!,~
} v(`5exWV
} of/' 9Tj
>uR;^B5m
} eCwR }m?_
51'{Jx8
} 9E2OCLWrE
/NUu^ N
SortUtil： %9b TfX"
!~`aEF3
package org.rut.util.algorithm; GzjC;+W
!laOiH
import org.rut.util.algorithm.support.BubbleSort; T)mh
import org.rut.util.algorithm.support.HeapSort; |vY|jaV}
import org.rut.util.algorithm.support.ImprovedMergeSort; :u|F>e
import org.rut.util.algorithm.support.ImprovedQuickSort; xV.UM8
import org.rut.util.algorithm.support.InsertSort; ?7dV:]%~2
import org.rut.util.algorithm.support.MergeSort; xcX^L84\
import org.rut.util.algorithm.support.QuickSort; 4%*`'o$_
import org.rut.util.algorithm.support.SelectionSort; ofuQ`g1hb
import org.rut.util.algorithm.support.ShellSort; UQO?hZ!y/.
+?^lnoX
/** 6.6x$y3v
* @author treeroot yX1OJg[s,
* @since 2006-2-2 <4Ik]Uz^
* @version 1.0 O#`y;%
*/ jBU!xCO
public class SortUtil { e_dsBmTh
public final static int INSERT = 1; Ns6CxE9
public final static int BUBBLE = 2; \9k{h08s
public final static int SELECTION = 3; Z&5cJk W
public final static int SHELL = 4; -)[~%n#X+t
public final static int QUICK = 5; 9&Ny;oy#6
public final static int IMPROVED_QUICK = 6; AME<V-5
public final static int MERGE = 7; T;#:Y
public final static int IMPROVED_MERGE = 8; FB n . 4
public final static int HEAP = 9; Am=O-; b'8
I 8 Ls_$[
public static void sort(int[] data) { LsaRw-4.c
sort(data, IMPROVED_QUICK); }0 =gP?.kE
} gsVm)mkd
private static String[] name={ 5](,N^u{):
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Ae'N1V
}; =|qYaXjT$
$O,IXA
private static Sort[] impl=new Sort[]{ 7%yP5c B
new InsertSort(), s=1w6ZLD
new BubbleSort(), w%eEj.MI|i
new SelectionSort(), (5>IF,}!L
new ShellSort(), 2YpJ4.
new QuickSort(), e89IT*
new ImprovedQuickSort(), 6&L8{P
new MergeSort(), G`NGt_C
new ImprovedMergeSort(), #.|MV}6rQ
new HeapSort() 7-c3^5gn{
}; X-_0wR
yTh60U
public static String toString(int algorithm){ +?uZ~VSl
return name[algorithm-1]; 5mg] su&#
} O>>%lr|
2x:aMWh
public static void sort(int[] data, int algorithm) { 9On(b|mT
impl[algorithm-1].sort(data); ICUI0/J
} ;w^{PZBg
H#B97IGT
public static interface Sort { P|;=dX#-
public void sort(int[] data); (z^987G
} J(kC
ZCDcf
public static void swap(int[] data, int i, int j) { e`;U9Z
int temp = data; &I?d(Z=:\
data = data[j]; kRB2J3Nt.
data[j] = temp; E7j9A`
} !\|L(Paf
} ;\gHFG}