[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; hLuv
} v{ohrpb0v
int i1=l; (BxmV1
int i2=mid+1; w:deQ:k
for(int cur=l;cur<=r;cur++){ v&/H6r#E.
if(i1==mid+1) >lQa"F=
data[cur]=temp[i2++]; $H)!h^7^9
else if(i2>r) )$i,e`T
data[cur]=temp[i1++]; +"BJjxG
else if(temp[i1] data[cur]=temp[i1++]; [ei~Xkzkj
else %s+'"E"E
data[cur]=temp[i2++]; R6fkc^
} sU*?H`U3d
} /t7f5mA
.AO-S)wHR
} b=2:\F
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改进后的归并排序: V,Nu!$)J
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package org.rut.util.algorithm.support; <7rj,O1=
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import org.rut.util.algorithm.SortUtil; Y7p@NG&1q
&ck}3\sQ
/** #;^UW
* @author treeroot e/:?9
* @since 2006-2-2 hI*v)c
* @version 1.0 h0k?(O
*/ ;Bz|hB{
public class ImprovedMergeSort implements SortUtil.Sort { k;t G-~\d
6=$<R4B
private static final int THRESHOLD = 10; V-go?b`
F09%f"9
/* |X A0F\
* (non-Javadoc) fvH{va.
* P)f8lU^z
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) g&F$hm
*/ Y ?n4#J<
public void sort(int[] data) { d ([~o
int[] temp=new int[data.length]; yc3/5]E&
mergeSort(data,temp,0,data.length-1); &}P#<"Fo8Q
} vw3[(_MV3_
JZxA:dg l
private void mergeSort(int[] data, int[] temp, int l, int r) { 0%L:jq{5
int i, j, k; =0EKrG
int mid = (l + r) / 2; O9By5j 4
if (l == r) VPT?z
return; SZrc-f_
if ((mid - l) >= THRESHOLD) ^ }5KM87
mergeSort(data, temp, l, mid); fu~iF
else f9>pMfi:@
insertSort(data, l, mid - l + 1); yBs-bp"-
if ((r - mid) > THRESHOLD) zGg)R
mergeSort(data, temp, mid + 1, r); #\Y`?
else >%92,hg
insertSort(data, mid + 1, r - mid); W&9qgbO]
,qp8Rg|3j
for (i = l; i <= mid; i++) { 3]JJCaf
temp = data; ."BXA8c;A
} juF=ZW%i
for (j = 1; j <= r - mid; j++) { *Us}E7/"'
temp[r - j + 1] = data[j + mid]; L(Twclrb
} {vW0O&[
int a = temp[l]; LFi* O&
int b = temp[r]; ;DnUeE8
for (i = l, j = r, k = l; k <= r; k++) { vI(LIfe;
if (a < b) { dz/@]a
data[k] = temp[i++]; 1DAU*^-
a = temp; *`w>\},su
} else { m`8{arz2
data[k] = temp[j--]; J>T98y/))
b = temp[j]; &XcPHZy'
} z)^.ai,:0
} t~K[`=G\ex
} 5ta;CG
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/** &)tv4L&
* @param data vO9=CCxvq
* @param l 6U8esPs,
* @param i iZnLgkk@
*/ JSju4TQ4
private void insertSort(int[] data, int start, int len) { ._]Pz6
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); W>+`e]z
} :PN%'~}n
} Q~wS2f`)
} J`[jub
} wI 7gHp
#P}n+w_@
堆排序： w$iPFZC'
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package org.rut.util.algorithm.support; ydOG8EI
Oj%5FUP~[%
import org.rut.util.algorithm.SortUtil; x5PM]~"p
s92ol0`
/** WO%pX+PoH
* @author treeroot L58H)V3Pn
* @since 2006-2-2 5p~5-_JX
* @version 1.0 G/3T0d+-
*/ /]J\/Z>
public class HeapSort implements SortUtil.Sort{ 9@"pR;X@
;Q vQ fV4
/* (non-Javadoc) T'lycc4~a
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) SOsz=bVx
*/ (m!kg
public void sort(int[] data) { uc"%uc'
MaxHeap h=new MaxHeap(); Ue;Z)}
h.init(data); }L|B@fW
for(int i=0;i h.remove(); G+2fmVB*X
System.arraycopy(h.queue,1,data,0,data.length); > fV"bj.
} 7O|`\&RYR
F%lC%~-qh
private static class MaxHeap{ ^4]=D nd%
V+lS\E.
void init(int[] data){ Z5U\>7@&8
this.queue=new int[data.length+1]; o58c!44
for(int i=0;i queue[++size]=data; "S'Yn-
fixUp(size); (m Yi
} *rxYal4ad
} $u,6x~>
qk^/&j
private int size=0; |/xA5_-N
~};q/-[r
private int[] queue; hfbu+w):
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public int get() { sx7zRw >X
return queue[1]; T3=h7a %=
} [x, `)Fk
-:r<sv$
public void remove() { 0>-}c>
SortUtil.swap(queue,1,size--); t~ I;IB
fixDown(1); xuqG)HthRS
} w1zMY:9
file://fixdown P$y'``
private void fixDown(int k) { q4!\^HwQ
int j; vY.VFEP/
while ((j = k << 1) <= size) { dJrUcZBr
if (j < size %26amp;%26amp; queue[j] j++; CflyK@
if (queue[k]>queue[j]) file://不用交换 6Ktq7'Z@
break; bnvY2-O6
SortUtil.swap(queue,j,k); [h B$%i]\<
k = j; ]i,o+xBKH
} -Mrt%1g
} &k_LK
private void fixUp(int k) { 7KUf,0D
while (k > 1) { v \;/P
int j = k >> 1; 7J6Z?
if (queue[j]>queue[k]) F_w+8)DZ
break; Bnwq!i!M
SortUtil.swap(queue,j,k); JP( tf+
k = j; ~bzac2Rp
} *m>[\)
} ^gyI-S(;
Jo;&~/V
} N5K2Hv<"
K3=0D!Dq
} BL>~~
F3o"ETle
SortUtil： 0cfGI%
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package org.rut.util.algorithm; s%vy^x29
qW4\t
import org.rut.util.algorithm.support.BubbleSort; >Sw?F&
import org.rut.util.algorithm.support.HeapSort; ra^%__N}
import org.rut.util.algorithm.support.ImprovedMergeSort; Ax=)J{4v
import org.rut.util.algorithm.support.ImprovedQuickSort; 16@<G
import org.rut.util.algorithm.support.InsertSort; F+BCzsm7$
import org.rut.util.algorithm.support.MergeSort; @}PX:*c
import org.rut.util.algorithm.support.QuickSort; eAP 8!
import org.rut.util.algorithm.support.SelectionSort; z"QtP[_m
import org.rut.util.algorithm.support.ShellSort; PC255
Z'5&N5hx
/** s7:_!Nd@8
* @author treeroot y>h9:q|
* @since 2006-2-2 pNQ7uy
* @version 1.0 |Go$z3bx
*/ s]A8C^;c
public class SortUtil { [%6)
public final static int INSERT = 1; pH3\X cn
public final static int BUBBLE = 2; tV pXA'"!x
public final static int SELECTION = 3; X+u1p?
public final static int SHELL = 4; %`]!atH
public final static int QUICK = 5; Y+g(aak+.
public final static int IMPROVED_QUICK = 6; WLVkrTvX
public final static int MERGE = 7; B2LXF3#/
public final static int IMPROVED_MERGE = 8; y|0/;SjV
public final static int HEAP = 9; p0CPeH
a[rb-Z
public static void sort(int[] data) { o F_rC[
sort(data, IMPROVED_QUICK); D ZZRu8~
} N|"kuRN#
private static String[] name={ +mR^I$9
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" G*%U0OTi
}; H)&iFq
hz<TjWXv'
private static Sort[] impl=new Sort[]{ ;P8%yf
new InsertSort(), `YZl2c<w*
new BubbleSort(), tGXH)=K
new SelectionSort(), %2\Pe 2Z
new ShellSort(), K/}x'*=
new QuickSort(), {^;7DV:
new ImprovedQuickSort(), ?uJX
new MergeSort(), DMp@B]>
new ImprovedMergeSort(), 3'A0{(b
new HeapSort() fJk'5kv
}; >XiT[Ru
2w+4B4
public static String toString(int algorithm){ s?9Y3]&+&M
return name[algorithm-1]; 8gt*`]I
} Bzt:9hr6BO
qJonzFp7
public static void sort(int[] data, int algorithm) { \x4:i\Fx@
impl[algorithm-1].sort(data); NN+;I^NqW&
} }[@Q**j(
$txF|Fj]^A
public static interface Sort { uz$p'Q
public void sort(int[] data); ^k^?>h
} ~h=iZ/g_^_
fF#Fc&B
public static void swap(int[] data, int i, int j) { ;GOu'34j
int temp = data; [C;Neslo
data = data[j]; XUUP#<,s
data[j] = temp; BjTgZ98J
} cmCD}Skk
} SG0PQ