[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; FDuA5At
} ][Tw^r&
int i1=l; O2Y|<m
int i2=mid+1; oVk!C a
for(int cur=l;cur<=r;cur++){ Yf[Cmn
if(i1==mid+1) $G0e1)D
data[cur]=temp[i2++]; %9zpPrWF
else if(i2>r) DmgDhNXKq
data[cur]=temp[i1++]; lv]U)p
else if(temp[i1] data[cur]=temp[i1++]; .=}\yYGe
else {@Lun6\
data[cur]=temp[i2++]; +~F>:v?Rh
} Q3+%8zZI
} zhow\l2t}
CaCApL
} `Qb!W45
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改进后的归并排序: ;/Y#ph[
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package org.rut.util.algorithm.support; T@vE@D
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import org.rut.util.algorithm.SortUtil; R7:u 8-dU1
~,s'-
/** _0naqa!JyH
* @author treeroot )<J #RgE
* @since 2006-2-2 3?aM\z;
* @version 1.0 'Sd+CXS
*/ }duqX R
public class ImprovedMergeSort implements SortUtil.Sort { arKf9`9
M3KK^YRN
private static final int THRESHOLD = 10; -+qg
BuM#&]s
/* 0*P-/)o x
* (non-Javadoc) gmTBp}3
* ]c_lNHssmq
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ~,F]~|U7l
*/ C-49u<;,
public void sort(int[] data) { #r>)A
int[] temp=new int[data.length]; 2PPb
mergeSort(data,temp,0,data.length-1); C4X3;l Z%S
} +{6:]
e"EGqn&!
private void mergeSort(int[] data, int[] temp, int l, int r) { 'Eia=@
int i, j, k; DfkGNBY
int mid = (l + r) / 2; @CR<&^s5V
if (l == r) #l)o<Z
return; Pj56,qd>s
if ((mid - l) >= THRESHOLD) - ]We|{
mergeSort(data, temp, l, mid); }n^}%GB
else _,F\%}
insertSort(data, l, mid - l + 1); MftaT5
if ((r - mid) > THRESHOLD) ZrP 8/>
mergeSort(data, temp, mid + 1, r); -=:tlH n
else =dKk #*
insertSort(data, mid + 1, r - mid); Y/mfBkh
U\{I09@E 0
for (i = l; i <= mid; i++) { [4;_8-[Nv
temp = data; B2BG*xa
} *.$ov<E.
for (j = 1; j <= r - mid; j++) { &j'k9C2p
temp[r - j + 1] = data[j + mid]; kMzDmgoxNg
} * kL>9
int a = temp[l]; ):+^893)
int b = temp[r]; k|]l2zlT
for (i = l, j = r, k = l; k <= r; k++) { "j&p3
if (a < b) { Ub\&k[F
data[k] = temp[i++]; +=L+35M
a = temp; 9*"K+t:
} else { fe6Op
data[k] = temp[j--]; D@{m
b = temp[j]; d`?EEO
} $WE_aNfja
} %0815 5M
} <T'fJcR
GXv2B%i8
/** h52+f
* @param data Pa; *%7
* @param l Cx) N;x
* @param i h4slQq~K
*/ )=N.z6?
private void insertSort(int[] data, int start, int len) { h_Er$ZT64
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); >9g^-~X;v
} E/% F0\B
} I2z7}*<u
} Br$/hn=
} '/ueY#eG
+~ S7]AZ
堆排序： |CS&H2!s
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package org.rut.util.algorithm.support; ]YDqmIW
"tK3h3/Xv
import org.rut.util.algorithm.SortUtil; La^Zr,T!
}ZwnG=7T?
/** {qry2ZT5
* @author treeroot eEmLl(Lb
* @since 2006-2-2 -42 U
* @version 1.0 lvk*Db$
*/ 4uVyf^f\]f
public class HeapSort implements SortUtil.Sort{ -x/g+T-
<PO-S\N
/* (non-Javadoc) 1-!|_<EW1
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) iIo>]\Pw
*/ ybB<AkYc
public void sort(int[] data) { ;ov}%t>UD
MaxHeap h=new MaxHeap(); pAEJ=Te
h.init(data); ~3Z(0gujD
for(int i=0;i h.remove(); Xn<|6u
System.arraycopy(h.queue,1,data,0,data.length); D{t0OvQag
} h!hv{c
PO2]x:
private static class MaxHeap{ r7)iNTQ1
E?mW4?
void init(int[] data){ .e:+Ek+
this.queue=new int[data.length+1]; NXE1v~9V
for(int i=0;i queue[++size]=data; "yXqf%CGE
fixUp(size); Qbj:^{`>(
} P6tJo{l8w
} I|mxyyf
k"FY &;G(G
private int size=0; Lr>4~1:`
{ lZ<'p
private int[] queue; 1T3YFt@&I
XoiZ"zE
public int get() { nm,Tng oj
return queue[1]; m)<N:|
} & *&
69C ss'
public void remove() { qkyYt#4E
SortUtil.swap(queue,1,size--); u-dF~.x
fixDown(1); E~Y%x/oX
} {O[ !*+O
file://fixdown Q[Tbdc%1EG
private void fixDown(int k) { Nk>6:Ho{G
int j; ZOzyf/?.
while ((j = k << 1) <= size) { rmnnV[@o
if (j < size %26amp;%26amp; queue[j] j++; jRdW=/q+(
if (queue[k]>queue[j]) file://不用交换 U09@pne8
break; RKz _GEH)
SortUtil.swap(queue,j,k); y|D-W>0cX3
k = j; `VOLw*Ci
} DZ;2aH
} (WS<6j[q
private void fixUp(int k) { SYK?5_804
while (k > 1) { (pQ$<c
int j = k >> 1; ^m^,:]I0P
if (queue[j]>queue[k]) a% 82I::t
break; &sPu3.p
SortUtil.swap(queue,j,k); Hkj| e6
k = j; O`(it%Ho!
} f]^ @z<FC
} {S5D~A*a+
>z8y L+
} }(if|skau
E{|n\|
} +Sdki::
$U5$*R@jo[
SortUtil： X1h*.reFAL
v{>9&o.J
package org.rut.util.algorithm; TsZX'Yn
E@;v|Xc
import org.rut.util.algorithm.support.BubbleSort; 1^=[k
import org.rut.util.algorithm.support.HeapSort; 4=n%<U`Z/
import org.rut.util.algorithm.support.ImprovedMergeSort; 27jZ~Bp$
import org.rut.util.algorithm.support.ImprovedQuickSort; PYYO-Twg
import org.rut.util.algorithm.support.InsertSort; _:;j)J0
import org.rut.util.algorithm.support.MergeSort; d`Em)3v
import org.rut.util.algorithm.support.QuickSort; b(gcnSzM2
import org.rut.util.algorithm.support.SelectionSort; m-!z(vcn
import org.rut.util.algorithm.support.ShellSort; \A3yM{G~+
8uhB&qxB
/** WN?meZ/N/
* @author treeroot i(>v~T,(
* @since 2006-2-2 Z$a4@W9o
* @version 1.0 z15QFVm
*/ O0<GFL$)&
public class SortUtil { QJ-?67_i
public final static int INSERT = 1; !J@pox-t
public final static int BUBBLE = 2; `<l|XPv
public final static int SELECTION = 3; ,TxZ:f`"
public final static int SHELL = 4; uv dx>5]
public final static int QUICK = 5; A&fh0E (t
public final static int IMPROVED_QUICK = 6; y0XI?Wr
public final static int MERGE = 7; } "ts
public final static int IMPROVED_MERGE = 8; 1&}^{ Ys
public final static int HEAP = 9; V5ihplAk
OKq={l
public static void sort(int[] data) { Y_Lsmq2!
sort(data, IMPROVED_QUICK); 7QkAr
} ,s1n!@9
private static String[] name={ :`P;(h
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ?`O Dt]s
}; *Cgd?*\7
*:A)j?(
private static Sort[] impl=new Sort[]{ #[#dc]D
new InsertSort(), 4==LtEp
new BubbleSort(), Jid:$T>
new SelectionSort(), 5{|\h}
new ShellSort(), $pGk%8l%
new QuickSort(), wen6"
new ImprovedQuickSort(), {n%U2LVL
new MergeSort(), $yb8..+
new ImprovedMergeSort(), JZ=a3)x"
new HeapSort() H{T)?J~
}; dfq5P!'
YR`Mi.,Sfm
public static String toString(int algorithm){ \ o&i63u
return name[algorithm-1]; !kfnqe?|
} [}_ar
7e"(]NC84
public static void sort(int[] data, int algorithm) { uNY]%[AnJ
impl[algorithm-1].sort(data); ]H[FZY
} r4qFEFV3%
yMa5?]J
public static interface Sort { 3?uP$(l
public void sort(int[] data); , 0rC_)&B
} :+,qvu!M7
%tzz3Y
public static void swap(int[] data, int i, int j) { m,TqyP#
int temp = data; t(MlZ>H
data = data[j]; 0,;FiOp
data[j] = temp; #Y*AGxk
} F'#e]/V1
} ;mb 6i_