[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; bMe/jQuL.$
} :;Z?2P5i
int i1=l; +9LIpU&5
int i2=mid+1; qiEw[3Za]'
for(int cur=l;cur<=r;cur++){ []^fb,5a
if(i1==mid+1) sz;B-1^6
data[cur]=temp[i2++]; @ sLb=vb
else if(i2>r) JZ=ahSi
data[cur]=temp[i1++]; Qy0Zj$,Z
else if(temp[i1] data[cur]=temp[i1++]; dsJMhB_41U
else \ @XvEx%
data[cur]=temp[i2++]; Fpe>|"&
} 'uy\vR&Pz
} 3|++2Z{},
$2!|e,x
} Fsdp"X.
s=KK)6T
改进后的归并排序: olA 1,8
?7;_3+T#
package org.rut.util.algorithm.support; Hs9; &C
2TQyQ%
import org.rut.util.algorithm.SortUtil; 2!@ER i
MBp,!_Q6
/** JWB3;,S
* @author treeroot dd?ZQ:n
* @since 2006-2-2 \US'tF)/
* @version 1.0 L0^rw|Z%'
*/ ?aMd#.&
public class ImprovedMergeSort implements SortUtil.Sort { ve3-GWT{C
:t)<$dtf[
private static final int THRESHOLD = 10; D MzDV_
$M:Ru@Du2
/* K>a@AXC
* (non-Javadoc) ;\mTm;]G
* !3*:6
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) A#;TY:D2
*/ ?z{Z!Bt?=)
public void sort(int[] data) { rl__3q
int[] temp=new int[data.length]; ,$oz1,Q/
mergeSort(data,temp,0,data.length-1); <>l!
} 7 'B9z/
(R{|*:KP
private void mergeSort(int[] data, int[] temp, int l, int r) { W{!Slf
int i, j, k; ! <O,xI'
int mid = (l + r) / 2; m[w 8|[
if (l == r) 26[.te9
return; IKs2.sj"o
if ((mid - l) >= THRESHOLD) ZHN}:W/p
mergeSort(data, temp, l, mid); Z*Lv!6WS
else Y I?4e7Z+
insertSort(data, l, mid - l + 1); HYcwtw6
if ((r - mid) > THRESHOLD) o0B3G
mergeSort(data, temp, mid + 1, r); sry`EkS
else 1)N~0)dO
insertSort(data, mid + 1, r - mid); u^X,ASkQ
4xsnN@b
for (i = l; i <= mid; i++) { n38l!m(.
temp = data; x6iT"\MO
} ;p8,=w
for (j = 1; j <= r - mid; j++) { j"Y5j B`
temp[r - j + 1] = data[j + mid]; L=v"5)m2R
} @\)a&p]a
int a = temp[l]; l(A>Rw|
int b = temp[r]; y&(R1Y75
for (i = l, j = r, k = l; k <= r; k++) { JQO%-=t
if (a < b) { *nYb9.T]i
data[k] = temp[i++]; OE8H |?%
a = temp; dt1,!sHn
} else { ;e#bl1%#
data[k] = temp[j--]; Z.{r%W{2
b = temp[j]; UEh-k"
} r4wnfy
} y^tp^
} MU#$tXmnC
a"pejW`m
/** ^hIKDc!.m
* @param data @;P\`[(*
* @param l SHt#%3EU
* @param i H'2Un(#Al
*/ jPyhn8Vw
private void insertSort(int[] data, int start, int len) { 38HnW
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); mj^]e/s%
} EVE<LF?
} P6([[mmG
} lBcRt)_O7
} {S=gXIh(y
3!<} -sW4
堆排序： QU%'z/dip
d*(wU>J '
package org.rut.util.algorithm.support; r\f|r$i
ypA)G/;
import org.rut.util.algorithm.SortUtil; -mPrmapb3
`ek On@T0
/** O,A}p:Pgs
* @author treeroot ab-MEN`5
* @since 2006-2-2 /c9%|<O%
* @version 1.0 D-!#TN`Y
*/ @[] A&)B
public class HeapSort implements SortUtil.Sort{ B$kp\yL
e)x;3r"j
/* (non-Javadoc) @Tl!A1y?
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) |Je+y;P7
*/ z,#3YC{'
public void sort(int[] data) { sxBRg=
MaxHeap h=new MaxHeap(); A_\ZY0Xt
h.init(data); {Vj25Gt
for(int i=0;i h.remove(); A1u|L^
System.arraycopy(h.queue,1,data,0,data.length); ( O>oN~
} <(<19t5.
c?1:='MC
private static class MaxHeap{ +iL,8eW
9X2lH~C
void init(int[] data){ 1>1ii
this.queue=new int[data.length+1]; t<Z)D0.
for(int i=0;i queue[++size]=data; .Iret:
fixUp(size); D@yuldx'/
} gUq)M
} l8_TeO
+v}R-gNR
private int size=0; koizk&)
xp>p#c
private int[] queue; }nW)+
G?OwhX
public int get() { J&IFn/JK$
return queue[1]; @Fl&@ $
} G2x5%`
+yYv"J
public void remove() { 7v~\c%1V
SortUtil.swap(queue,1,size--); }Pj3O~z
fixDown(1); %Jr6pmc
} $*Q_3]AY]
file://fixdown 5_mb+A n,
private void fixDown(int k) { Q3vWwP;t~
int j; bh8IF,@a
while ((j = k << 1) <= size) { W,^(FR.
if (j < size %26amp;%26amp; queue[j] j++; B!hrr
if (queue[k]>queue[j]) file://不用交换 zJfoU*G/B
break; _S(]/d(c
SortUtil.swap(queue,j,k); uT}Jw
k = j; c9dH ^t
} 3psCV=/z
} (zFUC]
private void fixUp(int k) { ve#cz2Z
while (k > 1) { tzxp0&:Z].
int j = k >> 1; hr<E%J1k%
if (queue[j]>queue[k]) "}bk *2
break; R;X8%'
SortUtil.swap(queue,j,k); lxRzyx
k = j; 9GdrJ~h
} U=C8gVb{Hq
} #pxc6W /
27vLI~
} / 4K*iq
H7e/6t<x
} c?0uv2*Yh
gev7eGH<
SortUtil： #EpDIL
VZ*Q|
package org.rut.util.algorithm; mmXLGLMd
Q~4o{"3.'
import org.rut.util.algorithm.support.BubbleSort; O,_2djd
import org.rut.util.algorithm.support.HeapSort; Y.?|[x0Wh
import org.rut.util.algorithm.support.ImprovedMergeSort; Y"mD)\Bw?
import org.rut.util.algorithm.support.ImprovedQuickSort; eBTy!!
import org.rut.util.algorithm.support.InsertSort; ]D7z&h
import org.rut.util.algorithm.support.MergeSort; N1Y*IkW"
import org.rut.util.algorithm.support.QuickSort; 1;ulqO
import org.rut.util.algorithm.support.SelectionSort; `5`Pv'`
import org.rut.util.algorithm.support.ShellSort; #](k,% 2
$7aRf'
/** {=7W;uL
* @author treeroot Y.yM1 z
* @since 2006-2-2 PZO7eEt8
* @version 1.0 Z{/C4" F
*/ F'Fc)9qFa<
public class SortUtil { 0x0.[1mB
public final static int INSERT = 1; M6!kn~
public final static int BUBBLE = 2; MUNeGqv
public final static int SELECTION = 3; "HVwm>qEi
public final static int SHELL = 4; -,96Qg4vI
public final static int QUICK = 5; 1uv"5`%s
public final static int IMPROVED_QUICK = 6; 5SX0g(C
public final static int MERGE = 7; E8>npDFv.
public final static int IMPROVED_MERGE = 8; [*?P2.bf
public final static int HEAP = 9; Tm_vo-
T~%5^+[h
public static void sort(int[] data) { gsc*![N
sort(data, IMPROVED_QUICK); &P!^k0NJR
} E[LXZh
private static String[] name={ Bw"L!sZ
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" <V"'j
}; s.KJYP
F& H~JJ
private static Sort[] impl=new Sort[]{ I~"-
new InsertSort(), {C*mn!u
new BubbleSort(), Q-}oe Q
new SelectionSort(), >Z|4/PF
new ShellSort(), UNYU2ze'
new QuickSort(), "C=HBJdYB5
new ImprovedQuickSort(), yN~=3b>
new MergeSort(), ^gkyi/z
new ImprovedMergeSort(), Qkqn~>
new HeapSort() `M4;aN
}; uzZ|w+3O
BD=;4SLT
public static String toString(int algorithm){ :":W(O
return name[algorithm-1]; Z#>k:v
} 4_t aCK
m^T$H_*;
public static void sort(int[] data, int algorithm) { |ki#MtCp
impl[algorithm-1].sort(data); FPFt3XL
} pPh_p@3I
IO>Cyo
public static interface Sort { +#Ov9b
public void sort(int[] data); 7\a(Imq
} |EU}&k2
W .Hv2r3
public static void swap(int[] data, int i, int j) { ^n]tf9{I
int temp = data; qg.[M*
data = data[j]; _E'M(.B<
data[j] = temp; oi"Bf7{
} do=VPqy
} (eO0Ic[c