[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; L-Q8iFW'
} #zP-,2!r
int i1=l; @V 'HX
int i2=mid+1; $+80V{J#
for(int cur=l;cur<=r;cur++){ 7{<v$g$
if(i1==mid+1) 0)|Z7c&
data[cur]=temp[i2++]; ,8384'
else if(i2>r) RL` jaS?V
data[cur]=temp[i1++]; Un]wP`
else if(temp[i1] data[cur]=temp[i1++]; ! t!4CY
else 2/+~h(Cc
data[cur]=temp[i2++]; {<{VJGY7T
} 8-<F4^i_i
} S})f`X9_}
'#c#.O
} .'`aX 7{\
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改进后的归并排序: ;y(;7n_ a
48-j
package org.rut.util.algorithm.support; ;Ci:d*
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import org.rut.util.algorithm.SortUtil; \lg ^rfj
pEwo}NS*H
/** 1KUjb@"
* @author treeroot bo#xqSGQ
* @since 2006-2-2 ir6aV|ea!
* @version 1.0 vN(~}gOd\
*/ WHx#;
public class ImprovedMergeSort implements SortUtil.Sort { vEfj3+e
K3mP6Z#2
private static final int THRESHOLD = 10; ! \s}A7
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/* IFBt#]l0
* (non-Javadoc) H@-q NjM
* , >WH)+a
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) LZ)g&A(j?
*/ x:-NTW -g
public void sort(int[] data) { :Fhk$?/r
int[] temp=new int[data.length]; s={>{,E
mergeSort(data,temp,0,data.length-1); KH,f'`
} #;8)UNc)}
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private void mergeSort(int[] data, int[] temp, int l, int r) { wa,`BAKJ+F
int i, j, k; 3u j|jwL
int mid = (l + r) / 2; S }`f&
if (l == r) K1X-<5]{
return; -G>J
if ((mid - l) >= THRESHOLD) PV\J] |d,%
mergeSort(data, temp, l, mid); {-I+
else j)/Vtf
insertSort(data, l, mid - l + 1); oOprzxf"+Z
if ((r - mid) > THRESHOLD) *m]Y6
mergeSort(data, temp, mid + 1, r); {*;8`+R&
else K\ Wzh;
insertSort(data, mid + 1, r - mid); bYLYJ`hH<R
x"Ll/E)\v]
for (i = l; i <= mid; i++) { Pt85q?->
temp = data; _xAru9=n^
} kLzjK]4*
for (j = 1; j <= r - mid; j++) { xp1/@Pw?
temp[r - j + 1] = data[j + mid]; (^W}uDPCB
} cS Lj\'`b
int a = temp[l]; q5r7KYH{
int b = temp[r]; q+[ )i6!?
for (i = l, j = r, k = l; k <= r; k++) { .=YV
if (a < b) { Mo@{1K/9
data[k] = temp[i++]; hYyIC:PXR
a = temp; K3vZ42n
} else { [GbrKq(
data[k] = temp[j--]; / xv5we~
b = temp[j]; 1 K}gX>F
} ~Q=;L>Qd
} 97 SS0J
} 5@l5exuG*m
#CLjQJ
/** s2L]H
* @param data 5 v.&|[\k
* @param l A'CD,R+gR
* @param i 3]1 !g6
*/ '?$@hqQn
private void insertSort(int[] data, int start, int len) { |?jgjn&RQ
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); `<>#;%
} }o]}R#|
} A)~oD_ooQ
} ;F1y!h67<
} xppnBnu$7
;S^"Y:7)
堆排序： $G <r2lPy
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package org.rut.util.algorithm.support; 5 `TMqrk
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import org.rut.util.algorithm.SortUtil; ZzK^bNx)0
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/** zU[o_[+7^
* @author treeroot dlyGgaV*X
* @since 2006-2-2 kT
* @version 1.0 *b~8`Opa`
*/ 8r>\scS
public class HeapSort implements SortUtil.Sort{ jhz*Y}MX
)j'Qi^;(D
/* (non-Javadoc) )}$rgYKJ
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Ruq;:5u
*/ 3KqRw (BK
public void sort(int[] data) { !DA4q3-U>>
MaxHeap h=new MaxHeap(); q;R&valn
h.init(data); @G]*]rkKb
for(int i=0;i h.remove(); 2Rys:$
System.arraycopy(h.queue,1,data,0,data.length); enxb pq#
} gWjYS#D
Vc(kw7
private static class MaxHeap{ _fgsHx>l7
(soTkH:#
void init(int[] data){ c^"4l 9w
this.queue=new int[data.length+1]; nv0D4 t
for(int i=0;i queue[++size]=data; 851BOkRal4
fixUp(size); q/w5Dx|:
} `dF~'
} 6|Dtx5 "r
[ {"x{;
private int size=0; R%LFFMVn
&b~X&{3,
private int[] queue; cb'Ya_
s8:epcL`A
public int get() { Msvs98LvW
return queue[1]; ai/]E6r
} i+QVs_jW
_Cf:\Xs m
public void remove() { nGTGX
SortUtil.swap(queue,1,size--); Ax|'uvVAPT
fixDown(1); I`xC0ZUKj
} [x?9<#T
file://fixdown ":e6s co
private void fixDown(int k) { '/D2d
int j; BbFLT@W4
while ((j = k << 1) <= size) { ?.ObHV*k
if (j < size %26amp;%26amp; queue[j] j++; $#%R_G]
if (queue[k]>queue[j]) file://不用交换 iiuT:r
break; x]Nx,tt
SortUtil.swap(queue,j,k); 2OI 0B\
k = j; 0 -M i q
} xc'uCbH
} VWd`06'BN'
private void fixUp(int k) { 9T2_2
while (k > 1) { f@9XSZ<.71
int j = k >> 1; 1Q^u#m3
if (queue[j]>queue[k]) nT4Ryld
break; i.K!;E>
SortUtil.swap(queue,j,k); r25VcY
k = j; 3bd`q $
} Z;u3G4XlF
} w?3ww7yf`
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} &RuTq6)r
$uwz`N:
} b'FTyi
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SortUtil： lZkJ<*z#
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package org.rut.util.algorithm; (VkO[5j
r1.zURY
import org.rut.util.algorithm.support.BubbleSort; =>o !
import org.rut.util.algorithm.support.HeapSort; |gk4X%o6
import org.rut.util.algorithm.support.ImprovedMergeSort; LB.B w
import org.rut.util.algorithm.support.ImprovedQuickSort; +F,])p4,]i
import org.rut.util.algorithm.support.InsertSort; i,;a( Sy4
import org.rut.util.algorithm.support.MergeSort; SG~HzQ\%
import org.rut.util.algorithm.support.QuickSort; TXd6o=
import org.rut.util.algorithm.support.SelectionSort; V_^pPBa
import org.rut.util.algorithm.support.ShellSort; [T'[7Z
c#?~1@=
/** Bk~lM'
* @author treeroot %H_-`A`
* @since 2006-2-2 qfAnMBM1@
* @version 1.0 O,+9r_Gh
*/ o3GZcH?
public class SortUtil { Nv0a]Am
public final static int INSERT = 1; PGZe'r1E9
public final static int BUBBLE = 2; iVVR$uzhH
public final static int SELECTION = 3; {&Rz>JK
public final static int SHELL = 4; `X()"Qw
public final static int QUICK = 5; 'b[O-6v
public final static int IMPROVED_QUICK = 6; q$H@W.f
public final static int MERGE = 7; 2ZbSdaM=
public final static int IMPROVED_MERGE = 8; :%28*fl
public final static int HEAP = 9; jL)Y'
lpB:lRM
public static void sort(int[] data) { GaJE(N
sort(data, IMPROVED_QUICK); G.N`
} f `b6E J
private static String[] name={ `CL\-
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" d@8:f
}; vN]_/T+
R:'&>.AUw
private static Sort[] impl=new Sort[]{ D5Jg(-
new InsertSort(), V2;Nv\J\
new BubbleSort(), %PPy0RZ^
new SelectionSort(), ncVt(!c,e
new ShellSort(), ,'<NyA><
new QuickSort(), U0|bKU
new ImprovedQuickSort(), #PC*l\ )
new MergeSort(), ())_4 <
new ImprovedMergeSort(), !Dc;R+Ir0!
new HeapSort() I"8Z'<|/\q
}; ~rq:I<5
Xmb##:
public static String toString(int algorithm){ Jp8,s%
return name[algorithm-1]; I@Yk &aU
} B"88 .U}$
iYdg1
public static void sort(int[] data, int algorithm) { ;$]a.9 -
impl[algorithm-1].sort(data); Hit)mwfYE
} z#n+iC$9
SEu:31k{o
public static interface Sort { SN}3
public void sort(int[] data); %k"hzjXAw
} wT3D9N.
FyXO @yF
public static void swap(int[] data, int i, int j) { 0>;[EFL
int temp = data; 7)>L#(N
data = data[j]; wpNb/U
data[j] = temp; 8{%&P%vf
} b;vVlIG
} >$3 =yw%