[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; jxTYW)E
} =w2_1F"
int i1=l; |}naI_Qudv
int i2=mid+1; &M*f4PeXb
for(int cur=l;cur<=r;cur++){ "*Gp@
if(i1==mid+1) p5JRG2zt
data[cur]=temp[i2++]; QBL|n+
else if(i2>r) L1YiXJ,T,
data[cur]=temp[i1++]; y$U(oIU>
else if(temp[i1] data[cur]=temp[i1++]; t$-!1jq
else !nt[J$.z^
data[cur]=temp[i2++]; /L*JHNu"_
} 0t(js_
} J ` KyS
c!dc`R
} p-JGDjR0G
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改进后的归并排序: K| '`w.
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package org.rut.util.algorithm.support; YK%rTbB(
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import org.rut.util.algorithm.SortUtil; DZqY=Sze
!?5YXI,
/** VQl(5\6O
* @author treeroot ~NG+DyGa=
* @since 2006-2-2 @23~)uiZa
* @version 1.0 OmLe+,7'
*/ tzrvIVD
public class ImprovedMergeSort implements SortUtil.Sort { }0~X)Vgm(
]..7t|^b&
private static final int THRESHOLD = 10; Zgt(zh_l
Ri;_ 8v[H|
/* "WZ|
* (non-Javadoc) njckPpyb@
* 1"UHe*2
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) t$g@+1p4
*/ Sjo7NR^#e
public void sort(int[] data) { 2(H-q(
int[] temp=new int[data.length]; t[o_!fmxZ
mergeSort(data,temp,0,data.length-1); 20cEE>
} do:IkjU~
p> g[: ~
private void mergeSort(int[] data, int[] temp, int l, int r) { FwUgMR*xq
int i, j, k; \gR%PN
int mid = (l + r) / 2; ,-[z?dvO
if (l == r) Fs&r^ [/b
return; 8\Bb7*
if ((mid - l) >= THRESHOLD) tn}MKo
mergeSort(data, temp, l, mid); |dhKeg_
else {A'_5 X9
insertSort(data, l, mid - l + 1); ||4T*B06
if ((r - mid) > THRESHOLD) fwNj@fl_,e
mergeSort(data, temp, mid + 1, r); !<?<f db
else -ARks_\
insertSort(data, mid + 1, r - mid); 9_fbl:qk;\
;Vpp1mk|
for (i = l; i <= mid; i++) { VS@e[,
temp = data; %`*On~
} [Qcht,\^v
for (j = 1; j <= r - mid; j++) { Q89fXi0Ivb
temp[r - j + 1] = data[j + mid]; e, fZ>EJ
} fZrh_^yH
int a = temp[l]; " =6kH,
int b = temp[r]; wf`A&P5tF
for (i = l, j = r, k = l; k <= r; k++) { .3&(Y
if (a < b) { N&^zXY
data[k] = temp[i++]; &x7iEbRs
a = temp; +lxjuEiae
} else { sou~m,#
data[k] = temp[j--]; [iZH[7&j
b = temp[j]; EjMVlZC>
} xpc{#/Nk
} p6!5}dD(
} Y&H<8ez
0TZB}c#qT
/** &gKDw!al
* @param data F?[1m2
* @param l '6; {DX
* @param i +P8CC fPu
*/ x"!`JDsS
private void insertSort(int[] data, int start, int len) { @dx8{oQ
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); $JUkwsc
} &>&6OV]P'
} @T:J<,
} r)#W`A1{A
} ==Xy'n9'
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堆排序： [$;cjys
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package org.rut.util.algorithm.support; C+g}+
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import org.rut.util.algorithm.SortUtil; A*~G[KC3(
tGU~G&
/** 7'"qW"<
* @author treeroot P;o{t
* @since 2006-2-2 _",<at
* @version 1.0 z~3GgR"1d
*/ zjh:jrv~
public class HeapSort implements SortUtil.Sort{ FzcXSKHV%
rZ|p{ym
/* (non-Javadoc) #/o~h|g
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) BGxwPJd
*/ *hru);OJr
public void sort(int[] data) { TA0(U$ 4
MaxHeap h=new MaxHeap(); lg8@^Pm$r;
h.init(data); Hy1$Kvub
for(int i=0;i h.remove(); 1Y*k"[?dW
System.arraycopy(h.queue,1,data,0,data.length); Kei0>hBi
} 'tY(&&
fLqjBG]<
private static class MaxHeap{ R~T}
f}"eN/T
void init(int[] data){ ^3BPOK[*gB
this.queue=new int[data.length+1]; ,h*N9}xYTi
for(int i=0;i queue[++size]=data; mvK^')
fixUp(size); 9I]Bt=2z
} >mX6;6FF
} |T@SlNi]
nq HpYb6I0
private int size=0; J@2wPKh?Yp
Rx&O}>"E>l
private int[] queue; NIVR;gm
z?.9)T9_
public int get() { ""jW'%wR
return queue[1]; Te L&6F$
} E I(e3
l=p_
public void remove() { @,GL&$Y:W
SortUtil.swap(queue,1,size--); Q5T3
fixDown(1); aqN{@|
} !5(DU~S*@S
file://fixdown V~[b`&F
private void fixDown(int k) { !IdVg$7
int j; <O 0Q]`i
while ((j = k << 1) <= size) { mf$YsvPq*+
if (j < size %26amp;%26amp; queue[j] j++; #p@GhI!6
if (queue[k]>queue[j]) file://不用交换 W/bW=.d Jd
break; :Q>e54]'&
SortUtil.swap(queue,j,k); 'z5jnI
k = j; $ mE*=
} 38p"lT
} tngB;9c+w
private void fixUp(int k) { /]3[|
while (k > 1) { \hgd&H0UU
int j = k >> 1; u6Gqg(7hw
if (queue[j]>queue[k]) Hvm}@3F|
break; p"p~Bx
SortUtil.swap(queue,j,k); yiQ?p:DM
k = j; &L$9Ii
} ?iP7Ki
} f(w>(1&/B
Cjr]l!
} xyL)'C
7-K8u
} ?h&XIM(
W+!UVUpW
SortUtil： |T""v_q
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package org.rut.util.algorithm; "u7[[.P)
'c7nh{F
import org.rut.util.algorithm.support.BubbleSort; S4_/%~?
import org.rut.util.algorithm.support.HeapSort; =WT$\KYGv
import org.rut.util.algorithm.support.ImprovedMergeSort; ;zJb("n
import org.rut.util.algorithm.support.ImprovedQuickSort; bwXeEA@{
import org.rut.util.algorithm.support.InsertSort; RH;ulAD6(~
import org.rut.util.algorithm.support.MergeSort; X?'cl]1?
import org.rut.util.algorithm.support.QuickSort; ML905n u
import org.rut.util.algorithm.support.SelectionSort; h5'hP>b#
import org.rut.util.algorithm.support.ShellSort; :E.a.-
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/** C12UZE;
* @author treeroot ^<OYW|q?\r
* @since 2006-2-2 0qJ (RB
* @version 1.0 p3U)J&]c6
*/ gPKf8{#%e
public class SortUtil { Y.Zd_,qy
public final static int INSERT = 1; nXRa_M(z8
public final static int BUBBLE = 2; qS+;u`s
public final static int SELECTION = 3; QgqJ #
public final static int SHELL = 4; RJWO h
public final static int QUICK = 5; zkRAul32|
public final static int IMPROVED_QUICK = 6; 754MQK|g
public final static int MERGE = 7; SCcvU4`o
public final static int IMPROVED_MERGE = 8; l)[|wPf
public final static int HEAP = 9; 1<BKTMBq?{
$z%(He
public static void sort(int[] data) { P?h1nxm`'
sort(data, IMPROVED_QUICK); ?@G s7'
} 3@V?L:J
private static String[] name={ w{W+WJ
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" !{jw!bB
}; bZYayjxZ5i
f(|k0$EIu
private static Sort[] impl=new Sort[]{ C(XV YND3
new InsertSort(), 44ty,M3
new BubbleSort(), #%;Uh
new SelectionSort(), {6ZSf[Y6B
new ShellSort(), Uqel UL}
new QuickSort(), xvOz*vM?
new ImprovedQuickSort(), r W`7<3
new MergeSort(), 64?HqO 6(
new ImprovedMergeSort(), uBRlvNJ
new HeapSort() R2Tt6
}; dun`/QKV
{nKw<F2
public static String toString(int algorithm){ h< r(:.%!}
return name[algorithm-1]; C1D:Xi-
} m%[e_eS
;g!rc#z2g
public static void sort(int[] data, int algorithm) { H4y9\ -
impl[algorithm-1].sort(data); s:tX3X
} a dqS.xs
\t!~s^Oox
public static interface Sort { ]<^2B?}
public void sort(int[] data); B"_O!
} `> %QCc\
L/ 7AGR|;C
public static void swap(int[] data, int i, int j) { c7XBZ%D
int temp = data; X}Oe'y
data = data[j]; ^{uHph9ny
data[j] = temp; |cU75 S1
} a.V5fl0?I@
} Lk !)G'42