[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; :}~B;s0M\
} [G}l;
int i1=l; D]5cijO6
int i2=mid+1; R|t.JoP9
for(int cur=l;cur<=r;cur++){ #7,;/rtO7
if(i1==mid+1) ujoJ6UOG
data[cur]=temp[i2++]; =8 Jq'-da
else if(i2>r) /HM0p
data[cur]=temp[i1++]; /-C6I:
else if(temp[i1] data[cur]=temp[i1++]; ,=t}|!jx
else {edjvPlk
data[cur]=temp[i2++]; _*dUH5
} aL0,=g%
} <.c#l':
8s<t* pI2
} R(cM4T.a
MN. $a9m
改进后的归并排序: .hytn`+9
F*/J`l
package org.rut.util.algorithm.support; =bl6:
0r'<aA`=I
import org.rut.util.algorithm.SortUtil; aiwKkf`\
J4^aD;j
/** ]w9\q*S]
* @author treeroot 8al%F_r]
* @since 2006-2-2 0X4%Ccs
* @version 1.0 [<A|\d'x
*/ 2VA mL7)
public class ImprovedMergeSort implements SortUtil.Sort { Jhr3[A
^@n?&
private static final int THRESHOLD = 10; ~"#[<d
EPGp8VGXp~
/* +G?nmXG[vj
* (non-Javadoc) .0u@PcE:O
* C:@JLZB
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) HD{2nZT
*/ VF] ~J=>i
public void sort(int[] data) { u(g0Ob
int[] temp=new int[data.length]; t73" d#+
mergeSort(data,temp,0,data.length-1); M"<B@p]rk:
} u8i!Fxu
5AO'IhpL
private void mergeSort(int[] data, int[] temp, int l, int r) { n0%]dKCB
int i, j, k; pv;ZR
int mid = (l + r) / 2; ^+'\ u;\
if (l == r) B@v"giJgr
return; X) xeq
if ((mid - l) >= THRESHOLD) 4n,>EA85
mergeSort(data, temp, l, mid); q, XRb
else ;-!j,V+$h
insertSort(data, l, mid - l + 1); I<^&~==
if ((r - mid) > THRESHOLD) ]Geg;[t
mergeSort(data, temp, mid + 1, r); @Xj6h!"R
else x72T5.
insertSort(data, mid + 1, r - mid); $@Kwsoh'
W]=$0'
for (i = l; i <= mid; i++) { Y>2kOE
temp = data; Yl0_?.1 z
} ]pP:
for (j = 1; j <= r - mid; j++) { UKBaGX:v
temp[r - j + 1] = data[j + mid]; &5o ln@YL
} LyA}Nd]pyq
int a = temp[l]; o!>h Q#h
int b = temp[r]; ^ woCwW8n
for (i = l, j = r, k = l; k <= r; k++) { ,"EgYd8-'
if (a < b) { 86<[!ZM
data[k] = temp[i++]; -"MB(`
a = temp; }0z]sYI
} else { t}q\.
data[k] = temp[j--]; AI\|8[kf0
b = temp[j]; we;QrS(Hi
} T+U,?2nF:
} >,)tRQS
} N=@Nn)
97SOa.@
/** q}0xQjpo
* @param data @<,YUp,%S
* @param l b'$fr6"O1
* @param i p`2w\P3;)
*/ uKE?VNC]
private void insertSort(int[] data, int start, int len) { EX9os
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); |v31weD8
} t1MK5B5jH
} N#zh$0!8bJ
} sbV {RSl
} 5T- N\)@
P{gy/'PH,
堆排序： C3>`e3v
=#|K-X0d=
package org.rut.util.algorithm.support; %AnqT|\#,
1aBQ.-E-
import org.rut.util.algorithm.SortUtil; "[tb-$ER
&D*22R4{CX
/** %1^E;n
* @author treeroot mcqLN5
* @since 2006-2-2 r}Ec_0_lt
* @version 1.0 @_4E^KgF
*/ D*o5fPvFO
public class HeapSort implements SortUtil.Sort{ l6#ms!e
qGrUS_~q*
/* (non-Javadoc) .T|1l$Jn
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) i_M0P12
*/ 2~(\d\k
public void sort(int[] data) { 1'Y7h;\~\
MaxHeap h=new MaxHeap(); rI.CCPY~s
h.init(data); HyKv5S$
for(int i=0;i h.remove(); [)S&PK
System.arraycopy(h.queue,1,data,0,data.length); MWZH-aA(.
} O{w'i|
q6a7o=BP]
private static class MaxHeap{ D +Ui1h-
w:+wx/\
void init(int[] data){ Ti!<{>
this.queue=new int[data.length+1]; g6p:1;Evf
for(int i=0;i queue[++size]=data; n0rAOkW
fixUp(size); '&42E[0P
} gUtxyW
} `@)>5gW&p
9~ JeI/
private int size=0; 7ts`uI<E@7
oW\kJ>!
private int[] queue; Kp)H>~cL
R-lpsvDDL2
public int get() { |h(05Kbk
return queue[1]; tVFydN~
} 4<(U/58a*
`_Fxb@"R
public void remove() { z3l(4WP
SortUtil.swap(queue,1,size--); LCouDk(=`
fixDown(1); q9iHJ'lMD*
} MQvk& AX
file://fixdown s !XJ
private void fixDown(int k) { F*rsi7#!pG
int j; -}$mv
while ((j = k << 1) <= size) { a7YzX5n
if (j < size %26amp;%26amp; queue[j] j++; {$fd?| 9h
if (queue[k]>queue[j]) file://不用交换 l`k""f69W
break; pas^FT~
SortUtil.swap(queue,j,k); |O4LR,{G.w
k = j; %&Q9WMo
} U+2U#v=<
} tTcff9ee
private void fixUp(int k) { n1J;)VyR
while (k > 1) { }$E341@
int j = k >> 1; _KZ&/
if (queue[j]>queue[k]) wJ Qm7n-+
break; h5^qo ^;g7
SortUtil.swap(queue,j,k); FBGe s[,
k = j; PqVz^(Wz
} N6UPD11}6
} ` 5lW
jWjp0ii
} _ISaO C{2-
B57MzIZi]
} #WqpU.
5R}K8"d
SortUtil： m]D3ec\K'
8K@>BFk1.
package org.rut.util.algorithm; 9^<Y~rkm
5zi}OGtXv
import org.rut.util.algorithm.support.BubbleSort; V N<omi+4
import org.rut.util.algorithm.support.HeapSort; jL]Y;T8
import org.rut.util.algorithm.support.ImprovedMergeSort; #Bo3:B8
import org.rut.util.algorithm.support.ImprovedQuickSort; (N[R`LN
import org.rut.util.algorithm.support.InsertSort; A-*y[/
import org.rut.util.algorithm.support.MergeSort; 2PTAIm Rq
import org.rut.util.algorithm.support.QuickSort; #_?m.~`g[
import org.rut.util.algorithm.support.SelectionSort; tQ7:4._
import org.rut.util.algorithm.support.ShellSort; )~2~q7
7GG:1:2+>
/** >O$JS,
* @author treeroot zz**HwRt
* @since 2006-2-2 [ @ASAhV^+
* @version 1.0 &w'1
*/ e gdbv
public class SortUtil { |9Pi*)E
public final static int INSERT = 1; ;6AanwR6
public final static int BUBBLE = 2; \S]` { kY,
public final static int SELECTION = 3; YU,fx<c
public final static int SHELL = 4; Da-U@e!
public final static int QUICK = 5; V ah&)&n
public final static int IMPROVED_QUICK = 6; -,a@bF:
public final static int MERGE = 7; 1<;RI?R[9
public final static int IMPROVED_MERGE = 8; T]UrKj/iF
public final static int HEAP = 9; ,+GS.]8<
j{&$_
public static void sort(int[] data) { f~t5[D(\Q,
sort(data, IMPROVED_QUICK); tTE]j-uT
} $eiW2@
private static String[] name={ yE{\]j|Zf
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" OuMj%I
}; ?"-1QG
8.ej65r*
private static Sort[] impl=new Sort[]{ J?"v;.K|hU
new InsertSort(), ?XllPnuKt%
new BubbleSort(), M.3ULt8
new SelectionSort(), JA2oy09G
new ShellSort(), 7KJ%-&L^
new QuickSort(), \&\U&^?
new ImprovedQuickSort(), D5"Xjo*
new MergeSort(), MN^d28^/
new ImprovedMergeSort(), m(KBg'kQ
new HeapSort() w\lc;4U
}; \N[2-;[3
l8H8c &
public static String toString(int algorithm){ +%=lu14G
return name[algorithm-1]; MREB
} >UnLq:G
]O&\Pn0q
public static void sort(int[] data, int algorithm) { 3Pgld*i7
impl[algorithm-1].sort(data); Z9q1z~qSQ
} ac%x\e$
LARMZoyi
public static interface Sort { k@P?,r
public void sort(int[] data); LZ}m;
} p\22_m_wd
5$&',v(
public static void swap(int[] data, int i, int j) { utU;M*
int temp = data; 5Zuk`%O
data = data[j]; h@CP
data[j] = temp; aIo%~w
} +FH@|~^O
} V='A;gs