[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; %?RX}37K
} Q*KEODR8\
int i1=l; VK?,8Y
int i2=mid+1; ,GR(y^S
for(int cur=l;cur<=r;cur++){ C=hE@
if(i1==mid+1) M:C*?;K:
data[cur]=temp[i2++]; @p`#y
else if(i2>r) [ 8v)\lu
data[cur]=temp[i1++]; -4hX-
else if(temp[i1] data[cur]=temp[i1++]; /"/$1F%{
else ]@WJ&e/'@
data[cur]=temp[i2++]; :5"|iRP'
} im1]:kr7
} I{1w8m4O6
g~Q#U;]
} pu`|HaQaE
O[`n{Vl/
改进后的归并排序: y f+/Kj< a
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package org.rut.util.algorithm.support; 9"<)DS
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import org.rut.util.algorithm.SortUtil; C{Npipd}v
tk, HvE
/** 0Y"==g+>f
* @author treeroot vEfX'gyk
* @since 2006-2-2 RHB>svT^K>
* @version 1.0 cQ+V4cW Z
*/ WJJ!NoP
public class ImprovedMergeSort implements SortUtil.Sort { b5H[~8mf
ICV67(Ui
private static final int THRESHOLD = 10; ZC0F:=/K
x$M[/ID0
/* d~[>%&
* (non-Javadoc) =ohdL_6
* 44_n5vp,T
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) M)3h 4yQ
*/ D;:lw]
public void sort(int[] data) { 5(U.<
int[] temp=new int[data.length]; \6@}HFH
mergeSort(data,temp,0,data.length-1); <cWo]T`X!
} '5[L []A
!^\|r<2M
private void mergeSort(int[] data, int[] temp, int l, int r) { 0>.'w\,87B
int i, j, k; )EcF[aO
int mid = (l + r) / 2; $'[( DwLS
if (l == r) ][_:{ N/
return; 9$d (`-&9p
if ((mid - l) >= THRESHOLD) L!e@T'
mergeSort(data, temp, l, mid); 78NAcP~6c
else w@oq.K
insertSort(data, l, mid - l + 1); VDQ&BmJE
if ((r - mid) > THRESHOLD) LU%g>?m.]
mergeSort(data, temp, mid + 1, r); `D GO~RMp9
else %*r Pd>*
insertSort(data, mid + 1, r - mid); Vuz!~kLYIn
8K1+ttjm
for (i = l; i <= mid; i++) { ZY][LU~l8
temp = data; 8I~H1
} R?]>8o,
for (j = 1; j <= r - mid; j++) { *W i(%
temp[r - j + 1] = data[j + mid]; eL-92]]e
} W6jB!W
int a = temp[l]; !0zM@p
int b = temp[r]; @zPWu}&m
for (i = l, j = r, k = l; k <= r; k++) { n287@Y4Ru
if (a < b) { &f!!UZMt)
data[k] = temp[i++]; ~[,E i k
a = temp; Ie+z"&0
} else { {~d4;ht1Y
data[k] = temp[j--]; bg 7b!t1F
b = temp[j]; 4I2ppz
} zM)o^Fn2
} vguqk!eo4
} |r3eq4$Am
,@>B#%Nz
/** !X#=Pt[,
* @param data U>:p`@
* @param l R4qS,2E
* @param i *9*I:Uh57
*/ B|!YGfL
private void insertSort(int[] data, int start, int len) { 47t^{WrT
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 9N-mIGJ
} LWIU7dw
} ]aaHb
} XFM6.ye
} C0kwI*)
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堆排序： =P2T&Gb
x#pTB.
package org.rut.util.algorithm.support; m4kmJaM
_u.l|yR
import org.rut.util.algorithm.SortUtil; cL`l1:j\}
\)LY_D:
/** iaPY>EP1
* @author treeroot 6idYz"P %
* @since 2006-2-2 NEK;'"~
* @version 1.0 v|n.AGn
*/ Zb}=?fcL;@
public class HeapSort implements SortUtil.Sort{ U[Z1@2zLx
#<l;YT8
/* (non-Javadoc) @n})oAC,
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) d)q{s(<;
*/ b}k`'++2,
public void sort(int[] data) { ?2.<y_1
MaxHeap h=new MaxHeap(); =k0l>)
h.init(data); +fKLCzj
for(int i=0;i h.remove(); o>j3<#?
System.arraycopy(h.queue,1,data,0,data.length); I,q3J1K
} -+c_TJ.dC
-vhgBru
private static class MaxHeap{ @0t,vye
JJ[J'xl@
void init(int[] data){ q}+9$v
this.queue=new int[data.length+1]; K _y;<a]
for(int i=0;i queue[++size]=data; [j:%O|h
fixUp(size); =SLJkw&w6
} *y.KD4@{
} q \0>SG
KS%xo6k.
private int size=0; Is%-r.i
'fZHtnmc0
private int[] queue; |-Y,:sY:
4xg%OH
public int get() { =Ermh7,
return queue[1]; x+^iEj`gk
} /SP^fB*y
dZ;csc@xv
public void remove() { 5a4;d+
SortUtil.swap(queue,1,size--); et)A$'Q
fixDown(1); C;STJrew
} `)K1[&
file://fixdown LVO`+:
private void fixDown(int k) { K{"(|~=U
int j; r=s2wjk
while ((j = k << 1) <= size) { |8V+(Vzl
if (j < size %26amp;%26amp; queue[j] j++; Qv[@ioc
if (queue[k]>queue[j]) file://不用交换 s{hJ"lv:
break; Z wIsEJz
SortUtil.swap(queue,j,k); 6XB9]it6
k = j; "EHwv2Hm>
} {6v+ Dz>
} !a4pKN`qLY
private void fixUp(int k) { d94Lc-kq^
while (k > 1) { 72luTR Q
int j = k >> 1; H?^Poe(=(
if (queue[j]>queue[k]) ,9
break; }J"}poB:
SortUtil.swap(queue,j,k); NcFHvK
k = j; m<TKy_C`
} x!gu&AA<*
} _f2(vWCW;J
Smg,1,=
} q=g;TAXZl
/R@eOl}D
} &o:wSe
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SortUtil： *7DQ#bD
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package org.rut.util.algorithm; .gx*gX1<
p\F*Y,4
import org.rut.util.algorithm.support.BubbleSort; iv:[]o
import org.rut.util.algorithm.support.HeapSort; B-'Xk{
import org.rut.util.algorithm.support.ImprovedMergeSort; (t fADaJM
import org.rut.util.algorithm.support.ImprovedQuickSort; -=2tKH`Q
import org.rut.util.algorithm.support.InsertSort; mI9~\k&9
import org.rut.util.algorithm.support.MergeSort; M>8#is(pV
import org.rut.util.algorithm.support.QuickSort; #t po@pJsE
import org.rut.util.algorithm.support.SelectionSort; VbJGyjx
import org.rut.util.algorithm.support.ShellSort; q9F(8-J
3S +.]v>
/** 7n}J}8Y*U2
* @author treeroot 2NqlE
* @since 2006-2-2 kf.w:X"i
* @version 1.0 S'vrO}yU
*/ ->$Do$
public class SortUtil { SUHyg/|F
public final static int INSERT = 1; gQ/-.1Pz$
public final static int BUBBLE = 2; q>o1kTI
public final static int SELECTION = 3; 1i^!A&
public final static int SHELL = 4; !fZ{=
public final static int QUICK = 5; XwE(&ZCf'b
public final static int IMPROVED_QUICK = 6; .@.O*n#K
public final static int MERGE = 7; >>FE?@
public final static int IMPROVED_MERGE = 8; Gpo(Zf?
public final static int HEAP = 9; $hn#T#J3
4*G#fW-
public static void sort(int[] data) { Mp}aJzmkB;
sort(data, IMPROVED_QUICK); j^mAJ5
} g]N!_Ib/!
private static String[] name={ Z2j M.[hq
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" [*]&U6\j
}; ?%{v1(
j[ kg9z
private static Sort[] impl=new Sort[]{ pa4zSl
new InsertSort(), Rs8^27
new BubbleSort(), gW$X8ECX
new SelectionSort(), `o)rAD^e
new ShellSort(), %N=-i]+Id
new QuickSort(), oj;Rh!O
new ImprovedQuickSort(), josc
new MergeSort(), MXq+aS{
new ImprovedMergeSort(), \l"1Io=
new HeapSort() 6;"jq92in*
}; R>BnUIu
-5\hZ!!J2
public static String toString(int algorithm){ ^fQ ]>/u
return name[algorithm-1]; q`{crY30
} AKzhal!
:Fm;0R@/k
public static void sort(int[] data, int algorithm) { N/4`afiV.
impl[algorithm-1].sort(data); )t0Y-),vA
} H?m9HBDpn
4&Y{kNF
public static interface Sort { OB.TAoH:
public void sort(int[] data); \U\ W Q
} 6f v{?0|
-M/DOTc
public static void swap(int[] data, int i, int j) { DW\';"
int temp = data; ~Uz,%zU#3
data = data[j]; ]O,;t>
data[j] = temp; ^M0e0
} EuOrwmdj
} xRuAt/aC