[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; NizJq*V>
} .-26 N6S
int i1=l; v*]Xur6e}
int i2=mid+1; YK+Z0ry
for(int cur=l;cur<=r;cur++){ <C`eZ}Qqv
if(i1==mid+1) \w_[tPz}
data[cur]=temp[i2++]; >E,L"&_j
else if(i2>r) %C][E^9
data[cur]=temp[i1++]; _ktSTzH0
else if(temp[i1] data[cur]=temp[i1++]; ?d#(ian
else +4p;4/=
data[cur]=temp[i2++]; PaeafL65=
} Pk]9.e1_
} IlL
v%7JZ<I'A
} IguG03:.N
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改进后的归并排序: l3|>*szX
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package org.rut.util.algorithm.support; ^t%M
L#@$Mtc
import org.rut.util.algorithm.SortUtil; 0m!ZJHe
dZYJ(7%
/** nMoF;AdKm
* @author treeroot K~%5iVO~\
* @since 2006-2-2 U"kK]Stk<
* @version 1.0 I%|s
*/ KQZRzX>0
public class ImprovedMergeSort implements SortUtil.Sort { K:50?r_-6
%|* y/m
private static final int THRESHOLD = 10; #YVDOR{z
cCKda3v!O
/* *ik)>c_
* (non-Javadoc) B=/=U7T
* >Ez}r(QQ^
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ghQsS|)p.
*/ 0 S8{VZpy
public void sort(int[] data) { !3M!p&
int[] temp=new int[data.length]; ^a5~FI:
mergeSort(data,temp,0,data.length-1); 4GejT(U
} &'2l_b
Y tj>U
private void mergeSort(int[] data, int[] temp, int l, int r) { ] r+I D
int i, j, k; 2xBGs9_Y
int mid = (l + r) / 2; Jpnp'
if (l == r) .@Sh,^v
return; RXvcy<
if ((mid - l) >= THRESHOLD) H$iMP.AK
mergeSort(data, temp, l, mid); \/%Q PE8
else =,Um;hU3r
insertSort(data, l, mid - l + 1); a#**96Av
if ((r - mid) > THRESHOLD) #^w 1!xXD
mergeSort(data, temp, mid + 1, r); +mPB?5
else }slEkpk?]
insertSort(data, mid + 1, r - mid); '~=xP
ky"7 ^
for (i = l; i <= mid; i++) { fb=vO U
temp = data; l{{ #tW
} 4[j) $!l`
for (j = 1; j <= r - mid; j++) { w8Vzx8
temp[r - j + 1] = data[j + mid]; md_s2d
} \aRB
int a = temp[l]; ;G&O"S><]c
int b = temp[r]; ~i {)J
for (i = l, j = r, k = l; k <= r; k++) { TU6EE
if (a < b) { ~a)20
data[k] = temp[i++]; r|$g((g
a = temp; "d*
} else { n8C {Okr
data[k] = temp[j--]; Ok"wec+,
b = temp[j]; 9uo\&,,
} ]qQB+]WN
} 2!`Z3>Oa
} A[Xw|9
cv&hT.1
/** z`6KX93
* @param data xBd%e-r
* @param l ]sIFK
* @param i ]z@]Fi33Y
*/ R|yTUGY
private void insertSort(int[] data, int start, int len) { HM x9M$
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); c9K\K~bk
} @XJv9aq
} MQI=
} VAz+J
} !1]xKNp]
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堆排序： P=g+6-1
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package org.rut.util.algorithm.support; *V+fRN4 W
!b Km}1T
import org.rut.util.algorithm.SortUtil; <Z wEdq
yw^,@'
/** _z<q9:
* @author treeroot Cr"hu;
* @since 2006-2-2 EkPSG&6RZ
* @version 1.0 R``qQ;cc
*/ wjs7K|PK
public class HeapSort implements SortUtil.Sort{ }\*|b@)]
B!lw>rUMQ
/* (non-Javadoc) >m46tfoM
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 06r cW `
*/ T~d';P
public void sort(int[] data) { Z%{2/mQ
MaxHeap h=new MaxHeap(); f:>jH+o.S
h.init(data); e<pojb1Q
for(int i=0;i h.remove(); 5 [*jfOz
System.arraycopy(h.queue,1,data,0,data.length); Ei!z? sxzx
} uDUSR+E>
B$n\m854
private static class MaxHeap{ dWEx55>,1
-R]S)Odml
void init(int[] data){ "^%Il
this.queue=new int[data.length+1]; p^3d1H3
for(int i=0;i queue[++size]=data; 5^i ^?
fixUp(size); P^r8JhDJ
} q1j[eru
} "5FeP;
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private int size=0; (nG
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private int[] queue; }r[BME
[\y>Gv%
public int get() { jLU)S)
return queue[1]; SX.v5plhc
} XPSWAp)
G%{jU'2
public void remove() { _,QUH"
SortUtil.swap(queue,1,size--); bzTM{<]sv
fixDown(1); G"(!5+DLy
} ~5zhK:7c
file://fixdown 4H)a7<,
private void fixDown(int k) { W\.(~-(So
int j; [ CY=
while ((j = k << 1) <= size) { j@f(cRAf#
if (j < size %26amp;%26amp; queue[j] j++; #:X:~T
if (queue[k]>queue[j]) file://不用交换 <U";V)
break; 16U@o>O
SortUtil.swap(queue,j,k); -rBj-4|"
k = j; x4(WvQ%O#
} *%.*vPJ
} \ U_DTI
private void fixUp(int k) { _{8boDX#
while (k > 1) { 01b0;|
int j = k >> 1; \hVFK6
if (queue[j]>queue[k]) 9hQ{r 2
break; -vQ`}e1
SortUtil.swap(queue,j,k); m"5gzH
k = j; +VDB\n
} c'C2V9t
} |gNOv;l
`CBTZG09
} }T@AoIR0t
*^]ba>
} #=2~MXa@z7
5;+Bl@zGu
SortUtil： X|:O`b$G
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package org.rut.util.algorithm; uQ}kq7gd
!{+(oDN
import org.rut.util.algorithm.support.BubbleSort; (plOV)
import org.rut.util.algorithm.support.HeapSort; V3S`8VI
import org.rut.util.algorithm.support.ImprovedMergeSort; tBt\&{=|D
import org.rut.util.algorithm.support.ImprovedQuickSort; Gvwel!6
import org.rut.util.algorithm.support.InsertSort; H'0S;A+Y6
import org.rut.util.algorithm.support.MergeSort; !nVuvsbv
import org.rut.util.algorithm.support.QuickSort; }j QwP3eY
import org.rut.util.algorithm.support.SelectionSort; QHeUpJ/^
import org.rut.util.algorithm.support.ShellSort; u<[Y6m
8GX@76o
/** >8c9-dTmf
* @author treeroot 4f+Ke*^[RA
* @since 2006-2-2 xE:p)B-]
* @version 1.0 :v+39
*/ zB4gnVhus|
public class SortUtil { juM?y'A
public final static int INSERT = 1; &j$k58mX
public final static int BUBBLE = 2; o{/D:B
public final static int SELECTION = 3; y_w4ei
public final static int SHELL = 4; l)zS}"F,
public final static int QUICK = 5; on~rrSK
public final static int IMPROVED_QUICK = 6; Sn0 Gw
public final static int MERGE = 7; UCFef,VW
public final static int IMPROVED_MERGE = 8; fu/v1~X
public final static int HEAP = 9; [>fE{~Y
iqpy5
public static void sort(int[] data) { gs'(px
sort(data, IMPROVED_QUICK); *l}q,9iQ-
} cK""Xz&m
private static String[] name={ ZCa?uzeo]
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" BX?Si1c
}; z>!b
?%?@?W>s@
private static Sort[] impl=new Sort[]{ awUIYAgJ3
new InsertSort(), ]Kd:ZmJ
new BubbleSort(), 9tJiIr8i
new SelectionSort(), '{EDdlX
new ShellSort(), )%0#XC^/X5
new QuickSort(), fz%urbJR
new ImprovedQuickSort(), :jA~zHO
new MergeSort(), a"}?{
new ImprovedMergeSort(), w%htY.-
new HeapSort() {ES3nCL(8
}; /D eU`rj
IP-mo!Y.
public static String toString(int algorithm){ i;cqK&P;]
return name[algorithm-1]; :Q89j4,
} L(iWFy1& T
hTF]-& hZ
public static void sort(int[] data, int algorithm) { Wn|w~{d{
impl[algorithm-1].sort(data); v vFX\j3
} VE!h!`<k
_d:l1jD
public static interface Sort { l+@NjZGm<
public void sort(int[] data); 3SDw-k
} ]krOPM/
=6ojkTk
public static void swap(int[] data, int i, int j) { zg|]Ic
int temp = data; 2$|WXYY
data = data[j]; IRLT-
data[j] = temp; <EJC.WWJa
} /" ,]J
} Av{1~%hU