[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; B0!"A
} mzc 4/<th
int i1=l; `o?Ph&p}
int i2=mid+1; r~nsN*t
for(int cur=l;cur<=r;cur++){ VZ](uFBY
if(i1==mid+1) 1`9xIm*9w
data[cur]=temp[i2++]; @%lBrM
else if(i2>r) zyg }F
data[cur]=temp[i1++]; ?zJOh^
else if(temp[i1] data[cur]=temp[i1++]; PF7&p~O(Z
else GSQ/NYK
data[cur]=temp[i2++]; u% n*gcY
} b-*3 2Y%
} ^ Dt#$Z
`TPOCxM Mo
} \3jW~FV
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改进后的归并排序: $gM8{.!
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package org.rut.util.algorithm.support; ZzBQe
STw#lU) %(
import org.rut.util.algorithm.SortUtil; zf>5,k'x'A
FwZ>{~?3
/** ~/ilx#d
* @author treeroot ^F"iP7
* @since 2006-2-2 @*DyZB
* @version 1.0 \y{Tn@7
*/ 'EfR|7m
public class ImprovedMergeSort implements SortUtil.Sort { 4r0b)Y&I
Yl$SW;@
private static final int THRESHOLD = 10; g@Qgxsyk>
b(I2m
/* PeE/iZ.
* (non-Javadoc) .*JA!B
* F5qFYL;
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 1#4PG'H
*/ N#_GJSG_|
public void sort(int[] data) { wgRsZ
int[] temp=new int[data.length]; O8W7<Wc|z
mergeSort(data,temp,0,data.length-1); awUx=%ERtA
} 4~OQhiJ
@IP)S[^' t
private void mergeSort(int[] data, int[] temp, int l, int r) { N9<Ujom
int i, j, k; h}Wdh1.M3
int mid = (l + r) / 2; 1uk0d`JL
if (l == r) 3o|I[!2.
return; ,mL !(US
if ((mid - l) >= THRESHOLD) k%op> &
mergeSort(data, temp, l, mid); v^7LctcVm
else EK$Kee}~
insertSort(data, l, mid - l + 1); vHE^"l5v
if ((r - mid) > THRESHOLD) K!mOr
mergeSort(data, temp, mid + 1, r); oo$MWN8a>r
else o(Cey7
insertSort(data, mid + 1, r - mid); 02k4N%
xlR2|4|8
for (i = l; i <= mid; i++) { 35x 0T/8
temp = data; hwDbs[:
} X5*C+ I=2
for (j = 1; j <= r - mid; j++) { ow'lRHZ
temp[r - j + 1] = data[j + mid]; ez9k4IO
} rqlc2m,<-p
int a = temp[l]; ^U8r0]9
int b = temp[r]; ^:jN3@Q%
for (i = l, j = r, k = l; k <= r; k++) { yRYWch
if (a < b) { R, 8s_jN
data[k] = temp[i++]; l"zUv
a = temp; /)rkiwp
} else { WWZ9._
data[k] = temp[j--]; f0LP?]
b = temp[j]; y9|K|xO[
} <d7V<&@o=
} 7.+#zyF
} 9=/N|m8.
Bz`yfl2
/** )P>u9=?,=E
* @param data D8# on!
* @param l V=:_d,
* @param i pNE(n4v
*/ ~/tKMS6T
private void insertSort(int[] data, int start, int len) { l~Lb!;,dN
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); sF+=KH
} #DkD!dW(l
} ;bX4(CMe &
} H2-28XGc
} @lUlY2
3v!~cC~cI
堆排序： (,xZGa
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package org.rut.util.algorithm.support; H_IGFZCh
0%;146.p
import org.rut.util.algorithm.SortUtil; bxXiQa
U~2`P
/** oT|m1aGE
* @author treeroot ,`8Y8
* @since 2006-2-2 '7im
* @version 1.0 dy>|cj
*/ n!He&
public class HeapSort implements SortUtil.Sort{ sxED7,A
0D(cXzQP
/* (non-Javadoc) R& =f:sEi
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 8"vwU@cfC
*/ >LF&EM]
public void sort(int[] data) { ! qJI'+_
MaxHeap h=new MaxHeap(); e^$j5jV
h.init(data); kYxS~Kd<
for(int i=0;i h.remove(); ER{3,0U
System.arraycopy(h.queue,1,data,0,data.length); $'[q4wo<
} \`xkp[C
*,\` o~
private static class MaxHeap{ P l{QOR
9''p[V.3
void init(int[] data){ IdM*5Y>f
this.queue=new int[data.length+1]; YJ2ro-X
for(int i=0;i queue[++size]=data; []&(D_e"
fixUp(size); 9F+P@Kp
} aN^IP
} hGP1(pH.
Vul+]h[!h
private int size=0; <2P7utdZ
)8{6+{5lu
private int[] queue; j:1uP^.
i!MwBYk
public int get() { c/u_KJFF-n
return queue[1]; Eb.;^=x
} V_L[P9
PtKTm\,JL0
public void remove() { X$wehMBX
SortUtil.swap(queue,1,size--); 9|!j4DS<
fixDown(1); }&G]0hCT!
} IvW@o1Q
file://fixdown ?G/hJ?3
private void fixDown(int k) { +CTmcbyOi
int j; Ds5NAp:x
while ((j = k << 1) <= size) { ^@}#me@
if (j < size %26amp;%26amp; queue[j] j++; Eqphd!\#6
if (queue[k]>queue[j]) file://不用交换 GH3#E*t+[
break; < `Z%O<X
SortUtil.swap(queue,j,k); cINHH !v
k = j; H|+tC=]4IZ
} 5iWe-xQ>
} 4-:7.I(hq
private void fixUp(int k) { =p\Xy*
while (k > 1) { ,sb1"^Wc
int j = k >> 1; 6d{j0?mM
if (queue[j]>queue[k]) XS0V:<+,
break; {~GR8 U
SortUtil.swap(queue,j,k); WaYO1*=
k = j; u;n(+8sz
} 1| xN%27>
} |ft:|/^F&
}h~'AM
} /= ^L iP
9!t4>
} _IYY08&(r
t>U!Zal"
SortUtil： gEKO128
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package org.rut.util.algorithm; XU#,Bu{
kQ}s/*
import org.rut.util.algorithm.support.BubbleSort; +?e}<#vd'?
import org.rut.util.algorithm.support.HeapSort; &LU'.jY
import org.rut.util.algorithm.support.ImprovedMergeSort; jpO38H0)
import org.rut.util.algorithm.support.ImprovedQuickSort; XZ:1!;
import org.rut.util.algorithm.support.InsertSort; 9oq)X[
import org.rut.util.algorithm.support.MergeSort; ^"tqdeCb=
import org.rut.util.algorithm.support.QuickSort; 98<zCSe\]
import org.rut.util.algorithm.support.SelectionSort; Jf+7"![|
import org.rut.util.algorithm.support.ShellSort; UpeQOC
q$^<zY
/** caD5Pod4
* @author treeroot ,35Ag#va
* @since 2006-2-2 deM~[1e[
* @version 1.0 ~N[|bPRmhE
*/ D9ywg/Q91
public class SortUtil { bhKV +oN
public final static int INSERT = 1; slSR=XOG
public final static int BUBBLE = 2; zH+<bEo=1=
public final static int SELECTION = 3; P|N?OocE
public final static int SHELL = 4; h>tsis'N9
public final static int QUICK = 5; [s %\.y(q
public final static int IMPROVED_QUICK = 6; y#r\b6
public final static int MERGE = 7; 6{^*JC5nj
public final static int IMPROVED_MERGE = 8; cMtJy"kK
public final static int HEAP = 9; B&nw#saz.
v@,XinB[
public static void sort(int[] data) { N<bD
sort(data, IMPROVED_QUICK); n1)'cS5}
} ' C6:e?R
private static String[] name={ Y~GUR&ww0n
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" w)<4>(D
}; u<q)SQ1
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private static Sort[] impl=new Sort[]{ 2;R/.xI6v
new InsertSort(), W^ClHQ"Iy
new BubbleSort(), `1_FQnm)
new SelectionSort(), *(VbPp_H_
new ShellSort(), D'?]yyrf
new QuickSort(), \I xzdFF#
new ImprovedQuickSort(), Wy,"cT
new MergeSort(), w#d}TY
new ImprovedMergeSort(), 0hZxN2r
new HeapSort() >%i9oI<)
}; Dtt\~m;AR
sKCGuw(mh
public static String toString(int algorithm){ $Q,n+ /
return name[algorithm-1]; n%U9iwJ.
} UNY@w=]<
I~'gK8<e7
public static void sort(int[] data, int algorithm) { *p"O*zj
impl[algorithm-1].sort(data); _6J<YQK
} 9H8=eJd
[Z% l.
public static interface Sort { <mn-=#)
public void sort(int[] data); &X7ttB"#h
} ,{TQ ~LP
t*rp3BIG
public static void swap(int[] data, int i, int j) { EUXV/QV{
int temp = data; iGyVG41U
data = data[j]; 4Q/r[x/&C
data[j] = temp; A<;0L . J
} z,os MS
} 9`,,%vdj