[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; %eB0)'
} F0W4B
int i1=l; #\[h.4i
int i2=mid+1; a,tzt ]>
for(int cur=l;cur<=r;cur++){ 7T9m@
if(i1==mid+1) >Lx,<sE
data[cur]=temp[i2++]; q 9lz
else if(i2>r) ]l7) F-v
data[cur]=temp[i1++]; qZACX.Hw
else if(temp[i1] data[cur]=temp[i1++]; =<R")D]4z
else %yX?4T;b
data[cur]=temp[i2++]; 2jV.\C k
} losm<
} 56t9h/y
6z=h0,Y}
} c[J(H,mt/
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改进后的归并排序: 2K4Jkyi
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package org.rut.util.algorithm.support; :kz*.1
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import org.rut.util.algorithm.SortUtil; A5cx!h
NFw7g&1;Kp
/** cih@:=Qy
* @author treeroot v7&oHOk!
* @since 2006-2-2 ["Mq
* @version 1.0 xDU>y
*/ ;[TC`DuNj0
public class ImprovedMergeSort implements SortUtil.Sort { "<uaG?:
iq2)oC_
private static final int THRESHOLD = 10; ^F2OTz4n
@TF^6)4f
/* Uyf<:8U\
* (non-Javadoc) !D6
* <"F\&M`G
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) @zo}#.g
*/ DKw%z8ft|
public void sort(int[] data) { qniP`P4E
int[] temp=new int[data.length]; IZ+kw.6e
mergeSort(data,temp,0,data.length-1); Tlc3l}B*Z
} l?Vm/YXb
Agt6G\n
private void mergeSort(int[] data, int[] temp, int l, int r) { n+1!/H=d
int i, j, k; Y|JC+Ee
int mid = (l + r) / 2; A/V"&H[
if (l == r) /{@^h#4M1
return; U$jw8I'.
if ((mid - l) >= THRESHOLD) w/_n$hX
mergeSort(data, temp, l, mid); VQ wr8jXye
else Cq\1t
insertSort(data, l, mid - l + 1); +TzZ
if ((r - mid) > THRESHOLD) hbl%<ItI49
mergeSort(data, temp, mid + 1, r); (1pI#H"f9
else 9D@ $Y54
insertSort(data, mid + 1, r - mid); YuufgPE*H
i4;`dCT|A
for (i = l; i <= mid; i++) { 7{F(NJUO1
temp = data; ${I$@qq83
} x?s5vxAKf
for (j = 1; j <= r - mid; j++) { ]gHxvT\E
temp[r - j + 1] = data[j + mid]; s+#|j;V<
} .G-F5`2I
int a = temp[l]; PL vz1}ts
int b = temp[r]; &q~**^;'
for (i = l, j = r, k = l; k <= r; k++) { }#0MJ6L
if (a < b) { 4HXqRFUD
data[k] = temp[i++]; |]=. ^
a = temp; i T* !3
} else { [4qCW{x._
data[k] = temp[j--]; Xc)V;1
b = temp[j]; %f??O|O3
} h M{&if
} ~{69&T}9
} vn oI.;H,
"p]Fq,
/** +!_?f'kv`
* @param data F:$Dz?F0v
* @param l 'zYKG5A
* @param i "V/|RC
*/ w\(LG_n|
private void insertSort(int[] data, int start, int len) { V[E7mhqy
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 6 0C;J!D
} n =SY66
} jC_7cAsl
} _`RzPIS^
} %Xm3m0nsv{
)HZUCi/F]
堆排序： \=n0@1Q=>
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package org.rut.util.algorithm.support; f1eY2UtWQ
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import org.rut.util.algorithm.SortUtil; _PTo!aJL
{8L)Fw
/** 31BN ?q
* @author treeroot 00DWXGt20o
* @since 2006-2-2 $#Mew:J
* @version 1.0 "v.]s;g
*/ xL.T}f~y2>
public class HeapSort implements SortUtil.Sort{ {sn:Lj0
Znl&.,c)
/* (non-Javadoc) X`,4pSQ;
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 1\v$8pP+
*/ _-NS-E
public void sort(int[] data) { 6yIl)5/=
MaxHeap h=new MaxHeap(); R<r"jOd]
h.init(data); L,@OOBD
for(int i=0;i h.remove(); c k~gB
System.arraycopy(h.queue,1,data,0,data.length); ?(8z O"
} 8 I'1~d%$
_ F0qqj
private static class MaxHeap{ Dq T)%a
d<*4)MRN
void init(int[] data){ qF9rY)ifm
this.queue=new int[data.length+1]; 3F%Qq7v
for(int i=0;i queue[++size]=data; j s(E-d/
fixUp(size); Bjg 21bw^
} 9&'I?D&8
} , N:'Z
apW0(&\
private int size=0; 6r"PtHr
rWN#QL()*
private int[] queue; 3YY<2<
H>AzxhX[n
public int get() { kvU0$1
return queue[1]; dhW;|
} ~;ink
1'|6IR1'
public void remove() { )g4oUZDF
SortUtil.swap(queue,1,size--); 3t(8uG<rL
fixDown(1); * *?mZtF
} /Vpd*obMB
file://fixdown Z_%}pe39B
private void fixDown(int k) { DSwF }
int j; ?FRR";
while ((j = k << 1) <= size) { Y^dVNC3vd
if (j < size %26amp;%26amp; queue[j] j++; T7;)HFGeW
if (queue[k]>queue[j]) file://不用交换 m8rz i:
break; 0F'75
SortUtil.swap(queue,j,k); CK e
k = j; {GF>HHQb
} ^qpa[6D6x
} mB(*)PwZ
private void fixUp(int k) { 0XlX7Sk+
while (k > 1) { i'!M<>7
int j = k >> 1; .?SClTqg
if (queue[j]>queue[k]) 0w >DU^+
break; D#%J||
SortUtil.swap(queue,j,k); QN(f8t(
k = j; dRZor gar
} XEqg%f
} >qA5
i_GE9A=h
} 1{ #Xa=
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} |-7<?aw"
GS{:7%=j
SortUtil： 6RZ[X[R[}
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package org.rut.util.algorithm; D} 0>x~
^v3+w"2
import org.rut.util.algorithm.support.BubbleSort; Y51XpcXQ
import org.rut.util.algorithm.support.HeapSort; V>P\yr?
import org.rut.util.algorithm.support.ImprovedMergeSort; Y6A]dk
import org.rut.util.algorithm.support.ImprovedQuickSort; /x_C
import org.rut.util.algorithm.support.InsertSort; @];#4O
import org.rut.util.algorithm.support.MergeSort; Fm}O,=
import org.rut.util.algorithm.support.QuickSort; 81a&99k#
import org.rut.util.algorithm.support.SelectionSort; 4~a0
import org.rut.util.algorithm.support.ShellSort; o,) p*glO
*9^CgLF
/** Cu({%Gy+
* @author treeroot ^JtGT
* @since 2006-2-2 hBsjO3n
* @version 1.0 whNRUOK:
*/ 4\(;}M-R{
public class SortUtil { Y,D\_il_
public final static int INSERT = 1; {s8''+Q#(-
public final static int BUBBLE = 2; 'D(Hqdr;:
public final static int SELECTION = 3; T GMHo{]
public final static int SHELL = 4; 89l_%To
public final static int QUICK = 5; ,WOF)
public final static int IMPROVED_QUICK = 6; 9[N'HpQ3
public final static int MERGE = 7; 0jv9N6IM
public final static int IMPROVED_MERGE = 8; z>j%-3_1
public final static int HEAP = 9; KHr8\qLH
_|8"&*T^
public static void sort(int[] data) { *Oz5I
sort(data, IMPROVED_QUICK); hZlajky
} (p} N9n$
private static String[] name={ ]CC= \<
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ;_j\E(^%
}; }VR&*UJE
M _U$I7
private static Sort[] impl=new Sort[]{ BHj]w*Ov
new InsertSort(), dab>@z4
new BubbleSort(), },a|WL3^
new SelectionSort(), 3|:uIoR{
new ShellSort(), ](_(1
new QuickSort(), |ry;'[*
new ImprovedQuickSort(), U7crbj;c)d
new MergeSort(), qw87B!D
new ImprovedMergeSort(), 8zj09T[
new HeapSort() 4v2(YJ%u
}; (kp}mSw
>\DXA)nc
public static String toString(int algorithm){ EZP2Bb5g
return name[algorithm-1]; 0nie>
} D3.sR\Hxf
dc&Qi_W
public static void sort(int[] data, int algorithm) { BpP\C!:^
impl[algorithm-1].sort(data); n]Dq
} L&3=5Bf9
^ioTd
public static interface Sort { uFdSD
public void sort(int[] data); iI&SI#; _
} =As'vt 0
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public static void swap(int[] data, int i, int j) { @oRYQ|.R
int temp = data; ObM5vrEk|
data = data[j]; }Pb!u9_
data[j] = temp; UjKHGsDi4
} D'nV &m
} &I(|aZx?J