[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; P!!:p2fo
} JHuA}f{2&
int i1=l; [4-u{Tu
int i2=mid+1; JmuoYlf|
for(int cur=l;cur<=r;cur++){ ! QKec
if(i1==mid+1) L>rW S-
data[cur]=temp[i2++]; \*#E4`Y
else if(i2>r) &-KQ m20n
data[cur]=temp[i1++]; {~V_6wY g
else if(temp[i1] data[cur]=temp[i1++]; 91ec^g
else y(j vl|z[
data[cur]=temp[i2++]; ,w,)n^
} +$R%Vbd
} 6-\C?w A
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} UdFYG^i
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改进后的归并排序: w69G6G(
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package org.rut.util.algorithm.support; 0C717
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import org.rut.util.algorithm.SortUtil; MNX-D0`g
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/** CWkAc5
* @author treeroot 9abn6S(XpJ
* @since 2006-2-2 h[]3#
* @version 1.0 uvA2`%T/
*/ *jl_,0g]
public class ImprovedMergeSort implements SortUtil.Sort { T_qh_L3
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private static final int THRESHOLD = 10; ROj=XM:+
~{D:vj4>
/* h)T-7b
* (non-Javadoc) h}%yG{'/M=
* ; zfBe%Uf
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) aT=V/Xh}d
*/ ScC!?rTW~7
public void sort(int[] data) { {\kDu#18Ld
int[] temp=new int[data.length]; xKoNo^FF
mergeSort(data,temp,0,data.length-1); w&}UgtEm
} ^j'vM\^`ml
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private void mergeSort(int[] data, int[] temp, int l, int r) { "Oy&6rrr
int i, j, k; RH<C:!F^
int mid = (l + r) / 2; |y2cI,&
if (l == r) dUpOg{I.x
return; B'D4]EB
if ((mid - l) >= THRESHOLD) \8SHX
mergeSort(data, temp, l, mid); 4?e7s.9N
else d?(eL(W
insertSort(data, l, mid - l + 1); H@8 ;6D
if ((r - mid) > THRESHOLD) XJf1LGT5
mergeSort(data, temp, mid + 1, r); }UHoa
else B9h>
insertSort(data, mid + 1, r - mid); S?m4
.:jfNp~jt
for (i = l; i <= mid; i++) { [u`9R<>c"U
temp = data; |p+ xM
} W$Zc;KRz$0
for (j = 1; j <= r - mid; j++) { LL=nMoS
temp[r - j + 1] = data[j + mid]; Jx= v6==7
} h2edA#bub
int a = temp[l]; o8S)8_3
int b = temp[r]; UjQi9ELoJ
for (i = l, j = r, k = l; k <= r; k++) { f5QJj<@
if (a < b) { #FV`*G
data[k] = temp[i++]; -\=kd {*B
a = temp; atWAhN
} else { XWFuAE
data[k] = temp[j--]; ]#oqum@Yf1
b = temp[j]; (#k2S-5
} ^7% KS
} #-u?+Nk/
} S#, E)h/
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/** =9vmRh?8
* @param data ~0@+8%^>;
* @param l T1r^.;I:
* @param i g3uI1]QXLg
*/ EYF]&+ 9
private void insertSort(int[] data, int start, int len) { kT6EHuB
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); })}-K7v1+
} a=3{UEi'o
} +']S
} !U!}*clYL
} zos#B30
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堆排序： T5di#%: s
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package org.rut.util.algorithm.support; !'EE8Tp~F
$:MO/Suz{
import org.rut.util.algorithm.SortUtil; B%Spmx8
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/** 1~#p3)B
* @author treeroot ?QXo]X;f&
* @since 2006-2-2 D2}nJFR ]
* @version 1.0 {CR'Z0
*/ ,*@6NK,.
public class HeapSort implements SortUtil.Sort{ <U]#722
-!]dU`:(X
/* (non-Javadoc) nY<hfqof
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) D;al(q
*/ vMOit,{
public void sort(int[] data) { 1JoRP~mMxa
MaxHeap h=new MaxHeap(); #5x[Z[m
h.init(data); ` `R;x
for(int i=0;i h.remove(); {?9s~{Dl
System.arraycopy(h.queue,1,data,0,data.length); ! G+/8Q^
} Tfl4MDZb
7)Rx-
private static class MaxHeap{ Y-WYQ{
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void init(int[] data){ KwiTnP!Dca
this.queue=new int[data.length+1]; KD7RI3'?
for(int i=0;i queue[++size]=data; xFY;aK
fixUp(size); v+|N7
} nUvxO `2
} 8y{<M"v+/
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private int size=0; 43Yav+G(+
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private int[] queue; $Y4;Xe=
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public int get() { Oj*3'?<7=
return queue[1]; &` u<KKF6
} pcw^W
b!ZXQn3X<
public void remove() { Kj_hCSvf3e
SortUtil.swap(queue,1,size--); ;?i(WV}ee
fixDown(1); 6 /Apdn1[
} B{SzC=4f}
file://fixdown Wb"*9q06
private void fixDown(int k) { B;?"R
int j; t,.MtU>K@
while ((j = k << 1) <= size) { $Rsf`*0-
if (j < size %26amp;%26amp; queue[j] j++; hb"t8_--c
if (queue[k]>queue[j]) file://不用交换 :hG?} [-2
break; 8_K22]c5
SortUtil.swap(queue,j,k); Q+[e)YO)
k = j; XX,iT~+-
} 0*"auGuX
} \z<B=RT\
private void fixUp(int k) { v3+\Aq
while (k > 1) { <m80e),~
int j = k >> 1; #"a?3!wr
if (queue[j]>queue[k]) H85HL-{
break; H\2+cAFN#
SortUtil.swap(queue,j,k); N(@'L43$V
k = j; ~n84x
} pI |;
} ]}cai1
})|+tZ
} qDO4&NO
elZ?>5P$}
} KD^>Vv#
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SortUtil： 02} &h
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package org.rut.util.algorithm; . oUaq|O
*tjE#TW
import org.rut.util.algorithm.support.BubbleSort; 2i4FIS|z0
import org.rut.util.algorithm.support.HeapSort; Xz0jjO,
import org.rut.util.algorithm.support.ImprovedMergeSort; 0CxQ@~ttl
import org.rut.util.algorithm.support.ImprovedQuickSort; A?3hNvfx
import org.rut.util.algorithm.support.InsertSort; lkV% k1w
import org.rut.util.algorithm.support.MergeSort; k=O2s'F`
import org.rut.util.algorithm.support.QuickSort; )kl| 5i
import org.rut.util.algorithm.support.SelectionSort; >UpTMEQ
import org.rut.util.algorithm.support.ShellSort; hFP$MFab
S?%V o* Y
/** 50(/LV1
* @author treeroot k`r}Gb
* @since 2006-2-2 :*e0Z2=
* @version 1.0 8f% @
*/ =V1k'XJ
public class SortUtil { S'HM|&
public final static int INSERT = 1; O9]j$,i
public final static int BUBBLE = 2; -,et. *
public final static int SELECTION = 3; (j+C&*u
public final static int SHELL = 4; 7ju7QyR
public final static int QUICK = 5; Gu<3*@Ng
public final static int IMPROVED_QUICK = 6; I~MBR2$9
public final static int MERGE = 7; 3Qe:d_
public final static int IMPROVED_MERGE = 8; >/EmC3?b!
public final static int HEAP = 9; _h7+.U=
dZRz'd
public static void sort(int[] data) { f 5_n2
sort(data, IMPROVED_QUICK); L._I"g5 H9
} Nm#VA.~
private static String[] name={ $g _h9L
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ,:QG%Et
}; [bJ/$A
X4&{/;$
private static Sort[] impl=new Sort[]{ yyrCO"eh
new InsertSort(), 0^|)[2m!
new BubbleSort(), }3Pz{{B&+O
new SelectionSort(), ;'dw`)~jQ
new ShellSort(), X(1nAeQ
new QuickSort(), s'ntf
new ImprovedQuickSort(), T.!GEUQ
new MergeSort(), X}_}`wIn
new ImprovedMergeSort(), SMk{159q&
new HeapSort() R,/?p
}; ()K%Rn
X^?<, Y)1.
public static String toString(int algorithm){ )m"NO/sJ2
return name[algorithm-1]; (zBa2Vmmv
} ._=Pa)T
6 EE7<&
public static void sort(int[] data, int algorithm) { ?)7uwJsH
impl[algorithm-1].sort(data); RP7e)?5$s
} /+P 4cHv]F
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public static interface Sort { *(s+u~, I
public void sort(int[] data); Q<d\K(<3?:
} 4*lShkL
,|"tLN*m
public static void swap(int[] data, int i, int j) { T^aEx.`O}`
int temp = data; +XJj:%yt
data = data[j]; u=jF\W9
data[j] = temp; CY0|.x
} f/?# 1
} 4 Yc9Ij