[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; ;!OME*?m<
} V#c=O}
int i1=l; 5bsv05=e
int i2=mid+1; i98PlAq)B
for(int cur=l;cur<=r;cur++){ Ct:c%D(L
if(i1==mid+1) Tz7R:S.
data[cur]=temp[i2++]; 1{ ehnH
else if(i2>r) g91xUG
data[cur]=temp[i1++]; ZS@R?
else if(temp[i1] data[cur]=temp[i1++]; I;9DG8C&v*
else JD AX^]
data[cur]=temp[i2++]; KqNsCT+j
} &yqk96z
} z^y -A?
GkKoc v
} FY]Et=p
L:jv%;DM
改进后的归并排序: 5RYrAzQo
1-R4A7+3
package org.rut.util.algorithm.support; Bma.Uln
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import org.rut.util.algorithm.SortUtil; E.^u:0:P
k\ZU%"^J
/** $]?M[sL\N7
* @author treeroot W=2]!%3#
* @since 2006-2-2 ;)sC{ "Jb
* @version 1.0 5 L-6@@/
*/ fvG4K(
public class ImprovedMergeSort implements SortUtil.Sort { nQn=zbZ3
qVds 2
private static final int THRESHOLD = 10; )Rj?\ZUR
'%a:L^a?
/* (D\`:1g
* (non-Javadoc) [&zSYmDk
* *P`k|-
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) t,kai6UM
*/ *O-m:M!eA
public void sort(int[] data) { yzXS{#\
int[] temp=new int[data.length]; fOk(ivYy
mergeSort(data,temp,0,data.length-1); |1T[P)Q
} `|:` yl
Su'l &]
private void mergeSort(int[] data, int[] temp, int l, int r) { =CaSd|
int i, j, k; B;Co`o2
int mid = (l + r) / 2; AQc9@3T~Bi
if (l == r) :r&4/sN}<
return; V<d`.9*}
if ((mid - l) >= THRESHOLD) qf%p#+:B3
mergeSort(data, temp, l, mid); +V#dJ[,8;.
else |lVi* 4za%
insertSort(data, l, mid - l + 1); vnX~OVz2
if ((r - mid) > THRESHOLD) 8=mx5Gwz-
mergeSort(data, temp, mid + 1, r); Nm3CeU
else \r&(l1R
insertSort(data, mid + 1, r - mid); Nxm '* -A
h6D1uM"o
for (i = l; i <= mid; i++) { *C^TCyBK;
temp = data; 6h\; U5
} sT91>'&
for (j = 1; j <= r - mid; j++) { 5J3K3
temp[r - j + 1] = data[j + mid]; YO;@Tj2)x
} gyCXv0*z
int a = temp[l]; `,FhCT5
int b = temp[r]; ''.\DC~K
for (i = l, j = r, k = l; k <= r; k++) { QVD^p;b
if (a < b) { %O>_$ 4q
data[k] = temp[i++]; Q?dzro4C
a = temp; "}<baz
} else { hTQ]xN)
data[k] = temp[j--]; B> zQ[e@t
b = temp[j]; |1/?>=dDm
} pAcu{5#7
} IZxr;\dq6
} _147d5
M+L0 X$}NZ
/** zBqNE`
* @param data t>"|~T$9
* @param l .kDJuJ^
* @param i qnw8#!%I
*/ (z%OK[
private void insertSort(int[] data, int start, int len) { Qs_]U
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); |PLWF[+t8
} "T6s;'k
} H(Ad"1~.#
} prVqV-S6TY
} `(@{t:L
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堆排序： z-`4DlJUS
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package org.rut.util.algorithm.support; DXfQy6k'
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import org.rut.util.algorithm.SortUtil; 2%j"E{J&
h ?+vH{}j
/** BNbz{tbX"
* @author treeroot 2O0</^Z%E
* @since 2006-2-2 (vbI4&r
* @version 1.0 Dfd%Z;Yu
*/ 4I;$a;R!
public class HeapSort implements SortUtil.Sort{ u:\DqdlU`
{uiL91j.
/* (non-Javadoc) v79\(BX
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) V"|j Dnn5
*/ v$R7"
public void sort(int[] data) { mB*;>
MaxHeap h=new MaxHeap(); d?=r:TBU
h.init(data); D(M^%z2N
for(int i=0;i h.remove(); 2B]mD-~
System.arraycopy(h.queue,1,data,0,data.length); +InFv"wt
} 4J2C#Cs
O4,?C)
private static class MaxHeap{ NQ\<~a`Eq
NKRH>2,
void init(int[] data){ $(pVE}J
this.queue=new int[data.length+1]; 6/L34VH
for(int i=0;i queue[++size]=data; <7J\8JR&=
fixUp(size); hu-6V="^9
} h) W|~y@
} lf2(h4[1R
h=ko_/<
private int size=0; ^1[u'DW4
6 kAXE\T
private int[] queue; s!/Q>A
P64<O5l/
public int get() { (Bu-o((N@0
return queue[1]; i8`0-
} stlkt>9
DX8pd5U
public void remove() { @%$<,$=
SortUtil.swap(queue,1,size--); XE :JL_
fixDown(1); +L#Q3}=s
} Bfr$&?j#
file://fixdown g}*F"k4j
private void fixDown(int k) { Z<$y)bf
int j; (hIy31Pf
while ((j = k << 1) <= size) { =7<g;u
if (j < size %26amp;%26amp; queue[j] j++; AJ85[~(lX
if (queue[k]>queue[j]) file://不用交换 LW+^m6O
break; ~.8p8\H
SortUtil.swap(queue,j,k); bF? {
k = j; O.OSLezTQ
} &e1(|qax
} R}\n@X*
private void fixUp(int k) { EB[B0e7}
while (k > 1) { xX{gm'3UYa
int j = k >> 1; P}mn2Hs
if (queue[j]>queue[k]) N(L?F):fT
break; ?h'd\.j{
SortUtil.swap(queue,j,k); FFID<Lf/2
k = j; ?-9It|R
} 0o-KjX?kP
} qX!P:M
.06[*S
} w:o,mzuXK
vrvOPLiQ
} f;%\4TH?
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SortUtil： @(LEuYq}
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package org.rut.util.algorithm; 5j-?Uf
OqA#4h4^
import org.rut.util.algorithm.support.BubbleSort; OG}m+K&<
import org.rut.util.algorithm.support.HeapSort; p*"H&xA@
import org.rut.util.algorithm.support.ImprovedMergeSort; E=8$*YUW(g
import org.rut.util.algorithm.support.ImprovedQuickSort; [78^:q-/0
import org.rut.util.algorithm.support.InsertSort; uOprA`3
import org.rut.util.algorithm.support.MergeSort; j43-YdCJ
import org.rut.util.algorithm.support.QuickSort; @j?)uJ0Q
import org.rut.util.algorithm.support.SelectionSort; o"@GYc["
import org.rut.util.algorithm.support.ShellSort; t5jZ8&M5]
fkK42*U@r
/** \Dr?}D
* @author treeroot ".T&nS[z
* @since 2006-2-2 YCEdt>5PA
* @version 1.0 <GRrw
*/ p1(<F_Kta
public class SortUtil { rP7f~"L
public final static int INSERT = 1; @b"J FB|
public final static int BUBBLE = 2; %oqC5O6
public final static int SELECTION = 3; 6$*ZH*
public final static int SHELL = 4; w-9fskd6e
public final static int QUICK = 5; or]kXefG3
public final static int IMPROVED_QUICK = 6; [DO UIR9
public final static int MERGE = 7; 7>>6c7e
public final static int IMPROVED_MERGE = 8; dUL3UY3
public final static int HEAP = 9; DZ~qk+,I
V50FX}i
public static void sort(int[] data) { e|jmOYWG
sort(data, IMPROVED_QUICK); V?"SrXN>
} "OO"Ab{t
private static String[] name={ l9Sx'<
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" $M 1/74
}; *FrlzIAom
yCT:U&8%F
private static Sort[] impl=new Sort[]{ 6`Af2Y_
new InsertSort(), [<p7'n3x
new BubbleSort(), DKxzk~sOM
new SelectionSort(), XKt">W
new ShellSort(), tW|K\NL
new QuickSort(), 9>na3ISh
new ImprovedQuickSort(), +Pm yFJH
new MergeSort(), \5s#9
new ImprovedMergeSort(), KZ;Q71
new HeapSort() ]K(>r#'nH
}; }D>nXhO&
@,{', =L6
public static String toString(int algorithm){ bI?YNt,
return name[algorithm-1]; 4tv}V:EO
} vPA {)l\K
llP 5
public static void sort(int[] data, int algorithm) { JD}"_,-
impl[algorithm-1].sort(data); l.Qv9Ll|b
} %d/Pc4gfc
A$]&j5nh|
public static interface Sort { \$] V#@F
public void sort(int[] data); ow{SsX
} k{q4Zz[
<i(<|/$
public static void swap(int[] data, int i, int j) { ` kG}NJf
int temp = data; {Ex*8sU%p%
data = data[j]; %t:pG}A>:C
data[j] = temp; \KJ\>2Y
} x{';0MkUV
} -1 Ok_h"