[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; WVOoHH
} [P{a_(
int i1=l; / $_M@>
int i2=mid+1; Apmw6cc
for(int cur=l;cur<=r;cur++){ SyAo, )j
if(i1==mid+1) Hte[TRbM
data[cur]=temp[i2++]; Ls1B\Aw_
else if(i2>r) j1A|D
data[cur]=temp[i1++]; 9p4y>3
else if(temp[i1] data[cur]=temp[i1++]; \9w~pO
else 4^[ /=J}
data[cur]=temp[i2++]; `;$h'eI9
} "TNVD"RLY
} z6I%wh
Z5$fE7ba+
} nM8[
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改进后的归并排序: 6J\fF tB@V
t+O e)Ns
package org.rut.util.algorithm.support; aBxiK[[`
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import org.rut.util.algorithm.SortUtil; +P)ys#=
R&*@@F-dx
/** dxCPV6 XI
* @author treeroot Zj!Abji=O
* @since 2006-2-2 h&`y$Jj
* @version 1.0 DZk1ZLz
*/ @PX\{6&
public class ImprovedMergeSort implements SortUtil.Sort { &I/qG`W
Xb,T{.3@
private static final int THRESHOLD = 10; "}zt`3
Q|c|2byb
/* ?:uNN
* (non-Javadoc) v+6e;xl8
* DpvrMI~I_
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Z9[+'ZWt
*/ vy9dAl
public void sort(int[] data) { Ilq=wPD}j
int[] temp=new int[data.length]; RB$ z]/=
mergeSort(data,temp,0,data.length-1); rt}^4IqL
} 5JSrrpGr
s`;f2B/|
private void mergeSort(int[] data, int[] temp, int l, int r) { !YE zFU`L
int i, j, k; [>Fm[5x
int mid = (l + r) / 2; B<,YPS8w
if (l == r) =J/FJb
return; BJy;-(JP
if ((mid - l) >= THRESHOLD) kO_5|6
mergeSort(data, temp, l, mid); &%,DZA`
else \Y5W!.(%w
insertSort(data, l, mid - l + 1); H=~9CJ+tc
if ((r - mid) > THRESHOLD) ahGT4d`)9
mergeSort(data, temp, mid + 1, r); uM S*(L_
else r,NgG!zq<
insertSort(data, mid + 1, r - mid); q>s`uFRg(
G;1?<3
for (i = l; i <= mid; i++) { ~ap2m
temp = data; fY W|p<Q0
} OZ(dpV9.S
for (j = 1; j <= r - mid; j++) { r:g9Z_
temp[r - j + 1] = data[j + mid]; ar^i|`D
} Adx`8}N8
int a = temp[l]; wT_h!W
int b = temp[r]; eUBrzoCO
for (i = l, j = r, k = l; k <= r; k++) { .F2:!h$
if (a < b) { +!yXTC
data[k] = temp[i++]; c0rk<V%5+
a = temp; 5?u}#zO
} else { r>t1 _b+nu
data[k] = temp[j--]; VaLs`q&3>
b = temp[j]; .*5Z"Q['G
} Es4qPB`g.
} HdX2YPYn;
} E>uVofhml
zT9JBMNE:
/** l#qv 5f
* @param data )!W45"l-3M
* @param l l67Jl"v
* @param i B[o`k]]
*/ u{e-G&]^;
private void insertSort(int[] data, int start, int len) { LKF/u` 0dP
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); N#z~
} ~Y!kB:D5;~
} =xN= #
} TnH\O$
} [(mlv42"
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堆排序： ;H0{CkH
!CY&{LEYn0
package org.rut.util.algorithm.support; [2c{k
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import org.rut.util.algorithm.SortUtil; Yl^mAS[w&
R9o-`Wz
/** %Y nmuZ
* @author treeroot @%ECj)u`O
* @since 2006-2-2 {MBTP;{*~
* @version 1.0 ^+|De}`u
*/ &#{dWObh
public class HeapSort implements SortUtil.Sort{ ~N0sJ%
|NFZ(6vNh
/* (non-Javadoc) 7(a2L&k^
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) A*yi"{FLi
*/ ?&+9WJ<M
public void sort(int[] data) { /bRg?Q
MaxHeap h=new MaxHeap(); ]$iqa"{
h.init(data); ]+Ixi o
for(int i=0;i h.remove(); o*S"KX$
System.arraycopy(h.queue,1,data,0,data.length); -G|a*^
} I/J7rkf
r7mD{0s*
private static class MaxHeap{ 3251Vq %
VR?^HA9
void init(int[] data){ N:5[,O<m_
this.queue=new int[data.length+1]; &:#h$`4
for(int i=0;i queue[++size]=data; 5jcte< 5I_
fixUp(size); Q /x8 #X
} rSXzBi{
} 8MwK.H[U
()T[$.(
private int size=0; ;3'NMk
SI:ifR&T
private int[] queue; z_|oCT!6
bCv{1]RC2
public int get() { #;KsJb)N.
return queue[1]; ?uLeFD
} eDKxn8+(H
S_(d9GK<
public void remove() { g{k1&|
SortUtil.swap(queue,1,size--); .^(/n9|o-
fixDown(1); .x83Ah`
} S56]?M|[
file://fixdown uq3{hB#
private void fixDown(int k) { )(M7lq.e7
int j; sy* y\5yJ
while ((j = k << 1) <= size) { Kb;dKQ
if (j < size %26amp;%26amp; queue[j] j++; tA.`k;LT
if (queue[k]>queue[j]) file://不用交换 3Hi+Z}8
break; tl yJmdl
SortUtil.swap(queue,j,k); l:|D,q
k = j; eU+ {*YJg
} s54nF\3V
} ;U=q-tb
private void fixUp(int k) { b&)5:&MI
while (k > 1) { alMYk
int j = k >> 1; Z3KO90O!8
if (queue[j]>queue[k]) l~:v (R5
break; {^)70Vz>PE
SortUtil.swap(queue,j,k); :Sg&0Wj+#j
k = j; 'fV%Z
} jR ~DToQ
} IE~%=/|
,:n| ?7
} K]oM8H1
]:]H:U]p
} RSfM]w}Hq#
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SortUtil： >B -q@D
b}!3;:iD
package org.rut.util.algorithm; x+5p1sv6
zR6siAV9
import org.rut.util.algorithm.support.BubbleSort; UM%o\BiO
import org.rut.util.algorithm.support.HeapSort; BbOu/i|
import org.rut.util.algorithm.support.ImprovedMergeSort; D0G-5}s`
import org.rut.util.algorithm.support.ImprovedQuickSort; y7\"[<E`(V
import org.rut.util.algorithm.support.InsertSort; &-l8n^
import org.rut.util.algorithm.support.MergeSort; )+y G+
import org.rut.util.algorithm.support.QuickSort; is;XmF*5=
import org.rut.util.algorithm.support.SelectionSort; \{\MxXW
import org.rut.util.algorithm.support.ShellSort; qem(s</:
$P o}
/** tq50fq'
* @author treeroot ?8@>6IXn
* @since 2006-2-2 oP?YA-#nc
* @version 1.0 'XOX@UH d
*/ 8iQ[9
public class SortUtil { Yj(4&&Q
public final static int INSERT = 1; 7^TV~E#
public final static int BUBBLE = 2; faXx4A2"
public final static int SELECTION = 3; Tpp&
public final static int SHELL = 4; v`[Eb27W.
public final static int QUICK = 5; gYAF'?
public final static int IMPROVED_QUICK = 6; GyI-)BlDC
public final static int MERGE = 7; zdun,`6
public final static int IMPROVED_MERGE = 8; Rf %HIAVE
public final static int HEAP = 9; hjx)D
NtGn88='{
public static void sort(int[] data) { ,{eUP0]
sort(data, IMPROVED_QUICK); h&@R| N
} al9.}
private static String[] name={ \(UKdv
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" eLD?jTi'
}; q>:$c0JY
&O\(;mFc
private static Sort[] impl=new Sort[]{ S&jesG-F
new InsertSort(), mY!iu(R1
new BubbleSort(), ?dZt[vAMn
new SelectionSort(), 9 t n!t
new ShellSort(), ;,'igdold
new QuickSort(), oS,I~}\kQ
new ImprovedQuickSort(), NVV}6TUV
new MergeSort(), '(&%O8Yi
new ImprovedMergeSort(), JWP*>\P
new HeapSort() V:NI4dv/R
}; XJ0{
1M3%fW
public static String toString(int algorithm){ U_yE&6 T
return name[algorithm-1]; 1r)kR@!LNG
} Ei>m0 ~<\
#!J(4tXny
public static void sort(int[] data, int algorithm) { *~$~yM/~3U
impl[algorithm-1].sort(data); "%2xR[NF
} ~q0*"\Ff
&:*q_$]Oz
public static interface Sort { c8 K3.&P6
public void sort(int[] data); lt'I,Xt
} R! s6% :Yg
`ejUs]SR
public static void swap(int[] data, int i, int j) { ni&*E~a
int temp = data; 0pe3L
data = data[j]; "v*8_El
data[j] = temp; 3+7^uR$/I4
} 6"j_iB
} cvsz%:Vs