[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; DVp5hR_$
} D]03eu
int i1=l; DtxE@,
int i2=mid+1; \=2m7v#E
for(int cur=l;cur<=r;cur++){ &Z^(y}jPr
if(i1==mid+1) #%,RJMv
data[cur]=temp[i2++]; R)8s
else if(i2>r) X&\d)/Y
data[cur]=temp[i1++]; 7=}F{U
else if(temp[i1] data[cur]=temp[i1++]; qYB~VE03
else 6z,Dyy]tl
data[cur]=temp[i2++]; a:rX9-**
} ]ya; v '
} %:9oDK
al^!,ykc
} X]j)+DX>
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改进后的归并排序: ,J=P,](
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package org.rut.util.algorithm.support; M4f;/`w
OYL]j{
import org.rut.util.algorithm.SortUtil; &Z("D7.G
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/** G-um`/<%
* @author treeroot :3ZYJW1
* @since 2006-2-2 ;/O#4]2*
* @version 1.0 `FF8ie8L
*/ o+O}Te
public class ImprovedMergeSort implements SortUtil.Sort { Yc Q=vt{
s}5+3f$f
private static final int THRESHOLD = 10; U]6&b
\}*k)$r
/* v1G"3fy9
* (non-Javadoc) 'o4p#`R:8
* ]1`g^Z@ 0
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) i\?*=\a
*/ k%'m*Tf
public void sort(int[] data) { x34f9! 't
int[] temp=new int[data.length]; yJx?M
mergeSort(data,temp,0,data.length-1); }%!tT\8
} xi~uv?f
oDB`iiBXQ
private void mergeSort(int[] data, int[] temp, int l, int r) { cDEJk?3+
int i, j, k; |+,[``d>"
int mid = (l + r) / 2; zU5Hb2a
if (l == r) k\)Cw
return; "h"NW[R
if ((mid - l) >= THRESHOLD) <X7\z
mergeSort(data, temp, l, mid); \[:/CxP
else < Bg8,;
insertSort(data, l, mid - l + 1); V\5 L?}
if ((r - mid) > THRESHOLD) =^DLywAh}u
mergeSort(data, temp, mid + 1, r); T? ,P*l
else Cr ?4Ngw
insertSort(data, mid + 1, r - mid); l1=JrpCan
e( X|3h|
for (i = l; i <= mid; i++) { wNJzwC&iQ
temp = data; Qeq5gN]
} kJ:F *34e=
for (j = 1; j <= r - mid; j++) { T(?HMyg3
temp[r - j + 1] = data[j + mid]; C(T;>if0NH
} d4?d4;{
int a = temp[l]; ,FzeOSy'p
int b = temp[r]; .4y>QN#VL
for (i = l, j = r, k = l; k <= r; k++) { o(kM9G|
if (a < b) { lK7m=[j
data[k] = temp[i++]; 266oTER]v:
a = temp; qO1tj'U<
} else { >JwLk[=j
data[k] = temp[j--]; u"xJjS
b = temp[j]; B@YyQ'
} _6@hTen`
} Q _iO(qu 6
} %^.%OCX:
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/** I`(l*U
* @param data *u6Y8IL1
* @param l BQ</g* $;
* @param i RkEN ,xWE
*/ {:nQl}
private void insertSort(int[] data, int start, int len) { `Pn[tuIO
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 6R;3%-D
} t>)45<PEw
} NSAF4e
} }ArpPU :]
} V D?*h
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堆排序： NG&_?|OmV
M6r^L6$N
package org.rut.util.algorithm.support; -D^A:}$
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import org.rut.util.algorithm.SortUtil; ?jQ](i&
2L_6x<u'
/** lS^(&<{
* @author treeroot |WryBzZ>on
* @since 2006-2-2 X@)z80
* @version 1.0 H1"q
*/ 1'v5/
public class HeapSort implements SortUtil.Sort{ @Y,7'0U
-m= 8&B
/* (non-Javadoc) 8N%Bn&
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) %%ae^*[!n
*/ zjL.Bhiud
public void sort(int[] data) { l&YKD,H};
MaxHeap h=new MaxHeap(); *1Z5+uVT[
h.init(data); OX:O^ (-r,
for(int i=0;i h.remove(); 6pOx'u>h+
System.arraycopy(h.queue,1,data,0,data.length); DD9?V}Yx
} 5m:i6,4
]{~NO{0@Y
private static class MaxHeap{ ; |/leu8
;< )~Y-
void init(int[] data){ ! Z`0(d
this.queue=new int[data.length+1]; juF{}J2
for(int i=0;i queue[++size]=data; RC|!+TD
fixUp(size); Z|9u]xL
} (}r|yE
} kPBV6+d~
y %$O-q
private int size=0; ;|p$\26S)%
Ch()P.n?
private int[] queue; ,B&fFis
R`";Z$~{
public int get() { +`M!D }!
return queue[1]; 8l?piig#
} +QM@VQ
YJS{i
public void remove() { G!8Z~CPF
SortUtil.swap(queue,1,size--); l:6,QaT1
fixDown(1); {wF&+kH3
} 8E&XbqP+
file://fixdown e6X[vc|Y}
private void fixDown(int k) { 8By,#T".
int j; .I VlEG0
while ((j = k << 1) <= size) { ki0V8]HP
if (j < size %26amp;%26amp; queue[j] j++; v]%WH~>
if (queue[k]>queue[j]) file://不用交换 }),w1/#5u8
break; H_!4>G@
SortUtil.swap(queue,j,k); "xMD,}+5$$
k = j; JxLf?ad.
} Iq+>qX
} UY2X
private void fixUp(int k) { L{l6Dd43q
while (k > 1) { .*$OQA
int j = k >> 1; Zn,>]X
if (queue[j]>queue[k]) HIGq%m=-x
break; ]Mj/&b>"e
SortUtil.swap(queue,j,k); 3ZTE<zRQ
k = j; Et"?8\"n7
} vvB(r!
} /!}'t
.t&R>9cZ^
} Pi%%z
H$ftGwS8
} p\C%%
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SortUtil： NVIK>cT6
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package org.rut.util.algorithm; ]maYUKqv}'
!@u>A_
import org.rut.util.algorithm.support.BubbleSort; o }Tz"bN
import org.rut.util.algorithm.support.HeapSort; d"G+8}.4
import org.rut.util.algorithm.support.ImprovedMergeSort; + SZYg[
import org.rut.util.algorithm.support.ImprovedQuickSort; =O _z(
import org.rut.util.algorithm.support.InsertSort; e98lhu"|H
import org.rut.util.algorithm.support.MergeSort; Md)zEj`\
import org.rut.util.algorithm.support.QuickSort; P+MA*:
import org.rut.util.algorithm.support.SelectionSort; =k3!RW'
import org.rut.util.algorithm.support.ShellSort; CV$],BM
ej&<GM|
/** c8)/:xxl
* @author treeroot gIR^)m
* @since 2006-2-2 *5sBhx
* @version 1.0 WWwUwUi
*/ cN! uV-e
public class SortUtil { !>x|7
public final static int INSERT = 1; s#h8%['
public final static int BUBBLE = 2; _a_xzv'
public final static int SELECTION = 3; @L84>3O
public final static int SHELL = 4; :J}t&t
public final static int QUICK = 5; \&V0vN1
public final static int IMPROVED_QUICK = 6; rdJm{<
public final static int MERGE = 7; -B#yy]8
public final static int IMPROVED_MERGE = 8; d{et8N
public final static int HEAP = 9; 4@ILw
s"=6{EVqk3
public static void sort(int[] data) { R cY>k
sort(data, IMPROVED_QUICK); Xqp|VbDca
} <VjJAu
private static String[] name={ Gy1xG.yM~
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 0YH+B
}; *y`%]Hy<
r%wA&FQ8U
private static Sort[] impl=new Sort[]{ Uu6L~iB
new InsertSort(), r#WT`pav
new BubbleSort(), n?#!VN3
new SelectionSort(), 78n=nHS
new ShellSort(), U5Erm6U:
new QuickSort(), HDM<w+ZxX
new ImprovedQuickSort(), T1B|w"In
new MergeSort(), DG(7|`(aY
new ImprovedMergeSort(), "Z,q?Fc
new HeapSort() hf!|\f
}; R~L0{` 0
.F&9.#>
public static String toString(int algorithm){ \^+ILYO:$
return name[algorithm-1]; z;]CmR@Ki
} Auy".br'
RnVtZ#SCh
public static void sort(int[] data, int algorithm) { VvByHcLv
impl[algorithm-1].sort(data); ^s7,_!.Pq
} +5<k-0v
&zL#hBE
public static interface Sort { O(2cWQ
public void sort(int[] data); ,zcQS-e2
} UIJx*
5FvOznK^e
public static void swap(int[] data, int i, int j) { Mro4`GL
int temp = data; ,7]k fB
data = data[j]; `znB7VQ0
data[j] = temp; OL59e%X
} h4&;?T S
} WiNT;v[