[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; `uHpj`EU
} f,>i%.
int i1=l; * U4:K@y
int i2=mid+1; 8B/9{8
for(int cur=l;cur<=r;cur++){ 3~ZVAg[c
if(i1==mid+1) C5UDez
data[cur]=temp[i2++]; -;$/<
else if(i2>r) [)~@NN
data[cur]=temp[i1++]; Rn_c9p
else if(temp[i1] data[cur]=temp[i1++]; ?y)X$D^
else /g''-yT7#
data[cur]=temp[i2++]; V?BVk8D};
} N-E`go
} qhtAtP>i"
^^l"brPa
} .~ lt+M9
ycD.:w p\'
改进后的归并排序: -<]_:Kf{;&
gq3OCA!cX
package org.rut.util.algorithm.support; (t$/G3E
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import org.rut.util.algorithm.SortUtil; \r,.hUp
Ky$G$H
/** %0]b5u
* @author treeroot $]JIA|
* @since 2006-2-2 .6o y>4
* @version 1.0 N06O.bji
*/ 3>)BI(Wl
public class ImprovedMergeSort implements SortUtil.Sort { }yDq\5s Q[
>[4|6k|\x
private static final int THRESHOLD = 10; B RjKV
':)j@O3-
/* ky$:C,1t
* (non-Javadoc) =3dbw8I
* jYID44$
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 9R"N#w.U]
*/ }IkEyJsk
public void sort(int[] data) { I} fcFL8
int[] temp=new int[data.length]; ./y[<e
mergeSort(data,temp,0,data.length-1); ~{Rt4o _W
} l!V| T?
^i)Q CDU7
private void mergeSort(int[] data, int[] temp, int l, int r) { N%|Vzc
int i, j, k; Tc5OI'-V
int mid = (l + r) / 2; } %CbZ/7&
if (l == r) yi-"hT`
return; N<"6=z@w+
if ((mid - l) >= THRESHOLD) ZfCr"aL
mergeSort(data, temp, l, mid); X3L[y\
else 3nC#$L-
insertSort(data, l, mid - l + 1); um2s^G
if ((r - mid) > THRESHOLD) c0Ro3j\p
mergeSort(data, temp, mid + 1, r); NF(IF.8G
else }rA+W-7
insertSort(data, mid + 1, r - mid); JKi@Kw
Iki+5
for (i = l; i <= mid; i++) { "q>I?UcZ
temp = data; _.*4Y
} r2F
for (j = 1; j <= r - mid; j++) { UEQ'D9
temp[r - j + 1] = data[j + mid]; cc(r,ij~4
} &G|jzXE
int a = temp[l]; fy=C!N&/
int b = temp[r]; b|8>eY
for (i = l, j = r, k = l; k <= r; k++) { IQi[g~E.5
if (a < b) { Nw>T$RzS
data[k] = temp[i++]; ;n7|.O]*
a = temp; ivUsMhx>S,
} else { -,fa{yt-
data[k] = temp[j--]; $aPHl
b = temp[j]; ctUF/[_w;
} CBnouKc:
} r|\'9"@
} )\D40,p
s@)"IdSA(
/** _?]BVw
* @param data l88a#zUQDN
* @param l |RAQ%VXm
* @param i Wt)SdF=U/
*/ ,[}yf#8@J
private void insertSort(int[] data, int start, int len) { bu"68A;>
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); t3#H@0<
} )Rhff$
} 01{r^ZT`RH
} OBw`!G*w
} r0g/:lJi
Msa6yD#
堆排序： VkTlPmr
I~]Q55
package org.rut.util.algorithm.support; ULNAH`{D
4I#eC#"
import org.rut.util.algorithm.SortUtil; Dd5xXs+c
H?`)[#
/** 4$?wD <
* @author treeroot d(DX(xg
* @since 2006-2-2 =(|xU?OL
* @version 1.0 Nr]8P/[~
*/ pe!dm}!h[
public class HeapSort implements SortUtil.Sort{ o1#:j?sN
GIRSoRVsh
/* (non-Javadoc) s?@)a,C%k
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) F[7Kw"~J
*/ DD@)z0W
public void sort(int[] data) { e:$7^Y,U/
MaxHeap h=new MaxHeap(); 'Wf?elB+
h.init(data); W<rTq0~$?
for(int i=0;i h.remove(); }#ep}h
System.arraycopy(h.queue,1,data,0,data.length); U50s!Zt45
} ` Y{>2UFX
)H;pGM:
private static class MaxHeap{ C?[a3rNH(
0HHui7Yy>
void init(int[] data){ p- "Z'$A`
this.queue=new int[data.length+1]; @@%i(>4Z
for(int i=0;i queue[++size]=data; r)6uX
fixUp(size); o9m
} UK"}}nO@e
} + %MO7vL
G%7 4v|cd
private int size=0; pK6e/eC
d1~_?V'r]
private int[] queue; mFqSD
yHWi[7$
public int get() { Cdp]Nv6
return queue[1]; :H!(?(Pie
} 5!'R'x5e
$5TepH0D
public void remove() { AezvBY0'`z
SortUtil.swap(queue,1,size--); o~v_PD[S
fixDown(1); *<*0".#
} =zeFK_S!
file://fixdown eeW' [
private void fixDown(int k) { 2E`~ qn
int j; ~9JW#HHzn
while ((j = k << 1) <= size) { V&Xi> X8
if (j < size %26amp;%26amp; queue[j] j++; L@{!r=%_>
if (queue[k]>queue[j]) file://不用交换 4GG1E. z}
break; \4h>2y
SortUtil.swap(queue,j,k); 1Yc%0L(
k = j; ?xtt7*'D
} `6a]|7|f
} EKZ$Q4YE
private void fixUp(int k) { N#(jK1`y
while (k > 1) { Yv)Bj
int j = k >> 1; _Kc1
if (queue[j]>queue[k]) i(Ip(n
break; %&^Q(f
SortUtil.swap(queue,j,k); mD9STuA$H
k = j; 28nmQ
} \\=.6cg<K
} NH'1rt(w
zuUT S[
} jja{*PZ6H
j((hqJr
} B|cA[
x!'7yx
SortUtil： f?,-j>[.=f
Q]< (bD.7
package org.rut.util.algorithm; 4\p$4Hs}
H76E+AY
import org.rut.util.algorithm.support.BubbleSort; Ci;h
import org.rut.util.algorithm.support.HeapSort; *"1~bPl
import org.rut.util.algorithm.support.ImprovedMergeSort; bfFmTI$,
import org.rut.util.algorithm.support.ImprovedQuickSort; sz'p3
import org.rut.util.algorithm.support.InsertSort; <5dH *K
import org.rut.util.algorithm.support.MergeSort; Z[Wlyb0
import org.rut.util.algorithm.support.QuickSort; m&Lt6_vi
import org.rut.util.algorithm.support.SelectionSort; m7JPH7P@BM
import org.rut.util.algorithm.support.ShellSort; g^1r0.Sp{8
5N\+@grp
/** f2NA=%\
* @author treeroot o6*/o ]]
* @since 2006-2-2 0z/h+,
* @version 1.0 yL.^ =
*/ Zp`~}LV{
public class SortUtil { V|TA:&:7
public final static int INSERT = 1; d7E7f
public final static int BUBBLE = 2; QV0M/k<'
public final static int SELECTION = 3; ~L~]QN\3
public final static int SHELL = 4; zt?h^zf}
public final static int QUICK = 5; rsWQHHkO
public final static int IMPROVED_QUICK = 6; 'GkvUrD9D$
public final static int MERGE = 7; h6g:(3t6m
public final static int IMPROVED_MERGE = 8; `4LJ;KC(
public final static int HEAP = 9; {gsW(T>)
Jz0K}^Dj[
public static void sort(int[] data) { =c&62;O
sort(data, IMPROVED_QUICK); i-b1d'?Rb
} 6J\q`q(W(
private static String[] name={ #pX8{Tf[
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" EY~7oNfc`R
}; mbyih+amCr
w,Q)@]_
private static Sort[] impl=new Sort[]{ YZ< NP
new InsertSort(), e8{^f]5
new BubbleSort(), //<:k8
new SelectionSort(), yw'ezpO"
new ShellSort(), eES'}[W>
new QuickSort(), (xL :;
new ImprovedQuickSort(), x9%-plP
new MergeSort(), @ u+|=x];
new ImprovedMergeSort(), ;,rnk-
new HeapSort() ENq"mwV|
}; 088C|
@bT3'K-4
public static String toString(int algorithm){ 3za`>bUN
return name[algorithm-1]; &\k?xN
} $T),DUYO
.b,~f
public static void sort(int[] data, int algorithm) { Fj^AWv^/
impl[algorithm-1].sort(data); n'?4.tb
} IcFK,y%1
4\ FP
public static interface Sort { I8k
public void sort(int[] data); &2{]hRM
} nWGR5*e:
IBET'!j4"
public static void swap(int[] data, int i, int j) { TT7PQf >
int temp = data; ({e7U17[#
data = data[j]; BC({ EE~R)
data[j] = temp; 4%7s259%
} E*k([ZL
} _R74/|