[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; yp=sL' E
} h7K,q S
int i1=l; x4g6Qze
int i2=mid+1; yyu-y0_
for(int cur=l;cur<=r;cur++){ $4ZV(j]
if(i1==mid+1) By!u*vSev
data[cur]=temp[i2++]; FVP,$
else if(i2>r) +&f_k@+
data[cur]=temp[i1++]; ,Iz9!i J"
else if(temp[i1] data[cur]=temp[i1++]; tGl|/
else v_%6Ly
data[cur]=temp[i2++]; ("}Hs[
} ^fd*KM
} Ho/tCU|w
O\;Lb[`lb
} 3HP { a
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改进后的归并排序: rDwd!Jet
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package org.rut.util.algorithm.support; txnH~;(
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import org.rut.util.algorithm.SortUtil; G='`*_$
,*lns.|n
/** 2w1Mf<IXPo
* @author treeroot 5Y`4%*$
* @since 2006-2-2 N`N=}&v ]
* @version 1.0 T$r/XAs
*/ BDPE.8s
public class ImprovedMergeSort implements SortUtil.Sort { pcscNUp
.@mZG<vg
private static final int THRESHOLD = 10; LR#.xFQ+
=M@)qy
/* \J?&XaO=
* (non-Javadoc) ^hEN
* V?^qW#AG
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Xu_1r8-|=b
*/ r:0RvWif
public void sort(int[] data) { Dvz 6 E
int[] temp=new int[data.length]; VY~*QF~P
mergeSort(data,temp,0,data.length-1); =|$U`~YB
} L&NpC&>wD
cJwe4c6.m
private void mergeSort(int[] data, int[] temp, int l, int r) { Z9% u,Cb
int i, j, k; Pk5\v0vkg
int mid = (l + r) / 2; >yVrIko
if (l == r) ^56D)A=
return; 3#udzC
if ((mid - l) >= THRESHOLD) $ <[r3
mergeSort(data, temp, l, mid); ;*Y+.?>a
else t*BCpC}
insertSort(data, l, mid - l + 1); 30Q77,Nsny
if ((r - mid) > THRESHOLD) g.:ZMV
mergeSort(data, temp, mid + 1, r); 3~WI3ZIR
else @*op5qVw
insertSort(data, mid + 1, r - mid); A9DFZZ0
at*DYZBjDB
for (i = l; i <= mid; i++) { +dq2}gM
temp = data; R"t2=3K
} Z *l&<q>#
for (j = 1; j <= r - mid; j++) { ~]W @+\l
temp[r - j + 1] = data[j + mid]; 066\zAPdH
} `+TC@2-?
int a = temp[l]; '{JMWNY
int b = temp[r]; {~EsO1p
for (i = l, j = r, k = l; k <= r; k++) { sKiy1Ww
if (a < b) { 1#>uqUxah
data[k] = temp[i++]; 8BS Nm
a = temp; cqZlpm$c
} else { 7I(QTc)*
data[k] = temp[j--]; <Z]j89wzDZ
b = temp[j]; E){ODyk
} (]fbCH:
} 8rU| Oh
} 2Z^p)
Gh{9nM_\"
/** ?5pZp~
* @param data Pa|*Jcr
* @param l Uul5h8F
* @param i Ix=(f0|
*/ 5V0#_!QAN
private void insertSort(int[] data, int start, int len) { ` -f\6r|:)
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); vf?m6CMU!
} Jl6biJx
} 11fV|b%
} h;cw=G
} KUq(&H7
^\VVx:]
堆排序： ]nxSVKE4p
'2<N_)43$
package org.rut.util.algorithm.support; }b<w\9AF
NZ^hp\q
import org.rut.util.algorithm.SortUtil; uAk>VPuuZ
?6MUyH]a
/** 9I1`*0A
* @author treeroot j{ri]?p
* @since 2006-2-2 e<u~v0rDl
* @version 1.0 Fb{HiU9<!
*/ 1[RI 07g7*
public class HeapSort implements SortUtil.Sort{ vBY?3p,0p
FPE6H:'
/* (non-Javadoc) #xq|/JWs
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) YcSPU(
*/ `RE K,^U
public void sort(int[] data) { q(#,X~0
MaxHeap h=new MaxHeap(); u~N'UD1x
h.init(data); #K>Ue>hx
for(int i=0;i h.remove(); \/m-G:|
System.arraycopy(h.queue,1,data,0,data.length); >dDcm
} P!&yYR\
S*ie$}ZX
private static class MaxHeap{ =}+xD|T
WZbRR.TxO
void init(int[] data){ U'}[:h~)
this.queue=new int[data.length+1]; leXdxpc
for(int i=0;i queue[++size]=data; ZtI@$ An
fixUp(size); VW] ,R1q
} 7<5=fYbr
} &_]bzTok
8feLhWg'P
private int size=0; /)Weg1b
_#<7s`i
private int[] queue; (gutDUO;
(.$e@k=
public int get() { r,GgMk
return queue[1]; [&p/7
} |L <
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public void remove() { j W-K
SortUtil.swap(queue,1,size--); clT[?8*
fixDown(1); 'L%)B-,n
} c#fSt}J>C
file://fixdown Ee$F]NA
private void fixDown(int k) { Sjmq\A88dc
int j; ,YrPwdaTB
while ((j = k << 1) <= size) { !3*%-8bp
if (j < size %26amp;%26amp; queue[j] j++; 2<_|1%C
if (queue[k]>queue[j]) file://不用交换 X&%;(`
break; .7Itbp6=R
SortUtil.swap(queue,j,k); qi1#s,
k = j; X'7MW? q@
} Q6PMRG}/o
} 3+vMi[YO
private void fixUp(int k) { h& Ezhv2
while (k > 1) { 3pkx3tp{
int j = k >> 1; ,Mn?h\
if (queue[j]>queue[k]) 5pxw[c53#
break; `S]DHxS
SortUtil.swap(queue,j,k); :rN5HOg^9
k = j; :1!k*5
} MBFn s/
} F:G Vysy
v*@R U
} arn7<w0
0(|36;x
} \'P79=AU
q{Gf@
SortUtil： aN"dk-eK
212
package org.rut.util.algorithm; F#l!LER^1g
:h<QM$P<
import org.rut.util.algorithm.support.BubbleSort; '# J/e0o@
import org.rut.util.algorithm.support.HeapSort; pRh)DM#9
import org.rut.util.algorithm.support.ImprovedMergeSort; DcNwtts
import org.rut.util.algorithm.support.ImprovedQuickSort; XCE<].w
import org.rut.util.algorithm.support.InsertSort; 2NWQiSz
import org.rut.util.algorithm.support.MergeSort; TZE;$:1vx>
import org.rut.util.algorithm.support.QuickSort; A}0u-W
import org.rut.util.algorithm.support.SelectionSort; PA${<wyBR_
import org.rut.util.algorithm.support.ShellSort; [gE2;J0*
C,dRdEB>
/** EceD\}
* @author treeroot gib;> nuBK
* @since 2006-2-2 K]Z];C#)
* @version 1.0 1(m[L=H5>
*/ ?lQ-HOAw
public class SortUtil { oJor ]QYK
public final static int INSERT = 1; b:6e2|xf?
public final static int BUBBLE = 2; N5@l[F7I
public final static int SELECTION = 3; "I^pb.3
public final static int SHELL = 4; =_9grF-
public final static int QUICK = 5; 4*_.m9{
public final static int IMPROVED_QUICK = 6; $or8z2d1
public final static int MERGE = 7; 9{n?Jy
public final static int IMPROVED_MERGE = 8; |Ht~o(]&&/
public final static int HEAP = 9; [|oOP$u
JCZ5q9b
public static void sort(int[] data) { pq<2:F:Kl
sort(data, IMPROVED_QUICK); C4t@;U=x
} iea7*]vW
private static String[] name={ (&-!l2
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ]s^Pw>/`
}; t,R4q*
Q`[J3-Q*{
private static Sort[] impl=new Sort[]{ Iq: G9M
new InsertSort(), N#4"P:Sv
new BubbleSort(), '645Fr[lg
new SelectionSort(), LP5@ID2G
new ShellSort(), Xe:e./@
new QuickSort(), hGlRf_{
new ImprovedQuickSort(), >R2o7~
new MergeSort(), _J33u3v
new ImprovedMergeSort(), [5s4Jp$+
new HeapSort() C!S(!Z,
}; Tyt1a>!qA
JAP4Vwj%j
public static String toString(int algorithm){ s<fzk1LZ
return name[algorithm-1]; 8z'_dfP=5
} ttA0* >'
v[=TPfX0
public static void sort(int[] data, int algorithm) { ,L9ioYbp
impl[algorithm-1].sort(data); 2W vf[2Xw
} 8YwSaBwO
p& +w
public static interface Sort { j+QE~L
public void sort(int[] data); "2J2za
} zT"W(3
"gGv>]3
public static void swap(int[] data, int i, int j) { p+O,C{^f
int temp = data; #tQ__V
data = data[j]; `{W>Dy
data[j] = temp; G}p*oz~
} \ q=Bbfzv
} G7d)X^q!xS