[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; $$\| 3rj!
} 0;e>kz3o
int i1=l; xYRL4
int i2=mid+1; LL-MZ~ZB
for(int cur=l;cur<=r;cur++){ SR~~rD|V
if(i1==mid+1) hvGb9
data[cur]=temp[i2++]; sl%B-;@I
else if(i2>r) \C*?a0!:Z}
data[cur]=temp[i1++]; ~9]tt\jN*Y
else if(temp[i1] data[cur]=temp[i1++]; l4u`R(!n5
else &cDnZ3Q;
data[cur]=temp[i2++]; pz?.(AmU\
} sJ?Fque
} Oa7`Y`6
L4SFu.J'
} 2NsI3M4$8
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改进后的归并排序: Old5E&
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package org.rut.util.algorithm.support; \0j|~/6
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import org.rut.util.algorithm.SortUtil; vyqlP;K
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/** BWL~)Hx
* @author treeroot qVJV9n
* @since 2006-2-2 IcPIOCmOc
* @version 1.0 $9*Xfb/
*/ :!3CoC.X|c
public class ImprovedMergeSort implements SortUtil.Sort { u&bo32fc
3,tKqR7g
private static final int THRESHOLD = 10; ]=q?=%H
|...T 4:^Y
/* e|AJxn]
* (non-Javadoc) HnioB=fc
* O|%><I?I
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) fVo)# Bj
*/ }RDhI1x[mk
public void sort(int[] data) { 6P?
int[] temp=new int[data.length]; `6lc]r
mergeSort(data,temp,0,data.length-1); Uh?SDay
} T -C2V$1
y| @[?B
private void mergeSort(int[] data, int[] temp, int l, int r) { J9I!d.U
int i, j, k; Gt\F),@
int mid = (l + r) / 2; Lc+wS@
if (l == r) K-k;`s#
return; 4\ H;A
if ((mid - l) >= THRESHOLD) "+&|$*
mergeSort(data, temp, l, mid); +UHf&i/3
else ~2V|]Y;s
insertSort(data, l, mid - l + 1); Sxjwqqv
if ((r - mid) > THRESHOLD) 7qgHH p
mergeSort(data, temp, mid + 1, r); $0D]d.w=
else k=w%oqpN
insertSort(data, mid + 1, r - mid); uQ9P6w=Nt
|CY.Y,
for (i = l; i <= mid; i++) { ph%/;?wY
temp = data; /jeurCQ8#u
} ?8b?{`@V
for (j = 1; j <= r - mid; j++) { `dn|nI2
temp[r - j + 1] = data[j + mid]; n/S1Hae`
} hUB_[#8#
int a = temp[l]; =<iK3bPkU
int b = temp[r]; ?o),F^ir
for (i = l, j = r, k = l; k <= r; k++) { 0j7\.aaK
if (a < b) { :s$ rD
data[k] = temp[i++]; %@kmuz??
a = temp; V8`t7[r
} else { MPT*[&\-
data[k] = temp[j--]; 2m[z4V@`
b = temp[j]; & 2>W=h
} +<|6y46
} z[}[:H8
} =+'4u
rC[*x}
/** g15e|y)th
* @param data j5G8IP_Wx
* @param l `kVy1WiY
* @param i m+"?;;s
*/ L@t<%fy@
private void insertSort(int[] data, int start, int len) { K.",=\53
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); HPg@yx"U
} 80&JEtRh
} %W+*)u72(
} !d&K,k
} GO+cCNMa"
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堆排序： EUu"H` E+
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package org.rut.util.algorithm.support; M@E*_U!U
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import org.rut.util.algorithm.SortUtil; |94"bDL3~
$cSrT)u:
/** # 0dN!l;
* @author treeroot bQrH8)
* @since 2006-2-2 ]j~V01p/e
* @version 1.0 5|9,S
*/ SLD%8:Zn
public class HeapSort implements SortUtil.Sort{ b{b2L.
O!\P]W4r$
/* (non-Javadoc) 25::z9i
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) tl (2=\
*/ KArR.o }
public void sort(int[] data) { _K_!(]t
MaxHeap h=new MaxHeap(); QDF1$,s4i
h.init(data); (UAa
for(int i=0;i h.remove(); i"r&CS)sT
System.arraycopy(h.queue,1,data,0,data.length); cX> a>U
} |Eu_K`
bT|a]b:
private static class MaxHeap{ /![S 3Ol
[YpSmEn}Y
void init(int[] data){ ?76Wg::
this.queue=new int[data.length+1]; 0gL]^_+7
for(int i=0;i queue[++size]=data; x$[<<@F%
fixUp(size); z+@aQ@75
} \&NpVH,-
} \rF6"24t6
N)RyRR.x1.
private int size=0; F@& R"-
p&>*bF,
private int[] queue; \A6MVMF8
q?nXhUD
public int get() { o )G'._
return queue[1]; kn^RS1m
} t>)iC)^u
TUw^KSa
public void remove() { u}\F9~W-{
SortUtil.swap(queue,1,size--); }/nbv;)
fixDown(1); X};m\Bz
} me_DONW
file://fixdown =!w5%|r.
private void fixDown(int k) { v~H1Il_+
int j; mSp-
while ((j = k << 1) <= size) { *`mPPts}
if (j < size %26amp;%26amp; queue[j] j++; zH0%; o}
if (queue[k]>queue[j]) file://不用交换 yM}}mypS
break; $3[IlQ?
SortUtil.swap(queue,j,k); WS/^WxRY
k = j; *p`0dvXG2
} +iz5%Qe<f
} 5Q#;4
private void fixUp(int k) { Kfa7}f_
while (k > 1) { Wb+^Ue
int j = k >> 1; y>Zvose
if (queue[j]>queue[k]) e6z;;C@'G
break; lM86 *g 'l
SortUtil.swap(queue,j,k); K_{f6c<
k = j; 4v_?i@,L
} jL(=<R(~y
} -wH#B<'
}fpK{db
} %6+J]U
orVsMT[A
} b'Pq[ )
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SortUtil： Q&] }`Rp=
H%t/-'U?
package org.rut.util.algorithm; O$k;p<?M
7!+kyA\}r^
import org.rut.util.algorithm.support.BubbleSort; jJkM:iR
import org.rut.util.algorithm.support.HeapSort; D9zw' RY
import org.rut.util.algorithm.support.ImprovedMergeSort; rlT[tOVAY
import org.rut.util.algorithm.support.ImprovedQuickSort; XSyCT0f08
import org.rut.util.algorithm.support.InsertSort; lhw]?\
import org.rut.util.algorithm.support.MergeSort; Fq!12/Nn
import org.rut.util.algorithm.support.QuickSort; F1JSf&8
import org.rut.util.algorithm.support.SelectionSort; %Koc^ pb)
import org.rut.util.algorithm.support.ShellSort; 4:q<<vCJv
kMWu%,s4
/** 3UU]w`At
* @author treeroot o,[~7N
* @since 2006-2-2 #H{<nVvg^
* @version 1.0 2.ud P
*/ a% |[m,FvP
public class SortUtil { '@>FtF[Gu
public final static int INSERT = 1; ;ZHKTOoK
public final static int BUBBLE = 2; "D}PbT[V
public final static int SELECTION = 3; a\S"d
public final static int SHELL = 4; ]:i :QiYD
public final static int QUICK = 5; i>HipD,TD
public final static int IMPROVED_QUICK = 6; C7[ge&
public final static int MERGE = 7; jCDZ$W89
public final static int IMPROVED_MERGE = 8; MH[Zw$
public final static int HEAP = 9; C9E l {f
)A:2y +
public static void sort(int[] data) { 5 WSu
sort(data, IMPROVED_QUICK); /ZqBO*]
} zWoPa,
private static String[] name={ [_hHZMTH
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" @qmONQ eb
}; 9r-]@6;
TC[_Ip&
private static Sort[] impl=new Sort[]{ lTJ1]7)
new InsertSort(), o90SXa&l/
new BubbleSort(), ePdM9%
new SelectionSort(), F@Y)yi?z
new ShellSort(), W6ZXb_X
new QuickSort(), "~Twx]Z
new ImprovedQuickSort(), jY EB`&
new MergeSort(), DnvJx!#R
new ImprovedMergeSort(), DE|r~TQ
new HeapSort() |};]^5s9
}; @P#uH5U
%ANo^~8
public static String toString(int algorithm){ .yE!,^j.gB
return name[algorithm-1]; AN7WMX
} V#.;OtF]
'c<vj jIg
public static void sort(int[] data, int algorithm) { /%C6e )7BL
impl[algorithm-1].sort(data); _+g5;S5
} "'h?O*V]u{
b/Y9fQn
public static interface Sort { :-ZE~bHJ
public void sort(int[] data); 0JQy-hpF
} `<kHNcm
WJ=DTON
public static void swap(int[] data, int i, int j) { &I:[ 'l!
int temp = data; /tl/%:U*.
data = data[j]; 1RM;"b/
data[j] = temp; s,m+q)
} Yq}7x1mm
} [H;HrwM s)