[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; M8FC-zFs
} DCSTp2
int i1=l; `hU2Ss~
int i2=mid+1; gvxOo#8]
for(int cur=l;cur<=r;cur++){ S%Z2J)H"
if(i1==mid+1) nN[QUg
data[cur]=temp[i2++]; `u;4Z2Lr0
else if(i2>r) dJmr!bN\;
data[cur]=temp[i1++]; gBXbB9
else if(temp[i1] data[cur]=temp[i1++]; Gii1|pLZ1
else x.U:v20`
data[cur]=temp[i2++]; w"E.Va
} ?)/&tk9.n
} 82=>I*0Q
mH4Jl1S&
} 59a7%w
Jn1(-
改进后的归并排序: vnv:YQV/ir
p=f8A71
package org.rut.util.algorithm.support; _^]:tL6
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import org.rut.util.algorithm.SortUtil; XZpF<7l
%4h$/~
/** Ky[-ZQQo=5
* @author treeroot <cR]-Yr~
* @since 2006-2-2 *W1:AGpz
* @version 1.0 e5m-7{h@
*/ d@<~u,Mt&F
public class ImprovedMergeSort implements SortUtil.Sort { DI:"+KMq{
!}&f2!?.W
private static final int THRESHOLD = 10; ^36m$J$
6^Ax3#q
/* IdL~0;W7
* (non-Javadoc) ,Je9]XT
* Cn8w})B
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) (>gHfC>(lq
*/ 7E)*]7B%
public void sort(int[] data) { { daEKac5
int[] temp=new int[data.length]; <0^L L
mergeSort(data,temp,0,data.length-1); X&bnyo P
} DzK%$#{<
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private void mergeSort(int[] data, int[] temp, int l, int r) { An3%@;
int i, j, k; 9]*hP](
int mid = (l + r) / 2; Bpl(s+
if (l == r) (n~GKcA
return; t3FfPV!P"
if ((mid - l) >= THRESHOLD) aEC&#Q(]q
mergeSort(data, temp, l, mid); L[p[m~HjG^
else Eza B}BLQ9
insertSort(data, l, mid - l + 1); CB%O8d #
if ((r - mid) > THRESHOLD) ;,jms~ik
mergeSort(data, temp, mid + 1, r); $@4(Lq1.
else uSn<]OrZo`
insertSort(data, mid + 1, r - mid); <S`N9a
$_0~Jzt,
for (i = l; i <= mid; i++) { K6; sxF
temp = data; 9A9yZlt
} YWUCrnr
for (j = 1; j <= r - mid; j++) { '/H+
temp[r - j + 1] = data[j + mid]; |a[Id
} Cdbh7
int a = temp[l]; #~>ykuq
int b = temp[r]; KZt4 dr
for (i = l, j = r, k = l; k <= r; k++) { }6^d/nE*T
if (a < b) { [%yCnt
data[k] = temp[i++]; 58.b@@T
a = temp; ,aQ{
} else { XCU>b[Cj,
data[k] = temp[j--]; (cEjC`]
b = temp[j]; QGQ}I
} uf&Ke k,
} K trR+:
} 0 P-eC|0
C%\.
/** 0!!z'm3
* @param data vd}Y$X
* @param l I~P]_DmM
* @param i BjyGk+A
*/ 1me16 5y<B
private void insertSort(int[] data, int start, int len) { *wVWyC
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); f6-OR]R5
} ,Z6\%:/
} d%='W|i\p&
} NT<>LWo
} is [p7-
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堆排序： %I6c}*W
jV!9IK;HA.
package org.rut.util.algorithm.support; %nkP?gn"a
h TY7`m">
import org.rut.util.algorithm.SortUtil; i*g>j <`
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/** b"C1
* @author treeroot ?#rejA:
* @since 2006-2-2 mU3 @|a/@0
* @version 1.0 ,8MUTXd@ V
*/ LU7d\Ch
public class HeapSort implements SortUtil.Sort{ z7'C;I
1'{A,!
/* (non-Javadoc) BVk&TGa;[$
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) yG<`7v
*/ n_X)6 s
public void sort(int[] data) { vuE 1(CR
MaxHeap h=new MaxHeap(); U4hFPK<
h.init(data); %Vp'^,&S
for(int i=0;i h.remove(); |Q)c{9sD
System.arraycopy(h.queue,1,data,0,data.length); l;C00ZBOc
} &6mXsx$
M@b:~mI[sw
private static class MaxHeap{ J$X{4
{"x8q
void init(int[] data){ K~B@8az
this.queue=new int[data.length+1]; I"<ACM
for(int i=0;i queue[++size]=data; -*I Dzm
fixUp(size); ;j]-;wg-;
} & NO:S
} p%+uv\Ix
`swf~
private int size=0; =6N%;2`84
N4JJA+
private int[] queue; {BA1C (
K4\#b}P!
public int get() { "}(g3Iy
return queue[1]; k;bdzcMkQ
} z|:3,$~sN
j~@Hj$APa`
public void remove() { IyfhVk?
SortUtil.swap(queue,1,size--); R!8qkG
fixDown(1); / .ddx<
} !C$bOhc
file://fixdown E 9LKVs}
private void fixDown(int k) { D[5Qd)PIL
int j; DiLZ5^`]
while ((j = k << 1) <= size) { [aF^D;o
if (j < size %26amp;%26amp; queue[j] j++; mDT"%I"4j
if (queue[k]>queue[j]) file://不用交换 <:rbK9MIl
break; !b0ANIp
SortUtil.swap(queue,j,k); U)n+j}vi
k = j; 1>BY:xZr
} ^mA^7jB
} np#RBy
private void fixUp(int k) { &2EimP
while (k > 1) { k15B5
int j = k >> 1; ;n)9
if (queue[j]>queue[k]) d/fg
break; n\ yDMY
SortUtil.swap(queue,j,k); zFn-VEJ)
k = j; @FBlF$vG
} 5A~lu4-q
} HoIK^t~VT#
TC%ENxDR
} %xq/eC7
{xzs{)9|Y4
} yp}a&Dg
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SortUtil： +l "z
v7ShXX:
package org.rut.util.algorithm; OcBKn=8
|H LU5=Y
import org.rut.util.algorithm.support.BubbleSort; xKl!{A9$w
import org.rut.util.algorithm.support.HeapSort; C{r Sq
import org.rut.util.algorithm.support.ImprovedMergeSort; ,o3{?o]s
import org.rut.util.algorithm.support.ImprovedQuickSort; ;6T>p
import org.rut.util.algorithm.support.InsertSort; $Z!$E,@c
import org.rut.util.algorithm.support.MergeSort; ve [*t`
import org.rut.util.algorithm.support.QuickSort; GRt1]%l#$
import org.rut.util.algorithm.support.SelectionSort; <]jKpJ{3N
import org.rut.util.algorithm.support.ShellSort; #@*;Y(9Ol
X \1grM
/** EO<{Bj=2
* @author treeroot ^HYrJr$y
* @since 2006-2-2 yv@td+-"D
* @version 1.0 sSM^net0
*/ <u'q._m
public class SortUtil { Y2)2 tzr]
public final static int INSERT = 1; U49#?^?
public final static int BUBBLE = 2; Y]ZNAR
public final static int SELECTION = 3; TbY<(wrMZ
public final static int SHELL = 4; ac-R q.GQY
public final static int QUICK = 5; VhWF(*
public final static int IMPROVED_QUICK = 6; 5V|D%t2N
public final static int MERGE = 7; <)vjoRv
public final static int IMPROVED_MERGE = 8; Z;nbnRz
public final static int HEAP = 9; `H_.<``>
P2q'P&
public static void sort(int[] data) { `pHlGbrW
sort(data, IMPROVED_QUICK); nMniHB'
} uEK9
private static String[] name={ 4!%TY4bJ
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" HR/"Nwr
}; "o=*f/M
E7_)P>aS5
private static Sort[] impl=new Sort[]{ : " ([i"
new InsertSort(), b?p_mQKtZ
new BubbleSort(), @213KmB.
new SelectionSort(), IwE{Zvr
new ShellSort(), [%8t~zg
new QuickSort(), V8aLPJ0_
new ImprovedQuickSort(), eC9nOwp]xH
new MergeSort(), h;^H*Y&`
new ImprovedMergeSort(), 2W}f|\8MX
new HeapSort() M7\; Y
}; 7nzNBtk
cVg!"
public static String toString(int algorithm){ `eF&|3!IYQ
return name[algorithm-1]; A[/_}bI|
} 9{{|P=
x"n!nT%Z
public static void sort(int[] data, int algorithm) { aetK<9L$
impl[algorithm-1].sort(data); A@-A_=a,
} YkPc&&#
MQ9Nn|4
public static interface Sort { (Hr_gkGtM
public void sort(int[] data); Mn-f
} Qj?qWVapA
^* xhbM;
public static void swap(int[] data, int i, int j) { I$#B#w?!$r
int temp = data; YPjjSi:#
data = data[j]; RS$!TTeQ
data[j] = temp; 9^;)~ G
} \Bg;^6U
} ),G?f {`!