[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; 6 8n ;#-X
} l8(9?!C
int i1=l; yw:%)b{
int i2=mid+1; $k)K}U
for(int cur=l;cur<=r;cur++){ %6@)fRw
if(i1==mid+1) _)<5c!
data[cur]=temp[i2++]; |LJv*
else if(i2>r) c nv%J}wq
data[cur]=temp[i1++]; bBML +0a
else if(temp[i1] data[cur]=temp[i1++]; %CnVK1u!
else 8J&9}@y
data[cur]=temp[i2++]; ~pp< T
} q p}2
} UVLS?1ra
a0]GQyIG
} 03)irq%l;
}@6yROy.
改进后的归并排序: PW%ith1)<
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package org.rut.util.algorithm.support; %"c;kvw
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import org.rut.util.algorithm.SortUtil; jtfC3E,U
B>'J5bZsw
/** %!-t7K^mFq
* @author treeroot gktlwiCZ
* @since 2006-2-2 n%\\1
* @version 1.0 + AjV0#n
*/ GD}rsBQNkJ
public class ImprovedMergeSort implements SortUtil.Sort { dk1q9Tx
=>>Dnp
private static final int THRESHOLD = 10; [7x;H
":T"Y;
/* LjGLi>kI~
* (non-Javadoc) fh_:ung
* M@q)\UQ'
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) `ba<eT':
*/ wp8-(E^
public void sort(int[] data) { t:lDFv4s
int[] temp=new int[data.length]; S9[Up}`
mergeSort(data,temp,0,data.length-1); Dz.kJ_"Ro
} zN9@.!?X2
8Dxg6>
private void mergeSort(int[] data, int[] temp, int l, int r) { c 3| Lk7Q
int i, j, k; z,C>Rh9Id
int mid = (l + r) / 2; >d .|I&
if (l == r) V^D1:9i
return; p+Bvfn
if ((mid - l) >= THRESHOLD) *WzPxQ_
mergeSort(data, temp, l, mid); LM"b%
else WH $*\IGJL
insertSort(data, l, mid - l + 1); #Sg/
if ((r - mid) > THRESHOLD) <;+QK=f
mergeSort(data, temp, mid + 1, r); )('{q}JxV
else wN0?~
insertSort(data, mid + 1, r - mid); tx3p, X
c7?|Tipc
for (i = l; i <= mid; i++) { -xH3}K%
temp = data; [daR)C
} aeLIs SEx
for (j = 1; j <= r - mid; j++) { {[H#lX 4
temp[r - j + 1] = data[j + mid]; TxkvHiq2
} odcrP\S
int a = temp[l]; ]%Whtj.,x7
int b = temp[r]; /xA`VyHO
for (i = l, j = r, k = l; k <= r; k++) { {;UBW7{
if (a < b) { +x:VIi
data[k] = temp[i++]; M@.?l=1X
a = temp; Q6X}R,KA1
} else { [nsTO5G$u
data[k] = temp[j--]; eLN(NSPoS
b = temp[j]; k|_ >I
} ON_GD"
} ?0E-Lac=
} 7 Uu
BS3BJwf; f
/** C%Op[H3
* @param data |-AR)Smt
* @param l `p^xdj}
* @param i M^A;tPw
*/ 1\,wV,
private void insertSort(int[] data, int start, int len) { GZFLJu
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); !3at(+4
} b(g?X (&
} 2ld0w=?+eu
} .3,Ow(3l
} $0E_4#kwB
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堆排序： fNi_C"<
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package org.rut.util.algorithm.support; m4T`Tg#P
Op<|Oz$Q|l
import org.rut.util.algorithm.SortUtil; J 9k~cz
^Ul*Nm
/** gI~jf- w
* @author treeroot !;C *Wsp}
* @since 2006-2-2 }NJ? .Y
* @version 1.0 MU&P+Wr
*/ G@n%P~
public class HeapSort implements SortUtil.Sort{ xSHeP`P^X
h|'T'l&z
/* (non-Javadoc) $lrq*Nf9c
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 9Lxj ]W2^
*/ NCysYmt
public void sort(int[] data) { R'r^v
MaxHeap h=new MaxHeap(); {utIaMb]&v
h.init(data); sh"\ kk9
for(int i=0;i h.remove(); mI~k@!3
System.arraycopy(h.queue,1,data,0,data.length); PUViTb
} Z-+p+34ytq
q[SUYb;,
private static class MaxHeap{ sj@'C@oK
ojitBo~
void init(int[] data){ 9WuKW***
this.queue=new int[data.length+1]; #_bSWV4
for(int i=0;i queue[++size]=data; Ci ? +Sl
fixUp(size); &H{KXX"X
} 8BZDaiE"
} Y<S,Xr;J:
(HkMubnqg
private int size=0; b|*A%?m
=e,2/Ep{i
private int[] queue; AjZ@hid
d(L u|/~
public int get() { @BN cIJk9
return queue[1]; #9Z*.
} q*<Df=+B
'N0/;k0ax
public void remove() { *Gm%Dn
SortUtil.swap(queue,1,size--); P$\vD^
fixDown(1); V<@]Iv
} &k?Mt#J
file://fixdown Rd5r~iT
private void fixDown(int k) { $vdGkz@6
int j; J~:/,'Ea
while ((j = k << 1) <= size) { *~|xj,md
if (j < size %26amp;%26amp; queue[j] j++; H0s,tTK8
if (queue[k]>queue[j]) file://不用交换 !_cT_ WHty
break; TUiXE~8=
SortUtil.swap(queue,j,k); c)M_&?J!5
k = j; q7wd96G:
} >b0e"eGt
} 'wX'}3_/g
private void fixUp(int k) { d3(T=9;f2
while (k > 1) { X.g")Bt7
int j = k >> 1; l\*}
if (queue[j]>queue[k]) Db= iJ68
break; 2|#3rF
SortUtil.swap(queue,j,k); 59p'Ega.
k = j; BjJ$I^
} >b |l6#%
} }yU,_:
(6?pBdZ
} Srz.-,2PF
Vl?R?K=`~J
} s0.yPA
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SortUtil： #Qy*zU#9
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package org.rut.util.algorithm; ?4_^}B9
M>0=A
import org.rut.util.algorithm.support.BubbleSort; cu|#AW
import org.rut.util.algorithm.support.HeapSort; >NW /0'/
import org.rut.util.algorithm.support.ImprovedMergeSort; +?(2-RBd
import org.rut.util.algorithm.support.ImprovedQuickSort; yc4mWB~gyU
import org.rut.util.algorithm.support.InsertSort; -";'l@D=
import org.rut.util.algorithm.support.MergeSort; M&y!w
import org.rut.util.algorithm.support.QuickSort; ZqkP# ]+Y'
import org.rut.util.algorithm.support.SelectionSort; _4rb7"b1
import org.rut.util.algorithm.support.ShellSort; Y1Bj++?2
l@<^V N@
/** /%rbXrR4w
* @author treeroot czb(&><
* @since 2006-2-2 {`KgyCW:
* @version 1.0 PQXyu1
*/ lyIstfRh15
public class SortUtil { 9.lSF
public final static int INSERT = 1; brNe13d3~"
public final static int BUBBLE = 2; usR19_E-
public final static int SELECTION = 3; rNqJL_!
public final static int SHELL = 4; X!CLOHVAa
public final static int QUICK = 5; <=cj)
public final static int IMPROVED_QUICK = 6; Yiu)0\ o
public final static int MERGE = 7; ?qw&H /R
public final static int IMPROVED_MERGE = 8; } ~=53$+
public final static int HEAP = 9; xh@H@Q\
Gc4N)oq)}b
public static void sort(int[] data) { &.=d,XKN
sort(data, IMPROVED_QUICK); )(\5Wk9(
} gUL`)t\}*
private static String[] name={ "a5?cX;
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" `wB(J%w
}; *0l^/jqn:
_7]5Q
private static Sort[] impl=new Sort[]{ C?bPdJ,6
new InsertSort(), {NKDmeg:D
new BubbleSort(), 8_Y{7;<ey
new SelectionSort(), //Hn[wEOh
new ShellSort(), uc=-+*D'I
new QuickSort(), KTBsH;6
new ImprovedQuickSort(), *ta|,
new MergeSort(), H=Yl @
new ImprovedMergeSort(), g}$]K!F
new HeapSort() kd|@.
}; ^z9ITGB~tV
o*f7/ZP1o
public static String toString(int algorithm){ 4eBM/i
return name[algorithm-1]; 8cfxKUS
} `"zX<
}n:'@}
public static void sort(int[] data, int algorithm) { zJ3{!E}`v
impl[algorithm-1].sort(data); qK.8^{b
} R7ZxS
-g;iMqh#
public static interface Sort { lY.FmF}k
public void sort(int[] data); @]Iku6d-
} 3UslVj1u
< I8hy$+6
public static void swap(int[] data, int i, int j) { f/*Xw{s#
int temp = data; 7$Bq.Lc#z
data = data[j]; ,hT t]w
data[j] = temp; -?2ThvT
} ~BrERUk
} 5z5#_*)O