[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; :S2MS{>Mo
} eT?LMBn\
int i1=l; +t6m>IBu
int i2=mid+1; t,YAk ?}
for(int cur=l;cur<=r;cur++){ hY'%SV p
if(i1==mid+1) ;sJ2K"c
data[cur]=temp[i2++]; <C xet~x
else if(i2>r) &"0[7zgYQz
data[cur]=temp[i1++]; 'D{abm0
else if(temp[i1] data[cur]=temp[i1++]; Q)8t;Kx
else 7 4UE-H)
data[cur]=temp[i2++]; XcneH jpR
} );LwWKa
} PUArKBYM-
$cCB%}
} 3E9j%sYk
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改进后的归并排序: ;c}];ZU3G
vnpX-c
package org.rut.util.algorithm.support; ,iy
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import org.rut.util.algorithm.SortUtil; dy'?@Lj;
B&D z(Bs
/** jz0\F,s
* @author treeroot &Gl&m@-j
* @since 2006-2-2 C I0^eaFs
* @version 1.0 Czn7,KE8X
*/ 4v$AM8/o
public class ImprovedMergeSort implements SortUtil.Sort { i{0_}"B
#a:C=GV;4
private static final int THRESHOLD = 10; N<%,3W_-_
:Tl?yGF
/* {5`?0+
* (non-Javadoc) WdnP[x9
* @TDcj~oR?
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) eU0-_3gN_
*/ [5-5tipvWp
public void sort(int[] data) { yFqC-t-i
int[] temp=new int[data.length]; pj6Cvq4bD
mergeSort(data,temp,0,data.length-1); MIJ~j><L
} SqQB>;/p
zKr(Gt8
private void mergeSort(int[] data, int[] temp, int l, int r) { nm.d.A/]Z
int i, j, k; cx) EFy.
int mid = (l + r) / 2; }vIm C [
if (l == r) .}wir,
return; ]Re<7_xt
if ((mid - l) >= THRESHOLD) xOlkG*3c
mergeSort(data, temp, l, mid); g11K?3*%Q
else g(^l>niF:
insertSort(data, l, mid - l + 1); =\.|'
if ((r - mid) > THRESHOLD) w8Yff[o
mergeSort(data, temp, mid + 1, r); |Sq>uC)
else $G[##j2
insertSort(data, mid + 1, r - mid); b :00w["
JZ [&:
for (i = l; i <= mid; i++) { L`v,:#Y
temp = data; q)X&S*-<o~
} w93,N+es6
for (j = 1; j <= r - mid; j++) { *yx:nwmo
temp[r - j + 1] = data[j + mid]; FqfeH_-U
} l(W3|W#P
int a = temp[l]; G 2##M8:U0
int b = temp[r]; OJaU,vQ#
for (i = l, j = r, k = l; k <= r; k++) { Z"u/8
if (a < b) { $9/r*@bu8d
data[k] = temp[i++]; $}@ll^
a = temp; Yc}b&
} else { \T?O.
data[k] = temp[j--]; 9)qx0
b = temp[j]; V'B 6C#jT
} FgxQ}VvlH
} 0Qz \"gr
} v)06`G
U<x3=P
/** 3 0Z;}<)9
* @param data P%c<0y"O:>
* @param l 9^n ]qg^
* @param i pFh2@O
*/ D? ($R9t
private void insertSort(int[] data, int start, int len) { LCtm@oN
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Ue7~rPdlR
} SL*(ZEn"
} 4-MA!&
} eM}Xn^}
} WW.=>]7;
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堆排序： E+gUzz5
O;~1M3Ii
package org.rut.util.algorithm.support; 7K~=QEc
)u$A!+fo
import org.rut.util.algorithm.SortUtil; YG_3@`-<
YeQX13C"Z
/** :3k(=^%G!
* @author treeroot Q["}U7j
* @since 2006-2-2 R[b?kT-%
* @version 1.0 8miIlB
*/ +.=a R<Q
public class HeapSort implements SortUtil.Sort{ ]du pU"VV
*k/_p^
/* (non-Javadoc) B*{CcQ<5
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) vCJjZ%eO%D
*/ +#O?sI#
public void sort(int[] data) { &wJ"9pQ~6E
MaxHeap h=new MaxHeap(); B}vI<?c
h.init(data); rei<{woX
for(int i=0;i h.remove(); /2c?+04+
System.arraycopy(h.queue,1,data,0,data.length); vR-/c
} Gc>\L3u
u+*CpKR}
private static class MaxHeap{ o_cj-
5i0<BZDTef
void init(int[] data){ B!:(*lF
this.queue=new int[data.length+1]; _z_uz\#,
for(int i=0;i queue[++size]=data; wi!Ml4Sb
fixUp(size); {2,V3*NF
} LWY`J0/
} M/BBNT
O!a5
private int size=0; bz@4obRqf
%9IM|\ulp
private int[] queue; :U~[%]
{pVD`#Tl[
public int get() { *w!H -*`
return queue[1]; 9 eP @}C6
} +s`n]1HC
[hs{{II
public void remove() { rVkHo*Q
SortUtil.swap(queue,1,size--); UXd\Q''
fixDown(1); pJ{sBp_$
} _r&#Snp
file://fixdown @521zi
private void fixDown(int k) { zITXEorF!J
int j; qh=lF_%uj
while ((j = k << 1) <= size) { 9khD7v
if (j < size %26amp;%26amp; queue[j] j++; hNQ,U{`;^
if (queue[k]>queue[j]) file://不用交换 6,k}v:
break; !dZHG R
SortUtil.swap(queue,j,k); A w83@U
k = j; L|v1=qNH4
} En1pz\'
} zD?<m J`
private void fixUp(int k) { :z.<||T
while (k > 1) { JIK;/1
int j = k >> 1; &D/_@\ 0
if (queue[j]>queue[k]) yHCBf)N7\
break; 0%vXPlfnY
SortUtil.swap(queue,j,k); $"sf%{~
k = j; <jV_J+#
} KnlVZn[3t
} /<GygRs
qUCiB}
} GeE|&popO
k*M1m'1
} m|'TPy
p3X>
SortUtil： y>|7'M*+
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package org.rut.util.algorithm; [~ fJ/
vQztD_bX%
import org.rut.util.algorithm.support.BubbleSort; `6UW?1_Z5
import org.rut.util.algorithm.support.HeapSort; 9hcZbM]
import org.rut.util.algorithm.support.ImprovedMergeSort; uRJLSt9m
import org.rut.util.algorithm.support.ImprovedQuickSort; f ^z7K
import org.rut.util.algorithm.support.InsertSort; (ZDRjBth[
import org.rut.util.algorithm.support.MergeSort; ! XA07O[@
import org.rut.util.algorithm.support.QuickSort; e%"L79Of6)
import org.rut.util.algorithm.support.SelectionSort; ceAK;v o
import org.rut.util.algorithm.support.ShellSort; lv,<[Hw1
<jfi"SJu
/** u"tv6Qp
* @author treeroot A2]N :=
* @since 2006-2-2 "#(]{MY
* @version 1.0 IS"UBJ6p
*/ 7x`uGmp1
public class SortUtil { FD[*mCGZ
public final static int INSERT = 1; )'92{-A0
public final static int BUBBLE = 2; (eHvp
public final static int SELECTION = 3; <Cm:4)~
public final static int SHELL = 4; )t0t*xu#
public final static int QUICK = 5; IeE+h-3p
public final static int IMPROVED_QUICK = 6; eo"6 \3z
public final static int MERGE = 7; l1a=r:WhH
public final static int IMPROVED_MERGE = 8; .hnGHX
public final static int HEAP = 9; 8\/E/o3
^KmyB6Yg
public static void sort(int[] data) { BT>8
sort(data, IMPROVED_QUICK); Z3=t"
} ACc.&,!IZ
private static String[] name={ >AV?g8B;
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" -49OE*uF
}; _<&IpT{w+
KD=T04v
private static Sort[] impl=new Sort[]{ tvZpm@1
new InsertSort(), &!a[rvtZ+
new BubbleSort(), Jt@7y"<
new SelectionSort(), P6dIU/w
new ShellSort(), h$y1"!N(
new QuickSort(), (:-=XR9A`
new ImprovedQuickSort(), yin"+&<T
new MergeSort(), }B^KV#_{S
new ImprovedMergeSort(), L9&Z?$6J_p
new HeapSort() t: r
}; CZt)Q4
| \C{R
public static String toString(int algorithm){ -7>vh|3
return name[algorithm-1]; jmz, 1[
} ,@8>=rT
=2# C{u.
public static void sort(int[] data, int algorithm) { U5%EQc-"P
impl[algorithm-1].sort(data); lhKd<Y"
} 9["yL{IPe
:^%My]>T
public static interface Sort { Jcy
public void sort(int[] data); Jx(%t<2
} Q];+?Pu.
b>Iqk
public static void swap(int[] data, int i, int j) { 3;@t{rIin
int temp = data; rer=o S
data = data[j]; 77.5 _
data[j] = temp; FX4](oM
} RV.*_FG
} 52,pCyU