[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; DGNn#DP
} P=R-1V
int i1=l; zJov*^T-C
int i2=mid+1; yX/{eX5dr
for(int cur=l;cur<=r;cur++){ $N\k*=
if(i1==mid+1) 8&yI1XM|
data[cur]=temp[i2++]; UT0}Ce>e
else if(i2>r) GI6]Ecc
data[cur]=temp[i1++]; \&[(PNl
else if(temp[i1] data[cur]=temp[i1++]; LZ RP}|
else K%1`LT5:~
data[cur]=temp[i2++]; ehTv@2b
} D!&]jkUN
} F ESl#.}
Uo;a$sR
} DMlr%)@{
Vllxv6/_
改进后的归并排序: Zxh<pd25Y
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package org.rut.util.algorithm.support; 3Uej]}c
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import org.rut.util.algorithm.SortUtil; zwk&3
O_L>We@3E
/** a[p$e?gka
* @author treeroot 2S-f5&o
* @since 2006-2-2 s"R5'W\U
* @version 1.0 N5zx#g
*/ -F_cBu81V
public class ImprovedMergeSort implements SortUtil.Sort { `\GRY @cg
\,'4eV
private static final int THRESHOLD = 10; qiH)J- ~GZ
J&&)%&h'I
/* }42Hhu7j
* (non-Javadoc) E;wT4 T=
* ZsSW{ffZ77
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) FmSE]et
*/ 2#/23(Wc
public void sort(int[] data) { #x`K4f)
int[] temp=new int[data.length]; |AS~sjWSJ
mergeSort(data,temp,0,data.length-1); ae" o|Q
} A]ZQ?-L/
_}F_Q5)
private void mergeSort(int[] data, int[] temp, int l, int r) { sDAP'&
int i, j, k; E1SWZ&';
int mid = (l + r) / 2; bo1J'pU
if (l == r) sf/m@425
return; TbLU[(m-n
if ((mid - l) >= THRESHOLD) ~'F.tB
mergeSort(data, temp, l, mid); (4?^X
else =cO5Nt
insertSort(data, l, mid - l + 1); IwRP,MQ~
if ((r - mid) > THRESHOLD) rgDl%X2B
mergeSort(data, temp, mid + 1, r); >@Pw{Zh$
else &XCP@@T
insertSort(data, mid + 1, r - mid); wY ??#pS
uQ|LkL%<^
for (i = l; i <= mid; i++) { 4ETHaIiWp
temp = data; TU':Rt
} {{?MO{Mh*
for (j = 1; j <= r - mid; j++) { #%w+PL:*O
temp[r - j + 1] = data[j + mid]; maeQ'Sv_&
} oY0*2~sg
int a = temp[l]; t2Jf+t_B7
int b = temp[r]; %!eRR
for (i = l, j = r, k = l; k <= r; k++) { G|RBwl
if (a < b) { =CO) Q2
data[k] = temp[i++]; B!&y>Z^$
a = temp; o")"^@Zhi
} else { h?v8b+:0
data[k] = temp[j--]; :aBm,q9i:}
b = temp[j]; TQb@szp:|
} rIb~@cR)
} y4l-o
} H4sW%nZ0
m(o`;
/** { ^^5FE)%
* @param data OQ4Pk/-'
* @param l q%QvBN
* @param i J5n6K$.d
*/ Hzj8o3
private void insertSort(int[] data, int start, int len) { Ghc U~
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); %?, 7!|Ls
} !#~KSO}zW2
} Uk*(C(
} v_Df+
} Z=Cw7E
w>8kBQ?b
堆排序： &-{%G=5~e%
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package org.rut.util.algorithm.support; QmSMDWkh
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import org.rut.util.algorithm.SortUtil; zyO=x4U8
W -HOl!)
/** }EYmz/nN
* @author treeroot *C0a,G4
* @since 2006-2-2 8EMBqhl
* @version 1.0 cvo+{u$s
*/ K F_Uu
public class HeapSort implements SortUtil.Sort{ x;`Gn_
)+|wrK:*v
/* (non-Javadoc) ~cyKPg6
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ^#C+l
*/ U;TS7A3
public void sort(int[] data) { |vm-(HY!
MaxHeap h=new MaxHeap(); jSM`bE+"
h.init(data); OI*ltba?
for(int i=0;i h.remove(); Ly3!0P.<
System.arraycopy(h.queue,1,data,0,data.length); d}tmZ*q
} 4n@>gW
uD?RL~M
private static class MaxHeap{ \At~94
GF9[|). T
void init(int[] data){ \!30t1EZ
this.queue=new int[data.length+1]; $]Ix(7@W
for(int i=0;i queue[++size]=data; tu"-]^
fixUp(size); 1*G&ZI
} f0Q! lMv
} AZE%fOG<i
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private int size=0; }!k?.(hpE
9H;Os:"\|
private int[] queue; }yn%_KQ0
gK;dfrU.8Y
public int get() { qoH:_o8ClO
return queue[1]; {5D%<Te
} aMGh$\Pg
fa,:d8
public void remove() { ,jeHL@>w[
SortUtil.swap(queue,1,size--); 74:( -vS
fixDown(1); Te~jYkCd
} |f$ws R`&
file://fixdown f*rub. y
private void fixDown(int k) { jD"nEp-
int j; p7Zeudmj
while ((j = k << 1) <= size) { llR5qq=t
if (j < size %26amp;%26amp; queue[j] j++; )m3emMO2
if (queue[k]>queue[j]) file://不用交换 Q:7P /
break; <*z'sUh+}
SortUtil.swap(queue,j,k); T^vo9~N*
k = j; E;4B!"Q8
} ?Fa$lE4
} &Ep$<kx8
private void fixUp(int k) { X_nbNql
while (k > 1) { Ye4 &4t
int j = k >> 1; tDah@_
if (queue[j]>queue[k]) `>g\gaQ
break; [ ^\{>m7
SortUtil.swap(queue,j,k); T+~&jC:{
k = j; H1%o)'Kut4
} l{.PyU5)
} *0@Z+'M?
PPrvVGP
} ewN|">WXQ
3I)oqS@q'
} I4w``""c
%%n&z6w-
SortUtil： Fje /;p
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package org.rut.util.algorithm; 4clCZ@\K^
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import org.rut.util.algorithm.support.BubbleSort; B*3_m _a
import org.rut.util.algorithm.support.HeapSort; ~N| aCi-X
import org.rut.util.algorithm.support.ImprovedMergeSort; bA Yp }
import org.rut.util.algorithm.support.ImprovedQuickSort; NX(IX6^y
import org.rut.util.algorithm.support.InsertSort; SeS ZMv
import org.rut.util.algorithm.support.MergeSort; G7,v:dlK
import org.rut.util.algorithm.support.QuickSort; 7b-[# g
import org.rut.util.algorithm.support.SelectionSort; 9Z=hg[`]<
import org.rut.util.algorithm.support.ShellSort; kSol%C
*P7n YjG
/** `|"o\Bg<
* @author treeroot :jkPV%!~
* @since 2006-2-2 fj(WHL
* @version 1.0 @ YWuWF
*/ 2Hx*kh2
public class SortUtil { yB*aG
public final static int INSERT = 1; -{JReplc
public final static int BUBBLE = 2; K iXD1Zpz
public final static int SELECTION = 3; s nxwe
public final static int SHELL = 4; v,N!cp1
public final static int QUICK = 5; WdC7CK
public final static int IMPROVED_QUICK = 6; f>mEX='w
public final static int MERGE = 7; ;sf'"UnL
public final static int IMPROVED_MERGE = 8; rGt]YG#C
public final static int HEAP = 9; W^ask[46R
}3XjP55
public static void sort(int[] data) { 7KRNTnd
sort(data, IMPROVED_QUICK); v6aMYmenBH
} K)`R?CZ:s
private static String[] name={ d3?gh[$
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 1 rbc}e
}; {i3x\|
I 6<LKI/
private static Sort[] impl=new Sort[]{ hZUS#75M5
new InsertSort(), jL4"FTcE]3
new BubbleSort(), RN1KM
new SelectionSort(), hhylsm
new ShellSort(), =8p[ (<F=
new QuickSort(), jamai8
new ImprovedQuickSort(), }l]r-
new MergeSort(), HP3%CB
new ImprovedMergeSort(), <>-gQ9
new HeapSort() M_75bU
}; Ud>hDOJ3
hN1[*cF
public static String toString(int algorithm){ n],cs
return name[algorithm-1]; 4T&Jlu?:
} p{r{}iYI
R~TG5^(
public static void sort(int[] data, int algorithm) { ko!aX;K
impl[algorithm-1].sort(data); B1i'Mzm-4
} \[+':o`LH
ZWx[@5
public static interface Sort { QiRx2Z*\
public void sort(int[] data); }!s$ /Kn
} [ CU8%%7
1_}k)(n
public static void swap(int[] data, int i, int j) { ih:%U
int temp = data; cx)x="c
data = data[j]; J[K>)@I/
data[j] = temp; _A]~`/0;`
} #LwDs,J:
} B]7QOf"