[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; J5xZLv
} H"?Ndl:
int i1=l; 1/?K/gL
int i2=mid+1; %;aB#:p6
for(int cur=l;cur<=r;cur++){ WfTl\Dxw
if(i1==mid+1) ?_T[]I'
data[cur]=temp[i2++]; 8-@HzS%
else if(i2>r) K\mFb
data[cur]=temp[i1++]; e:T9f('
else if(temp[i1] data[cur]=temp[i1++]; .4<lw
else "/3YV%to-#
data[cur]=temp[i2++]; _({wJ$aYC
} nFn}
} 8cURYg6v
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改进后的归并排序: bPV;"
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package org.rut.util.algorithm.support; \pP1k.~UnC
nAX/u[
import org.rut.util.algorithm.SortUtil; f=7[GZoDn
152LdZevF
/** 3[ xHY@c
* @author treeroot !lM.1gTTC
* @since 2006-2-2 -*kZ2grLt
* @version 1.0 8~|v:qk
*/ J]Rh+@r.
public class ImprovedMergeSort implements SortUtil.Sort { -av=5hm
%:OX^^i;
private static final int THRESHOLD = 10; P5GV9SA
b%0@nu4
/* :z%Zur+n c
* (non-Javadoc) QcjsQTAbk
* 2~vvE
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) D'^UZZlI^I
*/ BQs\!~Ux2
public void sort(int[] data) { sN) xNz
int[] temp=new int[data.length]; $)KNpdXh
mergeSort(data,temp,0,data.length-1); $ % B
} m9\~dD
H;ujB \+
private void mergeSort(int[] data, int[] temp, int l, int r) { [/<kPi
int i, j, k; ,?+uQXfXR
int mid = (l + r) / 2; H wz$zF+R
if (l == r) 5@pLGMHT
return; jzwHb'4B3
if ((mid - l) >= THRESHOLD) NSq29#
mergeSort(data, temp, l, mid); vJsg6oH
else 64^l/D(
insertSort(data, l, mid - l + 1); pOj8-rr
if ((r - mid) > THRESHOLD) 5XuQQ!`
mergeSort(data, temp, mid + 1, r); \!%~(FM
else o"kL,&
insertSort(data, mid + 1, r - mid); {!!8 *ix
\6pQ&an
for (i = l; i <= mid; i++) { 0_=^#r4Mu
temp = data; Kk|)N3AV:
} zz8NBO
for (j = 1; j <= r - mid; j++) { (UTA3Db
temp[r - j + 1] = data[j + mid]; IYr}%:P)
} #vAqqAS`,
int a = temp[l]; - rI4_Dl
int b = temp[r]; 9! yDZ<s
for (i = l, j = r, k = l; k <= r; k++) { Q9Go}}n
if (a < b) { Ds{DVdqA$c
data[k] = temp[i++]; &vfeBth
a = temp; RcZ&/MY
} else { <oSx'_dc
data[k] = temp[j--]; zy|h1.gd
b = temp[j]; t@iw&>8z
} >LB*5
} oxJAI4{y 4
} 1bjWWNzQA
c_aj-`BKp
/** gf^y3F[\
* @param data PtGFLM9R
* @param l <S12=<c?'
* @param i 9S<V5$}
*/ JZJb&q){
private void insertSort(int[] data, int start, int len) { s%A?B8,
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); c<{~j~+
} ~ cI`$kJ
} OU*skc>
} R_vK^Da
} is^5TL%@
F|P?|
堆排序： CX; m8
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package org.rut.util.algorithm.support; P!{J28dj
+=*ND<$n/E
import org.rut.util.algorithm.SortUtil; QoMa+QTuc
O@skd2
/** 74hRG~
* @author treeroot pi/&WMZ<
* @since 2006-2-2 .g.glQ_~=
* @version 1.0 Vygh|UEo
*/ q77Iq0VR
public class HeapSort implements SortUtil.Sort{ Qz$Wp*
z$VVt?K
/* (non-Javadoc) [I[*?9}$"
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ^__P;Gr`
*/ Wxi;Tq9C@_
public void sort(int[] data) { 51ILR9 Bc_
MaxHeap h=new MaxHeap(); E_{P^7Z|Jg
h.init(data); }Q-Tw,j
for(int i=0;i h.remove(); GbvbGEG
System.arraycopy(h.queue,1,data,0,data.length); MYVb !
} 1\/~>
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private static class MaxHeap{ sBNqg~HwB?
_6]tbni?v
void init(int[] data){ ~$1g"jIw
this.queue=new int[data.length+1]; !.O;SG
for(int i=0;i queue[++size]=data; ft!D2M
fixUp(size); I}awembw g
} ?}C8_I|4~
} N_(-\\mq
tw] l
private int size=0; _9S"rH[
eGWwPSIp
private int[] queue; 52r\Q}v$
f^Q)lIv
public int get() { r_o\72
return queue[1]; gGs"i]c
} +Edq4QYwR
]=Wq&~
public void remove() { ?` 2z8uD/
SortUtil.swap(queue,1,size--); tNAmA
fixDown(1); vI(CX]o
} +77j2W_0
file://fixdown UAC"jy1D
private void fixDown(int k) { Seq ^o=
int j; mw83pU6
while ((j = k << 1) <= size) { xzf/W+.>.
if (j < size %26amp;%26amp; queue[j] j++; /8/N
if (queue[k]>queue[j]) file://不用交换 Yv[<c!\
break; LfvRH?<W
SortUtil.swap(queue,j,k); &b]_#c
k = j; cHnd gUW]
} uzS;&-nA
} /5?tXH"
private void fixUp(int k) { :GM3n$
while (k > 1) { 6-\M }xq?
int j = k >> 1; Q@Cy\l
if (queue[j]>queue[k]) ^[q/w<_j~
break; ?VyiR40-Cx
SortUtil.swap(queue,j,k); ^+Vf*YY 8
k = j; rt\.|Hr4s
} $Ut1vp1$
} 880T'5}S :
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} v\5`n@}4
gbu)bqu2x
} Qn@[{%),4
d;).| .}P
SortUtil： qh6Q#s>tH
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package org.rut.util.algorithm; zOis}$GR
\CYKj_c
import org.rut.util.algorithm.support.BubbleSort; Uf|@h
import org.rut.util.algorithm.support.HeapSort; 5zF$Q{3
import org.rut.util.algorithm.support.ImprovedMergeSort; , ksr%gR+
import org.rut.util.algorithm.support.ImprovedQuickSort; mwF{z.t"
import org.rut.util.algorithm.support.InsertSort; H)X&5E
import org.rut.util.algorithm.support.MergeSort; 7<LCX{Uw
import org.rut.util.algorithm.support.QuickSort; -e_pw,5c '
import org.rut.util.algorithm.support.SelectionSort; ?4_ME3$t
import org.rut.util.algorithm.support.ShellSort; <qBM+m$|)
O*>`md?MH
/** zuJ@@\75
* @author treeroot tSVS ogGd
* @since 2006-2-2 L$@qEsO
* @version 1.0 /'bX}H(dq
*/ ZSLvr-,D
public class SortUtil { pwA~?$B1
public final static int INSERT = 1; e1ExB#
public final static int BUBBLE = 2; :,.HJ[Vg&
public final static int SELECTION = 3; QvlVjDIy
public final static int SHELL = 4; ,2mq}u>WU
public final static int QUICK = 5; D=M'g}l
public final static int IMPROVED_QUICK = 6; (XV+aQ\A
public final static int MERGE = 7; oKPG0iM:
public final static int IMPROVED_MERGE = 8; MSe>1L2=
public final static int HEAP = 9; D4T(Dce
]<u%jTQREd
public static void sort(int[] data) { ~NIqO4 D
sort(data, IMPROVED_QUICK); 5dL!e<<
} +9.GNu
private static String[] name={ O:#/To'
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" k|cP]p4,
}; J$S*QCo
Sd\oL*lN
private static Sort[] impl=new Sort[]{ )!'7!" $
new InsertSort(), pbGv\SF
new BubbleSort(), 8o466m6/
new SelectionSort(), vtRz;~,Z
new ShellSort(), &Zo+F]3d
new QuickSort(), m" ]VQnQ
new ImprovedQuickSort(), 5L,q,kVS
new MergeSort(), dlMjy$/T
new ImprovedMergeSort(), Gyc_B
new HeapSort() CUj$ <ay=
}; 1|$J>
sRflabl *x
public static String toString(int algorithm){ 0RN7hpf&`
return name[algorithm-1]; }'h\;8y
} \+<=O`
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public static void sort(int[] data, int algorithm) { ~l*[=0}
impl[algorithm-1].sort(data); :e\M~n+y
} y_T%xWK5
2c3/iYCKP
public static interface Sort { qKs"L^b
public void sort(int[] data); X|y0pH:S
} e<"sZK
5Trc#i<\
public static void swap(int[] data, int i, int j) { . Fm| $x
int temp = data; jK2gc^"t
data = data[j]; 9 $zx<O
data[j] = temp; R[H#av
} 0kaMYV?
} 6.vwK3\>~