[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; N6>(;ugJ1-
} f) znTJL
int i1=l; "*($cQ$v
int i2=mid+1; )n+Lo&C<
for(int cur=l;cur<=r;cur++){ wy yWyf
if(i1==mid+1) |P[w==AAf
data[cur]=temp[i2++]; ,eOB(?Ku
else if(i2>r) C+'/>=>a.
data[cur]=temp[i1++]; vo`2\R.
else if(temp[i1] data[cur]=temp[i1++]; 05z,b]>l
else uPhK3nCGo
data[cur]=temp[i2++]; t,,k
} io _1Y]N
} -!q:p&c
x8wD0D
} V\{clJ\U
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改进后的归并排序: 'U1R\86M
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package org.rut.util.algorithm.support; _/F7?^j
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import org.rut.util.algorithm.SortUtil; %Qc La//
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/** >v:y?A,
* @author treeroot 5Ec6),+&
* @since 2006-2-2 {F3xJ[
* @version 1.0 (gy#js#
*/ &{ay=Mj
public class ImprovedMergeSort implements SortUtil.Sort { 0":ib0=
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private static final int THRESHOLD = 10; z,Medw6[
@GkILFN
/* u&`XB|~
* (non-Javadoc) >CrA;\l
* d_CKP"TA
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) <%($7VMev
*/ o4j[p3$
public void sort(int[] data) { .JYaH?
int[] temp=new int[data.length]; Q(lo{AFc
mergeSort(data,temp,0,data.length-1); K&bzDzd`
} 4NGA/ G
L_vISy%\b
private void mergeSort(int[] data, int[] temp, int l, int r) { U[SaY0Z
int i, j, k; I`p+Qt
int mid = (l + r) / 2; wN`jE0 {
if (l == r) ^?U!pq-`
return; q ]M+/sl
if ((mid - l) >= THRESHOLD) 61.Brp.eP
mergeSort(data, temp, l, mid); J!0DR4=Xi
else !6BW@GeF]
insertSort(data, l, mid - l + 1); :ZTc7}
if ((r - mid) > THRESHOLD) g,}_G3[j0m
mergeSort(data, temp, mid + 1, r); ^oVs+vC
else |s"nM<ZNZ
insertSort(data, mid + 1, r - mid); Nd`%5%'::
!;0U,!WI
for (i = l; i <= mid; i++) { 9 TvV=
temp = data; -}=i 04^
} ,u!*2cWN
for (j = 1; j <= r - mid; j++) { G;&-\0>W
temp[r - j + 1] = data[j + mid]; 1KMLG=
} y<HO:kZ8`
int a = temp[l]; W{%TlN
int b = temp[r]; K&nE_.kbl
for (i = l, j = r, k = l; k <= r; k++) { v 0 }@
if (a < b) { n1JRDw"e$$
data[k] = temp[i++]; hn^<;av=
a = temp; sp#p8@Cj
} else { /]=C{)8
data[k] = temp[j--]; wp#'nO
b = temp[j]; 9S-Z&2L
} PUF/#ck
} _&N2'hG=sn
} TcIcS]w%
=4[v3Qx
/** \n{qsf:
* @param data {. 2k6_1[
* @param l :E_g"_
* @param i z*kutZ:6Y
*/ MNC*Glj=
private void insertSort(int[] data, int start, int len) { CsTF
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 9;_sC
} 1nQWW9i
} b?TO=~k,
} ?3*l{[@J
} z54EG:x.7^
2@9Tfm(=
堆排序： ^.#jF#u~
vV[eWd.o6M
package org.rut.util.algorithm.support; *RXbc~ H
L!rw[x
import org.rut.util.algorithm.SortUtil; 9{-EJ)
vWRju*Z&
/** WKT4D}{1
* @author treeroot `wus\&!W
* @since 2006-2-2 3D`YZ#M
* @version 1.0 l%?T2Fm3>
*/ 3|1ilP
public class HeapSort implements SortUtil.Sort{ w9NHk~LHKF
ux_Mrh'
/* (non-Javadoc) ?**+e%$$
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) eln&]d;
*/ 7]9 a<
public void sort(int[] data) { ]<H&+ &!
MaxHeap h=new MaxHeap(); IqC]!H0
h.init(data); }D7I3]2>
for(int i=0;i h.remove(); b+@JY2dvj
System.arraycopy(h.queue,1,data,0,data.length); 0|$v-`P$
} CPP` qt%f
%K\?E98M
private static class MaxHeap{ R(2tlZ
Cz72?[6
void init(int[] data){ !OBEM1~ 1
this.queue=new int[data.length+1]; q0$ !y!~
for(int i=0;i queue[++size]=data; (>VX-Y/
fixUp(size); u#Z#)3P
} wW#}:59}
} )+}]+xRWGj
ROk5]b.
private int size=0; O) WCW<p
XLAN Np%E
private int[] queue; FP;Ccl"s
@r#v[I
public int get() { ;\lW5ZX
return queue[1]; et,f_fd7v
} 4zJtOK?r"
wtc!>
public void remove() { r9 ui|>U"
SortUtil.swap(queue,1,size--); 3E>frR\!I
fixDown(1); !R1.7}O
} !eEHmRgg4
file://fixdown |`lzfe
private void fixDown(int k) { 3=Cc.a/3
int j; oXxCXO,q
while ((j = k << 1) <= size) { &e;=cAXG
if (j < size %26amp;%26amp; queue[j] j++; F{eU";D
if (queue[k]>queue[j]) file://不用交换 }RHn)}+
break; LUC4=kk4
SortUtil.swap(queue,j,k); ^j".
k = j; o'W5|Gy
} QAvir%Y9Q
} ]@uE#a:[
private void fixUp(int k) { &jsVw)Ue
while (k > 1) { 7PANtCFb&
int j = k >> 1; 4g :>[q
if (queue[j]>queue[k]) GlbySD@
break; dHK`eS$sb
SortUtil.swap(queue,j,k); wvbPnf^y
k = j; FI3)i>CnW
} 4$*%gL;f^
} zgs(Dt;
/%&2HDA)
} %n hm
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} n@U n
f}1&HI8r
SortUtil： (*oL+ef-C
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package org.rut.util.algorithm; &_"]5/"(
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import org.rut.util.algorithm.support.BubbleSort; Dh5X/y
import org.rut.util.algorithm.support.HeapSort; H63,bNS s
import org.rut.util.algorithm.support.ImprovedMergeSort; _T2=J+"-Kp
import org.rut.util.algorithm.support.ImprovedQuickSort; )('%R|$ /
import org.rut.util.algorithm.support.InsertSort; Gm(b/qDDe
import org.rut.util.algorithm.support.MergeSort; d4nH_?
import org.rut.util.algorithm.support.QuickSort; L ]w/P|
import org.rut.util.algorithm.support.SelectionSort; GDD '[;
import org.rut.util.algorithm.support.ShellSort; );Z1a&K5k
9A,^c;
/** czm&~n6$
* @author treeroot <L`"!~Q
* @since 2006-2-2 7.Z@Wr?
* @version 1.0 B<~ NS)w
*/ (;q\}u
public class SortUtil { cG?cUw).E
public final static int INSERT = 1; n84GZ5O>7
public final static int BUBBLE = 2; |fSe>uVZ
public final static int SELECTION = 3; U7I qST
public final static int SHELL = 4; Kt"BE j
public final static int QUICK = 5; k'#(1(xj
public final static int IMPROVED_QUICK = 6; ;gs ^%z
public final static int MERGE = 7; 6S+U&Ce\
public final static int IMPROVED_MERGE = 8; ]p;FZ4-T
public final static int HEAP = 9; tkXEHsRT
;$a@J&
public static void sort(int[] data) { '1$!jmY
sort(data, IMPROVED_QUICK); q*2N{
} RTv qls
private static String[] name={ lWqrU1Sjl
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" # g_Bx
}; #/I[Jqf
]|sAK%/
private static Sort[] impl=new Sort[]{ nv0]05.4
new InsertSort(), t`+'r}=d
new BubbleSort(), h}]fnA
new SelectionSort(), K^B%/T]d
new ShellSort(), J,zO2572u
new QuickSort(), 4"xPr[=iG
new ImprovedQuickSort(), v76D3'8
new MergeSort(), WHlYo5?
new ImprovedMergeSort(), gS:A'@&
new HeapSort() Oi:<~E[kz.
}; ?c7*_<W5
Ur5FC r
public static String toString(int algorithm){ +QE^\a
return name[algorithm-1]; 1.gG^$Jd
} +3&zN(
qA!]E^0*Ke
public static void sort(int[] data, int algorithm) { ei6AV1| p
impl[algorithm-1].sort(data); MW PvR|Q
} T}4/0yR2
F35#dIs`&
public static interface Sort { 2^)1N>"g
public void sort(int[] data); bzvh%RsW
} .VkbYK
'w14sr%
public static void swap(int[] data, int i, int j) { 1*dRK6
int temp = data; 7{xh8#m
data = data[j]; #?XQ7Im
data[j] = temp; l2&`J_"
} #hlCs
} ^k Cn*&