[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; 6 r.H8
} gXu^"
int i1=l; AM[jL'r|
int i2=mid+1; %R|"Afa=
for(int cur=l;cur<=r;cur++){ Q*:h/Lhb&
if(i1==mid+1) )4~sQ^}
data[cur]=temp[i2++]; VS9]po>=
else if(i2>r) XalJo@%-
data[cur]=temp[i1++]; |jk-@ Z*
else if(temp[i1] data[cur]=temp[i1++]; h ??C4z
else A!{.|x[S44
data[cur]=temp[i2++]; 'q92E(
} IE)"rTI)b
} *NW QmC~
;4G\]%c)E{
} t@(9ga(
z]c,}Q
改进后的归并排序: Q)Iv_N/
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package org.rut.util.algorithm.support; 'cZMRRc<
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import org.rut.util.algorithm.SortUtil; V3mjbH>F
2{e dW+
/** r]8x;v1
* @author treeroot VyWYfPK
* @since 2006-2-2 ov`^o25f
* @version 1.0 JOrELrMx
*/ !ww:O|0
public class ImprovedMergeSort implements SortUtil.Sort { j/H>0^
c6,s+^^
private static final int THRESHOLD = 10; l Io9,Ke
A<SOT>m]
/* d1V^2Hb?
* (non-Javadoc) DD!MGf/
* {N!E5*$Tr
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) .Iwur;/\
*/ dP$8JI{
public void sort(int[] data) { )'[x)q
int[] temp=new int[data.length]; "{A*(.
mergeSort(data,temp,0,data.length-1); ;8*XOC;[
} h `\$sT!Z
nn@^K6
private void mergeSort(int[] data, int[] temp, int l, int r) { a)!![X?\
int i, j, k; Y=vVxVI\
int mid = (l + r) / 2; B;Xoa,
if (l == r) ItI0x
return; +@emX$cFV
if ((mid - l) >= THRESHOLD) ME$2P!o
mergeSort(data, temp, l, mid); A*8m8Sh$
else YDQ:eebg(
insertSort(data, l, mid - l + 1); <<=e9Lh
if ((r - mid) > THRESHOLD) *Y85DEA
mergeSort(data, temp, mid + 1, r); CmEpir{}(
else ,3Wb4so
insertSort(data, mid + 1, r - mid); L*g. 6+2
gjj 93
for (i = l; i <= mid; i++) { D|@bGN
temp = data; T'ED$}N>~
} 0xJ7M.
for (j = 1; j <= r - mid; j++) { 3 p/b
temp[r - j + 1] = data[j + mid]; "]VDY)
} gi6g"~%@q1
int a = temp[l]; Deg!<[Nw
int b = temp[r]; aUH\Ee^M:R
for (i = l, j = r, k = l; k <= r; k++) { YD&|1h
if (a < b) { F9(._ow[
data[k] = temp[i++]; XE_ir Et
a = temp; ?y~TCqV
} else { I=K!)X$
data[k] = temp[j--]; NO-k-
b = temp[j]; 10wvfRhng
} v*E(/}<v
} 5Sr4-F+@%
} V0K16#}1gM
!z11" c
/** 7~_I=-
* @param data +I t#Z3
* @param l Qg(Z{V
* @param i G&q'#3ieC
*/ +R-h ,$\=7
private void insertSort(int[] data, int start, int len) { wfgqgPo!v
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ?4XnEDAm
} [SVhtrx|%
} W'a(oI
} V=pMq?Nr
} TG}d3ZU !
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堆排序： lDN"atSf
A)tP()+)
package org.rut.util.algorithm.support; w|IjQ1{
*LANGQ"2(i
import org.rut.util.algorithm.SortUtil; 5?WYsj"
*G9sy_
/** xwRhs!`t1
* @author treeroot 5W/{h q8}}
* @since 2006-2-2 -LtK8wl^
* @version 1.0 m9in1RI%
*/ pkJ/oT
public class HeapSort implements SortUtil.Sort{ k<a;[_S
.evbE O5
/* (non-Javadoc) |EKu2We*
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) E<tK4?i"
*/ F^QQ0h]2
public void sort(int[] data) { {~SaRB2<'
MaxHeap h=new MaxHeap(); E<>*(x/\e
h.init(data); A{# Nwd>
for(int i=0;i h.remove(); ! QM.P t7c
System.arraycopy(h.queue,1,data,0,data.length); j~;;l!({i
} H~noJIw#
OS-sk!
private static class MaxHeap{ ^W~p..DF
*U;'OWE[
void init(int[] data){ T*?s@$)m4
this.queue=new int[data.length+1]; V A<5uk04K
for(int i=0;i queue[++size]=data; ~@T<gA9V
fixUp(size); IOL L1ar
} Q_]d5pl
} 7p.>\YtoR}
]1D%zKY%$Z
private int size=0; -(i(02PX
k|xtrW`qo;
private int[] queue; Y34/+Fi
G O{.9_2
public int get() { ~*M$O&
return queue[1]; r> k-KdS
} "g>.{E5
hn.bau[
public void remove() { $Az^Y0[D
SortUtil.swap(queue,1,size--); 'fx UV<K&
fixDown(1); 9i5tVOhE
} K_~h*Yc
file://fixdown <[Q3rJ
private void fixDown(int k) { *)<B0SjT
int j; 1|{bDlmt
while ((j = k << 1) <= size) { "5C`,4s
if (j < size %26amp;%26amp; queue[j] j++; ?-MP_9!JK
if (queue[k]>queue[j]) file://不用交换 ).5RPAP
break; Df4+^B,1
SortUtil.swap(queue,j,k); hoM|P8 }rh
k = j; k1^\|
} LJFG0 W
} Ej=3/RBsV
private void fixUp(int k) { Tlq-m2]
while (k > 1) { QzOkpewf
int j = k >> 1; mj&57D\fq
if (queue[j]>queue[k]) Bj Wr5SJ
break; b0v:12q
SortUtil.swap(queue,j,k); ;{#^MD MB
k = j; [kV;[c}
} fpWg R4__
} oR .cSGh
*T`-|H*6@
} SJ?6{2^
!345 %,
} p5\]5bb
5O<>mCF
SortUtil： uR;gVO+QC
#m<tJnEO
package org.rut.util.algorithm; M;w?[yEZ
:~F:/5
import org.rut.util.algorithm.support.BubbleSort; #3$\Iu
import org.rut.util.algorithm.support.HeapSort; izgp*M,
import org.rut.util.algorithm.support.ImprovedMergeSort; WIr2{+#
import org.rut.util.algorithm.support.ImprovedQuickSort; 'G&{GVbXY
import org.rut.util.algorithm.support.InsertSort; r%@Lej5+
import org.rut.util.algorithm.support.MergeSort; yWDTjY/
import org.rut.util.algorithm.support.QuickSort; jN31hDg<z
import org.rut.util.algorithm.support.SelectionSort; G{Yz8]m
import org.rut.util.algorithm.support.ShellSort; 3S*AxAeg
y [#pC<^
/** .IarkeCtb
* @author treeroot 7O5`v(<9n>
* @since 2006-2-2 asJ!NvVG'
* @version 1.0 '1?\/,em
*/ 1'.7_EQ4T
public class SortUtil { NVKC'==0
public final static int INSERT = 1; 6%,C_7j
public final static int BUBBLE = 2; ~y HU^5D
public final static int SELECTION = 3; DdQ;Q5|
public final static int SHELL = 4; *&BnF\?m
public final static int QUICK = 5; V7d)S&*V
public final static int IMPROVED_QUICK = 6; *NFg;<:j
public final static int MERGE = 7; O7d$YB_'
public final static int IMPROVED_MERGE = 8; 7hP<f}xL
public final static int HEAP = 9; t.T UmJ
H}hFFI)#Oo
public static void sort(int[] data) { :bu>],d-8'
sort(data, IMPROVED_QUICK); &;yH@@Z
} Tm}rH]F&
private static String[] name={ XfPFo6
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" aNcd` $0
}; S$TmZk=
fyTAou6hI
private static Sort[] impl=new Sort[]{ o?L'Pg
new InsertSort(), N|N3x7=gs
new BubbleSort(), fmqb`%
new SelectionSort(), KWAb-yB
new ShellSort(), vo>d!rVCV
new QuickSort(), @"a6fn
new ImprovedQuickSort(), f()FY<b
new MergeSort(), $`ZzvZ'r
new ImprovedMergeSort(), :Z`:nq.a
new HeapSort() -fhN"B)
}; L`f^y;Y.
U,#yqER'r
public static String toString(int algorithm){ [(Xy.L7x
return name[algorithm-1]; 'c2W}$q
} XU!2YO)t;!
-9N@$+T
public static void sort(int[] data, int algorithm) { S/|,u`g-
impl[algorithm-1].sort(data); :B3[:MpL}
} -;f*VM.a
1b=lpw1}
public static interface Sort { oSiMpQu08
public void sort(int[] data); |4$M]Mf0
} E_Z{6&r
C~fjWz' V
public static void swap(int[] data, int i, int j) { T134ZXqqz
int temp = data; V7#v6!7A@
data = data[j]; 4BnSqwa_
data[j] = temp; `E+Jnu,jC
} QaUm1i#
} +uay(3m((