[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; l^qI,M
} _j3fAr(V
int i1=l; nrb Ok4Dz
int i2=mid+1; M_8{]uo
for(int cur=l;cur<=r;cur++){ {8OCXus3m
if(i1==mid+1) |^aKs#va
data[cur]=temp[i2++]; "oD[v
else if(i2>r) 36NpfTW
data[cur]=temp[i1++]; ceV}WN19l
else if(temp[i1] data[cur]=temp[i1++]; 4Up/p&1@
else }'.m*#Y
data[cur]=temp[i2++]; c|%6e(g"L
} ^s=8!=A(
} C]#,+q*
PM+[,H
} $?Wb}DU7_L
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改进后的归并排序: 6 r"<jh#
ise-O1'
package org.rut.util.algorithm.support; "fI6Cpc
'%D7C=;^
import org.rut.util.algorithm.SortUtil; ,)XLq8
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/** w@b)g
* @author treeroot "8RSvT<W^5
* @since 2006-2-2 ! z**y}<T
* @version 1.0 P'2Qen*
*/ E3i4=!Y
public class ImprovedMergeSort implements SortUtil.Sort { 6-I'>\U~
!?XC1xe~R
private static final int THRESHOLD = 10; eIlva?
FtZ?C@1/
/* >bxS3FCX
* (non-Javadoc) -%~4W?
* M{\I8oOg
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) q@&6#B
*/ J1vR5wbu
public void sort(int[] data) { (=$x.1
int[] temp=new int[data.length]; g*Phv|kI
mergeSort(data,temp,0,data.length-1); '7/)Ot(
} y^k$Us
KP"+e:a%
private void mergeSort(int[] data, int[] temp, int l, int r) { Rv=YFo[B
int i, j, k; S:Hl/:iV
int mid = (l + r) / 2; 74u&%Rj
if (l == r) <[phnU^ 8
return; sS Mh`4'
if ((mid - l) >= THRESHOLD) (ZGbhMK
mergeSort(data, temp, l, mid); <Uur^uB
else y(&Ac[foS}
insertSort(data, l, mid - l + 1); 6mE\OS-I
if ((r - mid) > THRESHOLD) y2v^-q3
mergeSort(data, temp, mid + 1, r); iwq!w6+
else F:VIzyMq<
insertSort(data, mid + 1, r - mid); GeqPRah
:Al!1BJQ
for (i = l; i <= mid; i++) { 5bIw?%dk(
temp = data; SKtrtm
} y9;Yivr)
for (j = 1; j <= r - mid; j++) { =vPj%oLp'a
temp[r - j + 1] = data[j + mid]; lk!@?
} s.#`&Sd>
int a = temp[l]; z{6Z 11|
int b = temp[r]; l.]xB,k
for (i = l, j = r, k = l; k <= r; k++) { FlQGgVN
if (a < b) { @c#(.=
data[k] = temp[i++]; >usL*b0%
a = temp; =v\.h=~~
} else { ':q p05t
data[k] = temp[j--]; *R"/|Ka
b = temp[j]; BWNi [^]
} lFkR=!?=
} 7,MR*TO,
} s*4dxnS_8
3 {V>S,O3]
/** /efUjkP
* @param data i@q&5;%%
* @param l )_:NLo:
* @param i 1cDF!X]
*/ ~rm_vo
private void insertSort(int[] data, int start, int len) { /xQTxh1;K
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); NRuNKl.v
} TrNF=x>
} 0"R|..l/
} g7|@
} uNyVf7u
ni<(K 0~
堆排序： %xW"!WbJ|
YR70BOxK
package org.rut.util.algorithm.support; >_TZ'FT
Om<a<q
import org.rut.util.algorithm.SortUtil; rA1._
"7 yD0T)2
/** yu|>t4#GT
* @author treeroot >lm&iF3y
* @since 2006-2-2 dQvcXl]
* @version 1.0 cl1T8vFM
*/ :3PH8TL
public class HeapSort implements SortUtil.Sort{ +t.b` U`-
xo)P?-
/* (non-Javadoc) [UR-I0 s!/
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 6Zo}(^Ovz
*/ 54,er$$V
public void sort(int[] data) { pCDmXB
MaxHeap h=new MaxHeap(); W)/#0*7
h.init(data); 5G#n"}T
for(int i=0;i h.remove(); ^q&x7Kv%
System.arraycopy(h.queue,1,data,0,data.length); K"6vXv4QO
} iscz}E,Y
#Z#-Ht
private static class MaxHeap{ X2_=agEP
mq l Z?-
void init(int[] data){ Ef\-VKh
this.queue=new int[data.length+1]; hPh-+Hb
for(int i=0;i queue[++size]=data; \['Cj*ek
fixUp(size); nTas~~Q
} #_1`)VS
} =I<R!ZSN
aXVFc5C\
private int size=0; (:_$5&i7
hp2t"t
private int[] queue; 965jtn
VVZ'i.*_3?
public int get() { hgmCRC
return queue[1]; W^Yxny
} D9df=lv mD
~[ jQ!tz
public void remove() { |pK!S
SortUtil.swap(queue,1,size--); I]575\bA
fixDown(1); ' QG?nu
} R-:2HRaA
file://fixdown ?[AD=rUC
private void fixDown(int k) { c$,P ~Ws'
int j; HQ g^ h
while ((j = k << 1) <= size) { w]H->B29C
if (j < size %26amp;%26amp; queue[j] j++; sK{e*[I>W
if (queue[k]>queue[j]) file://不用交换 9x8fhAy}4
break; 5R-6ji
SortUtil.swap(queue,j,k); b 6p|q_e
k = j; XSDpRo
} Y73C5.dNcE
} :h$$J lP
private void fixUp(int k) { oRFq@g
while (k > 1) { |>Vb9:q9Po
int j = k >> 1; ok[i<zl;'
if (queue[j]>queue[k]) ixFi{_
break; .8R@2c`}Cs
SortUtil.swap(queue,j,k); m*pJBZxd
k = j; w(/S?d
} 6<]lW
} 2iOV/=+
YVU7wW,1
} \G[$:nS
-@s#uA h
} 7r!x1
M7T5 ~/4
SortUtil： s*[bFJwN
Sf'CN8
package org.rut.util.algorithm; I0-MRU~[K
%{|pj +
import org.rut.util.algorithm.support.BubbleSort; \<' ?8ri#
import org.rut.util.algorithm.support.HeapSort; L#J1b!D&<6
import org.rut.util.algorithm.support.ImprovedMergeSort; fl(wV.Je|
import org.rut.util.algorithm.support.ImprovedQuickSort; \Z/@C lCm
import org.rut.util.algorithm.support.InsertSort; s#11FfF`
import org.rut.util.algorithm.support.MergeSort; o4X{L`m
import org.rut.util.algorithm.support.QuickSort; Wc#24:OKe3
import org.rut.util.algorithm.support.SelectionSort; +2{Lh7Ks
import org.rut.util.algorithm.support.ShellSort; Oz95
Pal=F0-Q\
/** &pRREu:[4L
* @author treeroot %Zi} MPx
* @since 2006-2-2 $I=~S[p
* @version 1.0 nKY6[|!#
*/ xEI%D|)<
public class SortUtil { 0;k# *#w
public final static int INSERT = 1; 3n _htgcv
public final static int BUBBLE = 2; siI;"?
public final static int SELECTION = 3; {.yB'.k?
public final static int SHELL = 4; {mg2pfhB!
public final static int QUICK = 5; M >u_4AY
public final static int IMPROVED_QUICK = 6; QV!up^Zso
public final static int MERGE = 7; 2ESo2
public final static int IMPROVED_MERGE = 8; ]DcFySyv
public final static int HEAP = 9; r;{.%s7
RP"kC4~1
public static void sort(int[] data) { aOp\91
sort(data, IMPROVED_QUICK); wT@og|M
} icgfB-1|i
private static String[] name={ l**X^+=$
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" dH!*!r>
}; 6Oq7#3]
UNYqft4
private static Sort[] impl=new Sort[]{ CTb%(<r
new InsertSort(), L,\Iasv
new BubbleSort(), @]j1:PN-
new SelectionSort(), {FkF
new ShellSort(), .nJz G
new QuickSort(), s<Ziegmw|g
new ImprovedQuickSort(), -f .,tM=
new MergeSort(), jp,4h4C^)
new ImprovedMergeSort(), P0@,fd<
new HeapSort() &yg|t5o
}; %EH)&k
& 21%zPm
public static String toString(int algorithm){ LVGe]lD
return name[algorithm-1]; ?< +WG/(d
} 1Mzmg[L8
<)9y{J}s:
public static void sort(int[] data, int algorithm) { -RwE%cr
impl[algorithm-1].sort(data); o&%g8=n%
} %J(:ADu]
la!~\wpa
public static interface Sort { G{}VPcrbC
public void sort(int[] data); FPz9N@M%Q
} MtdG>TzUn
54T`OE =
public static void swap(int[] data, int i, int j) { b6bHTH0
int temp = data; TjH][bH5
data = data[j]; @gblW*Zhk
data[j] = temp; 01]f2.5
} _6Sp QW
} t.<i:#rj>l