[JAVA]用Java实现的各种排序

ヾ1.嗰rёn

级别: 终身会员

发帖: 3743

铜板: 8

人品值: 493

贡献值: 9

交易币: 0

好评度: 3746

信誉值: 0

金币: 0

所在楼道

只看楼主更多操作楼层直达

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; )H)HR`
} }psJ'aiG*
int i1=l; ^hU7QxW
int i2=mid+1; RK|C*TCnl
for(int cur=l;cur<=r;cur++){ m!g f!
if(i1==mid+1) lOql(ZH`w
data[cur]=temp[i2++]; Y6+nfh_
else if(i2>r) +g(QF
data[cur]=temp[i1++]; >xT8[
else if(temp[i1] data[cur]=temp[i1++]; -e30!A
else -|g~--@Q
data[cur]=temp[i2++]; 0C7x1:
} G"wy?
} 8dP^zjPj
yKi* 8N"e<
} ^dQ#\uy
$cnIsyKWY
改进后的归并排序: 60Y&)UR
gz8<&*2
package org.rut.util.algorithm.support; ;'*"(F=D6
@Kp2l<P
import org.rut.util.algorithm.SortUtil; kf';"
-r[l{ce
/** l9\ *G;
* @author treeroot t 7+ifSrz
* @since 2006-2-2 W]aX}>0
* @version 1.0 qiyX{J7Z
*/ lDU@Q(V#}<
public class ImprovedMergeSort implements SortUtil.Sort { .$s>b#mO
Osj/={7g
private static final int THRESHOLD = 10; ^?Y x{r~9
FVo_=O)
/* h,Nq:"}
* (non-Javadoc) ^ALR.N+<
* \|wUxijJ*,
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) <<iwJ U%:
*/ &}+^*X
public void sort(int[] data) { caC-JcDXy
int[] temp=new int[data.length]; {wS)M
mergeSort(data,temp,0,data.length-1); {zmh0c;|
} #CcC& I :c
i^I U)\
private void mergeSort(int[] data, int[] temp, int l, int r) { 6 h%%?
int i, j, k; ,JVWn>s
int mid = (l + r) / 2; '0MH-M
if (l == r) %.nZ@';.
return; gOSFvH8FU
if ((mid - l) >= THRESHOLD) !7fL'
mergeSort(data, temp, l, mid); ji] H|
else na)-'
insertSort(data, l, mid - l + 1); a%igc^GS2
if ((r - mid) > THRESHOLD) 9`8D Ga
mergeSort(data, temp, mid + 1, r); wiE'6CM
else tOEY|
insertSort(data, mid + 1, r - mid); %fH&UFby
%7vjYvo>
for (i = l; i <= mid; i++) { Jp#Onl+d6
temp = data; @5tW*:s
} s/cclFji]
for (j = 1; j <= r - mid; j++) { =IC cN|
temp[r - j + 1] = data[j + mid]; R/BW$4/E
} J.;{`U=:
int a = temp[l]; :@=;WB*0
int b = temp[r]; ijuIf9!
for (i = l, j = r, k = l; k <= r; k++) { >dU.ic?19
if (a < b) { z<h?WsL
data[k] = temp[i++]; k&M9Hn2
a = temp; _=*ph0nu
} else { O_bgrXg6x
data[k] = temp[j--]; 'Io2",~ M
b = temp[j]; *F)+- BB
} J4VyP["m
} 552U~t
} vk>EFm8l
=j&qat
/** !8ch&cr)o+
* @param data *ke9/hO1i
* @param l >x0)
* @param i ^W)h=49PN
*/ "u=U@1 ^
private void insertSort(int[] data, int start, int len) { b>_eD-
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); -z6{!
} e4rhB"qQdn
} }]K^b1Fs5
} Ee0}Xv
} `=FDNOwp
y'#i'0eeL
堆排序： PrwMR_-
-s5>GwZt
package org.rut.util.algorithm.support; 2"IsNbWV
~V`F5B
import org.rut.util.algorithm.SortUtil; N |nZf5{
898=9`7e
/** _W +
* @author treeroot Aav|N3
* @since 2006-2-2 ,2*x4Gycb
* @version 1.0 z!> H^v
*/ Z}NMDb:t
public class HeapSort implements SortUtil.Sort{ Dc;zgLLL
78n`VmH~L
/* (non-Javadoc) WJJwhr
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) L2P#5B!S
*/ *s[bq;$
public void sort(int[] data) { 4Y!_tZ>
MaxHeap h=new MaxHeap(); ;G\RGU~
h.init(data); @9ndr$t
for(int i=0;i h.remove(); PD$@.pib
System.arraycopy(h.queue,1,data,0,data.length); /GUbc
} s^6"qhTa
xTV3U9 v
private static class MaxHeap{ R.rxpJ+kU
W{js9$oJ
void init(int[] data){ Z.x9SEe1t
this.queue=new int[data.length+1]; @Z{!T)#}j
for(int i=0;i queue[++size]=data; o%1dbbh
fixUp(size); q(iM=IeiN
} XeRbn
} `^#V1kRmH
=(%+S<}
private int size=0; KH_~DZU*5
#lo1GoL\
private int[] queue; tuWJj^
9EIOa/*
public int get() { >ngP\&\
return queue[1]; LkA_M'G
} QT[yw6Z
cq-UVk"Gl
public void remove() { ujH ^ML
SortUtil.swap(queue,1,size--); ,R8:Y*@P
fixDown(1); T#:n7$M|?A
} uU;]/
file://fixdown +,$ SZO]
private void fixDown(int k) { D1g .Fek5
int j; ),53(=/hl
while ((j = k << 1) <= size) { D @bnm s
if (j < size %26amp;%26amp; queue[j] j++; i*9Bu;
if (queue[k]>queue[j]) file://不用交换 SZ)AO8&
break; ,]* MI"
SortUtil.swap(queue,j,k); ~wl4
k = j; NKJ+DD:'
} a ]~Yi.H
} p;k7\7
private void fixUp(int k) { <+iL@'SgF
while (k > 1) { c^a Dr
int j = k >> 1; @GrQ/F7
if (queue[j]>queue[k]) z3+7gp+I;
break; XzV:q!e-
SortUtil.swap(queue,j,k); nJ{vO{N
k = j; ehe;<A
} Q q7+_,w
} ?r"QJa>
{=)g?!zC
} ;{%R[M'
x.ZW%P1
} $lYy`OuC
qo^PS
SortUtil： @}[yC['
{!G
package org.rut.util.algorithm; kl/eJN'S
Z#nPn>,q
import org.rut.util.algorithm.support.BubbleSort; [(65^Zl`
import org.rut.util.algorithm.support.HeapSort; 8kA2.pIk
import org.rut.util.algorithm.support.ImprovedMergeSort; ZT'VF~
import org.rut.util.algorithm.support.ImprovedQuickSort; 9S8>"w^R
import org.rut.util.algorithm.support.InsertSort; 2$OI(7b=
import org.rut.util.algorithm.support.MergeSort; d=~-8]%\
import org.rut.util.algorithm.support.QuickSort; ?^l{t4
import org.rut.util.algorithm.support.SelectionSort; rm"C|T4:V
import org.rut.util.algorithm.support.ShellSort; o{n)w6P{R,
Xe:gH.}
/** n +R3
* @author treeroot vC1D}=Fp
* @since 2006-2-2 FWu[{X;
* @version 1.0 :1/K$A)^{
*/ F )|0U~
public class SortUtil { dd{pF\a
public final static int INSERT = 1; dY6A)[dAH'
public final static int BUBBLE = 2; ML9nfB^z!
public final static int SELECTION = 3; zVL"$ )
public final static int SHELL = 4; #Y9'n0 AL
public final static int QUICK = 5; S, g/2k*
public final static int IMPROVED_QUICK = 6; &Ub0o2+y
public final static int MERGE = 7; Nd] w I|>
public final static int IMPROVED_MERGE = 8; }/cMG/%
public final static int HEAP = 9; U0Q:sA U
: U:>X6f
public static void sort(int[] data) { q[rBu9
sort(data, IMPROVED_QUICK); `~ ,
} tn@MOOPl
private static String[] name={ ^qgOgu
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" p(J,fus
}; (Z{&[h
Q;EQ8pL?"
private static Sort[] impl=new Sort[]{ a9<&|L <
new InsertSort(), :p6.v>s8
new BubbleSort(), Ta0Ln
new SelectionSort(), 4PsJs<u
new ShellSort(), RXZ}aX[h
new QuickSort(), |#x]FNg
new ImprovedQuickSort(), \8 ~`NF
new MergeSort(), ;uK">L[u'
new ImprovedMergeSort(), T+9#&
new HeapSort() b7nER]R
}; &Fxw19[G
'c")]{
public static String toString(int algorithm){ :% o32
return name[algorithm-1]; `_*NFv1_
} K@DK4{
v\;hI5WY
public static void sort(int[] data, int algorithm) { h4\j=Np
impl[algorithm-1].sort(data); O F|3y~z
} )X dpzWod
|` +G7?)Y
public static interface Sort { >AsrPU[
public void sort(int[] data); 9~FB^3Nz_
} ecjjCt2S
9N?BWv}
public static void swap(int[] data, int i, int j) { DQ a0S7I
int temp = data; 8T2iqqG/1
data = data[j]; kS@6'5U
data[j] = temp; -55Pvg0ND
} 68pB*(i
} "N|gU;~W