[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; u, ff>/1
} s7<AfaJPF
int i1=l; #spCtZE
int i2=mid+1; >z03{=sAN
for(int cur=l;cur<=r;cur++){ ^~dWU>
if(i1==mid+1) qM`}{ /i
data[cur]=temp[i2++]; x:;kSh
else if(i2>r) Q8NX)R
data[cur]=temp[i1++]; QZs!{sZ
else if(temp[i1] data[cur]=temp[i1++]; 4Ig;3 ^%71
else Y73C5.dNcE
data[cur]=temp[i2++]; 0f/<7R
} s1rCpzK0
} pRqx`5 }
ixFi{_
} .8R@2c`}Cs
m*pJBZxd
改进后的归并排序: w(/S?d
AdEMa}u6
package org.rut.util.algorithm.support; 2iOV/=+
YVU7wW,1
import org.rut.util.algorithm.SortUtil; \G[$:nS
F847pyOJnf
/** ^#$n~]s
* @author treeroot Wri<h:1
* @since 2006-2-2 53D]3
* @version 1.0 A<{{iBEI`
*/ d~H`CrQE*
public class ImprovedMergeSort implements SortUtil.Sort { ?}0,o.
|N2#ItBbW
private static final int THRESHOLD = 10; %A`+WYeuX
t!XwW$@
/* KHme&yMq
* (non-Javadoc) ]`K2N
* vgPCQO([
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) sT)CxOV
*/ m@c)Xci
public void sort(int[] data) { 3$ pX
int[] temp=new int[data.length]; NOva'qk
mergeSort(data,temp,0,data.length-1); j_AACq {.
} UVP vOtZj
WE?5ehEme
private void mergeSort(int[] data, int[] temp, int l, int r) { ]/Pn EU[
int i, j, k; fex@,I&
int mid = (l + r) / 2; f8~_E
if (l == r) Tbq;h?D
return; <YY14p
if ((mid - l) >= THRESHOLD) >Ry01G]_/h
mergeSort(data, temp, l, mid); $mILoy B,
else !zo{tI19
insertSort(data, l, mid - l + 1); a9gLg &
if ((r - mid) > THRESHOLD) CrLrw T
mergeSort(data, temp, mid + 1, r); 3S{/>1Y
else ";F'~}bDA
insertSort(data, mid + 1, r - mid); i@yC-))bY
s_Sk0}e
for (i = l; i <= mid; i++) { ;TYBx24vD'
temp = data; K-4PI+qQ\
} _b 0&!l<
for (j = 1; j <= r - mid; j++) { n S=W1zf
temp[r - j + 1] = data[j + mid]; HfVZ~PP
} 1#x0q:6
int a = temp[l]; Da|z"I x
int b = temp[r]; mt .sucT
for (i = l, j = r, k = l; k <= r; k++) { qm}@!z^
if (a < b) { d0D]Q
data[k] = temp[i++]; ^!d3=}:0
a = temp; iTwm3V P
} else { ;pAK_>
data[k] = temp[j--]; GOPfXtkC
b = temp[j]; ;p//QJB9
} LoV<:|GTI
} jp,4h4C^)
} K0~rN.C!0
?4,T}@P
/** 1?}T=)3+$
* @param data DQ3<$0
* @param l dN q$}
* @param i h{Y",7]!
*/ D7Z /H'|
private void insertSort(int[] data, int start, int len) { gdc<ZYcM
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 7#Ft|5$~q
} tw;}jh
} 1Mzmg[L8
} 'L'R9&o<X
} f|5co>Hk
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堆排序： ?9/G[[(
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package org.rut.util.algorithm.support; dV_G1'
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import org.rut.util.algorithm.SortUtil; e6*8K@LHB
**%37
/** lxx2H1([
* @author treeroot RZLq]8pM
* @since 2006-2-2 3fj4%P"
* @version 1.0 MtdG>TzUn
*/ ^q5#ihM
public class HeapSort implements SortUtil.Sort{ ?s01@f#
Hl"N}
/* (non-Javadoc) #mdc[.
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) o!Zb0/AP)
*/ K+eM
public void sort(int[] data) { js(pC@<q5
MaxHeap h=new MaxHeap(); .('SW\u-
h.init(data); Z@HEj_n
for(int i=0;i h.remove(); ftb\0,-
System.arraycopy(h.queue,1,data,0,data.length); j#|ZP-=1_
} vh^VxS
q9"96({\@
private static class MaxHeap{ i1UsIT
zhQJy?>'m
void init(int[] data){ ="+#W6bZT
this.queue=new int[data.length+1]; (PLUFT
for(int i=0;i queue[++size]=data; m O_af
fixUp(size); cuX)8+
} !$JT e
} 6k%f
e~OpofJNb
private int size=0; 2y4bwi
*dQSw)R
private int[] queue; 5pX6t
i-1op> Y
public int get() { &C}*w2]0S
return queue[1]; =_CzH(=f#
} rq{$,/6.
}BEB1Q}L
public void remove() { )0`C@um
SortUtil.swap(queue,1,size--); 81F9uM0
fixDown(1); vM={V$D&
} e\rp)[>'
file://fixdown Rq-ZL{LR7
private void fixDown(int k) { -"x$ZnHU
int j; E.h*g8bXe
while ((j = k << 1) <= size) { 0GwR~Z}Z
if (j < size %26amp;%26amp; queue[j] j++; 5xiEPh
if (queue[k]>queue[j]) file://不用交换 ).O)p9
break; KNl$3nX
SortUtil.swap(queue,j,k); 0GLM(JmK
k = j; ~%oR[B7=|
} Eci\a]
} @7}W=HB
private void fixUp(int k) { >P(.:_^p
while (k > 1) { kh<2BOV
int j = k >> 1; F4QVAOM]U
if (queue[j]>queue[k]) :jf3HG
break; &{:-]g\
SortUtil.swap(queue,j,k); gXU8hTd8
k = j; u8^lB7!e/
} `[A];]
} *CMx-_
BT$_@%ea&
} t20K!}D_
TeQV?ZQ#}
} xdPx{"C 3
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SortUtil： P?<y%c<
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package org.rut.util.algorithm; _1^'(5f$
y_,bu^+*
import org.rut.util.algorithm.support.BubbleSort; YSMAd-Ef-
import org.rut.util.algorithm.support.HeapSort; [[ZJ]^n,
import org.rut.util.algorithm.support.ImprovedMergeSort; )7@0[>
import org.rut.util.algorithm.support.ImprovedQuickSort; )oZ dj`
import org.rut.util.algorithm.support.InsertSort; "@kaHIf[
import org.rut.util.algorithm.support.MergeSort; f$( e\++
import org.rut.util.algorithm.support.QuickSort; 3`HV(5U[
import org.rut.util.algorithm.support.SelectionSort; gw(z1L5 n
import org.rut.util.algorithm.support.ShellSort; K3C<{#r
<@}9Bid!o
/** al0L&z\
* @author treeroot jIyQ]:*p
* @since 2006-2-2 Kw}'W 8`c
* @version 1.0 nN;u,}e
*/ zs;JJk^
public class SortUtil { a*;b^Ze`v
public final static int INSERT = 1; (H]AR8%W
public final static int BUBBLE = 2; yZ:qU({KhD
public final static int SELECTION = 3; iso4]>LF
public final static int SHELL = 4; @HW*09TG
public final static int QUICK = 5; Efe 7gE'
public final static int IMPROVED_QUICK = 6; & kIFcd@
public final static int MERGE = 7; iLT}oKF2N;
public final static int IMPROVED_MERGE = 8; 9mgIUjz
public final static int HEAP = 9; ^Cmyx3O^
$>gFf}#C
public static void sort(int[] data) { H]s.=.Ki
sort(data, IMPROVED_QUICK); 6@o*xK7L
} POW>~Tof1
private static String[] name={ QJNFA}*>
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 0x7'^Z>-oe
}; $kgVa^
kza5ab
private static Sort[] impl=new Sort[]{ V]&\fk-{
new InsertSort(), R]dg_Da
new BubbleSort(), ^aQ"E9
new SelectionSort(), g}i61(
new ShellSort(), fM}#ON>Z
new QuickSort(), +p^u^a
new ImprovedQuickSort(), neh(<>
new MergeSort(), "b[5]Y{ U
new ImprovedMergeSort(), l, wp4Ll
new HeapSort() wBzC5T%,
}; ]9L oZ)
fVwUe _Y
public static String toString(int algorithm){ 'yth'[
return name[algorithm-1]; B *vM0
} .pq%?&
E4!Fupkpf
public static void sort(int[] data, int algorithm) { \jA~9
impl[algorithm-1].sort(data); +"(jjxJm
} !BI;C(,RL
#g=XUZ/"
public static interface Sort { V]N?6\Op
public void sort(int[] data); Qd6FH2Pl
} *VeRVaBl
5;S.H#YOpO
public static void swap(int[] data, int i, int j) { bcR_E5x$
int temp = data; % nIf)/2g
data = data[j]; AS,%RN^.
data[j] = temp; ;=@0'xPEa-
} -8Xf0_
} +#By*;BJ