[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; bL5u;iy)
} {HFx+<JG
int i1=l; 1Vs>G
int i2=mid+1; 8d&%H,
for(int cur=l;cur<=r;cur++){ s@6Jz\<E
if(i1==mid+1) "/%o'Fq
data[cur]=temp[i2++]; 2WE01D9O
else if(i2>r) 1*.*\4xo
data[cur]=temp[i1++]; o/& IT(v
else if(temp[i1] data[cur]=temp[i1++]; Lb{.}
else m^w{:\p
data[cur]=temp[i2++]; NPDMv |4
} TIK'A<
} RYdI$&]
'X`W+=T$
} ]zn3nhBI
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改进后的归并排序: [2!C^\t
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package org.rut.util.algorithm.support; rbl^ aik
8\jsGN.$JZ
import org.rut.util.algorithm.SortUtil; &=XK:+
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/** <,X=M6$0n
* @author treeroot }y vH)q
* @since 2006-2-2 I+31:#d
* @version 1.0 7m}fVLk
*/ }'K-1:
public class ImprovedMergeSort implements SortUtil.Sort { /Pg)@*~
<kWkc|zBY
private static final int THRESHOLD = 10; "=V!-+*@G@
U2v;GIo$yU
/* <(H<*Xf9
* (non-Javadoc) 0%)T]SDS
* k=&n>P
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) @Gy.p5J8
*/ hD4>mpk
public void sort(int[] data) { 9SJSUv:@
int[] temp=new int[data.length]; rK|("
mergeSort(data,temp,0,data.length-1); U*,\UF
} d]MpE9@'v
C>SOd]
private void mergeSort(int[] data, int[] temp, int l, int r) { ^'fgQyj
int i, j, k; A6 `a
int mid = (l + r) / 2; Y?L>KiM$
if (l == r) {|B[[W\TN
return; (H\ `/%Bp
if ((mid - l) >= THRESHOLD) hDQk zqW
mergeSort(data, temp, l, mid); i1'G_bo4F7
else 5>ktr)]
insertSort(data, l, mid - l + 1); F!p;]B
if ((r - mid) > THRESHOLD) cDK)zD
mergeSort(data, temp, mid + 1, r); Vhr6bu]
else UcH#J &r
insertSort(data, mid + 1, r - mid); :8HVq*itS
Od:-fw
for (i = l; i <= mid; i++) { ^P*-bV4
temp = data; o\; hF3
} U<E]c 4*
for (j = 1; j <= r - mid; j++) { d={o|Mf
temp[r - j + 1] = data[j + mid]; YBR)S_C$_
} Z`U+a
int a = temp[l]; Tu5p`p3-j
int b = temp[r]; ael] {'h]
for (i = l, j = r, k = l; k <= r; k++) { ZKq#PB/.
if (a < b) { UEhFId
data[k] = temp[i++]; M{)&SNI*C
a = temp; `S.I,<&
} else { B2a#:E,6
data[k] = temp[j--]; /Ov1eQBNG
b = temp[j]; R/kJUl6HEl
} /lh1sHgD
} WtaOf_
} `j!_tE`
Z0<s -eN:
/** ~(7ct*U~
* @param data _N)&<'lB<
* @param l 1iNMgA
* @param i =p"ma83
*/ p\9}}t7n
private void insertSort(int[] data, int start, int len) { Yl:[b{Py
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); {cb<9Fii
} yn_.
} j>uu3ADd2
} O:GAS [O`
} os&FrtDg
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堆排序： [HUK 9hG
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package org.rut.util.algorithm.support; kytHOn#
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import org.rut.util.algorithm.SortUtil; K]G(u"'
ezCJq`b
/** \=]`X2Ld
* @author treeroot ~8"oH5
* @since 2006-2-2 ewHs ]V+U
* @version 1.0 !n P4S)A
*/ Q\T?t
public class HeapSort implements SortUtil.Sort{ 8 H3u"
kFC*,
/* (non-Javadoc) g_N^Y
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Jj5VBI!Ok
*/ S~E@A.7
public void sort(int[] data) { { 0&l*@c&
MaxHeap h=new MaxHeap(); Cb`,N
h.init(data); ~G-W|>
for(int i=0;i h.remove(); \nPf\6;M
System.arraycopy(h.queue,1,data,0,data.length); "Dc\w@`E 0
} Cl-P6NlR".
] $r].,&
private static class MaxHeap{ yT5OFD|T
yU4mS;GX
void init(int[] data){ `j9\]50Z>
this.queue=new int[data.length+1]; sQ,xTWdj
for(int i=0;i queue[++size]=data; LExm#T`
fixUp(size); !{+.)%d'g
} '`.-75T
} v9Sk\9}S
i$Kx@,O8t
private int size=0; CCol>:8{P
JbS[(+o
private int[] queue; O9/)_:Wdh
.{*l,
public int get() { M\
return queue[1]; Us!ZQ#pP
} G &NK
ZfH>UHft
public void remove() { 8ih_S2Cd
SortUtil.swap(queue,1,size--); D7JrGaF{
fixDown(1); }LKD9U5;8
} *Egg*2P;"Q
file://fixdown zrG
private void fixDown(int k) { yiI oqvP
int j; {wj%WSQj/y
while ((j = k << 1) <= size) { L6fbR-&Lt
if (j < size %26amp;%26amp; queue[j] j++; strM3j##x
if (queue[k]>queue[j]) file://不用交换 2,`X@N`\
break; ?[m1?
SortUtil.swap(queue,j,k); AWx@Z7\z"g
k = j; k{{3nenAG
} KV|D]}
} *AQ3RA8
private void fixUp(int k) { GD]epr%V
while (k > 1) { b @0=&4
int j = k >> 1; 3di;lzGq
if (queue[j]>queue[k]) o:W*#dt
break; Qg~w 3~
SortUtil.swap(queue,j,k); s(5hFuyg
k = j; ;CF:cH*
} *pSnEWwE
} g3&nxZ
:q*w_*w
} R6oD
\G>C{v;
} 5[jS(1a`c
zPqJeYK
SortUtil： M9BEG6E9
SO(BkxV@
package org.rut.util.algorithm; yq[/9PciA
[f6BA|
import org.rut.util.algorithm.support.BubbleSort; N\B&|;-V
import org.rut.util.algorithm.support.HeapSort; Xb>SA|6[|
import org.rut.util.algorithm.support.ImprovedMergeSort; H1B%}G*Ir-
import org.rut.util.algorithm.support.ImprovedQuickSort; fuv{2[NV
import org.rut.util.algorithm.support.InsertSort; d;0]xG?%=
import org.rut.util.algorithm.support.MergeSort; `N.:3]B t
import org.rut.util.algorithm.support.QuickSort; WQ[nK5#
import org.rut.util.algorithm.support.SelectionSort; '@hUmrl
import org.rut.util.algorithm.support.ShellSort; =FV(m S
tlUh8os
/** 7<MEMNYX
* @author treeroot d94k
* @since 2006-2-2 D:bmq93PC
* @version 1.0 gDLS)4^w
*/ EJTM >Rpor
public class SortUtil { nb=mY&q}~
public final static int INSERT = 1; 6)*fr'P
public final static int BUBBLE = 2; .!0Rh9yyl
public final static int SELECTION = 3; 9?O8j1F
public final static int SHELL = 4; 4s9@4
public final static int QUICK = 5; + c3pe4
public final static int IMPROVED_QUICK = 6; *->*p35
public final static int MERGE = 7; mHW%:a\L
public final static int IMPROVED_MERGE = 8; Gt*K:KT=L
public final static int HEAP = 9; 0Atha>w^o~
h+j^VsP zB
public static void sort(int[] data) { z{\tn.67
sort(data, IMPROVED_QUICK); `14@dk
} }BI6dZ~2A
private static String[] name={ y,|2hrj/0E
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" s9CmR]C
}; CZu=/8?
BQ Vro;#Jc
private static Sort[] impl=new Sort[]{ l`N#~<.
new InsertSort(), %\sE\]K
new BubbleSort(), YCltS!k
new SelectionSort(), O{~Xp!QQt
new ShellSort(), G>0d^bx;E
new QuickSort(), \|QB;7u
new ImprovedQuickSort(), d9k`
new MergeSort(), v9Ii8{ca|
new ImprovedMergeSort(), pMHl<HH
new HeapSort() \zg R]|
}; eg}g}a
Z+y'w#MZL
public static String toString(int algorithm){ a dr\l5pWQ
return name[algorithm-1]; cYgJ}(>}
} nng|m
}lX$KuD
public static void sort(int[] data, int algorithm) { OHBCanZZ,
impl[algorithm-1].sort(data); dLb$3!3
} EF\OM?R
WXmfh
public static interface Sort { T\.(e*hC
public void sort(int[] data); QCZ88\jX[
} GLecBF+>F
2hF^U+I}
public static void swap(int[] data, int i, int j) { 4>V@+#Ec5
int temp = data; 5wx~QV=Hh
data = data[j]; 7{O iV}]"
data[j] = temp; JZ-@za6u
} ^-q{:lx
} <Qih&P9;>