[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; )y/DGSd
} PVD ~W)0m*
int i1=l; ?%xhe
int i2=mid+1; sE%<"h\_0
for(int cur=l;cur<=r;cur++){ }L$Xb2^l
if(i1==mid+1) 0fPHh>u
data[cur]=temp[i2++]; ,8=`*
else if(i2>r) yw*mA1v
data[cur]=temp[i1++]; &<w[4z\
else if(temp[i1] data[cur]=temp[i1++]; _L4<^Etfm
else 4%!{?[$
data[cur]=temp[i2++]; Y!= k
} &J^4Y!gt
} ^/DII`A
{NY~JFM
} $D/bU lFx
TI[UX16Tz1
改进后的归并排序: 7moElh v
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package org.rut.util.algorithm.support; 6_%]\37_Z
si^4<$Nr%j
import org.rut.util.algorithm.SortUtil; Z`oaaO
Od!F: <
/** eN]>l
* @author treeroot ?bt`fzX{l
* @since 2006-2-2 5rfH;`
* @version 1.0 j FPU zB"
*/ 4P4 Fo1
public class ImprovedMergeSort implements SortUtil.Sort { Zc%foK{
ckf<N9
private static final int THRESHOLD = 10; RrO0uadmn
5i4V5N>3
/* 77xq/c[)
* (non-Javadoc) p]h*6nH>~
* `*" H/QG
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) (zs4#ja2,
*/ 0eqi1;$b]
public void sort(int[] data) { pM&]&Nk
int[] temp=new int[data.length]; t/d',Khg
mergeSort(data,temp,0,data.length-1); |k`f/*
} Z&dr0w8
0i5y(m&7
private void mergeSort(int[] data, int[] temp, int l, int r) { bB:r]*_ s]
int i, j, k; fou_/Nrue
int mid = (l + r) / 2; SE;Tujwhqi
if (l == r) =sE2}/g
return; #*Yi4Cn<
if ((mid - l) >= THRESHOLD) Y^f94s:2S
mergeSort(data, temp, l, mid); hgweNRTh!
else .# 6n
insertSort(data, l, mid - l + 1); JO2ZS6k[
if ((r - mid) > THRESHOLD) cPq Dsl3
mergeSort(data, temp, mid + 1, r); X-)RU?
else fO^e+Mz
insertSort(data, mid + 1, r - mid); cBLR#Yu;O5
AXl!cgi
for (i = l; i <= mid; i++) { j{{~ZM
temp = data; t['k%c
} ^)f{q)to
for (j = 1; j <= r - mid; j++) { ;-KAUgL2
temp[r - j + 1] = data[j + mid]; >d8x<|D
} b^[W_y
int a = temp[l]; *L%6qxl`V
int b = temp[r]; )-+\M_JK5
for (i = l, j = r, k = l; k <= r; k++) { x">W u2
if (a < b) { m]FaEQVoE
data[k] = temp[i++]; .KLm39j(
a = temp; nT.L}1@
} else { aO.\Qe+j
data[k] = temp[j--]; $J QWfGwR
b = temp[j]; Q_&}^
} &1z)fD2
} $!YKZ0)B'0
} 0'?V|V=v
vKNt$]pm=
/** q2x|%HRF
* @param data .i{>Z
* @param l AbUDn\0$
* @param i )7&42>t
*/ {&2$[g=[ ^
private void insertSort(int[] data, int start, int len) { uY^v"cw/F
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); _:35d1[
} B{7Kzwh;
} 1.# |QX
} "?apgx 6
} j5L)N
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堆排序： tg.|$n
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package org.rut.util.algorithm.support; <eB<^ &nd
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import org.rut.util.algorithm.SortUtil; 4$yV%[j
TZ?Os4+
/** qqnclqkw&
* @author treeroot hi!L\yi
* @since 2006-2-2 m7$8k@r
* @version 1.0 A2m_q>> !
*/ ^"3\iA:
public class HeapSort implements SortUtil.Sort{ .z=U= _e
weNzYMf%
/* (non-Javadoc) s%eyW _
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 0B=[80K;8
*/ aSc{Ft/O
public void sort(int[] data) { 6!P`XTTE
MaxHeap h=new MaxHeap(); yiiyqL*E
h.init(data); T}C2e! _O
for(int i=0;i h.remove(); 7#QLtU
System.arraycopy(h.queue,1,data,0,data.length); OnZF6yfN=3
} b,nn&B5@{
OE_QInb<
private static class MaxHeap{ q`XW5VV{K
7FAIew\r
void init(int[] data){ lB1#
this.queue=new int[data.length+1]; 24#bMt#^
for(int i=0;i queue[++size]=data; !Citzor
fixUp(size); Ls&+XlrX8
} JkZ50L
} 25UYOK}!
M'kVL0p?vN
private int size=0; rkkU"l$v
led))qd@V-
private int[] queue; z"tjDP
6yY.!HRkr
public int get() { ~@{w\%(AK]
return queue[1]; >DHp*$y
} dXmV@ Noo
]1m"V;vZ
public void remove() { ).LTts7c
SortUtil.swap(queue,1,size--); fX_#S|DlSG
fixDown(1); !)N|J$FU
} wMGk!N
file://fixdown O7%2v@j|8
private void fixDown(int k) { >*IN
int j; rah,dVE]
while ((j = k << 1) <= size) { }.p<wCPy6
if (j < size %26amp;%26amp; queue[j] j++; + :Vrip
if (queue[k]>queue[j]) file://不用交换 >1A*MP4
break; OA[&Za#w
SortUtil.swap(queue,j,k); P}0*{%jB
k = j; F*M|<E=
} moMYdArj
} >&OUGu|
private void fixUp(int k) { #/|75 4]]
while (k > 1) { zrs<#8!Y_!
int j = k >> 1; d{f@K71*
if (queue[j]>queue[k]) 9qKzS<"h
break; [QT1Ju64
SortUtil.swap(queue,j,k); Wt^|BjbB4
k = j; -_NC%iN#C
} 98fu>>*G{
} l[ne/O JJ
Ir5WN_EaS
} %JtbRs(~q
mLwoi!]m
} Z?oG*G:
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SortUtil： QYQtMb,
in<}fAro6
package org.rut.util.algorithm; yPV'pT)
P-CB;\
import org.rut.util.algorithm.support.BubbleSort; . V$ps-t
import org.rut.util.algorithm.support.HeapSort; ~]BMrgn
import org.rut.util.algorithm.support.ImprovedMergeSort; %K(0W8&
import org.rut.util.algorithm.support.ImprovedQuickSort; XF}rd.K:
import org.rut.util.algorithm.support.InsertSort; [$\z'}
import org.rut.util.algorithm.support.MergeSort; lv]quloT
import org.rut.util.algorithm.support.QuickSort; (DDyK[t+VX
import org.rut.util.algorithm.support.SelectionSort; MxOD8TDF4
import org.rut.util.algorithm.support.ShellSort; ,`32!i
eWvo,4
/** HRB[GP+
* @author treeroot QK; T~ _k
* @since 2006-2-2 EVt?C+
* @version 1.0 09S6#;N&
*/ g%xGOA
public class SortUtil { <*|?x86~
public final static int INSERT = 1; [BM*oEFPB*
public final static int BUBBLE = 2; iWE)<h
public final static int SELECTION = 3; ~9=aT1S|
public final static int SHELL = 4; w8iR|TV
public final static int QUICK = 5; ]XeO0Y
public final static int IMPROVED_QUICK = 6; C5W>W4EM
public final static int MERGE = 7; b.F^vv"]]
public final static int IMPROVED_MERGE = 8; :?Y$bX}a
public final static int HEAP = 9; 5\Fz!
{_#yz\j
public static void sort(int[] data) { hXn3,3f3oZ
sort(data, IMPROVED_QUICK); YE}s
} 4=Gph
private static String[] name={ uS+k^ #
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" J:j<"uPm
}; T[?6[,.
PUdM[-zjh
private static Sort[] impl=new Sort[]{ M2@b1;
new InsertSort(), W`z 0"
new BubbleSort(), :q#K} /
new SelectionSort(), Y[Ltrk{
new ShellSort(), UsQ4~e 4-
new QuickSort(), BVw Wj-,
new ImprovedQuickSort(), (k`{*!:1a
new MergeSort(), FP^{=0
new ImprovedMergeSort(), R?66b{O
new HeapSort() DJ@|QQ
}; wmU0E/{9]
!@A#=(4R4
public static String toString(int algorithm){ 7=XL!:P
return name[algorithm-1]; %7hB&[ 5
} J*fBZ.NO
<#+44>h
public static void sort(int[] data, int algorithm) { &<pKx!
impl[algorithm-1].sort(data); aj\nrD1
} =~KsS}`1,
!yOeW0/2[
public static interface Sort { SC &~s$P;
public void sort(int[] data); jJZgK$5+
} C'A]i5
1"#*)MF
public static void swap(int[] data, int i, int j) { %\$;(#h
int temp = data; B>y9fI
data = data[j]; jZoNi
data[j] = temp; }/P5>F<H[
} B;K`q
} !T,AdNa8