[JAVA]用Java实现的各种排序

ヾ1.嗰rёn

级别: 终身会员

发帖: 3743

铜板: 8

人品值: 493

贡献值: 9

交易币: 0

好评度: 3746

信誉值: 0

金币: 0

所在楼道

只看楼主更多操作楼层直达

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; |&7l*j(\
} G'%mmA\
int i1=l; <7qM;)g
int i2=mid+1; $8b/"Qm
for(int cur=l;cur<=r;cur++){ qzXch["So
if(i1==mid+1) F"_SCA?9?
data[cur]=temp[i2++]; zKR_P{W>^
else if(i2>r) Y|Z*|c.4OK
data[cur]=temp[i1++]; aX~7NslR
else if(temp[i1] data[cur]=temp[i1++]; 5 gE
else hTF]-& hZ
data[cur]=temp[i2++]; Wn|w~{d{
} v vFX\j3
} h4]yIM`8d
nlKWZYv
} N(Cfv3{
3SDw-k
改进后的归并排序: ]krOPM/
=6ojkTk
package org.rut.util.algorithm.support; zg|]Ic
i=Y#kL~f
import org.rut.util.algorithm.SortUtil; wzF"^CJ
NcdOzx>
/** =OCHV+m
* @author treeroot /P320[B}m&
* @since 2006-2-2 x.!%'{+{
* @version 1.0 ~qRP.bV%f
*/ ^;M!u8[
public class ImprovedMergeSort implements SortUtil.Sort { e4t'3So
60*=Bs%b
private static final int THRESHOLD = 10; l%U{Unwu
) "'J]6
/* z@dHXj )
* (non-Javadoc) hC,EO&
* `Q,03W#GJ%
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) a *>$6H;
*/ Xfe,ZC)
public void sort(int[] data) { hH>t
int[] temp=new int[data.length]; =MA$xz3
mergeSort(data,temp,0,data.length-1); P@)zNik[
} zbrDDkZ1
Y*0mC"n}
private void mergeSort(int[] data, int[] temp, int l, int r) { HqOzArp3
int i, j, k; |GLa`2q|
int mid = (l + r) / 2; 1O8RGk4
if (l == r) ? 3Td>x
return; so1% MV
if ((mid - l) >= THRESHOLD) .,I^)8c
mergeSort(data, temp, l, mid); Bf.@B0\
else "4Cb dD//
insertSort(data, l, mid - l + 1); 40+~;20
if ((r - mid) > THRESHOLD) yi PMJ
mergeSort(data, temp, mid + 1, r); THC34u]
else R0vWj9nPh
insertSort(data, mid + 1, r - mid); B\`4TU}kE
4vF1
for (i = l; i <= mid; i++) { ; &$djP
temp = data; rz5AIe>Hm
} Cjdw@v0;
for (j = 1; j <= r - mid; j++) { M"W-|t)~
temp[r - j + 1] = data[j + mid]; _DS_AW}D
} !{jDZ?z{h
int a = temp[l]; !;>j(xc
int b = temp[r]; Y<odXFIS
for (i = l, j = r, k = l; k <= r; k++) { M, f6UYo=
if (a < b) { @-)jU!
data[k] = temp[i++]; #fd;]
a = temp; bejvw?)S.
} else { .*+%-%CbP
data[k] = temp[j--]; Xf(H_&K
b = temp[j]; {wVj-w=<W
} [_q3 02
} ,ir(~g+{g
} B*W)e$
c"~+Y2]tL
/** J4EQhuQ
* @param data Bu$Z+o
* @param l e'Njl?>3
* @param i ,t2Mur
*/ yy8h8{=g
private void insertSort(int[] data, int start, int len) { ei%L[>N
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Pv@Lx+k
} XnR9/t
} /x\{cHAt8J
} UDl[
} ,ELbm
\iVb;7r)9:
堆排序： xA/Ein0
oK\{#<gCZ
package org.rut.util.algorithm.support; ai0am
Q*&k6A"jx
import org.rut.util.algorithm.SortUtil; @'P\c
/r2*le (H
/** $I}7EI
* @author treeroot `3GYV|LeQ
* @since 2006-2-2 3HCH-?U5
* @version 1.0 |T3F:],`
*/ 2z#gn9Wb
public class HeapSort implements SortUtil.Sort{ oy{ {d
(@X].oM^y
/* (non-Javadoc) TuR.'kE@
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) `,~8(rIM
*/ "0Ca;hSLM2
public void sort(int[] data) { H+lBb$
MaxHeap h=new MaxHeap(); ,0k3Qi%
h.init(data); 1!/WC.0
for(int i=0;i h.remove(); bMU0h,|]
System.arraycopy(h.queue,1,data,0,data.length); : ZehBu
} *{TB<^ *
9\f%+?p
private static class MaxHeap{ pT ]:TRPS
'Sk-L 5
void init(int[] data){ z"D'rHxy
this.queue=new int[data.length+1]; Lgr(j60s
for(int i=0;i queue[++size]=data; 7UnB]-:.
fixUp(size); xQA6!j
} zw,( kv
} Xlg0u.
>_esLsPWh]
private int size=0; "Zr+>a
!N"Y
private int[] queue; C[c^zn
8>4@g!9E
public int get() { \A#YL1hh
return queue[1]; Q&\(m[:)
} ku*H*o~
'j&+Pg)@
public void remove() { ^(79SOZC
SortUtil.swap(queue,1,size--); V)q|U6R
fixDown(1); ip)gI&kN`z
} HnlCEW,^o
file://fixdown P80mK-Iyv_
private void fixDown(int k) { 4C]>{osv
int j; V;@kWE>3
while ((j = k << 1) <= size) { qE:/~Q0
if (j < size %26amp;%26amp; queue[j] j++; 8r{:di*
if (queue[k]>queue[j]) file://不用交换 BU;o$"L
break; xryXO(
SortUtil.swap(queue,j,k); y*oH"]D
k = j; Ng,<4;
} w%'8bH!
} HuB\92u
private void fixUp(int k) { }[FP"#
while (k > 1) { 6v1F.u
int j = k >> 1; QY7Thnp1
if (queue[j]>queue[k]) lX)ZQY:=:
break; SOg>0VH)
SortUtil.swap(queue,j,k); 3OZu v};k
k = j; /k_?S?
} /l6r4aO2=
} J n~t>?
"~+?xke5z
} )Up'W
u*"mdL2
} J}?:\y<
QJ%[6S
SortUtil： -h%!#g
z\g6E/%%
package org.rut.util.algorithm; yb4Jsk5%
LFwRTY,G
import org.rut.util.algorithm.support.BubbleSort; $_5a1Lq1
import org.rut.util.algorithm.support.HeapSort; ,'}qLor
import org.rut.util.algorithm.support.ImprovedMergeSort; N0mP EF2
import org.rut.util.algorithm.support.ImprovedQuickSort; #0uD&95<
import org.rut.util.algorithm.support.InsertSort; $-*E
import org.rut.util.algorithm.support.MergeSort; "o{o9.w
import org.rut.util.algorithm.support.QuickSort; yH<a;@C
import org.rut.util.algorithm.support.SelectionSort; 4+1aW BJ2
import org.rut.util.algorithm.support.ShellSort; Bj1{=Pvl
Or:a\qQ1
/** KB@F^&L {
* @author treeroot S!oG|%VuB#
* @since 2006-2-2 \""sf{S9
* @version 1.0 :i};]pR
*/ 8`]1Nt!*B
public class SortUtil { ~E^lKe
public final static int INSERT = 1; Gm1[PAj
public final static int BUBBLE = 2; y/9aI/O'
public final static int SELECTION = 3; {3H)c^Q
public final static int SHELL = 4; rY:A LA
public final static int QUICK = 5; Et0[HotO
public final static int IMPROVED_QUICK = 6; 4z*An}ol]
public final static int MERGE = 7; \ )'`F; P
public final static int IMPROVED_MERGE = 8; #]vs*Sz
public final static int HEAP = 9; rEfo)jod
*f ;">(`o*
public static void sort(int[] data) { L`6 R
sort(data, IMPROVED_QUICK); #)7THx/=
} "I}]]?y
private static String[] name={ +=o?&
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ba`V`0p-(
}; ,z@"pI b
NW%u#MZ[h
private static Sort[] impl=new Sort[]{ qGK -f4
new InsertSort(), MpCK/eiC
new BubbleSort(), 6jaol'{SuH
new SelectionSort(), Uja`{uc
new ShellSort(), lKT<aYX
new QuickSort(), xsN)a!
new ImprovedQuickSort(), 9*b(\Z)N
new MergeSort(), 7FBaN7l
new ImprovedMergeSort(), r0'6\MS13
new HeapSort() HQ0fY
}; 2Y-NxW^]
d) i64"
public static String toString(int algorithm){ }bA@QEJ
return name[algorithm-1]; %j4AX
} ?nc:B]=pTY
, b;WCWm
public static void sort(int[] data, int algorithm) { GUH-$rA
impl[algorithm-1].sort(data); SSH 1Ge5|
} @4FG& >kQ
Ro:DAxi@L
public static interface Sort { #=V[vbTY
public void sort(int[] data); $!q(-+(
} W+5<=jXFB
'2=$pw
public static void swap(int[] data, int i, int j) { BK/_hNz
int temp = data; zMI_8lNz
data = data[j]; 9o<5Z=
data[j] = temp; Rv=rO|&]
} 7,BULs\g
} L!l`2[F|