[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; 0DT2qM[,
} Px&Mi:4tG
int i1=l; <$6E r
int i2=mid+1; *0ntx$M-w
for(int cur=l;cur<=r;cur++){ _u5U> w
if(i1==mid+1) F>R)~;Ja
data[cur]=temp[i2++]; LB+=?Mz V
else if(i2>r) :!FwF65
data[cur]=temp[i1++]; <q=B(J'
else if(temp[i1] data[cur]=temp[i1++]; EPnB%'l\c
else t^;Fq{>
data[cur]=temp[i2++]; SntYi0,`
} *heQ@ww
} O~]G(TMs8W
&}=,8Gt1G
} {moNtzE;
hrt-<7U
改进后的归并排序: u#|Jl|aT
_Hj,;Z
package org.rut.util.algorithm.support; ~,7R*71
k5 l~
import org.rut.util.algorithm.SortUtil; ?+L6o C.;
YWF<2l.
/** v]S8!wU
* @author treeroot x"De 9SB
* @since 2006-2-2 `sC8ro@Fm
* @version 1.0 ;KN@v5`p
*/ 3_/d=ZI\
public class ImprovedMergeSort implements SortUtil.Sort { zKT<QM!`
8}@a?QS(&
private static final int THRESHOLD = 10; <9ph c
e 3oIoj4o
/* K#m o+n5-;
* (non-Javadoc) {u3u%^E;R
* r{&"]'/X
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) "// 8^e%Xo
*/ LK~0ck7
public void sort(int[] data) { .?:~s8kB
int[] temp=new int[data.length]; }1 ^.A84a
mergeSort(data,temp,0,data.length-1); M/;g|J jM
} .1}(Bywm5
j pV
private void mergeSort(int[] data, int[] temp, int l, int r) { 8;rS"!qM
int i, j, k; {4*%\?c,n
int mid = (l + r) / 2; FM];+d0
if (l == r) b=EZtk6>
return; 9Ua@-
if ((mid - l) >= THRESHOLD) }$U6lh/Ep
mergeSort(data, temp, l, mid); ]h@:Y]
else 1t'\!
insertSort(data, l, mid - l + 1); "rJL ^ \r
if ((r - mid) > THRESHOLD) ')<$AMy1
mergeSort(data, temp, mid + 1, r); 5o#8DIal
else 5Px_vtqP
insertSort(data, mid + 1, r - mid); OD|&qsbL
]uf_"D
for (i = l; i <= mid; i++) { %R>MSSjvr
temp = data; GjBQxn
} R?I3xb
for (j = 1; j <= r - mid; j++) { +__Rk1CVh
temp[r - j + 1] = data[j + mid]; cKAl 0_[f"
} na)ceN2h
int a = temp[l]; x #g,l2_!
int b = temp[r]; Q5JeL6t
for (i = l, j = r, k = l; k <= r; k++) { +^:K#S9U
if (a < b) { :{2$X|f 3
data[k] = temp[i++]; V"73^
a = temp; *^ BE1-
} else { ~qH@Kz\%
data[k] = temp[j--]; ^\%%9jY
b = temp[j]; D%v yO_k
} Wd#6Y}:
} o 8U2vMH
} 'Ud5;?{
U>XGJQ<NS
/** L_|Y_=r."
* @param data @hPbD?)M
* @param l Ja1*a,],L
* @param i mHy]$Z
*/ 2BY:qz%:
private void insertSort(int[] data, int start, int len) { lhU#/}Z
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); &D#v0!e~x
} X(9Ff=0.~
} KNhH4K2iP8
} DGnswN%n1
} lLv0lf
{[+gM?
堆排序： cAS5&T<
HS7!O
package org.rut.util.algorithm.support; EC0auB7G
r{_'2Z_i
import org.rut.util.algorithm.SortUtil; <[bDNe["?
I\_R& v
/** ;z#9>99rH
* @author treeroot YX(%jcj*
* @since 2006-2-2 ~S9nLb:O{
* @version 1.0 C Qebb:y
*/ |%}?*|-
public class HeapSort implements SortUtil.Sort{ 4=Zlsp
_1~Sj*
/* (non-Javadoc) ` {p5SYj
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) (@Bm2gH
*/ ]jYM;e
public void sort(int[] data) { >J1o@0tk
MaxHeap h=new MaxHeap(); _%]H}N Q
h.init(data); %M`&}'6'
for(int i=0;i h.remove(); P?F:x=@'|
System.arraycopy(h.queue,1,data,0,data.length); !8$}]uWP
} moGbBkO
[*(MI 9WM
private static class MaxHeap{ V*N9D>C
=|V3cM4'
void init(int[] data){ shB(kb{{
this.queue=new int[data.length+1]; 2%I:s6r
for(int i=0;i queue[++size]=data; t9}XO M*
fixUp(size); S^u!/ =&
} v3p..A~XZ.
} j.K yPWO
,\M'jV"SK
private int size=0; ?g&]*zc^\
{SJLM0=Z
private int[] queue; c?d#Bj ?
*VUXw@
public int get() { *=8)]_=f
return queue[1]; +2?[=g4;}
} ?/\;K1c p
C"}x=cK
public void remove() { ! 9e>J
SortUtil.swap(queue,1,size--); d dPJx<
fixDown(1); z}%to0W
} 8Xr3q eh+
file://fixdown K;95M^C\O*
private void fixDown(int k) { ;u%hwlo
int j; #%5>}$
while ((j = k << 1) <= size) { :/3`+&T^/
if (j < size %26amp;%26amp; queue[j] j++; v#6.VUAw
if (queue[k]>queue[j]) file://不用交换 M3''xrpC
break; |lv4X}H
SortUtil.swap(queue,j,k); >@X=E3
k = j; cA*%K[9
} {MS&t09Wh
} P+/L,u
private void fixUp(int k) { gSC@uf
while (k > 1) { Pzqgg43Xf
int j = k >> 1; Z`W.(gua
if (queue[j]>queue[k]) ;KhYh S(q
break; buoz La
SortUtil.swap(queue,j,k); .q=X58tHu
k = j; mH?hzxa+
} `XnFc*L 1
} }8svd#S+
17GyE=Uu
} oTL "]3`'
,uw&)A
} kahv1s-
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SortUtil： L=$P
fkYQ3d,`
package org.rut.util.algorithm; OV[-m;h|
Zwcb5\Q
import org.rut.util.algorithm.support.BubbleSort; ovl@[>OB
import org.rut.util.algorithm.support.HeapSort; l20q(lb
import org.rut.util.algorithm.support.ImprovedMergeSort; I}:/v$btM
import org.rut.util.algorithm.support.ImprovedQuickSort; *n47.(a2i
import org.rut.util.algorithm.support.InsertSort; 97g\nq<
import org.rut.util.algorithm.support.MergeSort; 'fB`e]_
import org.rut.util.algorithm.support.QuickSort; dcA0k
import org.rut.util.algorithm.support.SelectionSort; pxN'E;P-
import org.rut.util.algorithm.support.ShellSort; P$Dr6;
qHj4`&
/** Ut%ie=c
* @author treeroot ,kP{3.#Q
* @since 2006-2-2 ^\!^#rO
* @version 1.0 RHxd6Gs"
*/ o]nQo?!
public class SortUtil { C{Fo^-3
public final static int INSERT = 1; xP*RH-<
public final static int BUBBLE = 2; ~q/`Z)(yc
public final static int SELECTION = 3; *cd9[ ~
public final static int SHELL = 4; 5mV'k"Om#"
public final static int QUICK = 5; :+6m<?R)T
public final static int IMPROVED_QUICK = 6; 1^,rS
public final static int MERGE = 7; ZpdM[\Q-
public final static int IMPROVED_MERGE = 8; =}L[/RL
public final static int HEAP = 9; ~2qFA2
!>+ 0/
public static void sort(int[] data) { e0qa~5
sort(data, IMPROVED_QUICK); :sn}D~
} `SVR_
private static String[] name={ /v8qT'$^
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 6e*JCf>
}; Y,a.9AWw)
^mGTZxO
private static Sort[] impl=new Sort[]{ _V;J7Vz
new InsertSort(), wjl?@K
new BubbleSort(), Kb}N!<Z*
new SelectionSort(), 4b#YpK$7U
new ShellSort(), }A#FGH+
new QuickSort(), Y8d%L;b[D
new ImprovedQuickSort(), YONg1.^!(
new MergeSort(), JmBYD[h,
new ImprovedMergeSort(), kN_LD-
new HeapSort() h$k(|/+
}; T7,tJk,(
j_{gk"2:d`
public static String toString(int algorithm){ u]}Xq{ZN
return name[algorithm-1]; W=DQ6.
} MDlCU
>):b AfI
public static void sort(int[] data, int algorithm) { R38 w!6{
impl[algorithm-1].sort(data); l})uYae/
} n;MoMGnPh,
a5)+5
public static interface Sort { B<oi,S
public void sort(int[] data); ]6nF>C-C
} VTF),e!
)j$Bo{
public static void swap(int[] data, int i, int j) { -H]svOX
int temp = data; ^yX W.s
data = data[j]; :!|xg!|y
data[j] = temp; (R0
} H'Po
} LWW0lG!_F