[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; aA$\iFYA
} P$z%:Q
int i1=l; ;i.MDW^N
int i2=mid+1; tQG'f*4
for(int cur=l;cur<=r;cur++){ GH':Yk
if(i1==mid+1) 5=*i!c _m
data[cur]=temp[i2++]; <#8}![3Q
else if(i2>r) <}RD]Sc$1
data[cur]=temp[i1++]; HY_>sD
else if(temp[i1] data[cur]=temp[i1++]; CF3x\6.q}
else R<fF ^^
data[cur]=temp[i2++]; p8XvfM
} 4RctYMz
} -uN{28;@
6|lsG6uf
} 0,-]O=
X9PbU1o;
改进后的归并排序: @-K[@e/uwy
;07$G+['
package org.rut.util.algorithm.support; Xl1%c7r.1
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import org.rut.util.algorithm.SortUtil; 9:g A0Z
_1RvK? ;.{
/** E5A"sB
* @author treeroot 3f$n8>mq
* @since 2006-2-2 s#<fj#S
* @version 1.0 t{B@k[|
*/ dSKvs"
public class ImprovedMergeSort implements SortUtil.Sort { 5s\;7>
|X*y-d77W
private static final int THRESHOLD = 10; VMF?qT3Nd
]@21KO
/* W{Je)N
* (non-Javadoc) phG*It}
* F3vywN1$,
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) vCej( ))
*/ 59$PWfi-\
public void sort(int[] data) { ?7pn%_S
int[] temp=new int[data.length]; > dVhIbG
mergeSort(data,temp,0,data.length-1); ~-NSIV:f
} yp4[EqME
q_^yma
private void mergeSort(int[] data, int[] temp, int l, int r) { E$z-|-{>
int i, j, k; cQxUEY('+
int mid = (l + r) / 2; ez9F!1
if (l == r) Py#EjF12
return; #-Mr3
if ((mid - l) >= THRESHOLD) Wm"q8-<<
mergeSort(data, temp, l, mid); qi~-<qW
else 3]'ab-,Vp
insertSort(data, l, mid - l + 1); t$,G%micj
if ((r - mid) > THRESHOLD) LmyaC2
mergeSort(data, temp, mid + 1, r); Uc_}="
else g$2#TWW5
insertSort(data, mid + 1, r - mid); o"0~
/Z]nV2$n)V
for (i = l; i <= mid; i++) { I9L3Y@(f6m
temp = data; zqrqbqK5R
} 8ZbXGQ
for (j = 1; j <= r - mid; j++) { 1!V[fPJ
temp[r - j + 1] = data[j + mid]; \15'~]d
} g]JJ!$*1
int a = temp[l]; Z" H;t\P
int b = temp[r]; *tT}N@<%
for (i = l, j = r, k = l; k <= r; k++) { PA803R74
if (a < b) { .7 )oWd!
data[k] = temp[i++]; SIm1fC
a = temp; x6JV@wA&
} else { 2gklGDJD
data[k] = temp[j--]; z&n2JpLY7
b = temp[j]; ;X]B0KFe7
} I)#8}[vK
} rSt5@f?
} 'hWA&Xx+
` ;mQ"lO
/** #hn
* @param data R+ \%
* @param l d0}(d Gl
* @param i K"t?
*/ yKrbGK*=_
private void insertSort(int[] data, int start, int len) { BI%~0Gj8
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); -1B.A
} 6ERMn"[_w
} #wT6IU1
} x&J\swN9
} KwMt@1Z
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堆排序： y@$E5sz
l="X|t
package org.rut.util.algorithm.support; dHiir&Rd9`
LKI\(%ba#
import org.rut.util.algorithm.SortUtil; ,<K+.7,)E
ZY7-.
/** %E#Ubm!
* @author treeroot b==jlYa=
* @since 2006-2-2 qov<@FvE0
* @version 1.0 d])ctxB
*/ e0TxJ*
public class HeapSort implements SortUtil.Sort{ RLL ph
gCsN\z
/* (non-Javadoc) 6 %aaK|0
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) B*}]'
*/ iex%$> "
public void sort(int[] data) { h*y+qk-!\g
MaxHeap h=new MaxHeap(); aY,Bt
h.init(data); *p9)5
for(int i=0;i h.remove(); B%u[gNZ
System.arraycopy(h.queue,1,data,0,data.length); +J{ErsG?6P
} 1E||ft-1i*
XRkUv>Yk
private static class MaxHeap{ q,#s m'S
G Wa6FX:/
void init(int[] data){ "1a!]45+
this.queue=new int[data.length+1]; 5*A5Y E-
for(int i=0;i queue[++size]=data; ^1c7\"{
fixUp(size); RFS}!_t+|
} aqk$4IG
} Op9 ^Eu%n
re%XaL
private int size=0; Hicd -'
@$5~`?
private int[] queue; W{q P/R
hTO2+F*
public int get() { Md>C!c
return queue[1]; t {1 [Ip
} w+j\Py_G"
2.Ww(`swL
public void remove() { <G<5)$ S
SortUtil.swap(queue,1,size--); E <j=5|0t
fixDown(1); 6J JA"] `
} S}h d,"I
file://fixdown 3 ;F
private void fixDown(int k) { F[O147&C
int j; ,)d`_AD+5
while ((j = k << 1) <= size) { ,KM%/;1Dm
if (j < size %26amp;%26amp; queue[j] j++; ` W);+s
if (queue[k]>queue[j]) file://不用交换 r90tXx
break; `EMGrw_
SortUtil.swap(queue,j,k); \fC;b"j
k = j; bG"FN/vg
} r|ZB3L|7
} $$0< &
private void fixUp(int k) { DC> R
while (k > 1) { RJ0,7E<B
int j = k >> 1; W!.FnM5x
if (queue[j]>queue[k]) }oG6XI9
break; iNi1+sm
SortUtil.swap(queue,j,k); LzLJ6A>;R
k = j; ]Z\W%'q+
} l}-k>fug
} ziO(`"v
fX,O9d$
} WW3Jxd
A_ &IK;-go
} %YF /=l
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SortUtil： mMZrBz7r
X#0yOSR
package org.rut.util.algorithm; 5M'cOJ
9cN@y<_I
import org.rut.util.algorithm.support.BubbleSort; $4ZV(j]
import org.rut.util.algorithm.support.HeapSort; By!u*vSev
import org.rut.util.algorithm.support.ImprovedMergeSort; FVP,$
import org.rut.util.algorithm.support.ImprovedQuickSort; +&f_k@+
import org.rut.util.algorithm.support.InsertSort; ,Iz9!i J"
import org.rut.util.algorithm.support.MergeSort; tGl|/
import org.rut.util.algorithm.support.QuickSort; v_%6Ly
import org.rut.util.algorithm.support.SelectionSort; ("}Hs[
import org.rut.util.algorithm.support.ShellSort; yr>J^Et%_
p}!)4EI=
/** O\;Lb[`lb
* @author treeroot IRk)u`
* @since 2006-2-2 j?$B@Zk
* @version 1.0 DH_~,tK9
*/ [{xY3WS
public class SortUtil { 6.45^'t]
public final static int INSERT = 1; <=%[.. (S
public final static int BUBBLE = 2; yRyRH%p)
public final static int SELECTION = 3; 7u^wO<
public final static int SHELL = 4; bL0]Yuh
public final static int QUICK = 5; ~MB)}!S:
public final static int IMPROVED_QUICK = 6; /#:*hn
public final static int MERGE = 7; ]x8Y]wAU&{
public final static int IMPROVED_MERGE = 8; jM6$R1HX
public final static int HEAP = 9; F+R1}5-3cl
ZT/f
public static void sort(int[] data) { d!&LpODI]*
sort(data, IMPROVED_QUICK); 0]DX KI
} x2I|iA=
private static String[] name={ LHOt(5VY
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" kn3GgdU
}; FO!0TyQ
q2*)e/}H
private static Sort[] impl=new Sort[]{ r:0RvWif
new InsertSort(), Dvz 6 E
new BubbleSort(), VY~*QF~P
new SelectionSort(), =|$U`~YB
new ShellSort(), L&NpC&>wD
new QuickSort(), qx >Z@o
new ImprovedQuickSort(), ';v2ld 9
new MergeSort(), cJwe4c6.m
new ImprovedMergeSort(), Z9% u,Cb
new HeapSort() Pk5\v0vkg
}; >yVrIko
^56D)A=
public static String toString(int algorithm){ 3#udzC
return name[algorithm-1]; V5h_uGOD
} e>!]_B1ad
5gx;Bp^_
public static void sort(int[] data, int algorithm) { *)\y52z
impl[algorithm-1].sort(data); 5$Kv%U
} H)*%eG~
K|~!oQ
public static interface Sort { q(s0dkrj
public void sort(int[] data); {t0!N]'
} +dq2}gM
R"t2=3K
public static void swap(int[] data, int i, int j) { +ZE"pA^C
int temp = data; y\iECdPU
data = data[j]; u5U^}<}y}
data[j] = temp; d@Bd*iI<
} '{JMWNY
} {~EsO1p