[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; 7Jm9,4]
} 8W"~>7/>D
int i1=l; eS jXaZh
int i2=mid+1; 5sq#bvfJ o
for(int cur=l;cur<=r;cur++){ f13%[RA9N
if(i1==mid+1) d(L u|/~
data[cur]=temp[i2++]; *5#Y[c
else if(i2>r) ZIx,?E+eJ
data[cur]=temp[i1++]; l~M86 h
else if(temp[i1] data[cur]=temp[i1++]; vxo iPqo
else /*lSpsBn
data[cur]=temp[i2++]; h^5'i}@u
} Ui46p
} toEmIa~o6
*Gm%Dn
} `1KZ14K
f,Sybf/uHh
改进后的归并排序: xXu/CGzG
yl%F}kBR
package org.rut.util.algorithm.support; KutR l$,
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import org.rut.util.algorithm.SortUtil; W<3nF5!
Cj}1 )qWq
/** Dg@>d0FW
* @author treeroot !_cT_ WHty
* @since 2006-2-2 TUiXE~8=
* @version 1.0 (+9_nAgZ,
*/ R gEKs"e
public class ImprovedMergeSort implements SortUtil.Sort { oM$EQd`7
}9Z?UtS
private static final int THRESHOLD = 10; % j7lLSusX
v>$GVCY
/* EpCUL@+
* (non-Javadoc) Mnaoh:z
* SN'LUwaMp!
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 2`l$uEI3oJ
*/ l\*}
public void sort(int[] data) { 1HBch]J
int[] temp=new int[data.length]; '@Y@H,
mergeSort(data,temp,0,data.length-1); 5_nkN`x
} /cr.}D2O
JF_\A)<ki
private void mergeSort(int[] data, int[] temp, int l, int r) { Fp06a!7<
int i, j, k; >b |l6#%
int mid = (l + r) / 2; yKa}U!$
if (l == r) OXzJ%&h
return; Ni GK|Z
if ((mid - l) >= THRESHOLD) 1z$;>+g<
mergeSort(data, temp, l, mid); >0SF79-RE
else w'.ny<Pe
insertSort(data, l, mid - l + 1); Q4Q*5>
if ((r - mid) > THRESHOLD) 'j!7 O+7y
mergeSort(data, temp, mid + 1, r); 6pQ#Zg()vp
else t@!X1?`w
insertSort(data, mid + 1, r - mid); a)[XJLCQ
w-|i8%X
for (i = l; i <= mid; i++) { >)U 7$<&b
temp = data; DCmNxN
} NJ7N*
for (j = 1; j <= r - mid; j++) { ^gh/$my;
temp[r - j + 1] = data[j + mid]; 2[Q*?N
} wI}5[m
int a = temp[l]; >u~ [{(d ,
int b = temp[r]; >&aFSL,f
for (i = l, j = r, k = l; k <= r; k++) { rGRxofi.
if (a < b) { v)+wr[Qs
data[k] = temp[i++]; z(3mhMJY
a = temp; yGH'|`
} else { ZqkP# ]+Y'
data[k] = temp[j--]; JQE^ bcr
b = temp[j]; .7Ys@;>B
} @=b0>^\m
} Hv<%_t_/
} l8%x(N4
iH( K[F /
/** WUdKj
* @param data *6q8kQsz^1
* @param l \y: 0+s/
* @param i .F?yt5{5No
*/ `t:7&$>T
private void insertSort(int[] data, int start, int len) { T2}I,{U
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); <i~ ( 8F\
} <h U ZD;
} _$wWKJy9
} i?'HVx
} }!& w<wR
/^#k/z
堆排序： E[t\LTt*n
CjOaw$s
package org.rut.util.algorithm.support; B8|=P&L7N
o]}b#U8S
import org.rut.util.algorithm.SortUtil; pt(GpbtWK
zV4%F"-
/** [t<^WmgtxL
* @author treeroot 3>0/WbA:7E
* @since 2006-2-2 Q9 kKk
* @version 1.0 eP'e_E
*/ bI@+Or
public class HeapSort implements SortUtil.Sort{ ).N}x^
RXt`y62yK
/* (non-Javadoc) FD#?pVyPn^
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) v.cB3/$z
*/ y*\ M7}](
public void sort(int[] data) { A!<R?
MaxHeap h=new MaxHeap(); ZGzrh`j{-
h.init(data); _xAdvr' W
for(int i=0;i h.remove(); ^gH.5L0]gH
System.arraycopy(h.queue,1,data,0,data.length); M$%aX,nk'
} *0l^/jqn:
s3_i5,y
private static class MaxHeap{ !;'U5[}8
6VQ*z8wLw
void init(int[] data){ y$*Tbzp
this.queue=new int[data.length+1]; ;r- \h1iA'
for(int i=0;i queue[++size]=data; VV?+q)
fixUp(size); #g{ZfO[#
} uMPJ
} 5^GUuFt5m
*J8j_-i,R
private int size=0; \KLWOj%
k2<VUeW5
private int[] queue; )f(#Fn
-:a 9'dT
public int get() { iIcO_ZyA
return queue[1]; "]kaaF$U%
} V`S6cmwdc\
GZXUB0W\@)
public void remove() { l K}('7\
SortUtil.swap(queue,1,size--); L;fhJ~r
fixDown(1); D>?%p"e
} lp!@uoN^T
file://fixdown DD"]as"#
private void fixDown(int k) { <z%zzc1s
int j; "p#mNc
while ((j = k << 1) <= size) { hKQT,
if (j < size %26amp;%26amp; queue[j] j++; Z)62/`C)
if (queue[k]>queue[j]) file://不用交换 x?va26FV
break; bH3-#mw5w
SortUtil.swap(queue,j,k); ?%;7k'0"
k = j; %Ni)^
} i?qS8h{
} 9d#-;qV
private void fixUp(int k) { HR\yJt
while (k > 1) { < I8hy$+6
int j = k >> 1; {/XzIOO;b
if (queue[j]>queue[k]) p!|Wp
break; >Ah [uM
SortUtil.swap(queue,j,k); # T$^{/J
k = j; Ls5|4%+&
} 3PpycJ}
} -zN*2T
QI=",vmau
} SD8Q_[rY
V. =!^0'A
} ;[ pyKh
y''`73U"
SortUtil： "CT'^d+
$MfHA~^
package org.rut.util.algorithm; S,n*1&ogj
G9N6iKP!
import org.rut.util.algorithm.support.BubbleSort; Pqo"~&Y|~
import org.rut.util.algorithm.support.HeapSort; c:>&Bg&,6T
import org.rut.util.algorithm.support.ImprovedMergeSort; u~bk~3.I
import org.rut.util.algorithm.support.ImprovedQuickSort; lyF~E
import org.rut.util.algorithm.support.InsertSort; DN;g2R`f
import org.rut.util.algorithm.support.MergeSort; }/SbmW8(1
import org.rut.util.algorithm.support.QuickSort; a7%5Qg9B;
import org.rut.util.algorithm.support.SelectionSort; nP0|nPWz#
import org.rut.util.algorithm.support.ShellSort; O<Ht-TN&
ou6yi; l%
/** @4sv(HyDY
* @author treeroot (05/}PhB`
* @since 2006-2-2 s34{\/'D+
* @version 1.0 Gi6sl_"q
*/ h-<('w:A
public class SortUtil { 5^ARC^v
public final static int INSERT = 1; i`FevAx;[m
public final static int BUBBLE = 2; iNe;h|
public final static int SELECTION = 3; ^0pd- n@pn
public final static int SHELL = 4; VI74{='=
public final static int QUICK = 5; :JV=Kt
public final static int IMPROVED_QUICK = 6; Owo2DsT t
public final static int MERGE = 7; t*NZ@)>
public final static int IMPROVED_MERGE = 8; \WQ\q \
public final static int HEAP = 9; J)x-Yhe
4~P{H/]
public static void sort(int[] data) { A'c0zWV2
sort(data, IMPROVED_QUICK); _o'ii VDuD
} -,uTAk0+@
private static String[] name={ vYKKv%LE
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Urm&4&y
}; [v^T]L
CJz2.yd
private static Sort[] impl=new Sort[]{ =!GUQLS{
new InsertSort(), K;k_MA310
new BubbleSort(), /$|C s
new SelectionSort(), :p;!\4)u
new ShellSort(), Ew*_@hVC
new QuickSort(), ,5mK_iUw3
new ImprovedQuickSort(), Xjw>Qws
new MergeSort(), kl?U2A.=
new ImprovedMergeSort(), re2M!m6k5
new HeapSort() 4`I2tr
}; FDbb/6ku
|cEJRs@B
public static String toString(int algorithm){ ?w#V<3=
return name[algorithm-1]; ^vn8s~#
} yS[:C 2v
0BMKwZg
public static void sort(int[] data, int algorithm) { sX.L
impl[algorithm-1].sort(data); @i'RIL}
} Q})x4
Ynl^Z
public static interface Sort { !TA6-]1
public void sort(int[] data); (+`pEDD{X
} %YkJA:
{pH{SRM)B
public static void swap(int[] data, int i, int j) { mKugb_d?
int temp = data; b|^g51v
data = data[j]; umaF}}-Q{
data[j] = temp; Dq/_^a/1
} )a AKO`
} -*~= 4m<