[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; ]Wv\$JXI
} n2Ycq&O
int i1=l; o&LNtl;
int i2=mid+1; 94|BSxc
for(int cur=l;cur<=r;cur++){ =UNzjmP503
if(i1==mid+1) l= !KZaH
data[cur]=temp[i2++]; w>VM--
else if(i2>r) eVbHPu4
data[cur]=temp[i1++]; |n67!1
else if(temp[i1] data[cur]=temp[i1++]; %t%+;(M9
else "PJ@Q9n__
data[cur]=temp[i2++]; 31YzTbl[H
} kfA%%A
} ,1F3";`n[
M*+_E8Lh
} -jFt4Q7}8
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改进后的归并排序: "o}3i!2Qr
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package org.rut.util.algorithm.support; P",~8Aci(
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import org.rut.util.algorithm.SortUtil; `;4zIBJ
H-0A&oG
/** M_UhFY='
* @author treeroot sRb)*p'
* @since 2006-2-2 H`aqpa"C
* @version 1.0 MBDu0 [c
*/ kUn55 l
public class ImprovedMergeSort implements SortUtil.Sort { #$X_,P|D
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private static final int THRESHOLD = 10; Uq0RJ<n
86@"BNnTh
/* SgFyv<6>:
* (non-Javadoc) XrtB&h|C
* gn#4az3@e>
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) KS1Z&~4
*/ "F}anPY
public void sort(int[] data) { KDwjck"5;
int[] temp=new int[data.length]; L&Bc-kMH
mergeSort(data,temp,0,data.length-1); "+r8izB
} ft4J.oT
.z7F58
private void mergeSort(int[] data, int[] temp, int l, int r) { 4U~[8U}g
int i, j, k; 6}n>Nb;L"
int mid = (l + r) / 2; Qp!r_a&
if (l == r) Pc`d@q
return; C8DZ:3E$c
if ((mid - l) >= THRESHOLD) w,;CrW T2t
mergeSort(data, temp, l, mid); b qEwi[`
else rH$0h2
insertSort(data, l, mid - l + 1); e ,k,L
if ((r - mid) > THRESHOLD) ZVR0Kzu?Ra
mergeSort(data, temp, mid + 1, r); S3`zB?7,
else ke2'?,f
insertSort(data, mid + 1, r - mid); {1>V~e8t
?o"wyF A*
for (i = l; i <= mid; i++) { =Qp~@k=2
temp = data; wz$1^ml
} J,_I$* _0
for (j = 1; j <= r - mid; j++) { wH3FCfvm
temp[r - j + 1] = data[j + mid]; }aRV)F
} 8AOJ'~$
int a = temp[l]; Nf%jLK~
int b = temp[r]; ABSAle
for (i = l, j = r, k = l; k <= r; k++) { cx&jnF#$
if (a < b) { [58xT>5`m
data[k] = temp[i++]; N9r02c
a = temp; Uz>5!_
} else { /KO!s,Nk
data[k] = temp[j--]; ~2beVQ(U
b = temp[j]; !r,ZyJU
} :\NqGS=<
} !O-q13\Y
} xYtY}?!"
Y [0S
/** &%ej=O
* @param data /x"gpKwsB
* @param l \5BI!<
* @param i x#|=.T
*/ R|Z$aHQ
private void insertSort(int[] data, int start, int len) { ? }|;ai
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); :+|b7fF
} :@I?JSi
} {:$0j|zL1
} ..X efNbl
} ~Us1F=i_Q
v(3nBZHv_!
堆排序： yK+76\} I
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package org.rut.util.algorithm.support; 4NMv7[r
1M7=*w,
import org.rut.util.algorithm.SortUtil; %np b.C|+
y@ J\h8_
/** w;vp X>
* @author treeroot X's-i!
* @since 2006-2-2 :c"J$wT/
* @version 1.0 nchhNU
*/ xG 7;Ps4L
public class HeapSort implements SortUtil.Sort{ YES!?^}
5YUn{qtD
/* (non-Javadoc) #IDDKUE
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) .^N+'g
*/ *,-)4)7d
public void sort(int[] data) { *r!1K!c
MaxHeap h=new MaxHeap(); wh l)^D
h.init(data); j wlmWO6
for(int i=0;i h.remove(); ;TD<\1HJT=
System.arraycopy(h.queue,1,data,0,data.length); >V;JI;[
} XtRfzqg?K
12])``9
private static class MaxHeap{ 1!/cd;{B
;LELC5[*s
void init(int[] data){ yHLclv
this.queue=new int[data.length+1]; >P/kb fPA
for(int i=0;i queue[++size]=data; A0# K@
fixUp(size); WM}:%T-
} '\H{Y[
} 6C9KT;6
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private int size=0; G'q7@d{'
]^Z7w`=%5
private int[] queue; \K9XG/XIx
F IDNhu
public int get() { W}EI gVHs
return queue[1]; [Maon.t!l
} Mii-Q`.:
TD].*9
public void remove() { wxB?}
SortUtil.swap(queue,1,size--); {g@Wd2-J}
fixDown(1); E&}r"rbI
} ?/9]"HFHN
file://fixdown B++.tQ=X.
private void fixDown(int k) { #s{>v$F
int j; &<R8'
while ((j = k << 1) <= size) { 8kXbyKX[b
if (j < size %26amp;%26amp; queue[j] j++; cveTrY}g
if (queue[k]>queue[j]) file://不用交换 ?t$sju(\
break; X?z5IL;rt
SortUtil.swap(queue,j,k); zLc.4k
k = j; 1GN>,Lb:o
} PvBx<i}A
} cEnkt=
private void fixUp(int k) { P5*:r3>
while (k > 1) { }>b4s!k,
int j = k >> 1; !p >a,8w
if (queue[j]>queue[k]) nS"K dPM
break; o<1e-
SortUtil.swap(queue,j,k); #R4Mv(BG
k = j; I:U/%cr,
} xcnHj1r-o'
} (l{+T#
54WM*FZ
} $"0t1
e'[T5HI
} xyj)W
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SortUtil： A@bWlwfl
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package org.rut.util.algorithm; &{9'ylv-B)
LG'JQGl5
import org.rut.util.algorithm.support.BubbleSort; I.r&;
import org.rut.util.algorithm.support.HeapSort; iC?s`c0B
import org.rut.util.algorithm.support.ImprovedMergeSort; P0~3<h?U8
import org.rut.util.algorithm.support.ImprovedQuickSort; DalQ.
import org.rut.util.algorithm.support.InsertSort; yA?>v'K
import org.rut.util.algorithm.support.MergeSort; xr&wV0O'
import org.rut.util.algorithm.support.QuickSort; H/Cv?GJF
import org.rut.util.algorithm.support.SelectionSort; hhlQ!WV2
import org.rut.util.algorithm.support.ShellSort; q -M&f@Il
k^Zpb&`Hx
/** v]F q}I"
* @author treeroot O_K@\<;~
* @since 2006-2-2 {R `IA|T#k
* @version 1.0 /_@S*=T5
*/ nL5Gr:SLo
public class SortUtil { z}.!q{Q
public final static int INSERT = 1; #pBAGm3
public final static int BUBBLE = 2; @g9j+DcU
public final static int SELECTION = 3; 2`+?s
public final static int SHELL = 4; yY_G;Wk
public final static int QUICK = 5; `~UCWK
public final static int IMPROVED_QUICK = 6; g-E!*K
public final static int MERGE = 7; }oYR.UH
public final static int IMPROVED_MERGE = 8; N[^%|
public final static int HEAP = 9; 9Re605xQ6
&JAQ:([:
public static void sort(int[] data) { J_}&Btb)e
sort(data, IMPROVED_QUICK); Xx[ LK
} kuu9'Sqc'b
private static String[] name={ 7loCb4Hv
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" BnvUPDT&
}; VD/Wl2DK
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private static Sort[] impl=new Sort[]{ H.uflO
new InsertSort(), hghtF
new BubbleSort(), B, xrZs
new SelectionSort(), ?u"(^93f
new ShellSort(), 7IBm(#
new QuickSort(), l~Kn-S{
new ImprovedQuickSort(), ]w]Swt2n
new MergeSort(), VXQS~#dQj
new ImprovedMergeSort(), T~s/@*y9
new HeapSort() _bqiS]:
}; Ox?LVRvxI
E87/B%R
public static String toString(int algorithm){ iN*d84KTP
return name[algorithm-1]; ?*u)T%S
} DX}EOxO,.
w4'(Y,(`
public static void sort(int[] data, int algorithm) { MVjc.^
impl[algorithm-1].sort(data); G\Hck=P[$3
} #I%< 1c%XA
`=uCp^+v
public static interface Sort { j:"+/5rV8
public void sort(int[] data); }!0,(<EsV
} nf,>l0,,'
yZHQql%J O
public static void swap(int[] data, int i, int j) { aBr%"&Z.MG
int temp = data; ,Ot3N\%yn
data = data[j]; H`-%)c=
data[j] = temp; BT 98WR"\
} t"2WJ-1k}
} bVtboHlY