[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; E[jXUOu-
} Q(IJD4
int i1=l; R%b*EBZ
int i2=mid+1; /lLov.
for(int cur=l;cur<=r;cur++){ O->_/_
if(i1==mid+1) (ve+,H6w\
data[cur]=temp[i2++]; k-WHHoU>o
else if(i2>r) Qj 6gg
data[cur]=temp[i1++]; cc|CC Zl
else if(temp[i1] data[cur]=temp[i1++]; a[1sA12
else Pqy-gWOv
data[cur]=temp[i2++]; N>d|A]zH
} ,4H;P/xsb
} }rzdm9
xdd:yrC
} ~~C6)N~1
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改进后的归并排序: X0y?<G1(a
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package org.rut.util.algorithm.support; ^uyNv-'F
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import org.rut.util.algorithm.SortUtil; VLcyPM@"Q!
0LWdJ($?
/** j|VXC(6P,
* @author treeroot 81g9ZV(4
* @since 2006-2-2 Ro'jM0(KE
* @version 1.0 gB]C&Q
*/ 6Xdtr
public class ImprovedMergeSort implements SortUtil.Sort { d?:`n9`
C(-[ Y!
private static final int THRESHOLD = 10; aGPqh,<QD
Q0V^PDF
/* 0jR){G9+
* (non-Javadoc) 5ZnSA9?
* Y 3o^Euou
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) $d'CBsu|<
*/ {]&R8?%
public void sort(int[] data) { JAc@S20v\
int[] temp=new int[data.length]; pO"m~mpA
mergeSort(data,temp,0,data.length-1); R{*_1cyW
} p{NPcT%&
)fNGB]%
private void mergeSort(int[] data, int[] temp, int l, int r) { q}>M& *
int i, j, k; L)q`D2|'
int mid = (l + r) / 2; Uh|TDuM
if (l == r) W|;nJs:e
return; C@%iQ]=
if ((mid - l) >= THRESHOLD) jEUx q%BH
mergeSort(data, temp, l, mid); Ns'FH(:
else l<:`~\#
insertSort(data, l, mid - l + 1); z>6.[Z(T
if ((r - mid) > THRESHOLD) c Qld$
mergeSort(data, temp, mid + 1, r); 1'NhjL
else o g_Ri$x8
insertSort(data, mid + 1, r - mid); RNGO~:k?r
P,(9cyS{
for (i = l; i <= mid; i++) { ~\2;i]|
temp = data; ucw`;<d8
} 7g-Dfg.w
for (j = 1; j <= r - mid; j++) { 4Mk8Cpz
temp[r - j + 1] = data[j + mid]; f,|QAj=a
} MzcB3pi
int a = temp[l]; x'@W=P 7
int b = temp[r]; R;WW f.#
for (i = l, j = r, k = l; k <= r; k++) { Q-[3j
if (a < b) { a;%I\w;2
data[k] = temp[i++]; w{3ycR
a = temp; u[)_^kIE(n
} else { W:WQaF`2x
data[k] = temp[j--]; cI5N"U@yN
b = temp[j]; Tj=gRQ2v
} (I[s3EnhS
} > 84e`aGE
} 4bnt=5]
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/** RF:04d
* @param data \UOm]z
* @param l j(sLK &
* @param i W;qP=DK2
*/ 47KNT7C
private void insertSort(int[] data, int start, int len) { 8+ov(B;(
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 22z1g(;@
} DacN{r"3
} >E,Q
} YV-j/U{&
} 1DUb [W8
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堆排序： "rsSW3_
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package org.rut.util.algorithm.support; ^ESUMXb
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import org.rut.util.algorithm.SortUtil; ^_sQG
"v5ElYG
/** m~;B:LN<
* @author treeroot [_V:)
* @since 2006-2-2 B_hPcmB
* @version 1.0 ;`+`#h3-V
*/ 5Dd:r{{ Q
public class HeapSort implements SortUtil.Sort{ "CBRPp
j1A|D
/* (non-Javadoc) `kFiH*5%z
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) p-xd k|'[
*/ 0'`S,
public void sort(int[] data) { 6lsEGe
MaxHeap h=new MaxHeap(); `"c'z;
h.init(data); `;$h'eI9
for(int i=0;i h.remove(); ->h5T%sn
System.arraycopy(h.queue,1,data,0,data.length); [X<Pk
} ;g+]klR!
wN(&5rfS
private static class MaxHeap{ FIS "Z(
6T_K9
void init(int[] data){ 6Cv.5Vhx
this.queue=new int[data.length+1]; !>3LGu,
for(int i=0;i queue[++size]=data; ;}K62LSR
fixUp(size); -%,"iaO
} IXWQ)
} |4fF T `
5]d{6Nc3P
private int size=0; )S*1C@
<: :VCA%
private int[] queue; s1bU
hO3{
public int get() { Wo!;K|~P
return queue[1]; u h)o
} CW p#^1F
1'Rmg\(
public void remove() { n'M>xq_
SortUtil.swap(queue,1,size--); w"~<h;
fixDown(1); \J3/keL
} u%B&WwHG
file://fixdown ;|HL+je;Z
private void fixDown(int k) { Z7z]2v3}c
int j; @PX\{6&
while ((j = k << 1) <= size) { 2"X~ju
if (j < size %26amp;%26amp; queue[j] j++; id?E)Jy
if (queue[k]>queue[j]) file://不用交换 OhFW*v
break; "(f`U.
SortUtil.swap(queue,j,k); oL-2qtv
k = j; RgZOt[!.
} Hhl-E:"H`
} /8c&Axuv
private void fixUp(int k) { ~KPv7WfG
while (k > 1) { 4-^[%&>}
int j = k >> 1; 0[Eb .2I
if (queue[j]>queue[k]) Qnt5HSSt
break; `*_CElpP"
SortUtil.swap(queue,j,k); pRrHuLj^
k = j; Z9[+'ZWt
} <cj{Qk
} Ryv_1gR!
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} I2[]A,f,
'3Q3lM'lh
} R\O.e
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SortUtil： rt}^4IqL
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package org.rut.util.algorithm; i\Wdo/c-H
%\6Q .V#s
import org.rut.util.algorithm.support.BubbleSort; *yez:qnx
import org.rut.util.algorithm.support.HeapSort; !OAvD#
import org.rut.util.algorithm.support.ImprovedMergeSort; %u!b& 5]e
import org.rut.util.algorithm.support.ImprovedQuickSort; !MV@) (.
import org.rut.util.algorithm.support.InsertSort; W5 ec
import org.rut.util.algorithm.support.MergeSort; #|f~s
import org.rut.util.algorithm.support.QuickSort; i=rH7k
import org.rut.util.algorithm.support.SelectionSort; .<YcSG
import org.rut.util.algorithm.support.ShellSort; 8@eOTzm
L'E^c,-x~
/** fYX<d%?7
* @author treeroot eV2mMSY
* @since 2006-2-2 =w%Oa<
* @version 1.0 ej^3YNh&
*/ U(,.D}PG
public class SortUtil { ahGT4d`)9
public final static int INSERT = 1; /XbW<dfl
public final static int BUBBLE = 2; v~=\H
public final static int SELECTION = 3; v("wKHWTI@
public final static int SHELL = 4; r*XLV{+4
public final static int QUICK = 5; N$#\Xdo
public final static int IMPROVED_QUICK = 6; ,:GN;sIXg
public final static int MERGE = 7; *y]+dK&-
public final static int IMPROVED_MERGE = 8; K{=PQ XSU
public final static int HEAP = 9; :L:&t,X
fY W|p<Q0
public static void sort(int[] data) { +B"0{>n}F
sort(data, IMPROVED_QUICK); ;rR/5d1!
} %!|O.xxRR
private static String[] name={ E^CiOTN
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" z]@6fM[
}; Tv$sqVe9
$[ z y
private static Sort[] impl=new Sort[]{ wT_h!W
new InsertSort(), 7wVH8^|
new BubbleSort(), ^4pto$#@O:
new SelectionSort(), rx!=q8=0R
new ShellSort(), n7! H:{L
new QuickSort(), FHg0E++?
new ImprovedQuickSort(), 6v732;^
new MergeSort(), j-b*C2l
new ImprovedMergeSort(), &c%Y<1e`%
new HeapSort() 0XU}B\'<
}; n}nEcXb
8@\7&C(g17
public static String toString(int algorithm){ "![L#)"s
return name[algorithm-1]; m_7 nz!h
} dh -,E
d)ahF[82
public static void sort(int[] data, int algorithm) { m%r/O&g
impl[algorithm-1].sort(data); #wR;|pN
} Zv!{{XO2;
,r^"#C0J}
public static interface Sort { 57I}RMT"
public void sort(int[] data); 8P: spD0
} F- rQ3
N4!<Xj
public static void swap(int[] data, int i, int j) { [f{VIE*?%
int temp = data; 4. qtp`
data = data[j]; MaY682}|y
data[j] = temp; v"O5u%P
} e2)autBe
} I4c!m_sr