[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; D.7,xgH
} K)-Gv|*t
int i1=l; [^N8v;O
int i2=mid+1; 4Cd#S9<ed
for(int cur=l;cur<=r;cur++){ +f5|qbX/\
if(i1==mid+1) \R!.VL3Tx$
data[cur]=temp[i2++]; GUX!kj
else if(i2>r) Gp 8%n
data[cur]=temp[i1++]; $O\I9CGr$
else if(temp[i1] data[cur]=temp[i1++]; >Xz=E0;^Ua
else ? PIq/[tk
data[cur]=temp[i2++]; ~Te9Lq|
} WUC-*(
} `2WtA_
^Rel-=Z$B
} VV_Zrje
[G.4S5FX.]
改进后的归并排序: 0<g;g%
uj8G6'm%
package org.rut.util.algorithm.support; V)pn)no'V
#sHA!@ |
import org.rut.util.algorithm.SortUtil; m7~<z>5$
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/** |)%]MK$;
* @author treeroot /6?A#%hc
* @since 2006-2-2 4[\$3t.L
* @version 1.0 / 7i>0J]
*/ q,e{t#t
public class ImprovedMergeSort implements SortUtil.Sort { n jfh4}g:
y#Cp Vm#!>
private static final int THRESHOLD = 10; #F>7@N:5
]^f7s36
/* X jJV
* (non-Javadoc) tYe+7s
* Z`FEB0$
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) uq/z.m
*/ AD$$S.zoD<
public void sort(int[] data) { |3Fo4K%+
int[] temp=new int[data.length]; Mz?xvP?z
mergeSort(data,temp,0,data.length-1); VXE85
} \vH /bL
Gky e
private void mergeSort(int[] data, int[] temp, int l, int r) { R04%;p:k#
int i, j, k; k!&G;6O-
int mid = (l + r) / 2; |igr3p5Fw
if (l == r) PIZnzZ@Z;
return; "7]YvZYu0
if ((mid - l) >= THRESHOLD) >DFpL$oP
mergeSort(data, temp, l, mid); Lc&LF*
else nZ4JI+Q)~
insertSort(data, l, mid - l + 1); +%O_xqq
if ((r - mid) > THRESHOLD) P^lzl:|
mergeSort(data, temp, mid + 1, r); /mi9q
else \2UtT@3|C
insertSort(data, mid + 1, r - mid); SxX2+|0g`g
S.: m$s
for (i = l; i <= mid; i++) { U@;W^Mt
temp = data; gY\g+df-
} @yGK$<R
for (j = 1; j <= r - mid; j++) { AZj`o
temp[r - j + 1] = data[j + mid]; d9j+==S <
} J|O=w(
int a = temp[l]; )td?t.4
int b = temp[r]; |UudP?E
for (i = l, j = r, k = l; k <= r; k++) { $0kuR!U.N
if (a < b) { qdM=}lbc
data[k] = temp[i++]; gs xT
a = temp; .C6wsmQ
} else { @Cnn8Y&'
data[k] = temp[j--]; {OH @z!+d
b = temp[j]; !Q/%N#
} s8r|48I#;
} G{ |0}
} "e3T;M+
i 4}4U
/** WxLmzSz{xD
* @param data RJYB=y8l
* @param l P"Scs$NOU?
* @param i bNH72gX2Yh
*/ tom1u>1n
private void insertSort(int[] data, int start, int len) { P' ";L6h
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); @]{+9m8G@
} IIZu&iZo\
} wsfN \6e
} zL^`r)H
} Kyr3)1#J
O_E\(So
堆排序： 0xN1Xm0d
u{asKUce\
package org.rut.util.algorithm.support; 6\+ZTw
jD<fu
import org.rut.util.algorithm.SortUtil; M1Frn n
lc:dKGF6
/** ~x(1g;!^
* @author treeroot p aQ"[w
* @since 2006-2-2 b}f#[* Z
* @version 1.0 j O-H1@;
*/ J~e%EjN5e
public class HeapSort implements SortUtil.Sort{ T#o?@;
o+wG69
/* (non-Javadoc) '\,|B x8Q
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ?k 4|;DD
*/ Iu)76Y@=5=
public void sort(int[] data) { (G E)
MaxHeap h=new MaxHeap(); MV(Sb:RZ
h.init(data); fwN'5ep
for(int i=0;i h.remove(); 6Mh;ld@
System.arraycopy(h.queue,1,data,0,data.length); F2N)|C<
} sy\w ^]
wU"0@^k]<
private static class MaxHeap{ k2-:!IE
FFG/v`NM
void init(int[] data){ CnXl 7"
this.queue=new int[data.length+1]; ,/bSa/x`
for(int i=0;i queue[++size]=data; bG|aQ2HW
fixUp(size); odPdWV,&*
} &'mq).I2
} G*`H2-,
,Ky-3p>
private int size=0; bV3az/U
I7S#vIMXR.
private int[] queue; .5tE, (<?
YKWiZ
public int get() { #GlQwk3
return queue[1]; 5n1aRA1
} Qf'%".*=~8
<=yqV]JR
public void remove() { &az :YTq
SortUtil.swap(queue,1,size--); YF4?3K0F:k
fixDown(1); #s}cK
} {hNvCk
file://fixdown (C&Lpt_
private void fixDown(int k) { %XQ!>BeE
int j; d3IMQ_k
while ((j = k << 1) <= size) { NDqvt$
if (j < size %26amp;%26amp; queue[j] j++; C4].egVg
if (queue[k]>queue[j]) file://不用交换 "44A#0)B'l
break; NI%&Xhn!*>
SortUtil.swap(queue,j,k); Cj +{%^#
k = j; #+Pk_?
} O} &%R:
} eM) I%
private void fixUp(int k) { )tD[Ffvr
while (k > 1) { c1wP/?|.>
int j = k >> 1; FG6bKvEQm^
if (queue[j]>queue[k]) wuV*!oefo
break; MB"TwtW
SortUtil.swap(queue,j,k); }~akVh`3
k = j; h{5K9$9=
} Uc[@]
} 1FPt%{s3
C||9u}Q<
} Hf#VW^
6F)^8s02h
} $GI jWlAh
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SortUtil： GdlzpBl
h,palP6^
package org.rut.util.algorithm; O,c}T7A'?w
sx]kH$
import org.rut.util.algorithm.support.BubbleSort; ?nwFc3qw
import org.rut.util.algorithm.support.HeapSort; [#3*R_#8R
import org.rut.util.algorithm.support.ImprovedMergeSort; [2l2w[7Rid
import org.rut.util.algorithm.support.ImprovedQuickSort; <aPbKDF~V
import org.rut.util.algorithm.support.InsertSort; nRSiW*;R
import org.rut.util.algorithm.support.MergeSort; kLfk2A;'i
import org.rut.util.algorithm.support.QuickSort; Y+kfMAv
import org.rut.util.algorithm.support.SelectionSort; m) -DrbE
import org.rut.util.algorithm.support.ShellSort; 6 o!*bWh
' ~F
/** e{}oQK
* @author treeroot )<+t#5"
* @since 2006-2-2 d OYEl<!J
* @version 1.0 ->rr4xaKC
*/ t!285J8tn
public class SortUtil { kgZiyPcw
public final static int INSERT = 1; YPU*T&~
public final static int BUBBLE = 2; ox&PFI0Gn
public final static int SELECTION = 3; 4owM;y
public final static int SHELL = 4; #86=[*Dr
public final static int QUICK = 5; >Hd0l L
public final static int IMPROVED_QUICK = 6; >%?kp[
public final static int MERGE = 7; .:U`4->E
public final static int IMPROVED_MERGE = 8; -V_iv/fmM
public final static int HEAP = 9; s-[v[w'E
<=g{E-
public static void sort(int[] data) { |3:e$
sort(data, IMPROVED_QUICK); NU <K+k
} .IkQo`_s:
private static String[] name={ i*\\j1mf
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" d7 W[.M$]
}; vhz[H
_=Eb:n+X
private static Sort[] impl=new Sort[]{ ~0T;T
new InsertSort(), tF&g3)D:NV
new BubbleSort(), mV'XH
new SelectionSort(), Jjr&+Q^3Tu
new ShellSort(), v*[oe
new QuickSort(), KccIYn~
new ImprovedQuickSort(), i .GJO +K
new MergeSort(), 1I#]OY#>
new ImprovedMergeSort(), AW')*{/(Ii
new HeapSort() Fo:60)Lr
}; p\).zuEf.
`m_('N
public static String toString(int algorithm){ [(kC/W)!
return name[algorithm-1]; 9!u&8#i
} =K:)%Qh
a^5.gfzA
public static void sort(int[] data, int algorithm) { pG-9H3[f#
impl[algorithm-1].sort(data); B_3:.1>"BM
} .VG5 / 6zp
IJQ" *;
public static interface Sort { O+w82!<:
public void sort(int[] data); 5 >c,#*
} xJ(}?0h-X
X?gH(mn
public static void swap(int[] data, int i, int j) { ,VYUQE>\
int temp = data; ^Q9;ro*;ck
data = data[j]; ]K!NLvz
data[j] = temp; +!JTEKHKH
} O}Mu_edM
} 7mT iO?/y<