[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; ao1(]64X"
} 8*#R]9
int i1=l; 1PQ~jfGi
int i2=mid+1; ;=eDO(Ij
for(int cur=l;cur<=r;cur++){ 7Bzq,2s
if(i1==mid+1) RKHyw08
data[cur]=temp[i2++]; Ai=se2
else if(i2>r) cl[BF'.H
data[cur]=temp[i1++]; &:9cAIe]H
else if(temp[i1] data[cur]=temp[i1++]; O`x;,6Vr
else /YW>*?"N
data[cur]=temp[i2++]; ZM!CaR
} }Z@ovsG
} y&q*maa[
=n5zM._S-
} , pDnRRJ!
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改进后的归并排序: 0%&1\rm+j
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package org.rut.util.algorithm.support; tZ:_ag)o
0=@?ob7
import org.rut.util.algorithm.SortUtil; m4hX 'F
Q('r<v96
/** A-Sv;/yD_
* @author treeroot !;&p"E|b#
* @since 2006-2-2 &gVN&
* @version 1.0 'y;EhOwj,
*/ BZ94NOOdw
public class ImprovedMergeSort implements SortUtil.Sort { :~b3^xhc^
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private static final int THRESHOLD = 10; jSD#X3qp
B:b5UD
/* eJF5n#
* (non-Javadoc) hm84Aq= f
* KyVQh8
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) yzbx .
*/ Fsmycr!R
public void sort(int[] data) { "cE7 5
int[] temp=new int[data.length]; x[wq]q#*
mergeSort(data,temp,0,data.length-1); SN9kFFIPb=
} 4x{0iav
N=4G=0 `ke
private void mergeSort(int[] data, int[] temp, int l, int r) { y6ECdVF
int i, j, k; A;;fACF8e
int mid = (l + r) / 2; F3N?Nk/
if (l == r) *rM^;4Zt
return; ;kFDMuuO
if ((mid - l) >= THRESHOLD) 6LOnU~l,
mergeSort(data, temp, l, mid); Buf/@B7+\
else hEA<o67
insertSort(data, l, mid - l + 1); j#X.KM
if ((r - mid) > THRESHOLD) o1-m1<ft
mergeSort(data, temp, mid + 1, r); \s/s7y6b+
else #zG&|<hc
insertSort(data, mid + 1, r - mid); `n#H5Oyn
<Y*+|T+&d
for (i = l; i <= mid; i++) { 8>trS=;n
temp = data; ]9YJ,d@J
} o9|nJ;
for (j = 1; j <= r - mid; j++) { NaPt"G
temp[r - j + 1] = data[j + mid]; M`. tf_x
} sNj)ZWgd>
int a = temp[l]; Uddr~2%(
int b = temp[r]; J}htu
for (i = l, j = r, k = l; k <= r; k++) { Hc! mB
if (a < b) { ?^H `M|S
data[k] = temp[i++]; d:ARf
a = temp; ))R5(R
} else { I(]}XZq
data[k] = temp[j--]; Q;[,Q~c[u
b = temp[j]; !Z`j2 e}
} E.r>7`E
} )LdP5z-
} w:%o?pKet1
u5O+1sZ"6
/** 6 )Hwt_b
* @param data qS403+Su1=
* @param l '= _/1F*q
* @param i = 6tHsN23
*/ )`SES."
private void insertSort(int[] data, int start, int len) { Qt iDTr
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); E%+Dl=
} RS"H8P4W
} ks3`3q 7
} LUG;(Fko
} V_C-P[2~
vqnw#U4`
堆排序： ~Fe${2
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package org.rut.util.algorithm.support; ?Y)vGlWDW<
03xa'Of>
import org.rut.util.algorithm.SortUtil; :l~ I
l]@&D#3ZM
/** kQ4dwF~
* @author treeroot r>dwDBE
* @since 2006-2-2 IYqBQnX}oM
* @version 1.0 Tu@8}C
*/ * 1T&
public class HeapSort implements SortUtil.Sort{ {n(b{ibl
4oK?-|=?
/* (non-Javadoc) Wc,_RN-
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) /+8JCp
*/ ~1cnE:x;V
public void sort(int[] data) { `D>S;[~S7
MaxHeap h=new MaxHeap(); 1)9sf0LyU
h.init(data); y]2qd35u_A
for(int i=0;i h.remove(); Cnnh7`
System.arraycopy(h.queue,1,data,0,data.length); @'YS1N<
} 8 ![|F:
@WJgWJm
private static class MaxHeap{ xHoKo
7bqBk,`9
void init(int[] data){ if}-_E<F
this.queue=new int[data.length+1]; x6(~;J
for(int i=0;i queue[++size]=data; lFa02p0
fixUp(size); =2Bg9!zW>
} :Nu^
} wyp|qIS;
Z&ZP"P4
private int size=0; S7=Bd[4
"vXxv'0\f
private int[] queue; -9"['-WH,
`n$I]_}/%
public int get() { F_Z- 8>P
return queue[1]; /[O(ea$U
} %TX@I$Ba
J%x6
public void remove() { W)9K`hM6
SortUtil.swap(queue,1,size--); UQ'\7OS
fixDown(1); O_$m!5ug
} 7#@cz5Su
file://fixdown W.z;B<
private void fixDown(int k) { 9l}FU$
int j; TftHwe):V
while ((j = k << 1) <= size) { HU%o6cw
if (j < size %26amp;%26amp; queue[j] j++; W- i&sUgy
if (queue[k]>queue[j]) file://不用交换 kHXL8k#T
break; hZh9uI7.
SortUtil.swap(queue,j,k); GN-mrQo
k = j; v[#9+6P=
} XpmS{nb
} CF+_/s#j^
private void fixUp(int k) { io,M{Ib
while (k > 1) { CK:y?
int j = k >> 1; ObLly%|i
if (queue[j]>queue[k]) .jS~By|r
break; an4GSL
SortUtil.swap(queue,j,k); 1&^MfP}
k = j; /J04^6
} [QMu2
} I?"q/Ub~h
:>D[n1v
} Vnx,5E&
&07]LF$]
} D|rFu
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SortUtil： ~n[xtWO0
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package org.rut.util.algorithm; 2kdC]|H2?
M&NB/
import org.rut.util.algorithm.support.BubbleSort; IB# @yH
import org.rut.util.algorithm.support.HeapSort; vz^<YZMu
import org.rut.util.algorithm.support.ImprovedMergeSort; x%+aKZ(m)
import org.rut.util.algorithm.support.ImprovedQuickSort; o4*+T8[|5
import org.rut.util.algorithm.support.InsertSort; }b=}uiR#
import org.rut.util.algorithm.support.MergeSort; "*LD 3
import org.rut.util.algorithm.support.QuickSort; tjGd )
import org.rut.util.algorithm.support.SelectionSort; mjWU0Gh%*
import org.rut.util.algorithm.support.ShellSort; X5X?&* %{
FDVcow*]n
/** H2 $GIY
* @author treeroot 3l3+A+n
* @since 2006-2-2 `}BF${vF
* @version 1.0 e*bH0';q
*/ z;A>9vQ_J
public class SortUtil { slg ]#Dy
public final static int INSERT = 1; F1jglH/MF)
public final static int BUBBLE = 2; ;QW3CEaUq
public final static int SELECTION = 3; /e]'u&a
public final static int SHELL = 4; Gm9hYhC8
public final static int QUICK = 5; " R-!(9k^`
public final static int IMPROVED_QUICK = 6; ^ <Pq,u%k
public final static int MERGE = 7; fv`O4
public final static int IMPROVED_MERGE = 8; P(XaTU&-
public final static int HEAP = 9; 6oLwfTy
?t+5s]
public static void sort(int[] data) { p/U+0f
sort(data, IMPROVED_QUICK); yU8{i&w4
} oS7(s
private static String[] name={ >.'<J]
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" tID%}Zv
}; *+uHQgn(
/9zE^YcT
private static Sort[] impl=new Sort[]{ ep=qf/vd<
new InsertSort(), C4hx@abA
new BubbleSort(), 94 e): jS
new SelectionSort(), QHWBAGA
new ShellSort(), UTf9S>HS
new QuickSort(), 3,]gEE3
new ImprovedQuickSort(), /[6j)HIS
new MergeSort(), 7ULqo>j
new ImprovedMergeSort(), 05snuNt]-
new HeapSort() txcf=)@>V
}; /F4pb]U!*
] )F7)
public static String toString(int algorithm){ B*~5)}1op
return name[algorithm-1]; FL8g5I
} F29va
AgRjr"hF*e
public static void sort(int[] data, int algorithm) { ^)?d6nI
impl[algorithm-1].sort(data); j:,NE(DF
} Pl<;[cB
@FC"nM
public static interface Sort { wWSdTLX
public void sort(int[] data); !A>z(eIsv`
} 'Fs)Rx}\0
l#lF +Q;
public static void swap(int[] data, int i, int j) { zOV=9"~{
int temp = data; N gLU$/y;
data = data[j]; \~BDm
data[j] = temp; N?5x9duK
} kl"+YF5/
} Up:<=Kgci