[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; )nbyV a
} Z;dwn~Tw
int i1=l; rsq'60
int i2=mid+1; H7cRWB
for(int cur=l;cur<=r;cur++){ NZi'eZ{^`
if(i1==mid+1) \a~;8):q=i
data[cur]=temp[i2++]; |eVTxeq
else if(i2>r) lN]X2 4t
data[cur]=temp[i1++]; +wPvQKVfI
else if(temp[i1] data[cur]=temp[i1++]; +@<^i?ale
else 37za^n?SG
data[cur]=temp[i2++]; \sXmMc
} u+, jAkr
} fR{WS:Pv
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} =^".{h'-
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改进后的归并排序: m-pIFL<^N
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package org.rut.util.algorithm.support; 6=[ PJM
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import org.rut.util.algorithm.SortUtil; ' m#Ymp
'&o> %V
/** ]>]H:NEq
* @author treeroot ;Vtpq3
* @since 2006-2-2 S+E3;' H
* @version 1.0 J3!k*"P
*/ f|HgLFx
public class ImprovedMergeSort implements SortUtil.Sort { 8mQd*GGu1
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private static final int THRESHOLD = 10; mhHm#
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/* n$\6}\k
* (non-Javadoc) =}1~~
* B1AF4}~5
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) u{y5'cJ{
*/ {3yws4
public void sort(int[] data) { H"Em|LX^
int[] temp=new int[data.length]; 0^tJX1L
mergeSort(data,temp,0,data.length-1); I?xhak1)lu
} H6+st`{
nqw*oLFQ
private void mergeSort(int[] data, int[] temp, int l, int r) { G#=b6DB
int i, j, k; S3[oA&
int mid = (l + r) / 2; L:];[xa%
if (l == r) sjgxx7
return; Q0oDl8~
if ((mid - l) >= THRESHOLD) ZBh@%A
mergeSort(data, temp, l, mid); 'XjHB!!hU
else J1wGK|F~
insertSort(data, l, mid - l + 1); %>QSeX
if ((r - mid) > THRESHOLD) }Q,C;!'"
mergeSort(data, temp, mid + 1, r); r|sy_Sk/{
else @%okaj#IO
insertSort(data, mid + 1, r - mid); ,jdKcWy'
s!zr>N"
for (i = l; i <= mid; i++) { 1,sO =p)Yg
temp = data; "nS{ ;:
} vcUM]m8k
for (j = 1; j <= r - mid; j++) { -1Ki7|0,
temp[r - j + 1] = data[j + mid]; z@40g)R2A
} RI].LB_
int a = temp[l]; Tr+Y@]"
int b = temp[r]; os0"haOI9h
for (i = l, j = r, k = l; k <= r; k++) { 'G By^hj?
if (a < b) { k1 txY
data[k] = temp[i++]; i2Iu2
a = temp; S&g-
} else { < oG\)!O
data[k] = temp[j--]; 3jQ$72_
b = temp[j]; @C6DOB
} ?%TM7Z4
} - &LZle&M
} OjL"0imN6
_O'rZ5}&
/** CpJXLc3_d5
* @param data ny;)+v?mN\
* @param l doUqUak
* @param i y#SD-#I-
*/ u K&_IE}
private void insertSort(int[] data, int start, int len) { t`/RcAwA
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); GVPEene
} X([n>w
} a}8>(jtSt
} n@8{FoF
} SOY#, Zu
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堆排序： +=F);;!
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package org.rut.util.algorithm.support; E~U|v'GCd
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import org.rut.util.algorithm.SortUtil; a[OLS+zf!P
A&|(%
/** m_W.r+s~C4
* @author treeroot i_9/!D
* @since 2006-2-2 [aVJYr2
* @version 1.0 [75e\=wK
*/ XsCbJ[Z_?q
public class HeapSort implements SortUtil.Sort{ eh# (}v
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/* (non-Javadoc) Q? |MBTo
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) k{&E}:A
*/ w\[*_wQp
public void sort(int[] data) { sJ*U Fm{
MaxHeap h=new MaxHeap(); vG=$UUh@~
h.init(data); *`/@[S2,cu
for(int i=0;i h.remove(); gG|1$
System.arraycopy(h.queue,1,data,0,data.length); <\Dl#DH
} 8c'-eT"
U\plt%2m>
private static class MaxHeap{ )1'_g4
rb4g<f|
void init(int[] data){ "pJEzC
this.queue=new int[data.length+1]; N>#P 1!eP
for(int i=0;i queue[++size]=data; Tp.iRFFkP
fixUp(size); :re(khZq#
} H_^u_%:e
} `SpS?mWA
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private int size=0; 'cCj@bZ9X
[WSIC *|;
private int[] queue; X"r$,~
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public int get() { o*S $j Cf?
return queue[1]; X Ow^"=Oa[
} MPw7!G(qj
L{ ^@O0S
public void remove() { }Bg<Fm
SortUtil.swap(queue,1,size--); icbYfgQ
fixDown(1); YZ+g<HXB
} $CV'p/^En
file://fixdown >dH*FZ:c
private void fixDown(int k) { Uv$u\D+@[
int j; Oc3%pb;
while ((j = k << 1) <= size) { FK('E3PG
if (j < size %26amp;%26amp; queue[j] j++; tAn6pGp
if (queue[k]>queue[j]) file://不用交换 y.NArN|%
break; [wxI X
SortUtil.swap(queue,j,k); ;'+cT.cmH
k = j; z-E4-\a
} qf{B
} Z-V%lRQ=b
private void fixUp(int k) { LR.+CxQ
while (k > 1) { u 9TlXn
int j = k >> 1; -C]a2
if (queue[j]>queue[k]) ~#Mx&mZ
break; U~c;W@T
SortUtil.swap(queue,j,k); xL"o)]a=
k = j; Q2PwO;E.`C
} S}I=i>QB
} hS/'b$#
!~kzxY
} g0$k_
f@g
} n#,l&Bx
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SortUtil： i`spM<iR.
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package org.rut.util.algorithm; pZn%g]nRD
_ h-X-s Y
import org.rut.util.algorithm.support.BubbleSort; 32/P(-
import org.rut.util.algorithm.support.HeapSort; cW%O-
import org.rut.util.algorithm.support.ImprovedMergeSort; jg/<"/E
import org.rut.util.algorithm.support.ImprovedQuickSort; .k(_j.v
import org.rut.util.algorithm.support.InsertSort; md s\~l73
import org.rut.util.algorithm.support.MergeSort; `v er "s;
import org.rut.util.algorithm.support.QuickSort; 9D21e(7X
import org.rut.util.algorithm.support.SelectionSort; EF~PM
import org.rut.util.algorithm.support.ShellSort; pdu
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/** ,6L>f.V^(U
* @author treeroot |g!# \
* @since 2006-2-2 ~(S4/d5
* @version 1.0 "|rqt.f2[
*/ U]$3NIe
public class SortUtil { 1\kehCt
public final static int INSERT = 1; u'."E7o#
public final static int BUBBLE = 2; GC3L2C0)k
public final static int SELECTION = 3; 8B9zo&
public final static int SHELL = 4; 4Fq}*QJ-
public final static int QUICK = 5; 3I(M<sB}
public final static int IMPROVED_QUICK = 6; %q^]./3p
public final static int MERGE = 7; v\FD~
public final static int IMPROVED_MERGE = 8; SsZzYj.d
public final static int HEAP = 9; -/?<@*n
'_Oprx
public static void sort(int[] data) { bq]a8tSB
sort(data, IMPROVED_QUICK); 'h=2_%l@Y
} 8m0sEV>
private static String[] name={ >S]')O$c
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ;{20Heuz
}; Zv93cv
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private static Sort[] impl=new Sort[]{ [l:.Q?? )|
new InsertSort(), Mr(3]EfgO
new BubbleSort(), e:<> Yq+
new SelectionSort(), uUs>/+
new ShellSort(), .EwK>ro4
new QuickSort(), '~0&m]N
new ImprovedQuickSort(), 89bKnsV
new MergeSort(), }XU- JAn
new ImprovedMergeSort(), UJ:B:hh''
new HeapSort() j C?
}; IgL8u
*Y~64FM
public static String toString(int algorithm){ Po3W+;@
return name[algorithm-1]; f_8~b0`
} jEIL(0_H
yW 3h_08
public static void sort(int[] data, int algorithm) { 0b'R5I.M
impl[algorithm-1].sort(data); t,_[nu(~8%
} r.5F^
VXS9E383
public static interface Sort { 1,,-R*x
public void sort(int[] data); #4>F%_
} XLT<,B}e
W!*vO>^1W
public static void swap(int[] data, int i, int j) { AbB>ZT>hR
int temp = data; +fN0>@s
data = data[j]; KMZ`Wn=
data[j] = temp; rf@81Ds
} |*i-Q @ D
} WW=7QCi