[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; 4`v!Z#e/aX
} d j5hv~
int i1=l; %:9oDK
int i2=mid+1; ^rAa"p9
for(int cur=l;cur<=r;cur++){ |`O5Xs1{B
if(i1==mid+1) ja=w5
data[cur]=temp[i2++]; ,J=P,](
else if(i2>r) LEWhb!U
data[cur]=temp[i1++]; ]7GlO9
else if(temp[i1] data[cur]=temp[i1++]; Gwec4D
else S/A1RUt
data[cur]=temp[i2++]; :<S<f%
} HTjkR*E
} 2b@tj 5
b'p4wE>
} s4LO&STh{
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改进后的归并排序: @E9" Zv-$
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package org.rut.util.algorithm.support; Zk-~ar
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import org.rut.util.algorithm.SortUtil; Tenf:Hm/k
W#F Q,+0)
/** }M>rE
* @author treeroot fL*T3[d
* @since 2006-2-2 j f~wBmd7
* @version 1.0 \FmKJ\
*/ K|S:{9Q
public class ImprovedMergeSort implements SortUtil.Sort { @\P4/+"9
J1ON,&[J
private static final int THRESHOLD = 10; uBnoQ~Qd[z
L1m{]>{-
/* ]c)_&{:V
* (non-Javadoc) Bn?V9TEoO
* AG6K daJ
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) CON0E~"
*/ NaUr!s
public void sort(int[] data) { []kN16F
int[] temp=new int[data.length]; 1eS_ nLFw~
mergeSort(data,temp,0,data.length-1); !vD{Df>
} j+4H}XyE
"UVFU-Z
private void mergeSort(int[] data, int[] temp, int l, int r) { bJ /5|E?
int i, j, k; {MdLX.ycc)
int mid = (l + r) / 2; LaMLv<)k
if (l == r) Vy<HA*
return; zy'D!db`Z
if ((mid - l) >= THRESHOLD) ,zTb<g
mergeSort(data, temp, l, mid); 0ZpFE&
else c:!zO\P#
insertSort(data, l, mid - l + 1); e 8\;t"D
if ((r - mid) > THRESHOLD) `\u;K9S6
mergeSort(data, temp, mid + 1, r); Y]|:?G7l]
else 9O*_L:4o
insertSort(data, mid + 1, r - mid); {No L
* *H&+T/B
for (i = l; i <= mid; i++) { E; $+f
temp = data; Z"-L[2E/{!
} ~X(UcZ2
for (j = 1; j <= r - mid; j++) { nKr9#JebRC
temp[r - j + 1] = data[j + mid]; }G<T:(a
} ^ZDBO/
int a = temp[l]; SO\/-]9#
int b = temp[r]; Ter:sge7
for (i = l, j = r, k = l; k <= r; k++) { !5@_j,lW(
if (a < b) { G9P!_72
data[k] = temp[i++]; #V02hs1
a = temp; <+j)P4O4
} else { 2S3lsp5!
data[k] = temp[j--]; ?(6mVyIe
b = temp[j]; 6R;3%-D
} t>)45<PEw
} QYb33pN|
} S8Fmy1#
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/** #zUXyT#X
* @param data NG&_?|OmV
* @param l M6r^L6$N
* @param i Z=5qX2fy1*
*/ s?Uh|BfB
private void insertSort(int[] data, int start, int len) { ZSy?T
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); W=B"Q qL
} _96~rel_P
} "<+ih0Ma
} nR>r2wMk@
} ;^Sr"v6r>u
ysIh[1E~%:
堆排序： |wE3UWsy
:q<Z'EnW
package org.rut.util.algorithm.support; DmVP
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import org.rut.util.algorithm.SortUtil; }U w&Ny
SHb(O<6
/** $2DuB
* @author treeroot lOwS&4UT
* @since 2006-2-2 R=Ws#'
* @version 1.0 6&Juv
*/ L(>=BK*
public class HeapSort implements SortUtil.Sort{ [[~w0G~1
5Ky#GuC
/* (non-Javadoc) oY~ Dg
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) l=N2lHU
*/ w=h1pwY
public void sort(int[] data) { W>(/ bX
MaxHeap h=new MaxHeap(); 2jsw"aHW
h.init(data); *=ZsqOHwG
for(int i=0;i h.remove(); <!$:8ls
System.arraycopy(h.queue,1,data,0,data.length); H2xeP%;$
} [+*$\
\k`n[{
private static class MaxHeap{ X0;4_,=
$P7iRM]
void init(int[] data){ '$As<LOEd/
this.queue=new int[data.length+1]; ^ 5VK>
for(int i=0;i queue[++size]=data; {HC@u{K-
fixUp(size); ffXyc2o
} '/Bidb?
} aKUS5jDu
+t4BQf
private int size=0; HBys
/<CSVJ_r
private int[] queue; +#b:d=v!
._wkj
public int get() { =&0wr6
return queue[1]; cr?7O;,
} 1Kvx1p
04%S+y.6&Y
public void remove() { D47R
SortUtil.swap(queue,1,size--); 6+V\t+aug
fixDown(1); ]Q "p\@\!
} O9'x-A%
file://fixdown o]{uc,
private void fixDown(int k) { hqk}akXt
int j; sG~<M"znV
while ((j = k << 1) <= size) { Et"?8\"n7
if (j < size %26amp;%26amp; queue[j] j++; gef6pfV
if (queue[k]>queue[j]) file://不用交换 '6$*YN&5
break; ~.PO[hC
SortUtil.swap(queue,j,k); $rXh0g
k = j; H$ftGwS8
} p\C%%
} k"kJ_(
private void fixUp(int k) { NVIK>cT6
while (k > 1) { KtS)'jf
int j = k >> 1; ]maYUKqv}'
if (queue[j]>queue[k]) !@u>A_
break; &)i|$J 2.
SortUtil.swap(queue,j,k); <)g8yA
k = j; n/QF2&X7)
} KucV3-I
} %puLr'Y
jUj<~:Q}3o
} _qvK*nE
m6eZ_&+u
} o01kYBD
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SortUtil： , "jbq~
O2{)WWOT
package org.rut.util.algorithm; G.+l7bnZM
n}A\2bO
import org.rut.util.algorithm.support.BubbleSort; 4fh^[\
import org.rut.util.algorithm.support.HeapSort; E'1+Yq
import org.rut.util.algorithm.support.ImprovedMergeSort; : FAH\
import org.rut.util.algorithm.support.ImprovedQuickSort; +u@aJ_^
import org.rut.util.algorithm.support.InsertSort; ]U[X1W+@
import org.rut.util.algorithm.support.MergeSort; _!xD8Di#
import org.rut.util.algorithm.support.QuickSort; N-lGa@ j
import org.rut.util.algorithm.support.SelectionSort; * v8Ts
import org.rut.util.algorithm.support.ShellSort; DfJ2PX}q
{qKxz9.y
/** nmlPX7!{$
* @author treeroot 4vK8kkW1
* @since 2006-2-2 Dz!fpE'L
* @version 1.0 fsO9EEn7X
*/ *fO3]+)d+
public class SortUtil { uBg 8h{>
public final static int INSERT = 1; @/J[t
public final static int BUBBLE = 2; 8pM>Co!
public final static int SELECTION = 3; ]"AyAkT(
public final static int SHELL = 4; v,NHQyk
public final static int QUICK = 5; nM=e]qH
public final static int IMPROVED_QUICK = 6; B bhfG64
public final static int MERGE = 7; U]qav,^[
public final static int IMPROVED_MERGE = 8; v8>v.}y
public final static int HEAP = 9; |1Dc!V'?"
SEQ%'E5-'
public static void sort(int[] data) { #LcrI
sort(data, IMPROVED_QUICK); [\)oo
} K*K1(_x=
private static String[] name={ |sqZ$Mu
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Q_*_?yf
}; 5OM?3M
`|1MlRM9
private static Sort[] impl=new Sort[]{ N)R[6u}
new InsertSort(), '2J0>Bla
new BubbleSort(), P`$12<\O1
new SelectionSort(), 3HG;!D~m;
new ShellSort(), -9P2`XQ^
new QuickSort(), RKd
new ImprovedQuickSort(), GYRYbiwqdi
new MergeSort(), BOlAm*tFt
new ImprovedMergeSort(), NX* O_/
new HeapSort() (lA.3 4.p
}; {TSY|D2
\`'KlF2
public static String toString(int algorithm){ 1F[L"W;r
return name[algorithm-1]; OL59e%X
} lYf+V8{
]7sx;KFv
public static void sort(int[] data, int algorithm) { &Y|Xd4:
impl[algorithm-1].sort(data); <>SdVif]
} wn+FTqj
k@!r#`j3
public static interface Sort { 6@;ha=[+
public void sort(int[] data); .r|*Ch#;P
} 9G?ldp8
_cJ[ FP1
public static void swap(int[] data, int i, int j) { `&7RMa4=
int temp = data; )9"oL!2h
data = data[j]; vvu<:16
data[j] = temp; Z%o7f6P0IX
} `hh9"Ws%
} $FM' 3%B[