[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; H[%Fo
} .kM74X=S
int i1=l; Hk-)fl#dr
int i2=mid+1; (^g?/i1@d
for(int cur=l;cur<=r;cur++){ !x.^ya
if(i1==mid+1) 7p}G!]`
data[cur]=temp[i2++]; 3uwZ#
else if(i2>r) $1(u.Ud
data[cur]=temp[i1++]; tkdhT8_
else if(temp[i1] data[cur]=temp[i1++]; JbYv <
else [|{yr
data[cur]=temp[i2++]; d"78w-S
} Co8b0-Z
} 5| 2B@6-
zY8"\ZB
} r @~T}<I
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改进后的归并排序: o}5:vi]
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package org.rut.util.algorithm.support; $4kc i@.
XKp%7;
import org.rut.util.algorithm.SortUtil; yz-IZt(
k>{i_`*
/** uVqJl{e\
* @author treeroot ovCk:Vz
* @since 2006-2-2 bIizh8d?
* @version 1.0 > 3JU
*/ *Kt7"J
public class ImprovedMergeSort implements SortUtil.Sort { 1G|Q~%cv
XzQ=8r>l
private static final int THRESHOLD = 10; @.kv",[{[
Xj$J}A@
/* |aN0|O2
* (non-Javadoc) fDq, )~D
* fRT:@lV
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) bi!4I<E>k
*/ <Q=ES,M
public void sort(int[] data) { l3}n.ODA
int[] temp=new int[data.length]; \{da|n-
mergeSort(data,temp,0,data.length-1); P<kTjG
} ZP?k|sEH
nvD"_.KrJ
private void mergeSort(int[] data, int[] temp, int l, int r) { VO(Ck\i}
int i, j, k; ?w# >Cs(
int mid = (l + r) / 2; I(Nsm3L
if (l == r) lGPC)Hu{`
return; S^)r,cC
if ((mid - l) >= THRESHOLD) <E@7CG.=
mergeSort(data, temp, l, mid); GMU<$x8o
else *cp|lW!ag
insertSort(data, l, mid - l + 1); #2DH_P
if ((r - mid) > THRESHOLD) z/fRd6|[
mergeSort(data, temp, mid + 1, r); @.*[CC;&
else ~<, \=;b/
insertSort(data, mid + 1, r - mid); vFb{(gIJ
[CPZj*|b
for (i = l; i <= mid; i++) { }p t5.'l
temp = data; 8)rv.'A((E
} (Wq9YDD@
for (j = 1; j <= r - mid; j++) { |[K7oa~#
temp[r - j + 1] = data[j + mid]; K@n.$g
} NOx&`OU+
int a = temp[l]; /BT;Q)(&
int b = temp[r]; kRiWNEw
for (i = l, j = r, k = l; k <= r; k++) { }(E6:h;}~
if (a < b) { T<54qe4`p
data[k] = temp[i++]; a\}|ikiE
a = temp; e%bERds
} else { CR934TE+
data[k] = temp[j--]; (%#d._j>fZ
b = temp[j]; o9wg<LP
} RW(AjDM
} <O5;w
} $%r|V*5
6xL=JSi~
/** 0y;&L63>T
* @param data #j-,#P@
* @param l g#[9O'H
* @param i `8FC&%X_
*/ )SA$hwR
private void insertSort(int[] data, int start, int len) { qsvUJU
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 3jS=
} <Dm6CH
} 7v,>sX
} F5 LQgK-z
} iqy}|xAU
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堆排序： `zzX2R Je
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package org.rut.util.algorithm.support; #0`"gR#+
Qmn5umd=?\
import org.rut.util.algorithm.SortUtil; WP]<\_r2
HAO/r`7*
/** "rX=G=
* @author treeroot f{AgKW9"
* @since 2006-2-2 ,dVCbAS@
* @version 1.0 (la<X<w
*/ sx]?^KR:
public class HeapSort implements SortUtil.Sort{ uTl:u
C9=f=sGL
/* (non-Javadoc) J$e.$ah;
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) K,IOD t
*/ N7oMtlvL[w
public void sort(int[] data) { J~_p2TZJ\3
MaxHeap h=new MaxHeap(); J.<eX=<
h.init(data); p1?}"bHk
for(int i=0;i h.remove(); 3~cOQ%#]4
System.arraycopy(h.queue,1,data,0,data.length); A^K,[8VX
} M%B[>pONb7
l m
private static class MaxHeap{ e-e{-pB6
5)nv
void init(int[] data){ ]Rj"/(X,
this.queue=new int[data.length+1]; Q|ik\
for(int i=0;i queue[++size]=data; UkqLLzL
fixUp(size); 2#(7,o}Y5
} B8_l+dXO
} ;~1r{kXxA"
mKsj7
private int size=0; Ki=7nKs
q#p)E=$
private int[] queue; 5z]dA~;*2
'nT#3/rL
public int get() { o[v`Am?v
return queue[1]; .\d0lJSr
} |iwTzlt*#
g$ 2M|Q
public void remove() { 1)YFEU&]
SortUtil.swap(queue,1,size--); J:(Shd'4D
fixDown(1); 8^R>y
} 8m1zL[.8g
file://fixdown z=K5~nU
private void fixDown(int k) { i*^K)SI8
int j; RChY+3,L)
while ((j = k << 1) <= size) { zHdp'J"
if (j < size %26amp;%26amp; queue[j] j++; D46|)-
if (queue[k]>queue[j]) file://不用交换 d|o"QYX
break; H]-W$V
SortUtil.swap(queue,j,k); /7lkbL
k = j; iit`'}+U
} N)!v-z,k
} I!(yU
private void fixUp(int k) { ; zvnDox
while (k > 1) { /y!Vs`PZ!
int j = k >> 1; UpIf t=@P
if (queue[j]>queue[k]) u}:O[DG
break; XBY"7}
SortUtil.swap(queue,j,k); h7y*2:l6
k = j; YSwD#jO0
} =#^dG''*"
} k9n
\6'A^cE/PX
} ib&qH_r/
xaS
} v'>Yc#VJ
E, v1F!
SortUtil： l3afuD:
m[bu(qz
package org.rut.util.algorithm; V")Q4h{
F0JFx$AoD
import org.rut.util.algorithm.support.BubbleSort; |X.z|wKT6
import org.rut.util.algorithm.support.HeapSort; 62_$O"
import org.rut.util.algorithm.support.ImprovedMergeSort; B.G!7>=
import org.rut.util.algorithm.support.ImprovedQuickSort; 7wqwDE
import org.rut.util.algorithm.support.InsertSort; 7_3O]e[8
import org.rut.util.algorithm.support.MergeSort; "J.jmR;
import org.rut.util.algorithm.support.QuickSort; Tk!b`9
import org.rut.util.algorithm.support.SelectionSort; `o3d@Vc
import org.rut.util.algorithm.support.ShellSort; \k,bz0
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/** :3t])mL#
* @author treeroot h0eo:Ahi
* @since 2006-2-2 j41:]6
* @version 1.0 z K(5&u
*/ "EHc&,B`
public class SortUtil { kb:C>Y8!sC
public final static int INSERT = 1; bn`zI~WS
public final static int BUBBLE = 2; RnrM rOh
public final static int SELECTION = 3; j<KC$[Kt
public final static int SHELL = 4; I;v`o{
public final static int QUICK = 5; OZ" <V^"`
public final static int IMPROVED_QUICK = 6; L%0lX$2&\
public final static int MERGE = 7; OKqpc;y:D
public final static int IMPROVED_MERGE = 8; 0?7uqS#L
public final static int HEAP = 9; Vj]kJ,j\y
X^W> "q
public static void sort(int[] data) { 5oKc=iX_3
sort(data, IMPROVED_QUICK); II8nz[s
} 9y4rw]4zI
private static String[] name={ (=/F=,w
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" v wyDY%B"n
}; :=Q|gRTL*
+)@>60y
private static Sort[] impl=new Sort[]{ 9y5\4&v
new InsertSort(), p~.@8r(
new BubbleSort(), <e^/hR4O
new SelectionSort(), DPwSg\*)
new ShellSort(), #'8PFw\zw
new QuickSort(), SIlg
new ImprovedQuickSort(), BQU5[8l
new MergeSort(), "(NHA+s/
new ImprovedMergeSort(), -!0LIr:"
new HeapSort() vxeT[/6i
}; `Ek!;u>
r$F]e]Ic\
public static String toString(int algorithm){ p.9v<I%0
return name[algorithm-1]; y]l"u=$Tr{
} <J)A_Kx[57
2mUu3fZ
public static void sort(int[] data, int algorithm) { _}&]`,s>
impl[algorithm-1].sort(data); C6VoOT)\
} *r`Yz}
9^='&U9sr
public static interface Sort { Tv$7aVi!
public void sort(int[] data); 'oz={;
} YfPo"uxx
IR LPUP
public static void swap(int[] data, int i, int j) { E(tBN]W.
int temp = data; )sf~l6
data = data[j]; 'y?|shV{]
data[j] = temp; Uot-@|l
} Nd_@J&
} F[EblJ