[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; 5&v~i\Q
} RRRCS]y7$t
int i1=l; MYla OT
int i2=mid+1; ^Wc@oa`
for(int cur=l;cur<=r;cur++){ 0Uo\wyd
if(i1==mid+1) FrTi+& <
data[cur]=temp[i2++]; AWP"b?^G|
else if(i2>r) ]|MEx{BG-
data[cur]=temp[i1++]; A%`[mc]4#
else if(temp[i1] data[cur]=temp[i1++]; k\WR ]
else 1#.>a$>
data[cur]=temp[i2++]; G'6@+$ppS
} Qp/QaVQ+
} Tav*+
2^^`n1?'
} 9?0^ap,T
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改进后的归并排序: vg3=8>#
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package org.rut.util.algorithm.support; kPVO?uO
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import org.rut.util.algorithm.SortUtil; lrv3fPIW
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/** Zrvz;p@~
* @author treeroot !q9+9 *6
* @since 2006-2-2 2 dAB-d:k
* @version 1.0 ~kZ G{
*/ ~ vJ,`?
public class ImprovedMergeSort implements SortUtil.Sort { W7 Cc
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private static final int THRESHOLD = 10; VO$ iNK
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/* MrDc$p W G
* (non-Javadoc) %kdEun
* 0URji~?|x
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) c )G3k/T5
*/ 4WJ.^(
public void sort(int[] data) { qMLD)rL
int[] temp=new int[data.length]; dR"@`
mergeSort(data,temp,0,data.length-1); d5oIH
} Y8o)FVcyNy
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private void mergeSort(int[] data, int[] temp, int l, int r) { Z/t+8;TMR,
int i, j, k; Jh ]i]7r
int mid = (l + r) / 2; Cq%IE^g<
if (l == r) )rekY;
return; D|Q#gcWpo
if ((mid - l) >= THRESHOLD) ,6om\9.E@
mergeSort(data, temp, l, mid); {buo^kgj`]
else @}@Z8$G^
insertSort(data, l, mid - l + 1); O*0l+mop
if ((r - mid) > THRESHOLD) YhDtUt}?
mergeSort(data, temp, mid + 1, r); G&4&-<
else M+w=O!dq
insertSort(data, mid + 1, r - mid); !"\80LP
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for (i = l; i <= mid; i++) { i70wrW#k
temp = data; ]=>F.GE
} &ge "x{,?
for (j = 1; j <= r - mid; j++) { 4scNSeW
temp[r - j + 1] = data[j + mid]; i[?Vin
} >AcrG]
int a = temp[l]; Ib+Y~ XYR
int b = temp[r]; V+VkY3
for (i = l, j = r, k = l; k <= r; k++) { 4<k9?)~(J
if (a < b) { /+@p7FqlE
data[k] = temp[i++]; }Q=!Y>Tc
a = temp; eA#;AQm
} else { T3k#VNH
data[k] = temp[j--]; vvKEv/pN7
b = temp[j]; Y?(r3E^x
} b/C`Jp
} {=F/C,-
} QNpqdwu%h
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/** QWzB6H]
* @param data Sgp;@4`M
* @param l px}|Mu7z~
* @param i >_|O1H./4
*/ EUN81F?
private void insertSort(int[] data, int start, int len) { [%77bv85.G
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); x "^Xj]-
} P] UJ0b
} "4uS3h2r
} C/TF-g-_Y
} e>(<eu~P
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堆排序： SjwyLc
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package org.rut.util.algorithm.support; _nbBIaHN{
`C$:Yf]%nG
import org.rut.util.algorithm.SortUtil; bO'Sgc[]
@I_8T$N=
/** =8; {\
* @author treeroot aC%m-m
* @since 2006-2-2 uF1~FKB
* @version 1.0 D"ND+*Q[X
*/ b\-&sM(W"
public class HeapSort implements SortUtil.Sort{ f]JM /
K }Vv4x1U
/* (non-Javadoc) rL+!tH
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ]3KhgK%c8
*/ CS==A57I
public void sort(int[] data) { li0i"
MaxHeap h=new MaxHeap(); &8l%T'gd
h.init(data); eS<lwA_
for(int i=0;i h.remove(); @8;W\L$~1
System.arraycopy(h.queue,1,data,0,data.length); /J:bWr
} BV>\ McI+
.pN`;*7`
private static class MaxHeap{ 0},PJ$8x
[&&1j@LQ*
void init(int[] data){ m0cP(
this.queue=new int[data.length+1]; rzh#CnL3
for(int i=0;i queue[++size]=data; !+L/Khw/C
fixUp(size); ]y,==1To
} rld67'KcE
} rmE"rf
.)<(Oj|4
private int size=0; { T-'t/0e(
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private int[] queue; ~ ; -! n;
N1|$$9G+
public int get() { ZE2$I^DY-
return queue[1]; 0IfKJ*]M
} XI22+@d6
IFDZfx
public void remove() { '+$EhFwD
SortUtil.swap(queue,1,size--); }lfnnK#
fixDown(1); dVsE^jsL
} $D}{]MN.
file://fixdown /XhIx\40l
private void fixDown(int k) { =u+d_'P7-R
int j; 2UFv9
while ((j = k << 1) <= size) { )e a:Q?
if (j < size %26amp;%26amp; queue[j] j++; (Nx;0"5IX
if (queue[k]>queue[j]) file://不用交换 h\PHKC2
break; J,AR5@)1
SortUtil.swap(queue,j,k); _c,'>aH=
k = j; 1. rj'
} L(khAmm
} l PK +$f$
private void fixUp(int k) { ,=|ZB4HA
while (k > 1) { }w1~K'ck}>
int j = k >> 1; QoG cWJ
if (queue[j]>queue[k]) 1;mW,l'`
break; 72oF,42y
SortUtil.swap(queue,j,k); p\JfFfC
k = j; Um: Hrjw
} dO4{|(z
} AiK
!kE-_dY6)
} ;ByOth|9P
/6h(6 *JI
} CC@.MA@9N
_h":>
SortUtil： 9Iz%ht
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package org.rut.util.algorithm; "V$Bnz\n
w*|7!iM
import org.rut.util.algorithm.support.BubbleSort; uvV;Mlo]
import org.rut.util.algorithm.support.HeapSort; v0YG,)_
import org.rut.util.algorithm.support.ImprovedMergeSort; opJMS6%r
import org.rut.util.algorithm.support.ImprovedQuickSort; bIEhgiH
import org.rut.util.algorithm.support.InsertSort; !X<~-G2)l
import org.rut.util.algorithm.support.MergeSort; cdG|m[
import org.rut.util.algorithm.support.QuickSort; kjtjw1\o
import org.rut.util.algorithm.support.SelectionSort; 9M1d%jT
import org.rut.util.algorithm.support.ShellSort; "sl1vzRN
]@0NO;bK>F
/** :P@rkT3Qt
* @author treeroot ]- 4QNc=
* @since 2006-2-2 NsJ(`zk:
* @version 1.0 a(v>Q*zNP
*/ !}r% u."
public class SortUtil { NN1$'"@NL
public final static int INSERT = 1; ?HV`| Cw
public final static int BUBBLE = 2; X_g 3rv1J
public final static int SELECTION = 3; {FG|\nPw
public final static int SHELL = 4; EoxQ */
public final static int QUICK = 5; e&qh9mlE
public final static int IMPROVED_QUICK = 6; kJ-*fe'S
public final static int MERGE = 7; aBw2f[mo
public final static int IMPROVED_MERGE = 8; * C6a?]
public final static int HEAP = 9; rn=m\Gv e
sSQs#+&=[
public static void sort(int[] data) { `A,g] 1C:
sort(data, IMPROVED_QUICK); A%{W{UP8N
} |R#"Th6mH!
private static String[] name={ n Ml%'[u
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" mK [0L
}; -atGlu2
_Jt 2YZdA
private static Sort[] impl=new Sort[]{ i6 (a@KRY
new InsertSort(), ZU9c 5/J
new BubbleSort(), OKvPL=~
new SelectionSort(), y:vxE8$Q
new ShellSort(), DANw1_X\
new QuickSort(), BZXUwqEh
new ImprovedQuickSort(), =T7A]U]
new MergeSort(), Zt&6Ua[Y}
new ImprovedMergeSort(), @bnG:np
new HeapSort() K&U7H:
}; z ly unJD(
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public static String toString(int algorithm){ DVkB$2]
return name[algorithm-1]; v^_mFp-}\
} {|yob4N
"n=vN<8(o
public static void sort(int[] data, int algorithm) { n]u<!.X
impl[algorithm-1].sort(data); yH<$k^0r*
} OHflIeq#@
$Tb G+Eb8
public static interface Sort { a<A+4uXyD
public void sort(int[] data); Ii^5\v|C
} %O<%UmR
8B#GbS K
public static void swap(int[] data, int i, int j) { =07]z@s
int temp = data; 4L73]3&
data = data[j]; bug Ot7
data[j] = temp; gt7VxZ
} 0^8)jpL$<9
} W.1As{