[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; w[WyT`6h!
} 6<uJ}3
int i1=l; w6-A-M6hD
int i2=mid+1; z)Yk&;XC
for(int cur=l;cur<=r;cur++){ Ny\c>$z
if(i1==mid+1) 9L"Z ~CUL
data[cur]=temp[i2++]; wa#$9p~Q
else if(i2>r) fpDx)lQ
data[cur]=temp[i1++]; P$a `8~w
else if(temp[i1] data[cur]=temp[i1++]; gG 9e.++:
else /YyimG7
data[cur]=temp[i2++]; _D{V(c<WD
} \BoRYb9h
} M<AjtDF%
A<1:vV
} [32]wgw+{1
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改进后的归并排序: z<T(afM{*
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package org.rut.util.algorithm.support; 9i&(VzY[=
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import org.rut.util.algorithm.SortUtil; d>RoH]K4
^-*q
/** l@h|os
* @author treeroot ,t2yw
* @since 2006-2-2 &gDwsW
* @version 1.0 Ew&pwsQ
*/ $,mljJSQv
public class ImprovedMergeSort implements SortUtil.Sort { efc<lSUR
?)Psf/
private static final int THRESHOLD = 10; -w[j`}([P9
C\Y%FTS:
/* h~!KNF*XW
* (non-Javadoc) \z~wm&
* v>p UVM
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) U#u=9%'
*/ *an^ 0
public void sort(int[] data) { L,(H(GeX
int[] temp=new int[data.length]; <wIz8V
mergeSort(data,temp,0,data.length-1); x)wlp{rLf
} ~x!"(
s>RtCw3,
private void mergeSort(int[] data, int[] temp, int l, int r) { ^:Mal[IR
int i, j, k; JQo"<<[
int mid = (l + r) / 2; bv NXA*0
if (l == r) ?4[IIX-
return; k\ 2.\Lwb
if ((mid - l) >= THRESHOLD) n^a&@?(+
mergeSort(data, temp, l, mid); _SW_I{fjr
else Ojh\H
insertSort(data, l, mid - l + 1); L.E6~Rv
if ((r - mid) > THRESHOLD) a/k0(
mergeSort(data, temp, mid + 1, r); csEF^T-
else w_>SxSS7
insertSort(data, mid + 1, r - mid); }o'WR'LX
]12ypcf
for (i = l; i <= mid; i++) { DE$HF*WY
temp = data; _#jR6g TY
} Dc2U+U(J
for (j = 1; j <= r - mid; j++) { _$Wj1h
temp[r - j + 1] = data[j + mid]; (i 3=XfZ!C
} fcim4dfP
int a = temp[l]; R#n!1~ (
int b = temp[r]; prdlV)LTpY
for (i = l, j = r, k = l; k <= r; k++) { ]]EOCGZ"
if (a < b) { T[?toqkD>z
data[k] = temp[i++]; P2j"L#%
a = temp; 8Hdm(>
} else { <$V!y dO
data[k] = temp[j--]; hHu?%f*
b = temp[j]; ; qQ* p
} ^#V7\;v$G
} JKXb$
} mh4<.6>5
8iB}gHe9
/** PQ#zF&gL9t
* @param data k|r+/gIV
* @param l fFSQLtm?E
* @param i HW@r1[Y
*/ )Rlh[Y& r
private void insertSort(int[] data, int start, int len) { 1 m>x5Dbk!
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 68!W~%?pR
} Qw,{"J
} mZ[tB/
} 0tFR. sS?
} jQV.U~25Q
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堆排序： zFFip/z\
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package org.rut.util.algorithm.support; Os5Xejh`I
|})7\o
import org.rut.util.algorithm.SortUtil; >l$qE
cD6T4
/** S,*
* @author treeroot gdx2&~
* @since 2006-2-2 /}ADV2sF
* @version 1.0 A_ftf7,
*/ -(Z%?]+
public class HeapSort implements SortUtil.Sort{ 3jJd)C R
G]$.bq[v
/* (non-Javadoc) }(yX$ 3?`
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) d,"6s=4(q
*/ ZJod=^T
public void sort(int[] data) { nXg:lCI-uu
MaxHeap h=new MaxHeap(); z0v|%&IK
h.init(data); _[kZ:#
for(int i=0;i h.remove(); x=7qC#+)
System.arraycopy(h.queue,1,data,0,data.length); Wpdn^=dhL
} 1B5]1&M
zG|#__=T
private static class MaxHeap{ #cF ?a5
CkHifmc(u-
void init(int[] data){ X`+8rO[
this.queue=new int[data.length+1]; ^T.icSxP
for(int i=0;i queue[++size]=data; 8Q*477=I
fixUp(size); Y~fa=R{W
} n6 VX0R
} in[yrqFb7t
x3QQ`w-
private int size=0; bo]= *
^(:Z*+X~>
private int[] queue; m0a<~
Z2t r?]
public int get() { ]i@WZ(
return queue[1]; kzb%=EI
} ^=1:!'*3D
=_@Q+N*]|(
public void remove() { ITmW/Im5
SortUtil.swap(queue,1,size--); W3HTQGV
fixDown(1); - / tzt
} (pud`@D;[
file://fixdown FL/395 <:
private void fixDown(int k) { ,5 ylrE
int j; Tg-HR8}X
while ((j = k << 1) <= size) { ^gu;
if (j < size %26amp;%26amp; queue[j] j++; >~vZ+YO
if (queue[k]>queue[j]) file://不用交换 ~t,-y*=
break; g3h:oQCS
SortUtil.swap(queue,j,k); ]CnqPLqL
k = j; R3<2Z0lqy
} >+3tOv3:
} w<o#/J9
private void fixUp(int k) { &UV=<Az{
while (k > 1) { ,u^S(vxyz
int j = k >> 1; `FP)-^A8
if (queue[j]>queue[k]) \k=.w
break; C6XTId=y#_
SortUtil.swap(queue,j,k); sI u{_b
k = j; +G!N@O
} .Z!!x
} RsYn6ozb
+7jr]kP9
} PC| U]
LWB"}#vt
} G36}4
U#O6l-xe]
SortUtil： (;V=A4F-D
*aXZONym
package org.rut.util.algorithm; ?/_8zpW
0,T'z,
import org.rut.util.algorithm.support.BubbleSort; |EJ&s393&
import org.rut.util.algorithm.support.HeapSort; ?Jlz{msI
import org.rut.util.algorithm.support.ImprovedMergeSort; VWlOMqL995
import org.rut.util.algorithm.support.ImprovedQuickSort; U8Pnt|0M
import org.rut.util.algorithm.support.InsertSort; H<M ggs-
import org.rut.util.algorithm.support.MergeSort; ]U]22I'+$2
import org.rut.util.algorithm.support.QuickSort; '8NKrI
import org.rut.util.algorithm.support.SelectionSort; 1@nGD<,.
import org.rut.util.algorithm.support.ShellSort; %`%xD>![
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/** kF9T 9
* @author treeroot ,KlTitJl\+
* @since 2006-2-2 |5wuYG
* @version 1.0 yJaQcGxE"
*/ wl{Fx+<^3
public class SortUtil { Lc|5&<8ZG1
public final static int INSERT = 1; ];waK2'2
public final static int BUBBLE = 2; .(Gq9m[~8H
public final static int SELECTION = 3; o0~+%&
public final static int SHELL = 4; T,72I
public final static int QUICK = 5; ~-,P1u!
public final static int IMPROVED_QUICK = 6; +e0]Y8J{
public final static int MERGE = 7; <}RU37,W
public final static int IMPROVED_MERGE = 8; 5#zwdoQ
public final static int HEAP = 9; g1Q^x/
G4Zs(:a
public static void sort(int[] data) { [?<"SJ,`
sort(data, IMPROVED_QUICK); /3*75
} x@F"ZiYD@O
private static String[] name={ G 1{F_
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" q|,I\H5}
}; rO% |PRP
?Uzs^rsb
private static Sort[] impl=new Sort[]{ "h/{YjUS
new InsertSort(), J9oGwP
new BubbleSort(), f[n#Eu}
new SelectionSort(), Y8I$JBO
new ShellSort(), A/W-'%+`
new QuickSort(), (lhbH]I
new ImprovedQuickSort(), #,O<E@E
new MergeSort(), ;T}#-`O_Im
new ImprovedMergeSort(), }Po&6^
new HeapSort() Yn,dM~|Cc
}; R/ 7G
"t+VF4r
public static String toString(int algorithm){ ?op6_a-wm
return name[algorithm-1]; W'\{8&:!
} "v-\nAu
qoBm!|q
public static void sort(int[] data, int algorithm) { im^G{3z
impl[algorithm-1].sort(data); m :ROq
} br"p D-}
fbSl$jn.
public static interface Sort { }-m/ 'Q
public void sort(int[] data); h3issi+N
} ,cs`6Bd4
i=%wZHc;
public static void swap(int[] data, int i, int j) { .J3lo:
int temp = data; QQKvy0?1
data = data[j]; Cw]Q)rX{
data[j] = temp; E9 QA<w
} \%9,<-~[
} @b2{'#9]}