[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; 00s)=A_
} ?Z4%u8Krvz
int i1=l; Vy|4k2
int i2=mid+1; Rry]6(
for(int cur=l;cur<=r;cur++){ -rjQ^ze
if(i1==mid+1) WRA(k
data[cur]=temp[i2++]; i~AReJxt7
else if(i2>r) Gg]Jp:GF
data[cur]=temp[i1++]; %rgW}Z5
else if(temp[i1] data[cur]=temp[i1++]; =F Y2O`%a
else pq\N2d
data[cur]=temp[i2++]; Hq,@j{($
} tl*h"du^
} 8h4]<T
"nb.!OG~(
} ~R~.D
7&OJ8B/
改进后的归并排序: ~t/i0pKq.
x,cvAbwS
package org.rut.util.algorithm.support; c`UFNNm=
5W&L cBB
import org.rut.util.algorithm.SortUtil; 6$f\#TR
3:8p="$F
/** >p0,]-.J,r
* @author treeroot WC37=8mA
* @since 2006-2-2 zUNUH^Il
* @version 1.0 _h1eW9q
*/ ZBFn
public class ImprovedMergeSort implements SortUtil.Sort { km][QEXs%
>}Bcv%zZ
private static final int THRESHOLD = 10; L|:CQ
/#&jF:h
/* 2"6qg>]-t
* (non-Javadoc) ^W9O_5\g4a
* _Gaem"k|
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) arRU`6?
*/ >;bym)
public void sort(int[] data) { _Y/*e<bU
int[] temp=new int[data.length]; HZ}Igw.Z
mergeSort(data,temp,0,data.length-1); =J]EVD
} *}';q`u}
HB$?}V
private void mergeSort(int[] data, int[] temp, int l, int r) { -:"KFc8A
int i, j, k; EY3F9h3xM|
int mid = (l + r) / 2; 4\p%|G^hU
if (l == r) mk^,{D
return; dKC*QHU
if ((mid - l) >= THRESHOLD) 7:Rt) EE2
mergeSort(data, temp, l, mid); U<q`f-
else &Td)2Wt
insertSort(data, l, mid - l + 1); wfEL .h
if ((r - mid) > THRESHOLD) ~e]B[>PT
mergeSort(data, temp, mid + 1, r); }&v-<qC^
else HwZl"!;Mry
insertSort(data, mid + 1, r - mid); HC1<zW[
nCp_RJu
for (i = l; i <= mid; i++) { e57R6g)4
temp = data; b SgbvnJ
} ~k?wnw
for (j = 1; j <= r - mid; j++) { }{=}^c"t'
temp[r - j + 1] = data[j + mid]; bJ1Nf|3~E
} TXXG0 G
int a = temp[l]; u0,QsD)_X0
int b = temp[r]; )bL(\~0g~
for (i = l, j = r, k = l; k <= r; k++) { n-],!pL^
if (a < b) { ?daxb
data[k] = temp[i++]; TF5jTpGq
a = temp; o|y_j49
} else { H_t0$x(\
data[k] = temp[j--]; vr{|ubG]d
b = temp[j]; $w <R".4
} QRrAyRf[
} %8%|6^,
} %#~wFW|]x
CDXN%~0h
/** T0"nzukd
* @param data >3B{sn}
* @param l L-rV+?i`6f
* @param i izGU&VeB
*/ }$L1A
private void insertSort(int[] data, int start, int len) { Q_!tn*
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 2#3`[+g<n
} <H-kR\HF
} MMC$c=4"
} %t!r pyD
} im9EV|;
pU<J?cU8N
堆排序： bc~$"
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package org.rut.util.algorithm.support; cn/&QA"
~6Fh,S1?
import org.rut.util.algorithm.SortUtil; 5mpql[v3P
-3~S{)
/** He5y;5
* @author treeroot =q)+_@24>d
* @since 2006-2-2 UR=s=G|
* @version 1.0 W2h4ej\s
*/ m9MYd
public class HeapSort implements SortUtil.Sort{ l;A'^
\v\ONp"
/* (non-Javadoc) );TB(PQsBT
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ;-Os~81o?
*/ P]y{3y:XxM
public void sort(int[] data) { <YEKbnw$o
MaxHeap h=new MaxHeap(); O-)[!8r
h.init(data); AB,(%JT/2{
for(int i=0;i h.remove(); s-'~t#h
System.arraycopy(h.queue,1,data,0,data.length); EA1&D^nT
} ss}-YnG
4g2`[<S
private static class MaxHeap{ Rx"+i0
$6J22m!S4n
void init(int[] data){ r(Z?Fs/
this.queue=new int[data.length+1]; Gf9sexn]l
for(int i=0;i queue[++size]=data; &Ejhw3Nw
fixUp(size); bpU>(j
} cZF|oZ6<
} QGV#AID3XW
bV2a2#kj
private int size=0; J%xUO1
)B&`<1Oie
private int[] queue; +zk5du^gZ
wme#8/eUk
public int get() { MZf?48"f
return queue[1]; 4gev^/^^
} ^[}W}j>
.>[l@x"
public void remove() { Cg~1<J?2
SortUtil.swap(queue,1,size--); cr]b #z
fixDown(1); l/B+k
} i<>%y*+@
file://fixdown L>E;cDB
private void fixDown(int k) { \?Z7|
int j; ):Z#!O<
while ((j = k << 1) <= size) { oMLs22Do?
if (j < size %26amp;%26amp; queue[j] j++; p^q/u
if (queue[k]>queue[j]) file://不用交换 +cYDz#3%
break; \>wQyz
SortUtil.swap(queue,j,k); \nWbGS(
k = j; 7BwR ].
} OgQ8yKfDB
} i%<NKE;v7m
private void fixUp(int k) { 0QPY+6
while (k > 1) { O`%F{&;29
int j = k >> 1; -bdWG]w"
if (queue[j]>queue[k]) m;rr7{7X
break; 8tv4_Lbx
SortUtil.swap(queue,j,k); C@]D*k
k = j; Bfo#N31F}
} Whp`\E<<
} 5bXpj86mY
P2`F" Qsq
} (;05=DsO
WoB'B|%
} H<q|je}e
I9aiAD0s
SortUtil： 0m.`$nlV-
<*^|Aj|#
package org.rut.util.algorithm; kb"Fw:0
q27q/q8
import org.rut.util.algorithm.support.BubbleSort; `EvO^L
import org.rut.util.algorithm.support.HeapSort; M[O22wFs
import org.rut.util.algorithm.support.ImprovedMergeSort; fJ _MuAv
import org.rut.util.algorithm.support.ImprovedQuickSort; R<Mp$K^b
import org.rut.util.algorithm.support.InsertSort; {:_*P TVk
import org.rut.util.algorithm.support.MergeSort; =?+w5oI0
import org.rut.util.algorithm.support.QuickSort; T95FoA
import org.rut.util.algorithm.support.SelectionSort; _7';1 D
import org.rut.util.algorithm.support.ShellSort; \h s7>5O^K
-}sMOy`
/** XY9%aT*
* @author treeroot $0P16ZlPC
* @since 2006-2-2 D$H&^,?N
* @version 1.0 ''q;yKpaz
*/ >Je$WE3
public class SortUtil { )G, S7A
public final static int INSERT = 1; kCz2uG)l
public final static int BUBBLE = 2; }aa]1X(u
public final static int SELECTION = 3; /g9^g(
public final static int SHELL = 4; R)$]r>YZF
public final static int QUICK = 5; <Z_\2 YWA
public final static int IMPROVED_QUICK = 6; TC'SDDX
public final static int MERGE = 7; -$=RQH$9
public final static int IMPROVED_MERGE = 8; aQY.96yo
public final static int HEAP = 9; _dAn/rj
9 ;uw3vI%
public static void sort(int[] data) { BdU .;_K
sort(data, IMPROVED_QUICK); ?G~rYETvw
} bf1$:09
private static String[] name={ 0LzS #J+
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" $RF.LVc
}; Pj g#
('j'>"1H
private static Sort[] impl=new Sort[]{ g[@0H=
new InsertSort(), Ge?DD,ac
new BubbleSort(), )g $T%
new SelectionSort(), XH*(zTd(?
new ShellSort(), 1>OU~A"
new QuickSort(), U61 LMH
new ImprovedQuickSort(), Zm++5b`W/[
new MergeSort(), #n.v#FyNx
new ImprovedMergeSort(), IQ~Anp^R
new HeapSort() 5"!K8 N
}; D,FgX/&i/
.-MJ5d:
public static String toString(int algorithm){ jw\4`NZ]
return name[algorithm-1]; Xm(#O1Vm(l
} %t1Z!xv_
>,k2|m
public static void sort(int[] data, int algorithm) { u6Ux nqNc
impl[algorithm-1].sort(data); #wvGS%
} ;Z"Iv
iGj,B =35
public static interface Sort { rAW7Zp~KK
public void sort(int[] data); ;H71A[M T
} g}hNsU=$5~
+gBDE:
public static void swap(int[] data, int i, int j) { u|"YS-dH
int temp = data; `O.pT{Lf
data = data[j]; .),9a,
data[j] = temp; 'zMmJl}\vd
} F/tRyq`D
} Wie0r@5E