[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<g N[
} = o1&.v2j
int i1=l; nC9xN
int i2=mid+1; s8r[U, }(
for(int cur=l;cur<=r;cur++){ }\ya6Gi8
if(i1==mid+1) 09Z\F^*$F
data[cur]=temp[i2++]; vFgnbWxG
else if(i2>r) bGp3V. H
data[cur]=temp[i1++]; U owbk:
else if(temp[i1] data[cur]=temp[i1++]; GM@0$
else ;|Rrtf9
data[cur]=temp[i2++]; ?SoRi</1
} $*+UX
} ;@[ax{ J
If@%^'^ON=
} r$!
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改进后的归并排序: \e?w8R.6w^
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package org.rut.util.algorithm.support; \!r,>P
*;<oM]W_
import org.rut.util.algorithm.SortUtil; F4&`0y:
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/** 3DZ8-N S
* @author treeroot >t $^U
* @since 2006-2-2 0 |Rmb
* @version 1.0 lXrAsm$
*/ sYyya:ykxT
public class ImprovedMergeSort implements SortUtil.Sort { +~EFRiP]
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private static final int THRESHOLD = 10; I h 19&D
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/* Q\Nz^~dQ:Y
* (non-Javadoc) >xm:?WR
* Eg]tDPN1
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) D{, b|4
*/ Z%Yq{tAt
public void sort(int[] data) { zCpXF<_C
int[] temp=new int[data.length]; Lq5Eu$;r
mergeSort(data,temp,0,data.length-1); zT _[pa)O`
} { Em fw9L
X>s'_F?
private void mergeSort(int[] data, int[] temp, int l, int r) { |z.Z='`
int i, j, k; :*E#w"$,j
int mid = (l + r) / 2; koOp:7r
if (l == r) kQ $.g<
return; 1}I%yOi)
if ((mid - l) >= THRESHOLD) UE%~SVi.#
mergeSort(data, temp, l, mid); lRA!
else 83gp'W{|
insertSort(data, l, mid - l + 1); fGDjX!3-S
if ((r - mid) > THRESHOLD) *Zk$P.]
mergeSort(data, temp, mid + 1, r); H=>;Mj
else Xx=c'j<
insertSort(data, mid + 1, r - mid); :|E-Dx4F6H
P}$DCD<$U
for (i = l; i <= mid; i++) { eTY""EWU
temp = data; 2z=aP!9]
} ch:0qgJ
for (j = 1; j <= r - mid; j++) { v.e~m2u_F
temp[r - j + 1] = data[j + mid]; Z3nmC-NE
} x[eho,6)
int a = temp[l]; 3h>56{P
int b = temp[r]; :~dI2e\:
for (i = l, j = r, k = l; k <= r; k++) { TmO3hKaP
if (a < b) { t(.xEl;Ma
data[k] = temp[i++]; $_&gT.>
a = temp; VA@t8H,
} else { |H@1g=q
data[k] = temp[j--]; YWUCrnr
b = temp[j]; hG%J:}
} }SF<. A
} c/ABBvd|
} !$^LTBOH3
m}>#s3KPA
/** zD}2Zh]
* @param data i slg5
* @param l {qjw S1v
* @param i 94xRKQ}
*/ b'5L|1d
private void insertSort(int[] data, int start, int len) { q8e34Ly7
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); CLX!qw]@ +
} T@,tlIM
} IA?v[xu
} b#z{["%Zp
} M?zwXmTVW0
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堆排序： x9B{|+tIoc
dw e$, 9
package org.rut.util.algorithm.support; \4pWHE/
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import org.rut.util.algorithm.SortUtil; Z4'8x h)-
O&De!Gx
/** A +J&(7N
* @author treeroot j_2yTz"G-
* @since 2006-2-2 ~^pV>>LX|
* @version 1.0 1{7*0cv$iL
*/ ZpTT9{PT=:
public class HeapSort implements SortUtil.Sort{ v08Xe*gNU
;`MKi5g
/* (non-Javadoc) W|aFEY
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 57eA(uI
*/ 5 U{}A\q
public void sort(int[] data) { WTP~MJ#C
MaxHeap h=new MaxHeap(); l^*'W(%
h.init(data); gx)!0n;
for(int i=0;i h.remove(); r @ IyK%
System.arraycopy(h.queue,1,data,0,data.length); @z1Yj"^Pm
} :#=XT9
\ZPmPu9^(
private static class MaxHeap{ /kKF|Hg`c
/MUa b*h
void init(int[] data){ vuE 1(CR
this.queue=new int[data.length+1]; U4hFPK<
for(int i=0;i queue[++size]=data; %Vp'^,&S
fixUp(size); |Q)c{9sD
} l;C00ZBOc
} Xitsbf=Gg
M@b:~mI[sw
private int size=0; J$X{4
{"x8q
private int[] queue; K~B@8az
o> i`Jq&
public int get() { W~e/3#R\=
return queue[1]; Z}Ld!Byz
} 9e*v&A2Y'
p%+uv\Ix
public void remove() { 3"ii_#1
SortUtil.swap(queue,1,size--); ya^zlj\`0e
fixDown(1); i`}nv,
} R8U?s/*
file://fixdown g*nh8
private void fixDown(int k) { "}(g3Iy
int j; B5iVT<:a
while ((j = k << 1) <= size) { ?i8a)!U
if (j < size %26amp;%26amp; queue[j] j++; qfQg?Mr
if (queue[k]>queue[j]) file://不用交换 1:+f@#
break; R!8qkG
SortUtil.swap(queue,j,k); / .ddx<
k = j; ..g?po
} ,xeJf6es
} ;$Q&2}L[
private void fixUp(int k) { DiLZ5^`]
while (k > 1) { [aF^D;o
int j = k >> 1; mDT"%I"4j
if (queue[j]>queue[k]) #o]/&T=N=
break; X!vBD
SortUtil.swap(queue,j,k); ^+m6lsuA
k = j; 1>BY:xZr
} ^mA^7jB
} XpLK0YI
r#xq 8H=_m
} cU^Z=B
L&WhX3$u
} p*_^JU(<p
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SortUtil： a2MFZe
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package org.rut.util.algorithm; 9Rg|oCP_
cy6lsJ"?
import org.rut.util.algorithm.support.BubbleSort; 5A~lu4-q
import org.rut.util.algorithm.support.HeapSort; HoIK^t~VT#
import org.rut.util.algorithm.support.ImprovedMergeSort; ?7Y6: zo$^
import org.rut.util.algorithm.support.ImprovedQuickSort; YFF\m{#
import org.rut.util.algorithm.support.InsertSort; {xzs{)9|Y4
import org.rut.util.algorithm.support.MergeSort; yp}a&Dg
import org.rut.util.algorithm.support.QuickSort; BmP!/i_
import org.rut.util.algorithm.support.SelectionSort; +l "z
import org.rut.util.algorithm.support.ShellSort; t69C48}15
G{ 9p.Q
/** ?IWLH-fkP
* @author treeroot xKl!{A9$w
* @since 2006-2-2 YF]W<ZpY
* @version 1.0 k_^|%xJ
*/ 7vRFF@eq}
public class SortUtil { t3dvHU&Z:
public final static int INSERT = 1; !G0OD$
public final static int BUBBLE = 2; Sas&P:#r
public final static int SELECTION = 3; $i^#KZ}-WK
public final static int SHELL = 4; 2th>+M~A
public final static int QUICK = 5; /R2K3E#
public final static int IMPROVED_QUICK = 6; W.fsW<{4j
public final static int MERGE = 7; 1I{^]]qw
public final static int IMPROVED_MERGE = 8; B`Q~p92
public final static int HEAP = 9; z)Is:LhS
QR+{Yp
public static void sort(int[] data) { t=IpVl!
sort(data, IMPROVED_QUICK); S8{Sb>
} Dp5hr8bT
private static String[] name={ bP4<q?FKcN
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 'k?%39
}; R*v~jR/
Oc|`<^m
private static Sort[] impl=new Sort[]{ `H:5D5]
new InsertSort(), _Py/,Ks.q
new BubbleSort(), ?G48GxJ
new SelectionSort(), Y0f"}A1
new ShellSort(), vUX(h.}8
new QuickSort(), `pHlGbrW
new ImprovedQuickSort(), mkR1iY
new MergeSort(), w;RG*rv
new ImprovedMergeSort(), u9.x31^
new HeapSort() -W^jmwM
}; Y'75DE<BC
x2^Yvgc-
public static String toString(int algorithm){ Guc~] B
return name[algorithm-1]; |m^qA](M
} 80p?qe
C1/<t)^
public static void sort(int[] data, int algorithm) { y}'c)u
impl[algorithm-1].sort(data); %,l+?fF
} eX;Tufe*(Q
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public static interface Sort { j"8f,er
public void sort(int[] data); KNkVI K
} `YZK$ -,
tKnvNOhn
public static void swap(int[] data, int i, int j) { ,}("es\b
int temp = data; x"n!nT%Z
data = data[j]; aetK<9L$
data[j] = temp; ;oKN8vI#7
} :f~[tox
} IsaL+elq|