[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; |O|V-f{l
} |!3DPA(_
int i1=l; 4iazNl#
int i2=mid+1; w!-gJmX>
for(int cur=l;cur<=r;cur++){ ghG**3xr
if(i1==mid+1) {j?FNOJn
data[cur]=temp[i2++]; *SDs;kg
else if(i2>r) N1}sHyVq7
data[cur]=temp[i1++]; u<tbbKM
else if(temp[i1] data[cur]=temp[i1++]; yy^q2P
else '4+ ur`
data[cur]=temp[i2++]; {9&;Q|D z
} !Y0Vid
} DrUO-
i(%W_d!
} 2^[`eg
TOB-aAO
改进后的归并排序: }%ojw |
nLZTK&7}
package org.rut.util.algorithm.support; pk$l+sNZ=
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import org.rut.util.algorithm.SortUtil; OUPUixz2Z
~S"+S/z/k
/** ifMRryN4
* @author treeroot wo;~7K
* @since 2006-2-2 7Jyy z,!5
* @version 1.0 en4k/w_
*/ a od-3"7[
public class ImprovedMergeSort implements SortUtil.Sort { |}s*E_/[
'j8:vq^d
private static final int THRESHOLD = 10; u"cV%(#
*eTqVG.
/* bQg:zww
* (non-Javadoc) Ha0M)0Anv
* p J! mw\:
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) /!yU!`bY
*/ OhQgF
public void sort(int[] data) { %op**@4/t\
int[] temp=new int[data.length]; Q^9_'t}X
mergeSort(data,temp,0,data.length-1); / |;RV"
} _lJ!R:*
%A9NB!
private void mergeSort(int[] data, int[] temp, int l, int r) { |PCm01NU!
int i, j, k; )np:lL$$
int mid = (l + r) / 2; :1.L}4"gg
if (l == r) shy-Gu&
return; urs,34h
if ((mid - l) >= THRESHOLD) F4-$~v@
mergeSort(data, temp, l, mid); Mlg0WrJ|2
else D(@S+r_ota
insertSort(data, l, mid - l + 1); 2+N]PW\V
if ((r - mid) > THRESHOLD) j?3wvw6T
mergeSort(data, temp, mid + 1, r); T"}5}6rSG
else XSwl Tg
insertSort(data, mid + 1, r - mid); g#pr yYz
O-0x8O^B
for (i = l; i <= mid; i++) { ?DS@e@lx
temp = data; fM :]&
} T?CdZc.
for (j = 1; j <= r - mid; j++) { F`9xVnK=
temp[r - j + 1] = data[j + mid]; lBLARz&c#
} 'A=^Se`=
int a = temp[l]; t:x\kp
int b = temp[r]; b;B%q$sntC
for (i = l, j = r, k = l; k <= r; k++) { A7Cm5>Y_S
if (a < b) { kYP#SH/
data[k] = temp[i++]; CAig]=2'
a = temp; :S{BbQ){]
} else { \j}ZB<.>
data[k] = temp[j--]; K^)Eb(4
b = temp[j]; "+R+6<"
} PfAgM1
} 7FP*oN?
} $D~0~gn~
6m/r+?'
/** U/66L+1
* @param data [x=s(:qy
* @param l :(U,x<>
* @param i Fo (fWvz
*/ hlvK5Z
private void insertSort(int[] data, int start, int len) { Jc&{`s^Nu
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Fj8z
} P-9)38`5
} kr^P6}'
} z>1Pz(
} lne4-(DJ
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堆排序： *2>&"B09`
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package org.rut.util.algorithm.support; D#9m\o_
?um;s-x)
import org.rut.util.algorithm.SortUtil; ]!W=^!
ihhDOmUto
/** U|H=Y"pL
* @author treeroot niMsQ
* @since 2006-2-2 /e5O"@
* @version 1.0 :[.vM
*/ IEL%!RFG
public class HeapSort implements SortUtil.Sort{ 6fE7W>la
Di,^%
/* (non-Javadoc) P8OaoPj
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) M~Tuj1?
*/ f <Zxz9
public void sort(int[] data) { PV.Xz0@R
MaxHeap h=new MaxHeap(); H*?t^
h.init(data); Ea=8}6`s
for(int i=0;i h.remove(); D=A&+6B@-
System.arraycopy(h.queue,1,data,0,data.length); XAD- 'i
} wyH[x!QX
9R!atPz9
private static class MaxHeap{ 1fp?
VD;01"#'
void init(int[] data){ `f,/`''R
this.queue=new int[data.length+1]; *nT<m\C6
for(int i=0;i queue[++size]=data; gmUz9P(
fixUp(size); P1.[
} f=l rg KE
} nmee 'oEw
o"s)eh
private int size=0; W<h)HhyG
k&M;,e3v6
private int[] queue; `z}?"BW|
yt+L0wzzB
public int get() { (fH#I tf
return queue[1]; [~+wk9P
} )NW)R*m~D
c8 )DuJ#U
public void remove() { +)AG*
SortUtil.swap(queue,1,size--); aL\PGdgO
fixDown(1); L8@f-Kk
} c`)\Pb/O
file://fixdown etQCzYIhn
private void fixDown(int k) { udK%>
int j; w0 M>[ 4
while ((j = k << 1) <= size) { dM.f]-g
if (j < size %26amp;%26amp; queue[j] j++; pHGYQ;:L
if (queue[k]>queue[j]) file://不用交换 C$=%!wf
break; ~f2z]JLr:
SortUtil.swap(queue,j,k); x`eo"5.$
k = j; 1 &jc/*Z"
} M/B_#yK
} J'6PmPzY|
private void fixUp(int k) { Xz6<lLb
while (k > 1) { df8k7D;~e
int j = k >> 1; j<m(PHSe
if (queue[j]>queue[k]) 3GYw+%Z]
break; etDk35!h~,
SortUtil.swap(queue,j,k); +%z>H"J.
k = j; Hzm:xg
} @,j*wnR
} 5X:AbF
6D;Sgc5"
} G6Axs1a
fivw~z|[@
} zy?|ODM
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SortUtil： [C 7^r3w
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package org.rut.util.algorithm; ]"As1"
y-pJF{ R
import org.rut.util.algorithm.support.BubbleSort; n: ^ d|@
import org.rut.util.algorithm.support.HeapSort; $?iLLA~
import org.rut.util.algorithm.support.ImprovedMergeSort; gT{Q#C2Baw
import org.rut.util.algorithm.support.ImprovedQuickSort; x M/+L:_<
import org.rut.util.algorithm.support.InsertSort; Ys9[5@7
import org.rut.util.algorithm.support.MergeSort; caR<Kb:;*
import org.rut.util.algorithm.support.QuickSort; ,$L4dF3
import org.rut.util.algorithm.support.SelectionSort; IxN9&xa
import org.rut.util.algorithm.support.ShellSort; ='r!g
f1RWP@iar
/** ;vR4XHl|
* @author treeroot 5J.bD)yrP
* @since 2006-2-2 #6aW9GO
* @version 1.0 ?/E~/;+7=
*/ +zN-!5x
public class SortUtil { m,_Z6=I:
public final static int INSERT = 1; |*eZD-f
public final static int BUBBLE = 2; 8P\G}
public final static int SELECTION = 3; 9 RgVK{F
public final static int SHELL = 4; 6dr%;Wp
public final static int QUICK = 5; PcMD])Z{G
public final static int IMPROVED_QUICK = 6; y3Qsv
public final static int MERGE = 7; ha<[bue
public final static int IMPROVED_MERGE = 8; 1Faf$J~7|
public final static int HEAP = 9; e;q!6%
J7$5s
public static void sort(int[] data) { ,5p(T_V/
sort(data, IMPROVED_QUICK); |Pax=oJ\M
} %)8}X>xq
private static String[] name={ ./Zk`-OBT
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Lnl(2xD
}; :K,i\
T@B/xAq5!
private static Sort[] impl=new Sort[]{ /N10
new InsertSort(), x_Y!5yg E
new BubbleSort(), H [\o RId
new SelectionSort(), oG?Xk%7&\
new ShellSort(), _Kf%\xg
new QuickSort(), 3AtGy'NTp
new ImprovedQuickSort(), r.&Vw|*>
new MergeSort(), [#vH'y
new ImprovedMergeSort(), hpX9[3
new HeapSort() ZgcMv,=
}; R$<&ie6UQ
',@3>T**
public static String toString(int algorithm){ OU_gdp
return name[algorithm-1]; M#6W(|V/
} 7hcYD!DS
kd(8I_i@
public static void sort(int[] data, int algorithm) { O"9\5(w
impl[algorithm-1].sort(data); 20h, ^
} .f2bNnB~pP
g}{aZ$sta
public static interface Sort { RWZSQ~
public void sort(int[] data); xwq (N_
} >uB#&Q
]y'>=a|T
public static void swap(int[] data, int i, int j) { ^A/k)x6
int temp = data; `p-cSxR_
data = data[j]; %)W2H^
data[j] = temp; &)ChQZA
} 19)i*\+
} hd<c&7|G'