[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; FGey%:p9$
} <y2HzBC
int i1=l; J`[v u4
int i2=mid+1; 2L(\-]%f
for(int cur=l;cur<=r;cur++){ 7.y35y
if(i1==mid+1) ^B?brH}
data[cur]=temp[i2++]; n@te.,?A"
else if(i2>r) SNOML7pd
data[cur]=temp[i1++]; DJJd_
else if(temp[i1] data[cur]=temp[i1++]; MXa(Oi2Gg
else -]. a0
data[cur]=temp[i2++]; Dbg,|UH
} g-LMct8$
} q|zips,
G%F}H/|R
} `UD,ne
=@ d/SZ|(E
改进后的归并排序: HT%'dZ1
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package org.rut.util.algorithm.support; p#aB0H3
zL!}YR@&u"
import org.rut.util.algorithm.SortUtil; S&J>15oWM`
{oftZXwf
/** s+<`iH9Hm
* @author treeroot xOt {Vsv
* @since 2006-2-2 %'w?fqk
* @version 1.0 3C gmZ7[
*/ ty\F~]Oo
public class ImprovedMergeSort implements SortUtil.Sort { OPuty/^!Gw
S;K5JBX0#
private static final int THRESHOLD = 10; rbl7-xhC7
nKnQ%R
/* SVn $!t
* (non-Javadoc) =&t]R? F
* kyH0J[/n
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 9)*218.
*/ i4}+n^oSYo
public void sort(int[] data) { 2|A?9aE%0
int[] temp=new int[data.length]; k?;@5r)y-
mergeSort(data,temp,0,data.length-1); qYP;`L}o#
} J{U 171
]%2y`Jrl^W
private void mergeSort(int[] data, int[] temp, int l, int r) { 6]|-%
int i, j, k; z'&tmje[?
int mid = (l + r) / 2; z 4qEC
if (l == r) _;mA(j
return; 8RA
if ((mid - l) >= THRESHOLD) Q2Dh(
mergeSort(data, temp, l, mid); _$KEE|9
else ,4HZ-|EOZ
insertSort(data, l, mid - l + 1); "F:V$,mJ
if ((r - mid) > THRESHOLD) 1|dXbyUd
mergeSort(data, temp, mid + 1, r); N c(f+8
else \7PC2IsT3
insertSort(data, mid + 1, r - mid); Wud-(19
q8!X^1F7
for (i = l; i <= mid; i++) { F4]=(T
temp = data; `-w,6
} WX* uhR
for (j = 1; j <= r - mid; j++) { 8o i{%C&-
temp[r - j + 1] = data[j + mid]; u<JkP <"S
} x~QZVL=:
int a = temp[l]; 2. q\!V}yQ
int b = temp[r]; l4gZHMh'
for (i = l, j = r, k = l; k <= r; k++) { #.{ddY{
if (a < b) { kgHZaQnD
data[k] = temp[i++]; ?kULR0uL+
a = temp; W3gHzT?{
} else { "&C>=
data[k] = temp[j--]; z&Xk~R*$
b = temp[j]; 0TaN#
} ue1g(;
} t|m=X
} WD@v<Wx)
H`s[=Y,m
/** ws<pBC,m
* @param data .*B@1q
* @param l E[Q2ZqhgbP
* @param i wGw<z[:f
*/ op($+Q
private void insertSort(int[] data, int start, int len) { O7oq1JI]Y
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); uD\rmO{
} 3 MCV?"0
} a@^)?cH!z
} biG :Xn
} 3BSZz%va
}wZsM[NDB
堆排序： :JU$6
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package org.rut.util.algorithm.support; d&lT/S
S$=caZ?
import org.rut.util.algorithm.SortUtil; J1w,;T\55
seVT|z
/** }.1}yz^y
* @author treeroot +;,X?E]g
* @since 2006-2-2 %\L{Ud%7
* @version 1.0 5+2qx)FZ
*/ :F_>`{
public class HeapSort implements SortUtil.Sort{ '~VF*i^4
rZ&li/Z
/* (non-Javadoc) "E@A~<RKP
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) z31g"
*/ nRyx2\Py+
public void sort(int[] data) { yeam-8
MaxHeap h=new MaxHeap(); ,Jx.Kj.,
h.init(data); Pk;1q?tGw
for(int i=0;i h.remove(); .X5A7 m
System.arraycopy(h.queue,1,data,0,data.length); F:sUGM,
} {e5-
Jn%Etz-
private static class MaxHeap{ e8M0Lz#}
8JXS:J.|v
void init(int[] data){ #qARcxbK|
this.queue=new int[data.length+1]; _>bk'V7
for(int i=0;i queue[++size]=data; TK0WfWch
fixUp(size); >)HKruSW.
} BMtk/r/
} 2FY]o~@
=y>CO:^G%
private int size=0; \Xe{vlo>h
r$<M*z5q(\
private int[] queue; G#~U\QlG-
yg4#,4---b
public int get() { $rJgBN
return queue[1]; k7& cc|y
} ]Ot=At
4aKppj
public void remove() { RXo6y(^
SortUtil.swap(queue,1,size--); hu>wcOt
fixDown(1); '#>Fe`[
} `.Zm}'
file://fixdown lavy?tFer
private void fixDown(int k) { $1FnjL5u
int j; BC5R$W.e
while ((j = k << 1) <= size) { q VavP6I
if (j < size %26amp;%26amp; queue[j] j++; /([a%,DI
if (queue[k]>queue[j]) file://不用交换 ^M\X/uq$E
break; \}\# fg
SortUtil.swap(queue,j,k); O`I}Lg]~q
k = j; ~~O4!|t
} ,fhF-%Q!g
} #guK&?Fye
private void fixUp(int k) { "$P/ek
while (k > 1) { I%($,kd}s
int j = k >> 1; U5OFw+J
if (queue[j]>queue[k]) #M<YNuE#"
break; F'"-aB ~
SortUtil.swap(queue,j,k); i(ZzE
k = j; HCx0'|J
} 8Zy*#[-
} hgbf"J6V8
\6bvk_
} Igw2n{})w
^*+j7A.n
} EPA 2_
mwMu1#
SortUtil： 4`ZoAr-5|
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package org.rut.util.algorithm; %zo 6A1Q;
*>HS>#S
import org.rut.util.algorithm.support.BubbleSort; s8'!1rHd
import org.rut.util.algorithm.support.HeapSort; ]o8yZ x
import org.rut.util.algorithm.support.ImprovedMergeSort; fqBz"l>5A
import org.rut.util.algorithm.support.ImprovedQuickSort; (XlvPcTi
import org.rut.util.algorithm.support.InsertSort; HH0ck(u_A*
import org.rut.util.algorithm.support.MergeSort; /0!.u[t)~
import org.rut.util.algorithm.support.QuickSort; zqURnsJ
import org.rut.util.algorithm.support.SelectionSort; ';}:*nZ//_
import org.rut.util.algorithm.support.ShellSort; 'n^?DPvD
j&U7xv
/** Vk2%yw>
* @author treeroot Efoy]6P\
* @since 2006-2-2 TU;AO%5
* @version 1.0 qu!x#OY+
*/ 9I`0`o"A
public class SortUtil { `gF`Sgz
public final static int INSERT = 1; <f=<r*6
public final static int BUBBLE = 2; O3)B]!xL
public final static int SELECTION = 3; hsJ^Au=})w
public final static int SHELL = 4; 6G#[Mc yn
public final static int QUICK = 5; `t44.=%
public final static int IMPROVED_QUICK = 6; ;#+I"Ow
public final static int MERGE = 7; ]HB1JJiS~
public final static int IMPROVED_MERGE = 8; BG)zkn$
public final static int HEAP = 9; t,'J%)j
v;-0^s/P
public static void sort(int[] data) { >5?c93?
sort(data, IMPROVED_QUICK); kw} E0uY
} j+S&5C/{
private static String[] name={ *M$mAy<
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ^hr# 1
}; Ui-Y`
4=`1C-v?q
private static Sort[] impl=new Sort[]{ X$G:3uoN
new InsertSort(), r\}?HS06
new BubbleSort(), \){_\{&
new SelectionSort(), Pa#Jwo
new ShellSort(), X}5"ZLa7l
new QuickSort(), Yakrsi/jV}
new ImprovedQuickSort(), UtC<TBr
new MergeSort(), \So)g)K
new ImprovedMergeSort(), P[$idRS&
new HeapSort() P.g./8N`z
}; Nq^o8q_
Hyenn
public static String toString(int algorithm){ ,Z :2ba
return name[algorithm-1]; eD3\>Y.z
} mkPqxzxbrL
MiKq|
public static void sort(int[] data, int algorithm) { M= |is*t
impl[algorithm-1].sort(data); `c|H^*RC
} Z0O0Q=e\Y
B*E"yB\NV
public static interface Sort { I[gPW7&S@
public void sort(int[] data); WvoIh4]
} 9$qw&j[
-e?n4YO*\
public static void swap(int[] data, int i, int j) { DZLEx{cm
int temp = data; ?R4u>AHS@
data = data[j]; ,\1Rf.
data[j] = temp; N)a5~<fBG
} {?++T 0
} '66nqJb*