[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; %7?v='s=
} OAQ'/{~7
int i1=l; XJ;JDch
int i2=mid+1; 6gfdXVN5
for(int cur=l;cur<=r;cur++){ +<ey Iw
if(i1==mid+1) Up$vBE8i]
data[cur]=temp[i2++]; k]`3if5>
else if(i2>r) <!vAqqljt
data[cur]=temp[i1++]; Uq6..<#
else if(temp[i1] data[cur]=temp[i1++]; n[/|M
else %j=,c{`Q
data[cur]=temp[i2++]; s"|N-A=cS
} YtrMJ"
} ?Y~>H2
"zO+!h'o
} i4"xvLK4
Bv |Z)G%RR
改进后的归并排序: |JL47FR
]eq3cwR[|
package org.rut.util.algorithm.support; \0pJ+@\T9
WiL~b =fT
import org.rut.util.algorithm.SortUtil; P + nT%
mYk5f_}
/** 4>^ %_Xj[
* @author treeroot 2g^Kf,m
* @since 2006-2-2 E}qeh"sJt
* @version 1.0 pz^"~0o5
*/ mHox
public class ImprovedMergeSort implements SortUtil.Sort { d}',Bl+u{$
/=\__$l)
private static final int THRESHOLD = 10; ^dP@QMly6
R#bg{|
/* f(?`PD[
* (non-Javadoc) +Z[%+x92
* 0p$?-81BJ
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ?xX`_l
*/ ^dYLB.'=
public void sort(int[] data) { D@Fa~O$75
int[] temp=new int[data.length]; k 9Kv
mergeSort(data,temp,0,data.length-1); 4#=!VK8ZH
} Xb3vvHdI
VPg`vI$(X
private void mergeSort(int[] data, int[] temp, int l, int r) { *(d^k;
int i, j, k; &^9>h/-XT
int mid = (l + r) / 2; M)EUR0>8
if (l == r) -ij1%#tz
return; J\
if ((mid - l) >= THRESHOLD) Ye!=
mergeSort(data, temp, l, mid); e= "/oo
else a+mq=K
insertSort(data, l, mid - l + 1); ,lA J{5\#
if ((r - mid) > THRESHOLD) N &p=4
mergeSort(data, temp, mid + 1, r); Ze Shn
else foE2rV/Y
insertSort(data, mid + 1, r - mid); :ykZ7X&
i`8!Vm
for (i = l; i <= mid; i++) { :eQxdi'
temp = data; 3g2t{%
} ZLKS4
for (j = 1; j <= r - mid; j++) { <WBGPzVZE
temp[r - j + 1] = data[j + mid]; YQX>)'
} D?5W1m]E,s
int a = temp[l]; ?67j+)
int b = temp[r]; |_[mb(<|
for (i = l, j = r, k = l; k <= r; k++) { w6Tb<ja
if (a < b) { ieS5*@^k
data[k] = temp[i++]; q}BQu@'H
a = temp; ~w[zX4@
} else { ^Z:x poz,
data[k] = temp[j--]; ;{Z2i%
b = temp[j]; A7_*zR@
} ,%nmCetD@
} ~P6K)V|@<
} L1C'V/g
/'VCJjzZ
/** ocgbBE
* @param data ~T4=Id
* @param l Z/x<U.B
* @param i *bRH,u
*/ o~>p=5t
private void insertSort(int[] data, int start, int len) { <JH0 &
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); "?qu(}|
} FT(EH
} [V jd)%
} y'yaCf
} ha8do^x
-U/&3
堆排序： J;T_9
6lWO8j^BN
package org.rut.util.algorithm.support; 5K6_#g4"
MB"?^~Sm
import org.rut.util.algorithm.SortUtil; Va*Uwy?x/)
s9[v_(W
/** At bqj?
* @author treeroot 4qm5`o\hb
* @since 2006-2-2 eEc;w#
* @version 1.0 p Y>yJ)
*/ Ca1)>1Vz
public class HeapSort implements SortUtil.Sort{ u5CT7_#)
&_90E
/* (non-Javadoc) >2g CM
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ? ! 1uw
*/ F~l3?3ZV
public void sort(int[] data) { ?ST}0F00}
MaxHeap h=new MaxHeap(); Yaa M-o
h.init(data); q75F^AvH
for(int i=0;i h.remove(); 09%eaoW
System.arraycopy(h.queue,1,data,0,data.length); %74Ms
} hU=J^Gi0
\ I?;%
private static class MaxHeap{ x(=kh%\;
ap6Vmp
void init(int[] data){ fnmZJJ,Q
this.queue=new int[data.length+1]; LiB0]+wzj
for(int i=0;i queue[++size]=data; m1[QD26
fixUp(size); T:!sfhrZ~<
} l E&hw
} 3mm`8!R
IYQYW.`ly
private int size=0; /p%K[)T(
~hxB Pn."
private int[] queue; q]r!5&Z
QKP9*dz
public int get() { k=~?!+p7
return queue[1]; =V,'f
} @`_j't,
N0qC/da1
public void remove() { H|TzD"2N
SortUtil.swap(queue,1,size--); Bw#ubQJ8}
fixDown(1); Uv+pdRXn
} %#]T.g
file://fixdown ?D\%ZXo
private void fixDown(int k) { _$bx4a
int j; Z?X$8o^Z
while ((j = k << 1) <= size) { )>Lsj1qk
if (j < size %26amp;%26amp; queue[j] j++; {!/y@/NK2
if (queue[k]>queue[j]) file://不用交换 V.-?aXQ*
break; <m6Xh^Ko;
SortUtil.swap(queue,j,k); pJv?
k = j; C`jP8"-
} <HzAh<_@F
} \YKh'|04
private void fixUp(int k) { PCLSY8N
while (k > 1) { =:g^_Hy
int j = k >> 1; hx2C<;s4
if (queue[j]>queue[k]) .gPsJ?b
break; %&]}P;&
SortUtil.swap(queue,j,k); R_1C+
k = j; | 5L1\O8#
} gP`!MlY@
} Q./lX:
%zelpBu+
} fgp7 |;Y
qA~D*=
} 1tr>D:c\
XeB>V.<y
SortUtil： A5`7o9
<eh(~
package org.rut.util.algorithm; xXx`a\i
h#n8mtt&i
import org.rut.util.algorithm.support.BubbleSort; ;OPCBdr
import org.rut.util.algorithm.support.HeapSort; C5WCRg5&
import org.rut.util.algorithm.support.ImprovedMergeSort; {fb~`=?
import org.rut.util.algorithm.support.ImprovedQuickSort; j0%0yb{-^
import org.rut.util.algorithm.support.InsertSort; TcP1"wc
import org.rut.util.algorithm.support.MergeSort; =Hx~]1
import org.rut.util.algorithm.support.QuickSort; /-hF<oNQ
import org.rut.util.algorithm.support.SelectionSort; /SUV'J)
import org.rut.util.algorithm.support.ShellSort; QlS5B.h,
x ?V/3zW
/** nfJ8Rt
* @author treeroot 3'"M31iA
* @since 2006-2-2 op|mRJBq;
* @version 1.0 ~4>Xi* B
*/ &53#`WgJ
public class SortUtil { V-cuG.
public final static int INSERT = 1; Fm;)7.% >
public final static int BUBBLE = 2; @\DD|o67
public final static int SELECTION = 3; Ad,r(0a LZ
public final static int SHELL = 4; qbEj\ b[
public final static int QUICK = 5; 9V66~Bf5
public final static int IMPROVED_QUICK = 6; Ds G *
public final static int MERGE = 7; `Of wl%G
public final static int IMPROVED_MERGE = 8; >#:/ GN?
public final static int HEAP = 9; PD}R7[".>
_RW[]MN3*
public static void sort(int[] data) { psZeu*/r
sort(data, IMPROVED_QUICK); bF KPV%`
} jccW8g~ ~
private static String[] name={ +_gT|vlU
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" S[a5k;8GL
}; O|>1~^w
da2[
private static Sort[] impl=new Sort[]{ ILi5WuOYX
new InsertSort(), 0`!Q-G7
new BubbleSort(), baNfS
new SelectionSort(), ZW?7g+P
new ShellSort(), UTTC:=F+
new QuickSort(), FqTkUWd,#
new ImprovedQuickSort(), Wv0'?NL.
new MergeSort(), SznE:+
new ImprovedMergeSort(), YSV,q@I&1
new HeapSort() <nvWC/LU
}; aVP|:OAj
Xo@YTol
public static String toString(int algorithm){ $&8h=e~]-
return name[algorithm-1]; GVEWd/:X(
} Y(y9l{'
W"kw>JEt
public static void sort(int[] data, int algorithm) { VWshFI
impl[algorithm-1].sort(data); &{ {DS
} cY2-T#rL
N}Ks[2
public static interface Sort { }iSakq'
public void sort(int[] data); |"yf@^kdC
} S/-7Zo&w+
8sIrG
public static void swap(int[] data, int i, int j) { {F:v$ K
int temp = data; iw fp'
data = data[j]; w"v'dU^
data[j] = temp; }%YHm9)
} 4VNb`!e
} grQnV' q